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 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
33 address interpreted_entry) {
34 // Just before the actual machine code entry point, allocate space
35 // for a MethodHandleEntry::Data record, so that we can manage everything
36 // from one base pointer.
37 __ align(wordSize);
38 address target = __ pc() + sizeof(Data);
39 while (__ pc() < target) {
40 __ nop();
41 __ align(wordSize);
42 }
43
44 MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
45 me->set_end_address(__ pc()); // set a temporary end_address
46 me->set_from_interpreted_entry(interpreted_entry);
47 me->set_type_checking_entry(NULL);
48
49 return (address) me;
50 }
51
52 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
53 address start_addr) {
54 MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
55 assert(me->end_address() == start_addr, "valid ME");
56
57 // Fill in the real end_address:
58 __ align(wordSize);
59 me->set_end_address(__ pc());
60
61 return me;
62 }
63
64
65 // Code generation
66 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
67 // I5_savedSP: sender SP (must preserve)
68 // G4 (Gargs): incoming argument list (must preserve)
69 // G5_method: invoke methodOop; becomes method type.
70 // G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
71 // O0, O1: garbage temps, blown away
72 Register O0_argslot = O0;
73 Register O1_scratch = O1;
74
75 // emit WrongMethodType path first, to enable back-branch from main path
76 Label wrong_method_type;
77 __ bind(wrong_method_type);
78 __ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
79 __ delayed()->nop();
80
81 // here's where control starts out:
82 __ align(CodeEntryAlignment);
83 address entry_point = __ pc();
84
85 // fetch the MethodType from the method handle into G5_method_type
86 {
87 Register tem = G5_method;
88 assert(tem == G5_method_type, "yes, it's the same register");
89 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
90 __ ld_ptr(Address(tem, *pchase), G5_method_type);
91 }
92 }
93
94 // given the MethodType, find out where the MH argument is buried
95 __ ld_ptr(Address(G5_method_type, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, O1_scratch)), O0_argslot);
96 __ ldsw( Address(O0_argslot, __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O0_argslot);
97 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
98
99 __ check_method_handle_type(G5_method_type, G3_method_handle, O1_scratch, wrong_method_type);
100 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
101
102 return entry_point;
103 }
104
105
106 #ifdef ASSERT
107 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
108 // Verify that argslot lies within (Gargs, FP].
109 Label L_ok, L_bad;
110 #ifdef _LP64
111 __ add(FP, STACK_BIAS, temp_reg);
112 __ cmp(argslot_reg, temp_reg);
113 #else
114 __ cmp(argslot_reg, FP);
115 #endif
116 __ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
117 __ delayed()->nop();
118 __ cmp(Gargs, argslot_reg);
119 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
120 __ delayed()->nop();
121 __ bind(L_bad);
122 __ stop(error_message);
123 __ bind(L_ok);
124 }
125 #endif
126
127
128 // Helper to insert argument slots into the stack.
129 // arg_slots must be a multiple of stack_move_unit() and <= 0
130 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
131 RegisterOrConstant arg_slots,
132 int arg_mask,
133 Register argslot_reg,
134 Register temp_reg, Register temp2_reg, Register temp3_reg) {
135 assert(temp3_reg != noreg, "temp3 required");
136 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
137 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
138
139 #ifdef ASSERT
140 verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
141 if (arg_slots.is_register()) {
142 Label L_ok, L_bad;
143 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
144 __ br(Assembler::greater, false, Assembler::pn, L_bad);
145 __ delayed()->nop();
146 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
147 __ br(Assembler::zero, false, Assembler::pt, L_ok);
148 __ delayed()->nop();
149 __ bind(L_bad);
150 __ stop("assert arg_slots <= 0 and clear low bits");
151 __ bind(L_ok);
152 } else {
153 assert(arg_slots.as_constant() <= 0, "");
154 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
155 }
156 #endif // ASSERT
157
158 #ifdef _LP64
159 if (arg_slots.is_register()) {
160 // Was arg_slots register loaded as signed int?
