1 /*
2 * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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/O5_savedSP: sender SP (must preserve)
76 // G4 (Gargs): incoming argument list (must preserve)
77 // G5_method: invoke methodOop
78 // G3_method_handle: receiver method handle (must load from sp[MethodTypeForm.vmslots])
79 // O0, O1, O2, O3, O4: garbage temps, blown away
80 Register O0_mtype = O0;
81 Register O1_scratch = O1;
82 Register O2_scratch = O2;
83 Register O3_scratch = O3;
84 Register O4_argslot = O4;
85 Register O4_argbase = O4;
86
87 // emit WrongMethodType path first, to enable back-branch from main path
88 Label wrong_method_type;
89 __ bind(wrong_method_type);
90 Label invoke_generic_slow_path;
91 assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
92 __ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
93 __ cmp(O1_scratch, (int) vmIntrinsics::_invokeExact);
94 __ brx(Assembler::notEqual, false, Assembler::pt, invoke_generic_slow_path);
95 __ delayed()->nop();
96 __ mov(O0_mtype, G5_method_type); // required by throw_WrongMethodType
97 // mov(G3_method_handle, G3_method_handle); // already in this register
98 __ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
99 __ delayed()->nop();
100
101 // here's where control starts out:
102 __ align(CodeEntryAlignment);
103 address entry_point = __ pc();
104
105 // fetch the MethodType from the method handle
106 {
107 Register tem = G5_method;
108 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
109 __ ld_ptr(Address(tem, *pchase), O0_mtype);
110 tem = O0_mtype; // in case there is another indirection
111 }
112 }
113
114 // given the MethodType, find out where the MH argument is buried
115 __ load_heap_oop(Address(O0_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, O1_scratch)), O4_argslot);
116 __ ldsw( Address(O4_argslot, __ delayed_value(java_lang_invoke_MethodTypeForm::vmslots_offset_in_bytes, O1_scratch)), O4_argslot);
117 __ add(Gargs, __ argument_offset(O4_argslot, 1), O4_argbase);
118 // Note: argument_address uses its input as a scratch register!
119 __ ld_ptr(Address(O4_argbase, -Interpreter::stackElementSize), G3_method_handle);
120
121 trace_method_handle(_masm, "invokeExact");
122
123 __ check_method_handle_type(O0_mtype, G3_method_handle, O1_scratch, wrong_method_type);
124 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
125
126 // for invokeGeneric (only), apply argument and result conversions on the fly
127 __ bind(invoke_generic_slow_path);
128 #ifdef ASSERT
129 { Label L;
130 __ ldub(Address(G5_method, methodOopDesc::intrinsic_id_offset_in_bytes()), O1_scratch);
131 __ cmp(O1_scratch, (int) vmIntrinsics::_invokeGeneric);
132 __ brx(Assembler::equal, false, Assembler::pt, L);
133 __ delayed()->nop();
134 __ stop("bad methodOop::intrinsic_id");
135 __ bind(L);
136 }
137 #endif //ASSERT
138
139 // make room on the stack for another pointer:
140 insert_arg_slots(_masm, 2 * stack_move_unit(), _INSERT_REF_MASK, O4_argbase, O1_scratch, O2_scratch, O3_scratch);
141 // load up an adapter from the calling type (Java weaves this)
142 Register O2_form = O2_scratch;
143 Register O3_adapter = O3_scratch;
144 __ load_heap_oop(Address(O0_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, O1_scratch)), O2_form);
145 // load_heap_oop(Address(O2_form, __ delayed_value(java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes, O1_scratch)), O3_adapter);
146 // deal with old JDK versions:
147 __ add( Address(O2_form, __ delayed_value(java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes, O1_scratch)), O3_adapter);
148 __ cmp(O3_adapter, O2_form);
149 Label sorry_no_invoke_generic;
150 __ brx(Assembler::lessUnsigned, false, Assembler::pn, sorry_no_invoke_generic);
151 __ delayed()->nop();
152
153 __ load_heap_oop(Address(O3_adapter, 0), O3_adapter);
154 __ tst(O3_adapter);
155 __ brx(Assembler::zero, false, Assembler::pn, sorry_no_invoke_generic);
156 __ delayed()->nop();
157 __ st_ptr(O3_adapter, Address(O4_argbase, 1 * Interpreter::stackElementSize));
158 // As a trusted first argument, pass the type being called, so the adapter knows
159 // the actual types of the arguments and return values.
160 // (Generic invokers are shared among form-families of method-type.)
161 __ st_ptr(O0_mtype, Address(O4_argbase, 0 * Interpreter::stackElementSize));
162 // FIXME: assert that O3_adapter is of the right method-type.
