Mon, 14 Feb 2011 03:21:18 -0800
7018378: JSR 292: _bound_int_mh produces wrong result on 64-bit SPARC
Reviewed-by: kvn
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
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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_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));
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_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);
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 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
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 }
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) {
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
402 const Register rcx_recv = rcx;
403 const Register rax_argslot = rax;
404 const Register rbx_temp = rbx;
405 const Register rdx_temp = rdx;
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);
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);
418 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
420 // some handy addresses
421 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
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() );
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() );
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)
434 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
436 if (have_entry(ek)) {
437 __ nop(); // empty stubs make SG sick
438 return;
439 }
441 address interp_entry = __ pc();
443 trace_method_handle(_masm, entry_name(ek));
445 BLOCK_COMMENT(entry_name(ek));
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 assert(raise_exception_method(), "must be set");
455 address c2i_entry = raise_exception_method()->get_c2i_entry();
456 assert(c2i_entry, "method must be linked");
458 const Register rdi_pc = rax;
459 __ pop(rdi_pc); // caller PC
460 __ mov(rsp, saved_last_sp); // cut the stack back to where the caller started
462 Register rbx_method = rbx_temp;
463 Label L_no_method;
464 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
465 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
466 __ testptr(rbx_method, rbx_method);
467 __ jccb(Assembler::zero, L_no_method);
469 const int jobject_oop_offset = 0;
470 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
471 __ testptr(rbx_method, rbx_method);
472 __ jccb(Assembler::zero, L_no_method);
473 __ verify_oop(rbx_method);
475 // 32-bit: push remaining arguments as if coming from the compiler.
476 NOT_LP64(__ push(rarg2_required));
478 __ push(rdi_pc); // restore caller PC
479 __ jump(ExternalAddress(c2i_entry)); // do C2I transition
481 // If we get here, the Java runtime did not do its job of creating the exception.
482 // Do something that is at least causes a valid throw from the interpreter.
483 __ bind(L_no_method);
484 __ push(rarg2_required);
485 __ push(rarg1_actual);
486 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
487 }
488 break;
490 case _invokestatic_mh:
491 case _invokespecial_mh:
492 {
493 Register rbx_method = rbx_temp;
494 __ load_heap_oop(rbx_method, rcx_mh_vmtarget); // target is a methodOop
495 __ verify_oop(rbx_method);
496 // same as TemplateTable::invokestatic or invokespecial,
497 // minus the CP setup and profiling:
498 if (ek == _invokespecial_mh) {
499 // Must load & check the first argument before entering the target method.
500 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
501 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
502 __ null_check(rcx_recv);
503 __ verify_oop(rcx_recv);
504 }
505 __ jmp(rbx_method_fie);
506 }
507 break;
509 case _invokevirtual_mh:
510 {
511 // same as TemplateTable::invokevirtual,
512 // minus the CP setup and profiling:
514 // pick out the vtable index and receiver offset from the MH,
515 // and then we can discard it:
516 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
517 Register rbx_index = rbx_temp;
518 __ movl(rbx_index, rcx_dmh_vmindex);
519 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
520 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
521 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
523 // get receiver klass
524 Register rax_klass = rax_argslot;
525 __ load_klass(rax_klass, rcx_recv);
526 __ verify_oop(rax_klass);
528 // get target methodOop & entry point
529 const int base = instanceKlass::vtable_start_offset() * wordSize;
530 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
531 Address vtable_entry_addr(rax_klass,
532 rbx_index, Address::times_ptr,
533 base + vtableEntry::method_offset_in_bytes());
534 Register rbx_method = rbx_temp;
535 __ movptr(rbx_method, vtable_entry_addr);
537 __ verify_oop(rbx_method);
538 __ jmp(rbx_method_fie);
539 }
540 break;
542 case _invokeinterface_mh:
543 {
544 // same as TemplateTable::invokeinterface,
545 // minus the CP setup and profiling:
547 // pick out the interface and itable index from the MH.
548 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
549 Register rdx_intf = rdx_temp;
550 Register rbx_index = rbx_temp;
551 __ load_heap_oop(rdx_intf, rcx_mh_vmtarget);
552 __ movl(rbx_index, rcx_dmh_vmindex);
553 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
554 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
556 // get receiver klass
557 Register rax_klass = rax_argslot;
558 __ load_klass(rax_klass, rcx_recv);
559 __ verify_oop(rax_klass);
561 Register rdi_temp = rdi;
562 Register rbx_method = rbx_index;
564 // get interface klass
565 Label no_such_interface;
566 __ verify_oop(rdx_intf);
567 __ lookup_interface_method(rax_klass, rdx_intf,
568 // note: next two args must be the same:
569 rbx_index, rbx_method,
570 rdi_temp,
571 no_such_interface);
573 __ verify_oop(rbx_method);
574 __ jmp(rbx_method_fie);
575 __ hlt();
577 __ bind(no_such_interface);
578 // Throw an exception.