161 Label L_ok;
162 __ sll(arg_slots.as_register(), BitsPerInt, temp_reg);
163 __ sra(temp_reg, BitsPerInt, temp_reg);
164 __ cmp(arg_slots.as_register(), temp_reg);
165 __ br(Assembler::equal, false, Assembler::pt, L_ok);
166 __ delayed()->nop();
167 __ stop("arg_slots register not loaded as signed int");
168 __ bind(L_ok);
169 }
170 #endif
171
172 // Make space on the stack for the inserted argument(s).
173 // Then pull down everything shallower than argslot_reg.
174 // The stacked return address gets pulled down with everything else.
175 // That is, copy [sp, argslot) downward by -size words. In pseudo-code:
176 // sp -= size;
177 // for (temp = sp + size; temp < argslot; temp++)
178 // temp[-size] = temp[0]
179 // argslot -= size;
180 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
181
182 // Keep the stack pointer 2*wordSize aligned.
183 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
184 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
185 __ add(SP, masked_offset, SP);
186
187 __ mov(Gargs, temp_reg); // source pointer for copy
188 __ add(Gargs, offset, Gargs);
189
190 {
191 Label loop;
192 __ bind(loop);
193 // pull one word down each time through the loop
194 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
195 __ st_ptr(temp2_reg, Address(temp_reg, offset));
196 __ add(temp_reg, wordSize, temp_reg);
197 __ cmp(temp_reg, argslot_reg);
198 __ brx(Assembler::less, false, Assembler::pt, loop);
199 __ delayed()->nop(); // FILLME
200 }
201
202 // Now move the argslot down, to point to the opened-up space.
203 __ add(argslot_reg, offset, argslot_reg);
204 }
205
206
207 // Helper to remove argument slots from the stack.
208 // arg_slots must be a multiple of stack_move_unit() and >= 0
209 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
210 RegisterOrConstant arg_slots,
211 Register argslot_reg,
212 Register temp_reg, Register temp2_reg, Register temp3_reg) {
213 assert(temp3_reg != noreg, "temp3 required");
214 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
215 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
216
217 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
218
219 #ifdef ASSERT
220 // Verify that [argslot..argslot+size) lies within (Gargs, FP).
221 __ add(argslot_reg, offset, temp2_reg);
222 verify_argslot(_masm, temp2_reg, temp_reg, "deleted argument(s) must fall within current frame");
223 if (arg_slots.is_register()) {
224 Label L_ok, L_bad;
225 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
226 __ br(Assembler::less, false, Assembler::pn, L_bad);
227 __ delayed()->nop();
228 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
229 __ br(Assembler::zero, false, Assembler::pt, L_ok);
230 __ delayed()->nop();
231 __ bind(L_bad);
232 __ stop("assert arg_slots >= 0 and clear low bits");
233 __ bind(L_ok);
234 } else {
235 assert(arg_slots.as_constant() >= 0, "");
236 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
237 }
238 #endif // ASSERT
239
240 // Pull up everything shallower than argslot.
241 // Then remove the excess space on the stack.
242 // The stacked return address gets pulled up with everything else.
243 // That is, copy [sp, argslot) upward by size words. In pseudo-code:
244 // for (temp = argslot-1; temp >= sp; --temp)
245 // temp[size] = temp[0]
246 // argslot += size;
247 // sp += size;
248 __ sub(argslot_reg, wordSize, temp_reg); // source pointer for copy
249 {
250 Label loop;
251 __ bind(loop);
252 // pull one word up each time through the loop
253 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
254 __ st_ptr(temp2_reg, Address(temp_reg, offset));
255 __ sub(temp_reg, wordSize, temp_reg);
256 __ cmp(temp_reg, Gargs);
257 __ brx(Assembler::greaterEqual, false, Assembler::pt, loop);
258 __ delayed()->nop(); // FILLME
259 }
260
261 // Now move the argslot up, to point to the just-copied block.
262 __ add(Gargs, offset, Gargs);
263 // And adjust the argslot address to point at the deletion point.