163 __ mov(O3_adapter, G3_method_handle);
164 trace_method_handle(_masm, "invokeGeneric");
165 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
166
167 __ bind(sorry_no_invoke_generic); // no invokeGeneric implementation available!
168 __ mov(O0_mtype, G5_method_type); // required by throw_WrongMethodType
169 // mov(G3_method_handle, G3_method_handle); // already in this register
170 __ jump_to(AddressLiteral(Interpreter::throw_WrongMethodType_entry()), O1_scratch);
171 __ delayed()->nop();
172
173 return entry_point;
174 }
175
176
177 #ifdef ASSERT
178 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg, Register temp_reg, const char* error_message) {
179 // Verify that argslot lies within (Gargs, FP].
180 Label L_ok, L_bad;
181 BLOCK_COMMENT("{ verify_argslot");
182 #ifdef _LP64
183 __ add(FP, STACK_BIAS, temp_reg);
184 __ cmp(argslot_reg, temp_reg);
185 #else
186 __ cmp(argslot_reg, FP);
187 #endif
188 __ brx(Assembler::greaterUnsigned, false, Assembler::pn, L_bad);
189 __ delayed()->nop();
190 __ cmp(Gargs, argslot_reg);
191 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
192 __ delayed()->nop();
193 __ bind(L_bad);
194 __ stop(error_message);
195 __ bind(L_ok);
196 BLOCK_COMMENT("} verify_argslot");
197 }
198 #endif
199
200
201 // Helper to insert argument slots into the stack.
202 // arg_slots must be a multiple of stack_move_unit() and <= 0
203 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
204 RegisterOrConstant arg_slots,
205 int arg_mask,
206 Register argslot_reg,
207 Register temp_reg, Register temp2_reg, Register temp3_reg) {
208 assert(temp3_reg != noreg, "temp3 required");
209 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
210 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
211
212 #ifdef ASSERT
213 verify_argslot(_masm, argslot_reg, temp_reg, "insertion point must fall within current frame");
214 if (arg_slots.is_register()) {
215 Label L_ok, L_bad;
216 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
217 __ br(Assembler::greater, false, Assembler::pn, L_bad);
218 __ delayed()->nop();
219 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
220 __ br(Assembler::zero, false, Assembler::pt, L_ok);
221 __ delayed()->nop();
222 __ bind(L_bad);
223 __ stop("assert arg_slots <= 0 and clear low bits");
224 __ bind(L_ok);
225 } else {
226 assert(arg_slots.as_constant() <= 0, "");
227 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
228 }
229 #endif // ASSERT
230
231 #ifdef _LP64
232 if (arg_slots.is_register()) {
233 // Was arg_slots register loaded as signed int?
234 Label L_ok;
235 __ sll(arg_slots.as_register(), BitsPerInt, temp_reg);
236 __ sra(temp_reg, BitsPerInt, temp_reg);
237 __ cmp(arg_slots.as_register(), temp_reg);
238 __ br(Assembler::equal, false, Assembler::pt, L_ok);
239 __ delayed()->nop();
240 __ stop("arg_slots register not loaded as signed int");
241 __ bind(L_ok);
242 }
243 #endif
244
245 // Make space on the stack for the inserted argument(s).
246 // Then pull down everything shallower than argslot_reg.
247 // The stacked return address gets pulled down with everything else.
248 // That is, copy [sp, argslot) downward by -size words. In pseudo-code:
249 // sp -= size;
250 // for (temp = sp + size; temp < argslot; temp++)
251 // temp[-size] = temp[0]
252 // argslot -= size;
253 BLOCK_COMMENT("insert_arg_slots {");
254 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
255
256 // Keep the stack pointer 2*wordSize aligned.
257 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
258 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
259 __ add(SP, masked_offset, SP);
260
261 __ mov(Gargs, temp_reg); // source pointer for copy
262 __ add(Gargs, offset, Gargs);
263
264 {
265 Label loop;
266 __ BIND(loop);
267 // pull one word down each time through the loop
268 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
269 __ st_ptr(temp2_reg, Address(temp_reg, offset));
270 __ add(temp_reg, wordSize, temp_reg);
271 __ cmp(temp_reg, argslot_reg);
272 __ brx(Assembler::less, false, Assembler::pt, loop);
273 __ delayed()->nop(); // FILLME
274 }
275
276 // Now move the argslot down, to point to the opened-up space.
277 __ add(argslot_reg, offset, argslot_reg);
278 BLOCK_COMMENT("} insert_arg_slots");
279 }
280
281
282 // Helper to remove argument slots from the stack.
