1 /*
2 * Copyright (c) 2008, 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
73 // Code generation
74 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
75 // I5_savedSP: sender SP (must preserve)
76 // G4 (Gargs): incoming argument list (must preserve)
77 // G5_method: invoke methodOop; becomes method type.
78 // G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
79 // O0, O1: garbage temps, blown away
80 Register O0_argslot = O0;
81 Register O1_scratch = O1;
82
83 // emit WrongMethodType path first, to enable back-branch from main path
84 Label wrong_method_type;
85 __ bind(wrong_method_type);
86 __ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
87 __ delayed()->nop();
88
89 // here's where control starts out:
90 __ align(CodeEntryAlignment);
91 address entry_point = __ pc();
92
93 // fetch the MethodType from the method handle into G5_method_type
94 {
95 Register tem = G5_method;
96 assert(tem == G5_method_type, "yes, it's the same register");
97 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
98 __ ld_ptr(Address(tem, *pchase), G5_method_type);
99 }
100 }
101
102 // given the MethodType, find out where the MH argument is buried
103 __ load_heap_oop(Address(G5_method_type, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, O1_scratch)), O0_argslot);
104 __ ldsw( Address(O0_argslot, __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O0_argslot);
105 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
106
107 __ check_method_handle_type(G5_method_type, G3_method_handle, O1_scratch, wrong_method_type);
108 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
109
110 return entry_point;
111 }
112
113
114 #ifdef ASSERT
115 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
116 // Verify that argslot lies within (Gargs, FP].
117 Label L_ok, L_bad;
118 BLOCK_COMMENT("{ verify_argslot");
119 #ifdef _LP64
120 __ add(FP, STACK_BIAS, temp_reg);
121 __ cmp(argslot_reg, temp_reg);
122 #else
123 __ cmp(argslot_reg, FP);
124 #endif
125 __ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
126 __ delayed()->nop();
127 __ cmp(Gargs, argslot_reg);
128 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
129 __ delayed()->nop();
130 __ bind(L_bad);
131 __ stop(error_message);
132 __ bind(L_ok);
133 BLOCK_COMMENT("} verify_argslot");
134 }
135 #endif
136
137
138 // Helper to insert argument slots into the stack.
139 // arg_slots must be a multiple of stack_move_unit() and <= 0
140 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
141 RegisterOrConstant arg_slots,
142 int arg_mask,
143 Register argslot_reg,
144 Register temp_reg, Register temp2_reg, Register temp3_reg) {
145 assert(temp3_reg != noreg, "temp3 required");
146 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
147 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
148
149 #ifdef ASSERT
150 verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
151 if (arg_slots.is_register()) {
152 Label L_ok, L_bad;
153 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
154 __ br(Assembler::greater, false, Assembler::pn, L_bad);
155 __ delayed()->nop();
156 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
157 __ br(Assembler::zero, false, Assembler::pt, L_ok);
158 __ delayed()->nop();
159 __ bind(L_bad);
160 __ stop("assert arg_slots <= 0 and clear low bits");
161 __ bind(L_ok);
162 } else {
163 assert(arg_slots.as_constant() <= 0, "");
164 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
165 }
166 #endif // ASSERT
167
168 #ifdef _LP64
169 if (arg_slots.is_register()) {
170 // Was arg_slots register loaded as signed int?
171 Label L_ok;
172 __ sll(arg_slots.as_register(), BitsPerInt, temp_reg);
173 __ sra(temp_reg, BitsPerInt, temp_reg);
174 __ cmp(arg_slots.as_register(), temp_reg);
175 __ br(Assembler::equal, false, Assembler::pt, L_ok);
176 __ delayed()->nop();
177 __ stop("arg_slots register not loaded as signed int");
178 __ bind(L_ok);
179 }
180 #endif
181
182 // Make space on the stack for the inserted argument(s).
183 // Then pull down everything shallower than argslot_reg.
184 // The stacked return address gets pulled down with everything else.