264 __ add(argslot_reg, offset, argslot_reg);
265
266 // Keep the stack pointer 2*wordSize aligned.
267 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
268 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
269 __ add(SP, masked_offset, SP);
270 }
271
272
273 #ifndef PRODUCT
274 extern "C" void print_method_handle(oop mh);
275 void trace_method_handle_stub(const char* adaptername,
276 oop mh) {
277 #if 0
278 intptr_t* entry_sp,
279 intptr_t* saved_sp,
280 intptr_t* saved_bp) {
281 // called as a leaf from native code: do not block the JVM!
282 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
283 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
284 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
285 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
286 if (last_sp != saved_sp)
287 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
288 #endif
289
290 printf("MH %s mh="INTPTR_FORMAT"\n", adaptername, (intptr_t) mh);
291 print_method_handle(mh);
292 }
293 #endif // PRODUCT
294
295 // which conversion op types are implemented here?
296 int MethodHandles::adapter_conversion_ops_supported_mask() {
297 return ((1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
298 |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
299 |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
300 |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
301 |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
302 |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
303 |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
304 |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
305 |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
306 //|(1<<sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
307 );
308 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
309 }
310
311 //------------------------------------------------------------------------------
312 // MethodHandles::generate_method_handle_stub
313 //
314 // Generate an "entry" field for a method handle.
315 // This determines how the method handle will respond to calls.
316 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
317 // Here is the register state during an interpreted call,
318 // as set up by generate_method_handle_interpreter_entry():
319 // - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
320 // - G3: receiver method handle
321 // - O5_savedSP: sender SP (must preserve)
322
323 Register O0_argslot = O0;
324 Register O1_scratch = O1;
325 Register O2_scratch = O2;
326 Register O3_scratch = O3;
327 Register G5_index = G5;
328
329 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
330
331 // Some handy addresses:
332 Address G5_method_fie( G5_method, in_bytes(methodOopDesc::from_interpreted_offset()));
333
334 Address G3_mh_vmtarget( G3_method_handle, java_dyn_MethodHandle::vmtarget_offset_in_bytes());
335
336 Address G3_dmh_vmindex( G3_method_handle, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes());
337
338 Address G3_bmh_vmargslot( G3_method_handle, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes());
339 Address G3_bmh_argument( G3_method_handle, sun_dyn_BoundMethodHandle::argument_offset_in_bytes());
340
341 Address G3_amh_vmargslot( G3_method_handle, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes());
342 Address G3_amh_argument ( G3_method_handle, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes());
343 Address G3_amh_conversion(G3_method_handle, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes());
344
345 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
346
347 if (have_entry(ek)) {
348 __ nop(); // empty stubs make SG sick
349 return;
350 }
351
352 address interp_entry = __ pc();
353 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
354
355 #ifndef PRODUCT
356 if (TraceMethodHandles) {
357 // save: Gargs, O5_savedSP
358 __ save(SP, -16*wordSize, SP);
359 __ set((intptr_t) entry_name(ek), O0);
360 __ mov(G3_method_handle, O1);
361 __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
362 __ restore(SP, 16*wordSize, SP);
363 }
364 #endif // PRODUCT
365
366 switch ((int) ek) {
367 case _raise_exception:
368 {
369 // Not a real MH entry, but rather shared code for raising an
370 // exception. Extra local arguments are passed in scratch
371 // registers, as required type in O3, failing object (or NULL)
372 // in O2, failing bytecode type in O1.
373
374 __ mov(O5_savedSP, SP); // Cut the stack back to where the caller started.
375
376 // Push arguments as if coming from the interpreter.
377 Register O0_scratch = O0_argslot;
378 int stackElementSize = Interpreter::stackElementSize;
379
380 // Make space on the stack for the arguments and set Gargs
381 // correctly.
382 __ sub(SP, 4*stackElementSize, SP); // Keep stack aligned.