579 // For historical reasons, it will be IncompatibleClassChangeError.
580 __ mov(rbx_temp, rcx_recv); // rarg2_required might be RCX
581 assert_different_registers(rarg2_required, rbx_temp);
582 __ movptr(rarg2_required, Address(rdx_intf, java_mirror_offset)); // required interface
583 __ mov( rarg1_actual, rbx_temp); // bad receiver
584 __ movl( rarg0_code, (int) Bytecodes::_invokeinterface); // who is complaining?
585 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
586 }
587 break;
589 case _bound_ref_mh:
590 case _bound_int_mh:
591 case _bound_long_mh:
592 case _bound_ref_direct_mh:
593 case _bound_int_direct_mh:
594 case _bound_long_direct_mh:
595 {
596 bool direct_to_method = (ek >= _bound_ref_direct_mh);
597 BasicType arg_type = T_ILLEGAL;
598 int arg_mask = _INSERT_NO_MASK;
599 int arg_slots = -1;
600 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
602 // make room for the new argument:
603 __ movl(rax_argslot, rcx_bmh_vmargslot);
604 __ lea(rax_argslot, __ argument_address(rax_argslot));
606 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, rax_argslot, rbx_temp, rdx_temp);
608 // store bound argument into the new stack slot:
609 __ load_heap_oop(rbx_temp, rcx_bmh_argument);
610 if (arg_type == T_OBJECT) {
611 __ movptr(Address(rax_argslot, 0), rbx_temp);
612 } else {
613 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
614 const int arg_size = type2aelembytes(arg_type);
615 __ load_sized_value(rdx_temp, prim_value_addr, arg_size, is_signed_subword_type(arg_type), rbx_temp);
616 __ store_sized_value(Address(rax_argslot, 0), rdx_temp, arg_size, rbx_temp);
617 }
619 if (direct_to_method) {
620 Register rbx_method = rbx_temp;
621 __ load_heap_oop(rbx_method, rcx_mh_vmtarget);
622 __ verify_oop(rbx_method);
623 __ jmp(rbx_method_fie);
624 } else {
625 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
626 __ verify_oop(rcx_recv);
627 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
628 }
629 }
630 break;
632 case _adapter_retype_only:
633 case _adapter_retype_raw:
634 // immediately jump to the next MH layer:
635 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
636 __ verify_oop(rcx_recv);
637 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
638 // This is OK when all parameter types widen.
639 // It is also OK when a return type narrows.
640 break;
642 case _adapter_check_cast:
643 {
644 // temps:
645 Register rbx_klass = rbx_temp; // interesting AMH data
647 // check a reference argument before jumping to the next layer of MH:
648 __ movl(rax_argslot, rcx_amh_vmargslot);
649 vmarg = __ argument_address(rax_argslot);
651 // What class are we casting to?
652 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
653 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
655 Label done;
656 __ movptr(rdx_temp, vmarg);
657 __ testptr(rdx_temp, rdx_temp);
658 __ jcc(Assembler::zero, done); // no cast if null
659 __ load_klass(rdx_temp, rdx_temp);
661 // live at this point:
662 // - rbx_klass: klass required by the target method
663 // - rdx_temp: argument klass to test
664 // - rcx_recv: adapter method handle
665 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
667 // If we get here, the type check failed!
668 // Call the wrong_method_type stub, passing the failing argument type in rax.
669 Register rax_mtype = rax_argslot;
670 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
671 __ movptr(rdx_temp, vmarg);
673 assert_different_registers(rarg2_required, rdx_temp);
674 __ load_heap_oop(rarg2_required, rcx_amh_argument); // required class
675 __ mov( rarg1_actual, rdx_temp); // bad object
676 __ movl( rarg0_code, (int) Bytecodes::_checkcast); // who is complaining?