185 // That is, copy [sp, argslot) downward by -size words. In pseudo-code:
186 // sp -= size;
187 // for (temp = sp + size; temp < argslot; temp++)
188 // temp[-size] = temp[0]
189 // argslot -= size;
190 BLOCK_COMMENT("insert_arg_slots {");
191 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
192
193 // Keep the stack pointer 2*wordSize aligned.
194 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
195 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
196 __ add(SP, masked_offset, SP);
197
198 __ mov(Gargs, temp_reg); // source pointer for copy
199 __ add(Gargs, offset, Gargs);
200
201 {
202 Label loop;
203 __ BIND(loop);
204 // pull one word down each time through the loop
205 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
206 __ st_ptr(temp2_reg, Address(temp_reg, offset));
207 __ add(temp_reg, wordSize, temp_reg);
208 __ cmp(temp_reg, argslot_reg);
209 __ brx(Assembler::less, false, Assembler::pt, loop);
210 __ delayed()->nop(); // FILLME
211 }
212
213 // Now move the argslot down, to point to the opened-up space.
214 __ add(argslot_reg, offset, argslot_reg);
215 BLOCK_COMMENT("} insert_arg_slots");
216 }
217
218
219 // Helper to remove argument slots from the stack.
220 // arg_slots must be a multiple of stack_move_unit() and >= 0
221 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
222 RegisterOrConstant arg_slots,
223 Register argslot_reg,
224 Register temp_reg, Register temp2_reg, Register temp3_reg) {
225 assert(temp3_reg != noreg, "temp3 required");
226 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
227 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
228
229 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
230
231 #ifdef ASSERT
232 // Verify that [argslot..argslot+size) lies within (Gargs, FP).
233 __ add(argslot_reg, offset, temp2_reg);
234 verify_argslot(_masm, temp2_reg, temp_reg, "deleted argument(s) must fall within current frame");
235 if (arg_slots.is_register()) {
236 Label L_ok, L_bad;
237 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
238 __ br(Assembler::less, false, Assembler::pn, L_bad);
239 __ delayed()->nop();
240 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
241 __ br(Assembler::zero, false, Assembler::pt, L_ok);
242 __ delayed()->nop();
243 __ bind(L_bad);
244 __ stop("assert arg_slots >= 0 and clear low bits");
245 __ bind(L_ok);
246 } else {
247 assert(arg_slots.as_constant() >= 0, "");
248 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
249 }
250 #endif // ASSERT
251
252 BLOCK_COMMENT("remove_arg_slots {");
253 // Pull up everything shallower than argslot.
254 // Then remove the excess space on the stack.
255 // The stacked return address gets pulled up with everything else.
256 // That is, copy [sp, argslot) upward by size words. In pseudo-code:
257 // for (temp = argslot-1; temp >= sp; --temp)
258 // temp[size] = temp[0]
259 // argslot += size;
260 // sp += size;
261 __ sub(argslot_reg, wordSize, temp_reg); // source pointer for copy
262 {
263 Label loop;
264 __ BIND(loop);
265 // pull one word up each time through the loop
266 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
267 __ st_ptr(temp2_reg, Address(temp_reg, offset));
268 __ sub(temp_reg, wordSize, temp_reg);
269 __ cmp(temp_reg, Gargs);
270 __ brx(Assembler::greaterEqual, false, Assembler::pt, loop);
271 __ delayed()->nop(); // FILLME
272 }
273
274 // Now move the argslot up, to point to the just-copied block.
275 __ add(Gargs, offset, Gargs);
276 // And adjust the argslot address to point at the deletion point.
277 __ add(argslot_reg, offset, argslot_reg);
278
279 // Keep the stack pointer 2*wordSize aligned.