383 __ add(SP, (frame::varargs_offset)*wordSize - 1*Interpreter::stackElementSize + STACK_BIAS + BytesPerWord, Gargs);
384
385 // void raiseException(int code, Object actual, Object required)
386 __ st( O1_scratch, Address(Gargs, 2*stackElementSize)); // code
387 __ st_ptr(O2_scratch, Address(Gargs, 1*stackElementSize)); // actual
388 __ st_ptr(O3_scratch, Address(Gargs, 0*stackElementSize)); // required
389
390 Label no_method;
391 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
392 __ set(AddressLiteral((address) &_raise_exception_method), G5_method);
393 __ ld_ptr(Address(G5_method, 0), G5_method);
394 __ tst(G5_method);
395 __ brx(Assembler::zero, false, Assembler::pn, no_method);
396 __ delayed()->nop();
397
398 int jobject_oop_offset = 0;
399 __ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
400 __ tst(G5_method);
401 __ brx(Assembler::zero, false, Assembler::pn, no_method);
402 __ delayed()->nop();
403
404 __ verify_oop(G5_method);
405 __ jump_indirect_to(G5_method_fie, O1_scratch);
406 __ delayed()->nop();
407
408 // If we get here, the Java runtime did not do its job of creating the exception.
409 // Do something that is at least causes a valid throw from the interpreter.
410 __ bind(no_method);
411 __ unimplemented("_raise_exception no method");
412 }
413 break;
414
415 case _invokestatic_mh:
416 case _invokespecial_mh:
417 {
418 __ ld_ptr(G3_mh_vmtarget, G5_method); // target is a methodOop
419 __ verify_oop(G5_method);
420 // Same as TemplateTable::invokestatic or invokespecial,
421 // minus the CP setup and profiling:
422 if (ek == _invokespecial_mh) {
423 // Must load & check the first argument before entering the target method.
424 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
425 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
426 __ null_check(G3_method_handle);
427 __ verify_oop(G3_method_handle);
428 }
429 __ jump_indirect_to(G5_method_fie, O1_scratch);
430 __ delayed()->nop();
431 }
432 break;
433
434 case _invokevirtual_mh:
435 {
436 // Same as TemplateTable::invokevirtual,
437 // minus the CP setup and profiling:
438
439 // Pick out the vtable index and receiver offset from the MH,
440 // and then we can discard it:
441 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
442 __ ldsw(G3_dmh_vmindex, G5_index);
443 // Note: The verifier allows us to ignore G3_mh_vmtarget.
444 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
445 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
446
447 // Get receiver klass:
448 Register O0_klass = O0_argslot;
449 __ load_klass(G3_method_handle, O0_klass);
450 __ verify_oop(O0_klass);
451
452 // Get target methodOop & entry point:
453 const int base = instanceKlass::vtable_start_offset() * wordSize;
454 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
455
456 __ sll_ptr(G5_index, LogBytesPerWord, G5_index);
457 __ add(O0_klass, G5_index, O0_klass);
458 Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
459 __ ld_ptr(vtable_entry_addr, G5_method);
460
461 __ verify_oop(G5_method);
462 __ jump_indirect_to(G5_method_fie, O1_scratch);
463 __ delayed()->nop();
464 }
465 break;
466
467 case _invokeinterface_mh:
468 {
469 // Same as TemplateTable::invokeinterface,
470 // minus the CP setup and profiling:
471 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
472 Register O1_intf = O1_scratch;
473 __ ld_ptr(G3_mh_vmtarget, O1_intf);
474 __ ldsw(G3_dmh_vmindex, G5_index);
475 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
476 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
477
478 // Get receiver klass:
479 Register O0_klass = O0_argslot;
480 __ load_klass(G3_method_handle, O0_klass);
481 __ verify_oop(O0_klass);
482
483 // Get interface:
484 Label no_such_interface;
485 __ verify_oop(O1_intf);
486 __ lookup_interface_method(O0_klass, O1_intf,
487 // Note: next two args must be the same:
488 G5_index, G5_method,
489 O2_scratch,
490 O3_scratch,
491 no_such_interface);
492
493 __ verify_oop(G5_method);
494 __ jump_indirect_to(G5_method_fie, O1_scratch);
495 __ delayed()->nop();
496
497 __ bind(no_such_interface);
498 // Throw an exception.