677 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
679 __ bind(done);
680 // get the new MH:
681 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
682 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
683 }
684 break;
686 case _adapter_prim_to_prim:
687 case _adapter_ref_to_prim:
688 // handled completely by optimized cases
689 __ stop("init_AdapterMethodHandle should not issue this");
690 break;
692 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
693 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
694 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
695 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
696 {
697 // perform an in-place conversion to int or an int subword
698 __ movl(rax_argslot, rcx_amh_vmargslot);
699 vmarg = __ argument_address(rax_argslot);
701 switch (ek) {
702 case _adapter_opt_i2i:
703 __ movl(rdx_temp, vmarg);
704 break;
705 case _adapter_opt_l2i:
706 {
707 // just delete the extra slot; on a little-endian machine we keep the first
708 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
709 remove_arg_slots(_masm, -stack_move_unit(),
710 rax_argslot, rbx_temp, rdx_temp);
711 vmarg = Address(rax_argslot, -Interpreter::stackElementSize);
712 __ movl(rdx_temp, vmarg);
713 }
714 break;
715 case _adapter_opt_unboxi:
716 {
717 // Load the value up from the heap.
718 __ movptr(rdx_temp, vmarg);
719 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
720 #ifdef ASSERT
721 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
722 if (is_subword_type(BasicType(bt)))
723 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
724 }
725 #endif
726 __ null_check(rdx_temp, value_offset);
727 __ movl(rdx_temp, Address(rdx_temp, value_offset));
728 // We load this as a word. Because we are little-endian,
729 // the low bits will be correct, but the high bits may need cleaning.
730 // The vminfo will guide us to clean those bits.
731 }
732 break;
733 default:
734 ShouldNotReachHere();
735 }
737 // Do the requested conversion and store the value.
738 Register rbx_vminfo = rbx_temp;
739 __ movl(rbx_vminfo, rcx_amh_conversion);
740 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
742 // get the new MH:
743 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
744 // (now we are done with the old MH)
746 // original 32-bit vmdata word must be of this form:
747 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
748 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
749 __ shll(rdx_temp /*, rcx*/);
750 Label zero_extend, done;
751 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
752 __ jccb(Assembler::zero, zero_extend);
754 // this path is taken for int->byte, int->short
755 __ sarl(rdx_temp /*, rcx*/);
756 __ jmpb(done);
758 __ bind(zero_extend);
759 // this is taken for int->char
760 __ shrl(rdx_temp /*, rcx*/);
762 __ bind(done);
763 __ movl(vmarg, rdx_temp); // Store the value.
764 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
766 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
767 }
768 break;
770 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
771 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
772 {
773 // perform an in-place int-to-long or ref-to-long conversion
774 __ movl(rax_argslot, rcx_amh_vmargslot);
776 // on a little-endian machine we keep the first slot and add another after
777 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
778 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
779 rax_argslot, rbx_temp, rdx_temp);
780 Address vmarg1(rax_argslot, -Interpreter::stackElementSize);
781 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize);
783 switch (ek) {
784 case _adapter_opt_i2l:
785 {
786 #ifdef _LP64
787 __ movslq(rdx_temp, vmarg1); // Load sign-extended
788 __ movq(vmarg1, rdx_temp); // Store into first slot
789 #else
790 __ movl(rdx_temp, vmarg1);
791 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
792 __ movl(vmarg2, rdx_temp); // store second word
793 #endif
794 }
795 break;
796 case _adapter_opt_unboxl:
797 {
798 // Load the value up from the heap.