280 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
281 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
282 __ add(SP, masked_offset, SP);
283 BLOCK_COMMENT("} remove_arg_slots");
284 }
285
286
287 #ifndef PRODUCT
288 extern "C" void print_method_handle(oop mh);
289 void trace_method_handle_stub(const char* adaptername,
290 oopDesc* mh) {
291 printf("MH %s mh="INTPTR_FORMAT"\n", adaptername, (intptr_t) mh);
292 print_method_handle(mh);
293 }
294 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
295 if (!TraceMethodHandles) return;
296 BLOCK_COMMENT("trace_method_handle {");
297 // save: Gargs, O5_savedSP
298 __ save_frame(16);
299 __ set((intptr_t) adaptername, O0);
300 __ mov(G3_method_handle, O1);
301 __ mov(G3_method_handle, L3);
302 __ mov(Gargs, L4);
303 __ mov(G5_method_type, L5);
304 __ call_VM_leaf(L7, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
305
306 __ mov(L3, G3_method_handle);
307 __ mov(L4, Gargs);
308 __ mov(L5, G5_method_type);
309 __ restore();
310 BLOCK_COMMENT("} trace_method_handle");
311 }
312 #endif // PRODUCT
313
314 // which conversion op types are implemented here?
315 int MethodHandles::adapter_conversion_ops_supported_mask() {
316 return ((1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
317 |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
318 |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
319 |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
320 |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
321 |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
322 |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
323 |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
324 |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
325 //|(1<<sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
326 );
327 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
328 }
329
330 //------------------------------------------------------------------------------
331 // MethodHandles::generate_method_handle_stub
332 //
333 // Generate an "entry" field for a method handle.
334 // This determines how the method handle will respond to calls.
335 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
336 // Here is the register state during an interpreted call,
337 // as set up by generate_method_handle_interpreter_entry():
338 // - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
339 // - G3: receiver method handle
340 // - O5_savedSP: sender SP (must preserve)
341
342 Register O0_argslot = O0;
343 Register O1_scratch = O1;
344 Register O2_scratch = O2;
345 Register O3_scratch = O3;
346 Register G5_index = G5;
347
348 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
349
350 // Some handy addresses:
351 Address G5_method_fie( G5_method, in_bytes(methodOopDesc::from_interpreted_offset()));
352
353 Address G3_mh_vmtarget( G3_method_handle, java_dyn_MethodHandle::vmtarget_offset_in_bytes());
354
355 Address G3_dmh_vmindex( G3_method_handle, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes());
356
357 Address G3_bmh_vmargslot( G3_method_handle, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes());
358 Address G3_bmh_argument( G3_method_handle, sun_dyn_BoundMethodHandle::argument_offset_in_bytes());
359
360 Address G3_amh_vmargslot( G3_method_handle, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes());
361 Address G3_amh_argument ( G3_method_handle, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes());
362 Address G3_amh_conversion(G3_method_handle, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes());
363
364 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
365
366 if (have_entry(ek)) {
367 __ nop(); // empty stubs make SG sick
368 return;
369 }
370
371 address interp_entry = __ pc();
372
373 trace_method_handle(_masm, entry_name(ek));
374
375 switch ((int) ek) {
376 case _raise_exception:
377 {
378 // Not a real MH entry, but rather shared code for raising an
379 // exception. Extra local arguments are passed in scratch
380 // registers, as required type in O3, failing object (or NULL)
381 // in O2, failing bytecode type in O1.
382
383 __ mov(O5_savedSP, SP); // Cut the stack back to where the caller started.
384
385 // Push arguments as if coming from the interpreter.
386 Register O0_scratch = O0_argslot;
387 int stackElementSize = Interpreter::stackElementSize;
388
389 // Make space on the stack for the arguments and set Gargs
390 // correctly.
391 __ sub(SP, 4*stackElementSize, SP); // Keep stack aligned.