499 // For historical reasons, it will be IncompatibleClassChangeError.
500 __ unimplemented("not tested yet");
501 __ ld_ptr(Address(O1_intf, java_mirror_offset), O3_scratch); // required interface
502 __ mov(O0_klass, O2_scratch); // bad receiver
503 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
504 __ delayed()->mov(Bytecodes::_invokeinterface, O1_scratch); // who is complaining?
505 }
506 break;
507
508 case _bound_ref_mh:
509 case _bound_int_mh:
510 case _bound_long_mh:
511 case _bound_ref_direct_mh:
512 case _bound_int_direct_mh:
513 case _bound_long_direct_mh:
514 {
515 const bool direct_to_method = (ek >= _bound_ref_direct_mh);
516 BasicType arg_type = T_ILLEGAL;
517 int arg_mask = _INSERT_NO_MASK;
518 int arg_slots = -1;
519 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
520
521 // Make room for the new argument:
522 __ ldsw(G3_bmh_vmargslot, O0_argslot);
523 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
524
525 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, O0_argslot, O1_scratch, O2_scratch, G5_index);
526
527 // Store bound argument into the new stack slot:
528 __ ld_ptr(G3_bmh_argument, O1_scratch);
529 if (arg_type == T_OBJECT) {
530 __ st_ptr(O1_scratch, Address(O0_argslot, 0));
531 } else {
532 Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
533 __ load_sized_value(prim_value_addr, O2_scratch, type2aelembytes(arg_type), is_signed_subword_type(arg_type));
534 if (arg_slots == 2) {
535 __ unimplemented("not yet tested");
536 #ifndef _LP64
537 __ signx(O2_scratch, O3_scratch); // Sign extend
538 #endif
539 __ st_long(O2_scratch, Address(O0_argslot, 0)); // Uses O2/O3 on !_LP64
540 } else {
541 __ st_ptr( O2_scratch, Address(O0_argslot, 0));
542 }
543 }
544
545 if (direct_to_method) {
546 __ ld_ptr(G3_mh_vmtarget, G5_method); // target is a methodOop
547 __ verify_oop(G5_method);
548 __ jump_indirect_to(G5_method_fie, O1_scratch);
549 __ delayed()->nop();
550 } else {
551 __ ld_ptr(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
552 __ verify_oop(G3_method_handle);
553 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
554 }
555 }
556 break;
557
558 case _adapter_retype_only:
559 case _adapter_retype_raw:
560 // Immediately jump to the next MH layer:
561 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
562 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
563 // This is OK when all parameter types widen.
564 // It is also OK when a return type narrows.
565 break;
566
567 case _adapter_check_cast:
568 {
569 // Temps:
570 Register G5_klass = G5_index; // Interesting AMH data.
571
572 // Check a reference argument before jumping to the next layer of MH:
573 __ ldsw(G3_amh_vmargslot, O0_argslot);
574 Address vmarg = __ argument_address(O0_argslot);
575
576 // What class are we casting to?
577 __ ld_ptr(G3_amh_argument, G5_klass); // This is a Class object!
578 __ ld_ptr(Address(G5_klass, java_lang_Class::klass_offset_in_bytes()), G5_klass);
579
580 Label done;
581 __ ld_ptr(vmarg, O1_scratch);
582 __ tst(O1_scratch);
583 __ brx(Assembler::zero, false, Assembler::pn, done); // No cast if null.
584 __ delayed()->nop();
585 __ load_klass(O1_scratch, O1_scratch);
586
587 // Live at this point:
588 // - G5_klass : klass required by the target method
589 // - O1_scratch : argument klass to test
590 // - G3_method_handle: adapter method handle
591 __ check_klass_subtype(O1_scratch, G5_klass, O0_argslot, O2_scratch, done);
592
593 // If we get here, the type check failed!