283 // arg_slots must be a multiple of stack_move_unit() and >= 0
284 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
285 RegisterOrConstant arg_slots,
286 Register argslot_reg,
287 Register temp_reg, Register temp2_reg, Register temp3_reg) {
288 assert(temp3_reg != noreg, "temp3 required");
289 assert_different_registers(argslot_reg, temp_reg, temp2_reg, temp3_reg,
290 (!arg_slots.is_register() ? Gargs : arg_slots.as_register()));
291
292 RegisterOrConstant offset = __ regcon_sll_ptr(arg_slots, LogBytesPerWord, temp3_reg);
293
294 #ifdef ASSERT
295 // Verify that [argslot..argslot+size) lies within (Gargs, FP).
296 __ add(argslot_reg, offset, temp2_reg);
297 verify_argslot(_masm, temp2_reg, temp_reg, "deleted argument(s) must fall within current frame");
298 if (arg_slots.is_register()) {
299 Label L_ok, L_bad;
300 __ cmp(arg_slots.as_register(), (int32_t) NULL_WORD);
301 __ br(Assembler::less, false, Assembler::pn, L_bad);
302 __ delayed()->nop();
303 __ btst(-stack_move_unit() - 1, arg_slots.as_register());
304 __ br(Assembler::zero, false, Assembler::pt, L_ok);
305 __ delayed()->nop();
306 __ bind(L_bad);
307 __ stop("assert arg_slots >= 0 and clear low bits");
308 __ bind(L_ok);
309 } else {
310 assert(arg_slots.as_constant() >= 0, "");
311 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
312 }
313 #endif // ASSERT
314
315 BLOCK_COMMENT("remove_arg_slots {");
316 // Pull up everything shallower than argslot.
317 // Then remove the excess space on the stack.
318 // The stacked return address gets pulled up with everything else.
319 // That is, copy [sp, argslot) upward by size words. In pseudo-code:
320 // for (temp = argslot-1; temp >= sp; --temp)
321 // temp[size] = temp[0]
322 // argslot += size;
323 // sp += size;
324 __ sub(argslot_reg, wordSize, temp_reg); // source pointer for copy
325 {
326 Label loop;
327 __ BIND(loop);
328 // pull one word up each time through the loop
329 __ ld_ptr(Address(temp_reg, 0), temp2_reg);
330 __ st_ptr(temp2_reg, Address(temp_reg, offset));
331 __ sub(temp_reg, wordSize, temp_reg);
332 __ cmp(temp_reg, Gargs);
333 __ brx(Assembler::greaterEqual, false, Assembler::pt, loop);
334 __ delayed()->nop(); // FILLME
335 }
336
337 // Now move the argslot up, to point to the just-copied block.
338 __ add(Gargs, offset, Gargs);
339 // And adjust the argslot address to point at the deletion point.
340 __ add(argslot_reg, offset, argslot_reg);
341
342 // Keep the stack pointer 2*wordSize aligned.
343 const int TwoWordAlignmentMask = right_n_bits(LogBytesPerWord + 1);
344 RegisterOrConstant masked_offset = __ regcon_andn_ptr(offset, TwoWordAlignmentMask, temp_reg);
345 __ add(SP, masked_offset, SP);
346 BLOCK_COMMENT("} remove_arg_slots");
347 }
348
349
350 #ifndef PRODUCT
351 extern "C" void print_method_handle(oop mh);
352 void trace_method_handle_stub(const char* adaptername,
353 oopDesc* mh) {
354 printf("MH %s mh="INTPTR_FORMAT"\n", adaptername, (intptr_t) mh);
355 print_method_handle(mh);
356 }
357 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
358 if (!TraceMethodHandles) return;
359 BLOCK_COMMENT("trace_method_handle {");
360 // save: Gargs, O5_savedSP
361 __ save_frame(16);
362 __ set((intptr_t) adaptername, O0);
363 __ mov(G3_method_handle, O1);
364 __ mov(G3_method_handle, L3);
365 __ mov(Gargs, L4);
366 __ mov(G5_method_type, L5);
367 __ call_VM_leaf(L7, CAST_FROM_FN_PTR(address, trace_method_handle_stub));
368
369 __ mov(L3, G3_method_handle);
370 __ mov(L4, Gargs);
371 __ mov(L5, G5_method_type);
372 __ restore();
373 BLOCK_COMMENT("} trace_method_handle");
374 }
375 #endif // PRODUCT
376
377 // which conversion op types are implemented here?
378 int MethodHandles::adapter_conversion_ops_supported_mask() {
379 return ((1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY)
380 |(1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW)
381 |(1<<java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST)
382 |(1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM)
383 |(1<<java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM)
384 |(1<<java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS)
385 |(1<<java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS)
386 |(1<<java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS)
387 |(1<<java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS)
388 //|(1<<java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
389 );
390 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
391 }
392
393 //------------------------------------------------------------------------------
394 // MethodHandles::generate_method_handle_stub
395 //
396 // Generate an "entry" field for a method handle.
397 // This determines how the method handle will respond to calls.