392 __ add(SP, (frame::varargs_offset)*wordSize - 1*Interpreter::stackElementSize + STACK_BIAS + BytesPerWord, Gargs);
393
394 // void raiseException(int code, Object actual, Object required)
395 __ st( O1_scratch, Address(Gargs, 2*stackElementSize)); // code
396 __ st_ptr(O2_scratch, Address(Gargs, 1*stackElementSize)); // actual
397 __ st_ptr(O3_scratch, Address(Gargs, 0*stackElementSize)); // required
398
399 Label no_method;
400 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
401 __ set(AddressLiteral((address) &_raise_exception_method), G5_method);
402 __ ld_ptr(Address(G5_method, 0), G5_method);
403 __ tst(G5_method);
404 __ brx(Assembler::zero, false, Assembler::pn, no_method);
405 __ delayed()->nop();
406
407 int jobject_oop_offset = 0;
408 __ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
409 __ tst(G5_method);
410 __ brx(Assembler::zero, false, Assembler::pn, no_method);
411 __ delayed()->nop();
412
413 __ verify_oop(G5_method);
414 __ jump_indirect_to(G5_method_fie, O1_scratch);
415 __ delayed()->nop();
416
417 // If we get here, the Java runtime did not do its job of creating the exception.
418 // Do something that is at least causes a valid throw from the interpreter.
419 __ bind(no_method);
420 __ unimplemented("_raise_exception no method");
421 }
422 break;
423
424 case _invokestatic_mh:
425 case _invokespecial_mh:
426 {
427 __ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
428 __ verify_oop(G5_method);
429 // Same as TemplateTable::invokestatic or invokespecial,
430 // minus the CP setup and profiling:
431 if (ek == _invokespecial_mh) {
432 // Must load & check the first argument before entering the target method.
433 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
434 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
435 __ null_check(G3_method_handle);
436 __ verify_oop(G3_method_handle);
437 }
438 __ jump_indirect_to(G5_method_fie, O1_scratch);
439 __ delayed()->nop();
440 }
441 break;
442
443 case _invokevirtual_mh:
444 {
445 // Same as TemplateTable::invokevirtual,
446 // minus the CP setup and profiling:
447
448 // Pick out the vtable index and receiver offset from the MH,
449 // and then we can discard it:
450 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
451 __ ldsw(G3_dmh_vmindex, G5_index);
452 // Note: The verifier allows us to ignore G3_mh_vmtarget.
453 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
454 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
455
456 // Get receiver klass:
457 Register O0_klass = O0_argslot;
458 __ load_klass(G3_method_handle, O0_klass);
459 __ verify_oop(O0_klass);
460
461 // Get target methodOop & entry point:
462 const int base = instanceKlass::vtable_start_offset() * wordSize;
463 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
464
465 __ sll_ptr(G5_index, LogBytesPerWord, G5_index);
466 __ add(O0_klass, G5_index, O0_klass);
467 Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
468 __ ld_ptr(vtable_entry_addr, G5_method);
469
470 __ verify_oop(G5_method);
471 __ jump_indirect_to(G5_method_fie, O1_scratch);
472 __ delayed()->nop();
473 }
474 break;
475
476 case _invokeinterface_mh:
477 {
478 // Same as TemplateTable::invokeinterface,
479 // minus the CP setup and profiling:
480 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
481 Register O1_intf = O1_scratch;
482 __ load_heap_oop(G3_mh_vmtarget, O1_intf);
483 __ ldsw(G3_dmh_vmindex, G5_index);
484 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
485 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
486
487 // Get receiver klass:
488 Register O0_klass = O0_argslot;
489 __ load_klass(G3_method_handle, O0_klass);
490 __ verify_oop(O0_klass);
491
492 // Get interface:
493 Label no_such_interface;
494 __ verify_oop(O1_intf);
495 __ lookup_interface_method(O0_klass, O1_intf,
496 // Note: next two args must be the same:
497 G5_index, G5_method,
498 O2_scratch,
499 O3_scratch,
500 no_such_interface);
501
502 __ verify_oop(G5_method);
503 __ jump_indirect_to(G5_method_fie, O1_scratch);
504 __ delayed()->nop();
505
506 __ bind(no_such_interface);
507 // Throw an exception.