594 __ ldsw(G3_amh_vmargslot, O0_argslot); // reload argslot field
595 __ ld_ptr(G3_amh_argument, O3_scratch); // required class
596 __ ld_ptr(vmarg, O2_scratch); // bad object
597 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O0_argslot);
598 __ delayed()->mov(Bytecodes::_checkcast, O1_scratch); // who is complaining?
599
600 __ bind(done);
601 // Get the new MH:
602 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
603 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
604 }
605 break;
606
607 case _adapter_prim_to_prim:
608 case _adapter_ref_to_prim:
609 // Handled completely by optimized cases.
610 __ stop("init_AdapterMethodHandle should not issue this");
611 break;
612
613 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
614 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
615 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
616 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
617 {
618 // Perform an in-place conversion to int or an int subword.
619 __ ldsw(G3_amh_vmargslot, O0_argslot);
620 Address vmarg = __ argument_address(O0_argslot);
621 Address value;
622 bool value_left_justified = false;
623
624 switch (ek) {
625 case _adapter_opt_i2i:
626 case _adapter_opt_l2i:
627 __ unimplemented(entry_name(ek));
628 value = vmarg;
629 break;
630 case _adapter_opt_unboxi:
631 {
632 // Load the value up from the heap.
633 __ ld_ptr(vmarg, O1_scratch);
634 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
635 #ifdef ASSERT
636 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
637 if (is_subword_type(BasicType(bt)))
638 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
639 }
640 #endif
641 __ null_check(O1_scratch, value_offset);
642 value = Address(O1_scratch, value_offset);
643 #ifdef _BIG_ENDIAN
644 // Values stored in objects are packed.
645 value_left_justified = true;
646 #endif
647 }
648 break;
649 default:
650 ShouldNotReachHere();
651 }
652
653 // This check is required on _BIG_ENDIAN
654 Register G5_vminfo = G5_index;
655 __ ldsw(G3_amh_conversion, G5_vminfo);
656 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
657
658 // Original 32-bit vmdata word must be of this form:
659 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
660 __ lduw(value, O1_scratch);
661 if (!value_left_justified)
662 __ sll(O1_scratch, G5_vminfo, O1_scratch);
663 Label zero_extend, done;
664 __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
665 __ br(Assembler::zero, false, Assembler::pn, zero_extend);
666 __ delayed()->nop();
667
668 // this path is taken for int->byte, int->short
669 __ sra(O1_scratch, G5_vminfo, O1_scratch);
670 __ ba(false, done);
671 __ delayed()->nop();
672
673 __ bind(zero_extend);
674 // this is taken for int->char
675 __ srl(O1_scratch, G5_vminfo, O1_scratch);
676
677 __ bind(done);
678 __ st(O1_scratch, vmarg);
679
680 // Get the new MH:
681 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
682 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
683 }
684 break;
685
686 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
687 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
688 {
689 // Perform an in-place int-to-long or ref-to-long conversion.
690 __ ldsw(G3_amh_vmargslot, O0_argslot);
691
692 // On big-endian machine we duplicate the slot and store the MSW
693 // in the first slot.
694 __ add(Gargs, __ argument_offset(O0_argslot, 1), O0_argslot);
695
696 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK, O0_argslot, O1_scratch, O2_scratch, G5_index);
697
698 Address arg_lsw(O0_argslot, 0);
699 Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
700
701 switch (ek) {
702 case _adapter_opt_i2l:
703 {
704 __ ldsw(arg_lsw, O2_scratch); // Load LSW
705 #ifndef _LP64
706 __ signx(O2_scratch, O3_scratch); // Sign extend
707 #endif
708 __ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
709 }
710 break;
711 case _adapter_opt_unboxl:
712 {
713 // Load the value up from the heap.