799 __ movptr(rdx_temp, vmarg1);
800 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
801 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
802 __ null_check(rdx_temp, value_offset);
803 #ifdef _LP64
804 __ movq(rbx_temp, Address(rdx_temp, value_offset));
805 __ movq(vmarg1, rbx_temp);
806 #else
807 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
808 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
809 __ movl(vmarg1, rbx_temp);
810 __ movl(vmarg2, rdx_temp);
811 #endif
812 }
813 break;
814 default:
815 ShouldNotReachHere();
816 }
818 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
819 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
820 }
821 break;
823 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
824 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
825 {
826 // perform an in-place floating primitive conversion
827 __ movl(rax_argslot, rcx_amh_vmargslot);
828 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
829 if (ek == _adapter_opt_f2d) {
830 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
831 rax_argslot, rbx_temp, rdx_temp);
832 }
833 Address vmarg(rax_argslot, -Interpreter::stackElementSize);
835 #ifdef _LP64
836 if (ek == _adapter_opt_f2d) {
837 __ movflt(xmm0, vmarg);
838 __ cvtss2sd(xmm0, xmm0);
839 __ movdbl(vmarg, xmm0);
840 } else {
841 __ movdbl(xmm0, vmarg);
842 __ cvtsd2ss(xmm0, xmm0);
843 __ movflt(vmarg, xmm0);
844 }
845 #else //_LP64
846 if (ek == _adapter_opt_f2d) {
847 __ fld_s(vmarg); // load float to ST0
848 __ fstp_s(vmarg); // store single
849 } else {
850 __ fld_d(vmarg); // load double to ST0
851 __ fstp_s(vmarg); // store single
852 }
853 #endif //_LP64
855 if (ek == _adapter_opt_d2f) {
856 remove_arg_slots(_masm, -stack_move_unit(),
857 rax_argslot, rbx_temp, rdx_temp);
858 }
860 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
861 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
862 }
863 break;
865 case _adapter_prim_to_ref:
866 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
867 break;
869 case _adapter_swap_args:
870 case _adapter_rot_args:
871 // handled completely by optimized cases
872 __ stop("init_AdapterMethodHandle should not issue this");
873 break;
875 case _adapter_opt_swap_1:
876 case _adapter_opt_swap_2:
877 case _adapter_opt_rot_1_up:
878 case _adapter_opt_rot_1_down:
879 case _adapter_opt_rot_2_up:
880 case _adapter_opt_rot_2_down:
881 {
882 int swap_bytes = 0, rotate = 0;
883 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
885 // 'argslot' is the position of the first argument to swap
886 __ movl(rax_argslot, rcx_amh_vmargslot);
887 __ lea(rax_argslot, __ argument_address(rax_argslot));
889 // 'vminfo' is the second
890 Register rbx_destslot = rbx_temp;
891 __ movl(rbx_destslot, rcx_amh_conversion);
892 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
893 __ andl(rbx_destslot, CONV_VMINFO_MASK);
894 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
895 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
897 if (!rotate) {
898 for (int i = 0; i < swap_bytes; i += wordSize) {
899 __ movptr(rdx_temp, Address(rax_argslot , i));
900 __ push(rdx_temp);
901 __ movptr(rdx_temp, Address(rbx_destslot, i));
902 __ movptr(Address(rax_argslot, i), rdx_temp);
903 __ pop(rdx_temp);
904 __ movptr(Address(rbx_destslot, i), rdx_temp);
905 }
906 } else {
907 // push the first chunk, which is going to get overwritten
908 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
909 __ movptr(rdx_temp, Address(rax_argslot, i));
910 __ push(rdx_temp);
911 }
913 if (rotate > 0) {
914 // rotate upward
915 __ subptr(rax_argslot, swap_bytes);
916 #ifdef ASSERT
917 {
918 // Verify that argslot > destslot, by at least swap_bytes.
919 Label L_ok;
920 __ cmpptr(rax_argslot, rbx_destslot);
921 __ jccb(Assembler::aboveEqual, L_ok);
922 __ stop("source must be above destination (upward rotation)");
923 __ bind(L_ok);
924 }
925 #endif
926 // work argslot down to destslot, copying contiguous data upwards
927 // pseudo-code:
928 // rax = src_addr - swap_bytes
929 // rbx = dest_addr
930 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
931 Label loop;
932 __ bind(loop);
933 __ movptr(rdx_temp, Address(rax_argslot, 0));
934 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
935 __ addptr(rax_argslot, -wordSize);
936 __ cmpptr(rax_argslot, rbx_destslot);
937 __ jccb(Assembler::aboveEqual, loop);
938 } else {
939 __ addptr(rax_argslot, swap_bytes);
940 #ifdef ASSERT
941 {
942 // Verify that argslot < destslot, by at least swap_bytes.