508 // For historical reasons, it will be IncompatibleClassChangeError.
509 __ unimplemented("not tested yet");
510 __ ld_ptr(Address(O1_intf, java_mirror_offset), O3_scratch); // required interface
511 __ mov(O0_klass, O2_scratch); // bad receiver
512 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
513 __ delayed()->mov(Bytecodes::_invokeinterface, O1_scratch); // who is complaining?
514 }
515 break;
516
517 case _bound_ref_mh:
518 case _bound_int_mh:
519 case _bound_long_mh:
520 case _bound_ref_direct_mh:
521 case _bound_int_direct_mh:
522 case _bound_long_direct_mh:
523 {
524 const bool direct_to_method = (ek >= _bound_ref_direct_mh);
525 BasicType arg_type = T_ILLEGAL;
526 int arg_mask = _INSERT_NO_MASK;
527 int arg_slots = -1;
528 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
529
530 // Make room for the new argument:
531 __ ldsw(G3_bmh_vmargslot, O0_argslot);
532 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
533
534 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, O0_argslot, O1_scratch, O2_scratch, G5_index);
535
536 // Store bound argument into the new stack slot:
537 __ load_heap_oop(G3_bmh_argument, O1_scratch);
538 if (arg_type == T_OBJECT) {
539 __ st_ptr(O1_scratch, Address(O0_argslot, 0));
540 } else {
541 Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
542 __ load_sized_value(prim_value_addr, O2_scratch, type2aelembytes(arg_type), is_signed_subword_type(arg_type));
543 if (arg_slots == 2) {
544 __ unimplemented("not yet tested");
545 #ifndef _LP64
546 __ signx(O2_scratch, O3_scratch); // Sign extend
547 #endif
548 __ st_long(O2_scratch, Address(O0_argslot, 0)); // Uses O2/O3 on !_LP64
549 } else {
550 __ st_ptr( O2_scratch, Address(O0_argslot, 0));
551 }
552 }
553
554 if (direct_to_method) {
555 __ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
556 __ verify_oop(G5_method);
557 __ jump_indirect_to(G5_method_fie, O1_scratch);
558 __ delayed()->nop();
559 } else {
560 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
561 __ verify_oop(G3_method_handle);
562 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
563 }
564 }
565 break;
566
567 case _adapter_retype_only:
568 case _adapter_retype_raw:
569 // Immediately jump to the next MH layer:
570 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
571 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
572 // This is OK when all parameter types widen.
573 // It is also OK when a return type narrows.
574 break;
575
576 case _adapter_check_cast:
577 {
578 // Temps:
579 Register G5_klass = G5_index; // Interesting AMH data.
580
581 // Check a reference argument before jumping to the next layer of MH:
582 __ ldsw(G3_amh_vmargslot, O0_argslot);
583 Address vmarg = __ argument_address(O0_argslot);
584
585 // What class are we casting to?
586 __ load_heap_oop(G3_amh_argument, G5_klass); // This is a Class object!
587 __ load_heap_oop(Address(G5_klass, java_lang_Class::klass_offset_in_bytes()), G5_klass);
588
589 Label done;
590 __ ld_ptr(vmarg, O1_scratch);
591 __ tst(O1_scratch);
592 __ brx(Assembler::zero, false, Assembler::pn, done); // No cast if null.
593 __ delayed()->nop();
594 __ load_klass(O1_scratch, O1_scratch);
595
596 // Live at this point:
597 // - G5_klass : klass required by the target method
598 // - O1_scratch : argument klass to test
599 // - G3_method_handle: adapter method handle
600 __ check_klass_subtype(O1_scratch, G5_klass, O0_argslot, O2_scratch, done);
601
602 // If we get here, the type check failed!
603 __ ldsw(G3_amh_vmargslot, O0_argslot); // reload argslot field
604 __ load_heap_oop(G3_amh_argument, O3_scratch); // required class
605 __ ld_ptr(vmarg, O2_scratch); // bad object
606 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
607 __ delayed()->mov(Bytecodes::_checkcast, O1_scratch); // who is complaining?