714 __ ld_ptr(arg_lsw, O1_scratch);
715 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
716 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
717 __ null_check(O1_scratch, value_offset);
718 __ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
719 __ st_long(O2_scratch, arg_msw);
720 }
721 break;
722 default:
723 ShouldNotReachHere();
724 }
725
726 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
727 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
728 }
729 break;
730
731 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
732 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
733 {
734 // perform an in-place floating primitive conversion
735 __ unimplemented(entry_name(ek));
736 }
737 break;
738
739 case _adapter_prim_to_ref:
740 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
741 break;
742
743 case _adapter_swap_args:
744 case _adapter_rot_args:
745 // handled completely by optimized cases
746 __ stop("init_AdapterMethodHandle should not issue this");
747 break;
748
749 case _adapter_opt_swap_1:
750 case _adapter_opt_swap_2:
751 case _adapter_opt_rot_1_up:
752 case _adapter_opt_rot_1_down:
753 case _adapter_opt_rot_2_up:
754 case _adapter_opt_rot_2_down:
755 {
756 int swap_bytes = 0, rotate = 0;
757 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
758
759 // 'argslot' is the position of the first argument to swap.
760 __ ldsw(G3_amh_vmargslot, O0_argslot);
761 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
762
763 // 'vminfo' is the second.
764 Register O1_destslot = O1_scratch;
765 __ ldsw(G3_amh_conversion, O1_destslot);
766 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
767 __ and3(O1_destslot, CONV_VMINFO_MASK, O1_destslot);
768 __ add(Gargs, __ argument_offset(O1_destslot), O1_destslot);
769
770 if (!rotate) {
771 for (int i = 0; i < swap_bytes; i += wordSize) {
772 __ ld_ptr(Address(O0_argslot, i), O2_scratch);
773 __ ld_ptr(Address(O1_destslot, i), O3_scratch);
774 __ st_ptr(O3_scratch, Address(O0_argslot, i));
775 __ st_ptr(O2_scratch, Address(O1_destslot, i));
776 }
777 } else {
778 // Save the first chunk, which is going to get overwritten.
779 switch (swap_bytes) {
780 case 4 : __ lduw(Address(O0_argslot, 0), O2_scratch); break;
781 case 16: __ ldx( Address(O0_argslot, 8), O3_scratch); //fall-thru
782 case 8 : __ ldx( Address(O0_argslot, 0), O2_scratch); break;
783 default: ShouldNotReachHere();
784 }
785
786 if (rotate > 0) {
787 // Rorate upward.
788 __ sub(O0_argslot, swap_bytes, O0_argslot);
789 #if ASSERT
790 {
791 // Verify that argslot > destslot, by at least swap_bytes.
792 Label L_ok;
793 __ cmp(O0_argslot, O1_destslot);
794 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok);
795 __ delayed()->nop();
796 __ stop("source must be above destination (upward rotation)");
797 __ bind(L_ok);
798 }
799 #endif
800 // Work argslot down to destslot, copying contiguous data upwards.
801 // Pseudo-code:
802 // argslot = src_addr - swap_bytes
803 // destslot = dest_addr
804 // while (argslot >= destslot) {
805 // *(argslot + swap_bytes) = *(argslot + 0);
806 // argslot--;
807 // }
808 Label loop;
809 __ bind(loop);
810 __ ld_ptr(Address(O0_argslot, 0), G5_index);
811 __ st_ptr(G5_index, Address(O0_argslot, swap_bytes));
812 __ sub(O0_argslot, wordSize, O0_argslot);
813 __ cmp(O0_argslot, O1_destslot);
814 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, loop);
815 __ delayed()->nop(); // FILLME
816 } else {
817 __ add(O0_argslot, swap_bytes, O0_argslot);
818 #if ASSERT
819 {
820 // Verify that argslot < destslot, by at least swap_bytes.
821 Label L_ok;
822 __ cmp(O0_argslot, O1_destslot);
823 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
824 __ delayed()->nop();
825 __ stop("source must be above destination (upward rotation)");
826 __ bind(L_ok);
827 }
828 #endif
829 // Work argslot up to destslot, copying contiguous data downwards.