943 Label L_ok;
944 __ cmpptr(rax_argslot, rbx_destslot);
945 __ jccb(Assembler::belowEqual, L_ok);
946 __ stop("source must be below destination (downward rotation)");
947 __ bind(L_ok);
948 }
949 #endif
950 // work argslot up to destslot, copying contiguous data downwards
951 // pseudo-code:
952 // rax = src_addr + swap_bytes
953 // rbx = dest_addr
954 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
955 Label loop;
956 __ bind(loop);
957 __ movptr(rdx_temp, Address(rax_argslot, 0));
958 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
959 __ addptr(rax_argslot, wordSize);
960 __ cmpptr(rax_argslot, rbx_destslot);
961 __ jccb(Assembler::belowEqual, loop);
962 }
964 // pop the original first chunk into the destination slot, now free
965 for (int i = 0; i < swap_bytes; i += wordSize) {
966 __ pop(rdx_temp);
967 __ movptr(Address(rbx_destslot, i), rdx_temp);
968 }
969 }
971 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
972 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
973 }
974 break;
976 case _adapter_dup_args:
977 {
978 // 'argslot' is the position of the first argument to duplicate
979 __ movl(rax_argslot, rcx_amh_vmargslot);
980 __ lea(rax_argslot, __ argument_address(rax_argslot));
982 // 'stack_move' is negative number of words to duplicate
983 Register rdx_stack_move = rdx_temp;
984 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
985 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
987 int argslot0_num = 0;
988 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
989 assert(argslot0.base() == rsp, "");
990 int pre_arg_size = argslot0.disp();
991 assert(pre_arg_size % wordSize == 0, "");
992 assert(pre_arg_size > 0, "must include PC");
994 // remember the old rsp+1 (argslot[0])
995 Register rbx_oldarg = rbx_temp;
996 __ lea(rbx_oldarg, argslot0);
998 // move rsp down to make room for dups
999 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
1001 // compute the new rsp+1 (argslot[0])
1002 Register rdx_newarg = rdx_temp;
1003 __ lea(rdx_newarg, argslot0);
1005 __ push(rdi); // need a temp
1006 // (preceding push must be done after arg addresses are taken!)
1008 // pull down the pre_arg_size data (PC)
1009 for (int i = -pre_arg_size; i < 0; i += wordSize) {
1010 __ movptr(rdi, Address(rbx_oldarg, i));
1011 __ movptr(Address(rdx_newarg, i), rdi);
1012 }
1014 // copy from rax_argslot[0...] down to new_rsp[1...]
1015 // pseudo-code:
1016 // rbx = old_rsp+1
1017 // rdx = new_rsp+1
1018 // rax = argslot
1019 // while (rdx < rbx) *rdx++ = *rax++
1020 Label loop;
1021 __ bind(loop);
1022 __ movptr(rdi, Address(rax_argslot, 0));
1023 __ movptr(Address(rdx_newarg, 0), rdi);
1024 __ addptr(rax_argslot, wordSize);
1025 __ addptr(rdx_newarg, wordSize);
1026 __ cmpptr(rdx_newarg, rbx_oldarg);
1027 __ jccb(Assembler::less, loop);
1029 __ pop(rdi); // restore temp
1031 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1032 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1033 }
1034 break;
1036 case _adapter_drop_args:
1037 {
1038 // 'argslot' is the position of the first argument to nuke
1039 __ movl(rax_argslot, rcx_amh_vmargslot);
1040 __ lea(rax_argslot, __ argument_address(rax_argslot));
1042 __ push(rdi); // need a temp
1043 // (must do previous push after argslot address is taken)
1045 // 'stack_move' is number of words to drop
1046 Register rdi_stack_move = rdi;
1047 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1048 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1049 remove_arg_slots(_masm, rdi_stack_move,
1050 rax_argslot, rbx_temp, rdx_temp);
1052 __ pop(rdi); // restore temp
1054 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1055 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1056 }
1057 break;
1059 case _adapter_collect_args:
1060 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1061 break;
1063 case _adapter_spread_args:
1064 // handled completely by optimized cases
1065 __ stop("init_AdapterMethodHandle should not issue this");
1066 break;
1068 case _adapter_opt_spread_0:
1069 case _adapter_opt_spread_1:
1070 case _adapter_opt_spread_more:
1071 {
1072 // spread an array out into a group of arguments
1073 int length_constant = get_ek_adapter_opt_spread_info(ek);
1075 // find the address of the array argument
1076 __ movl(rax_argslot, rcx_amh_vmargslot);
1077 __ lea(rax_argslot, __ argument_address(rax_argslot));
1079 // grab some temps
1080 { __ push(rsi); __ push(rdi); }
1081 // (preceding pushes must be done after argslot address is taken!)
1082 #define UNPUSH_RSI_RDI \
1083 { __ pop(rdi); __ pop(rsi); }
1085 // arx_argslot points both to the array and to the first output arg
1086 vmarg = Address(rax_argslot, 0);
1088 // Get the array value.
1089 Register rsi_array = rsi;
1090 Register rdx_array_klass = rdx_temp;
1091 BasicType elem_type = T_OBJECT;
1092 int length_offset = arrayOopDesc::length_offset_in_bytes();
1093 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1094 __ movptr(rsi_array, vmarg);
1095 Label skip_array_check;
1096 if (length_constant == 0) {
1097 __ testptr(rsi_array, rsi_array);
1098 __ jcc(Assembler::zero, skip_array_check);
1099 }
1100 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1101 __ load_klass(rdx_array_klass, rsi_array);
1103 // Check the array type.