608
609 __ bind(done);
610 // Get the new MH:
611 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
612 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
613 }
614 break;
615
616 case _adapter_prim_to_prim:
617 case _adapter_ref_to_prim:
618 // Handled completely by optimized cases.
619 __ stop("init_AdapterMethodHandle should not issue this");
620 break;
621
622 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
623 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
624 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
625 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
626 {
627 // Perform an in-place conversion to int or an int subword.
628 __ ldsw(G3_amh_vmargslot, O0_argslot);
629 Address vmarg = __ argument_address(O0_argslot);
630 Address value;
631 bool value_left_justified = false;
632
633 switch (ek) {
634 case _adapter_opt_i2i:
635 case _adapter_opt_l2i:
636 __ unimplemented(entry_name(ek));
637 value = vmarg;
638 break;
639 case _adapter_opt_unboxi:
640 {
641 // Load the value up from the heap.
642 __ ld_ptr(vmarg, O1_scratch);
643 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
644 #ifdef ASSERT
645 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
646 if (is_subword_type(BasicType(bt)))
647 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
648 }
649 #endif
650 __ null_check(O1_scratch, value_offset);
651 value = Address(O1_scratch, value_offset);
652 #ifdef _BIG_ENDIAN
653 // Values stored in objects are packed.
654 value_left_justified = true;
655 #endif
656 }
657 break;
658 default:
659 ShouldNotReachHere();
660 }
661
662 // This check is required on _BIG_ENDIAN
663 Register G5_vminfo = G5_index;
664 __ ldsw(G3_amh_conversion, G5_vminfo);
665 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
666
667 // Original 32-bit vmdata word must be of this form:
668 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
669 __ lduw(value, O1_scratch);
670 if (!value_left_justified)
671 __ sll(O1_scratch, G5_vminfo, O1_scratch);
672 Label zero_extend, done;
673 __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
674 __ br(Assembler::zero, false, Assembler::pn, zero_extend);
675 __ delayed()->nop();
676
677 // this path is taken for int->byte, int->short
678 __ sra(O1_scratch, G5_vminfo, O1_scratch);
679 __ ba(false, done);
680 __ delayed()->nop();
681
682 __ bind(zero_extend);
683 // this is taken for int->char
684 __ srl(O1_scratch, G5_vminfo, O1_scratch);
685
686 __ bind(done);
687 __ st(O1_scratch, vmarg);
688
689 // Get the new MH:
690 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
691 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
692 }
693 break;
694
695 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
696 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
697 {
698 // Perform an in-place int-to-long or ref-to-long conversion.
699 __ ldsw(G3_amh_vmargslot, O0_argslot);
700
701 // On big-endian machine we duplicate the slot and store the MSW
702 // in the first slot.
703 __ add(Gargs, __ argument_offset(O0_argslot, 1), O0_argslot);
704
705 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK, O0_argslot, O1_scratch, O2_scratch, G5_index);
706
707 Address arg_lsw(O0_argslot, 0);
708 Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
709
710 switch (ek) {
711 case _adapter_opt_i2l:
712 {
713 __ ldsw(arg_lsw, O2_scratch); // Load LSW
714 #ifndef _LP64
715 __ signx(O2_scratch, O3_scratch); // Sign extend
716 #endif
717 __ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
718 }
719 break;
720 case _adapter_opt_unboxl:
721 {
722 // Load the value up from the heap.