830 // Pseudo-code:
831 // argslot = src_addr + swap_bytes
832 // destslot = dest_addr
833 // while (argslot >= destslot) {
834 // *(argslot - swap_bytes) = *(argslot + 0);
835 // argslot++;
836 // }
837 Label loop;
838 __ bind(loop);
839 __ ld_ptr(Address(O0_argslot, 0), G5_index);
840 __ st_ptr(G5_index, Address(O0_argslot, -swap_bytes));
841 __ add(O0_argslot, wordSize, O0_argslot);
842 __ cmp(O0_argslot, O1_destslot);
843 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, loop);
844 __ delayed()->nop(); // FILLME
845 }
846
847 // Store the original first chunk into the destination slot, now free.
848 switch (swap_bytes) {
849 case 4 : __ stw(O2_scratch, Address(O1_destslot, 0)); break;
850 case 16: __ stx(O3_scratch, Address(O1_destslot, 8)); // fall-thru
851 case 8 : __ stx(O2_scratch, Address(O1_destslot, 0)); break;
852 default: ShouldNotReachHere();
853 }
854 }
855
856 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
857 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
858 }
859 break;
860
861 case _adapter_dup_args:
862 {
863 // 'argslot' is the position of the first argument to duplicate.
864 __ ldsw(G3_amh_vmargslot, O0_argslot);
865 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
866
867 // 'stack_move' is negative number of words to duplicate.
868 Register G5_stack_move = G5_index;
869 __ ldsw(G3_amh_conversion, G5_stack_move);
870 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
871
872 // Remember the old Gargs (argslot[0]).
873 Register O1_oldarg = O1_scratch;
874 __ mov(Gargs, O1_oldarg);
875
876 // Move Gargs down to make room for dups.
877 __ sll_ptr(G5_stack_move, LogBytesPerWord, G5_stack_move);
878 __ add(Gargs, G5_stack_move, Gargs);
879
880 // Compute the new Gargs (argslot[0]).
881 Register O2_newarg = O2_scratch;
882 __ mov(Gargs, O2_newarg);
883
884 // Copy from oldarg[0...] down to newarg[0...]
885 // Pseude-code:
886 // O1_oldarg = old-Gargs
887 // O2_newarg = new-Gargs
888 // O0_argslot = argslot
889 // while (O2_newarg < O1_oldarg) *O2_newarg = *O0_argslot++
890 Label loop;
891 __ bind(loop);
892 __ ld_ptr(Address(O0_argslot, 0), O3_scratch);
893 __ st_ptr(O3_scratch, Address(O2_newarg, 0));
894 __ add(O0_argslot, wordSize, O0_argslot);
895 __ add(O2_newarg, wordSize, O2_newarg);
896 __ cmp(O2_newarg, O1_oldarg);
897 __ brx(Assembler::less, false, Assembler::pt, loop);
898 __ delayed()->nop(); // FILLME
899
900 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
901 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
902 }
903 break;
904
905 case _adapter_drop_args:
906 {
907 // 'argslot' is the position of the first argument to nuke.
908 __ ldsw(G3_amh_vmargslot, O0_argslot);
909 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
910
911 // 'stack_move' is number of words to drop.
912 Register G5_stack_move = G5_index;
913 __ ldsw(G3_amh_conversion, G5_stack_move);
914 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
915
916 remove_arg_slots(_masm, G5_stack_move, O0_argslot, O1_scratch, O2_scratch, O3_scratch);
917
918 __ ld_ptr(G3_mh_vmtarget, G3_method_handle);
919 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
920 }
921 break;
922
923 case _adapter_collect_args:
924 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
925 break;
926
927 case _adapter_spread_args:
928 // Handled completely by optimized cases.
929 __ stop("init_AdapterMethodHandle should not issue this");
930 break;
931
932 case _adapter_opt_spread_0:
933 case _adapter_opt_spread_1:
934 case _adapter_opt_spread_more:
935 {
936 // spread an array out into a group of arguments
937 __ unimplemented(entry_name(ek));
938 }
939 break;
940
941 case _adapter_flyby:
942 case _adapter_ricochet:
943 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
944 break;
945
946 default:
947 ShouldNotReachHere();
948 }
949
950 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
951 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
952
953 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
954 }