1104 Register rbx_klass = rbx_temp;
1105 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
1106 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1108 Label ok_array_klass, bad_array_klass, bad_array_length;
1109 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1110 // If we get here, the type check failed!
1111 __ jmp(bad_array_klass);
1112 __ bind(ok_array_klass);
1114 // Check length.
1115 if (length_constant >= 0) {
1116 __ cmpl(Address(rsi_array, length_offset), length_constant);
1117 } else {
1118 Register rbx_vminfo = rbx_temp;
1119 __ movl(rbx_vminfo, rcx_amh_conversion);
1120 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1121 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1122 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1123 }
1124 __ jcc(Assembler::notEqual, bad_array_length);
1126 Register rdx_argslot_limit = rdx_temp;
1128 // Array length checks out. Now insert any required stack slots.
1129 if (length_constant == -1) {
1130 // Form a pointer to the end of the affected region.
1131 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize));
1132 // 'stack_move' is negative number of words to insert
1133 Register rdi_stack_move = rdi;
1134 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1135 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1136 Register rsi_temp = rsi_array; // spill this
1137 insert_arg_slots(_masm, rdi_stack_move, -1,
1138 rax_argslot, rbx_temp, rsi_temp);
1139 // reload the array (since rsi was killed)
1140 __ movptr(rsi_array, vmarg);
1141 } else if (length_constant > 1) {
1142 int arg_mask = 0;
1143 int new_slots = (length_constant - 1);
1144 for (int i = 0; i < new_slots; i++) {
1145 arg_mask <<= 1;
1146 arg_mask |= _INSERT_REF_MASK;
1147 }
1148 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1149 rax_argslot, rbx_temp, rdx_temp);
1150 } else if (length_constant == 1) {
1151 // no stack resizing required
1152 } else if (length_constant == 0) {
1153 remove_arg_slots(_masm, -stack_move_unit(),
1154 rax_argslot, rbx_temp, rdx_temp);
1155 }
1157 // Copy from the array to the new slots.
1158 // Note: Stack change code preserves integrity of rax_argslot pointer.
1159 // So even after slot insertions, rax_argslot still points to first argument.
1160 if (length_constant == -1) {
1161 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1162 Register rsi_source = rsi_array;
1163 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1164 Label loop;
1165 __ bind(loop);
1166 __ movptr(rbx_temp, Address(rsi_source, 0));
1167 __ movptr(Address(rax_argslot, 0), rbx_temp);
1168 __ addptr(rsi_source, type2aelembytes(elem_type));
1169 __ addptr(rax_argslot, Interpreter::stackElementSize);
1170 __ cmpptr(rax_argslot, rdx_argslot_limit);
1171 __ jccb(Assembler::less, loop);
1172 } else if (length_constant == 0) {
1173 __ bind(skip_array_check);
1174 // nothing to copy
1175 } else {
1176 int elem_offset = elem0_offset;
1177 int slot_offset = 0;
1178 for (int index = 0; index < length_constant; index++) {
1179 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1180 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1181 elem_offset += type2aelembytes(elem_type);
1182 slot_offset += Interpreter::stackElementSize;
1183 }
1184 }
1186 // Arguments are spread. Move to next method handle.
1187 UNPUSH_RSI_RDI;
1188 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1189 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1191 __ bind(bad_array_klass);
1192 UNPUSH_RSI_RDI;
1193 assert(!vmarg.uses(rarg2_required), "must be different registers");
1194 __ movptr(rarg2_required, Address(rdx_array_klass, java_mirror_offset)); // required type
1195 __ movptr(rarg1_actual, vmarg); // bad array
1196 __ movl( rarg0_code, (int) Bytecodes::_aaload); // who is complaining?
1197 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1199 __ bind(bad_array_length);
1200 UNPUSH_RSI_RDI;
1201 assert(!vmarg.uses(rarg2_required), "must be different registers");
1202 __ mov (rarg2_required, rcx_recv); // AMH requiring a certain length
1203 __ movptr(rarg1_actual, vmarg); // bad array
1204 __ movl( rarg0_code, (int) Bytecodes::_arraylength); // who is complaining?
1205 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1207 #undef UNPUSH_RSI_RDI
1208 }
1209 break;
1211 case _adapter_flyby:
1212 case _adapter_ricochet:
1213 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1214 break;
1216 default: ShouldNotReachHere();
1217 }
1218 __ hlt();
1220 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1221 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1223 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1224 }