723 __ ld_ptr(arg_lsw, O1_scratch);
724 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
725 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
726 __ null_check(O1_scratch, value_offset);
727 __ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
728 __ st_long(O2_scratch, arg_msw);
729 }
730 break;
731 default:
732 ShouldNotReachHere();
733 }
734
735 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
736 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
737 }
738 break;
739
740 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
741 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
742 {
743 // perform an in-place floating primitive conversion
744 __ unimplemented(entry_name(ek));
745 }
746 break;
747
748 case _adapter_prim_to_ref:
749 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
750 break;
751
752 case _adapter_swap_args:
753 case _adapter_rot_args:
754 // handled completely by optimized cases
755 __ stop("init_AdapterMethodHandle should not issue this");
756 break;
757
758 case _adapter_opt_swap_1:
759 case _adapter_opt_swap_2:
760 case _adapter_opt_rot_1_up:
761 case _adapter_opt_rot_1_down:
762 case _adapter_opt_rot_2_up:
763 case _adapter_opt_rot_2_down:
764 {
765 int swap_bytes = 0, rotate = 0;
766 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
767
768 // 'argslot' is the position of the first argument to swap.
769 __ ldsw(G3_amh_vmargslot, O0_argslot);
770 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
771
772 // 'vminfo' is the second.
773 Register O1_destslot = O1_scratch;
774 __ ldsw(G3_amh_conversion, O1_destslot);
775 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
776 __ and3(O1_destslot, CONV_VMINFO_MASK, O1_destslot);
777 __ add(Gargs, __ argument_offset(O1_destslot), O1_destslot);
778
779 if (!rotate) {
780 for (int i = 0; i < swap_bytes; i += wordSize) {
781 __ ld_ptr(Address(O0_argslot, i), O2_scratch);
782 __ ld_ptr(Address(O1_destslot, i), O3_scratch);
783 __ st_ptr(O3_scratch, Address(O0_argslot, i));
784 __ st_ptr(O2_scratch, Address(O1_destslot, i));
785 }
786 } else {
787 // Save the first chunk, which is going to get overwritten.
788 switch (swap_bytes) {
789 case 4 : __ lduw(Address(O0_argslot, 0), O2_scratch); break;
790 case 16: __ ldx( Address(O0_argslot, 8), O3_scratch); //fall-thru
791 case 8 : __ ldx( Address(O0_argslot, 0), O2_scratch); break;
792 default: ShouldNotReachHere();
793 }
794
795 if (rotate > 0) {
796 // Rorate upward.
797 __ sub(O0_argslot, swap_bytes, O0_argslot);
798 #if ASSERT
799 {
800 // Verify that argslot > destslot, by at least swap_bytes.
801 Label L_ok;
802 __ cmp(O0_argslot, O1_destslot);
803 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok);
804 __ delayed()->nop();
805 __ stop("source must be above destination (upward rotation)");
806 __ bind(L_ok);
807 }
808 #endif
809 // Work argslot down to destslot, copying contiguous data upwards.
810 // Pseudo-code:
811 // argslot = src_addr - swap_bytes
812 // destslot = dest_addr
813 // while (argslot >= destslot) {
814 // *(argslot + swap_bytes) = *(argslot + 0);
815 // argslot--;
816 // }
817 Label loop;
818 __ bind(loop);
819 __ ld_ptr(Address(O0_argslot, 0), G5_index);
820 __ st_ptr(G5_index, Address(O0_argslot, swap_bytes));
821 __ sub(O0_argslot, wordSize, O0_argslot);
822 __ cmp(O0_argslot, O1_destslot);
823 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, loop);
824 __ delayed()->nop(); // FILLME
825 } else {
826 __ add(O0_argslot, swap_bytes, O0_argslot);
827 #if ASSERT
828 {
829 // Verify that argslot < destslot, by at least swap_bytes.
830 Label L_ok;
831 __ cmp(O0_argslot, O1_destslot);
832 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
833 __ delayed()->nop();
834 __ stop("source must be above destination (upward rotation)");
835 __ bind(L_ok);
836 }
837 #endif
838 // Work argslot up to destslot, copying contiguous data downwards.
839 // Pseudo-code:
840 // argslot = src_addr + swap_bytes
841 // destslot = dest_addr
842 // while (argslot >= destslot) {
843 // *(argslot - swap_bytes) = *(argslot + 0);
844 // argslot++;
845 // }
846 Label loop;
847 __ bind(loop);
848 __ ld_ptr(Address(O0_argslot, 0), G5_index);
849 __ st_ptr(G5_index, Address(O0_argslot, -swap_bytes));
850 __ add(O0_argslot, wordSize, O0_argslot);
851 __ cmp(O0_argslot, O1_destslot);
852 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, loop);
853 __ delayed()->nop(); // FILLME
854 }
855
856 // Store the original first chunk into the destination slot, now free.
857 switch (swap_bytes) {
858 case 4 : __ stw(O2_scratch, Address(O1_destslot, 0)); break;
859 case 16: __ stx(O3_scratch, Address(O1_destslot, 8)); // fall-thru
860 case 8 : __ stx(O2_scratch, Address(O1_destslot, 0)); break;
861 default: ShouldNotReachHere();
862 }
863 }
864
865 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
866 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
867 }
868 break;
869
870 case _adapter_dup_args:
871 {
872 // 'argslot' is the position of the first argument to duplicate.
873 __ ldsw(G3_amh_vmargslot, O0_argslot);
874 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
875
876 // 'stack_move' is negative number of words to duplicate.
877 Register G5_stack_move = G5_index;
878 __ ldsw(G3_amh_conversion, G5_stack_move);
879 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
880
881 // Remember the old Gargs (argslot[0]).
882 Register O1_oldarg = O1_scratch;
883 __ mov(Gargs, O1_oldarg);
884
885 // Move Gargs down to make room for dups.
886 __ sll_ptr(G5_stack_move, LogBytesPerWord, G5_stack_move);
887 __ add(Gargs, G5_stack_move, Gargs);
888
889 // Compute the new Gargs (argslot[0]).
890 Register O2_newarg = O2_scratch;
891 __ mov(Gargs, O2_newarg);
892
893 // Copy from oldarg[0...] down to newarg[0...]
894 // Pseude-code:
895 // O1_oldarg = old-Gargs
896 // O2_newarg = new-Gargs
897 // O0_argslot = argslot
898 // while (O2_newarg < O1_oldarg) *O2_newarg = *O0_argslot++
899 Label loop;
900 __ bind(loop);
901 __ ld_ptr(Address(O0_argslot, 0), O3_scratch);
902 __ st_ptr(O3_scratch, Address(O2_newarg, 0));
903 __ add(O0_argslot, wordSize, O0_argslot);
904 __ add(O2_newarg, wordSize, O2_newarg);
905 __ cmp(O2_newarg, O1_oldarg);
906 __ brx(Assembler::less, false, Assembler::pt, loop);
907 __ delayed()->nop(); // FILLME
908
909 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
910 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
911 }
912 break;
913
914 case _adapter_drop_args:
915 {
916 // 'argslot' is the position of the first argument to nuke.
917 __ ldsw(G3_amh_vmargslot, O0_argslot);
918 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
919
920 // 'stack_move' is number of words to drop.
921 Register G5_stack_move = G5_index;
922 __ ldsw(G3_amh_conversion, G5_stack_move);
923 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
924
925 remove_arg_slots(_masm, G5_stack_move, O0_argslot, O1_scratch, O2_scratch, O3_scratch);
926
927 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
928 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
929 }
930 break;
931
932 case _adapter_collect_args:
933 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
934 break;
935
936 case _adapter_spread_args:
937 // Handled completely by optimized cases.
938 __ stop("init_AdapterMethodHandle should not issue this");
939 break;
940
941 case _adapter_opt_spread_0:
942 case _adapter_opt_spread_1:
943 case _adapter_opt_spread_more:
944 {
945 // spread an array out into a group of arguments
946 __ unimplemented(entry_name(ek));
947 }
948 break;
949
950 case _adapter_flyby:
951 case _adapter_ricochet:
952 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
953 break;
954
955 default:
956 ShouldNotReachHere();
957 }
958
959 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
960 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
961
962 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
963 }