398 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
399 // Here is the register state during an interpreted call,
400 // as set up by generate_method_handle_interpreter_entry():
401 // - G5: garbage temp (was MethodHandle.invoke methodOop, unused)
402 // - G3: receiver method handle
403 // - O5_savedSP: sender SP (must preserve)
404
405 const Register O0_argslot = O0;
406 const Register O1_scratch = O1;
407 const Register O2_scratch = O2;
408 const Register O3_scratch = O3;
409 const Register G5_index = G5;
410
411 // Argument registers for _raise_exception.
412 const Register O0_code = O0;
413 const Register O1_actual = O1;
414 const Register O2_required = O2;
415
416 guarantee(java_lang_invoke_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
417
418 // Some handy addresses:
419 Address G5_method_fie( G5_method, in_bytes(methodOopDesc::from_interpreted_offset()));
420 Address G5_method_fce( G5_method, in_bytes(methodOopDesc::from_compiled_offset()));
421
422 Address G3_mh_vmtarget( G3_method_handle, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes());
423
424 Address G3_dmh_vmindex( G3_method_handle, java_lang_invoke_DirectMethodHandle::vmindex_offset_in_bytes());
425
426 Address G3_bmh_vmargslot( G3_method_handle, java_lang_invoke_BoundMethodHandle::vmargslot_offset_in_bytes());
427 Address G3_bmh_argument( G3_method_handle, java_lang_invoke_BoundMethodHandle::argument_offset_in_bytes());
428
429 Address G3_amh_vmargslot( G3_method_handle, java_lang_invoke_AdapterMethodHandle::vmargslot_offset_in_bytes());
430 Address G3_amh_argument ( G3_method_handle, java_lang_invoke_AdapterMethodHandle::argument_offset_in_bytes());
431 Address G3_amh_conversion(G3_method_handle, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes());
432
433 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
434
435 if (have_entry(ek)) {
436 __ nop(); // empty stubs make SG sick
437 return;
438 }
439
440 address interp_entry = __ pc();
441
442 trace_method_handle(_masm, entry_name(ek));
443
444 switch ((int) ek) {
445 case _raise_exception:
446 {
447 // Not a real MH entry, but rather shared code for raising an
448 // exception. Since we use the compiled entry, arguments are
449 // expected in compiler argument registers.
450 assert(raise_exception_method(), "must be set");
451 assert(raise_exception_method()->from_compiled_entry(), "method must be linked");
452
453 __ mov(O5_savedSP, SP); // Cut the stack back to where the caller started.
454
455 Label L_no_method;
456 // FIXME: fill in _raise_exception_method with a suitable java.lang.invoke method
457 __ set(AddressLiteral((address) &_raise_exception_method), G5_method);
458 __ ld_ptr(Address(G5_method, 0), G5_method);
459 __ tst(G5_method);
460 __ brx(Assembler::zero, false, Assembler::pn, L_no_method);
461 __ delayed()->nop();
462
463 const int jobject_oop_offset = 0;
464 __ ld_ptr(Address(G5_method, jobject_oop_offset), G5_method);
465 __ tst(G5_method);
466 __ brx(Assembler::zero, false, Assembler::pn, L_no_method);
467 __ delayed()->nop();
468
469 __ verify_oop(G5_method);
470 __ jump_indirect_to(G5_method_fce, O3_scratch); // jump to compiled entry
471 __ delayed()->nop();
472
473 // Do something that is at least causes a valid throw from the interpreter.
474 __ bind(L_no_method);
475 __ unimplemented("call throw_WrongMethodType_entry");
476 }
477 break;
478
479 case _invokestatic_mh:
480 case _invokespecial_mh:
481 {
482 __ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
483 __ verify_oop(G5_method);
484 // Same as TemplateTable::invokestatic or invokespecial,
485 // minus the CP setup and profiling:
486 if (ek == _invokespecial_mh) {
487 // Must load & check the first argument before entering the target method.
488 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
489 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
490 __ null_check(G3_method_handle);
491 __ verify_oop(G3_method_handle);
492 }
493 __ jump_indirect_to(G5_method_fie, O1_scratch);
494 __ delayed()->nop();
495 }
496 break;
497
498 case _invokevirtual_mh:
499 {
500 // Same as TemplateTable::invokevirtual,
501 // minus the CP setup and profiling:
502
503 // Pick out the vtable index and receiver offset from the MH,
504 // and then we can discard it:
505 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
506 __ ldsw(G3_dmh_vmindex, G5_index);
507 // Note: The verifier allows us to ignore G3_mh_vmtarget.
508 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
509 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
510
511 // Get receiver klass:
512 Register O0_klass = O0_argslot;
513 __ load_klass(G3_method_handle, O0_klass);
514 __ verify_oop(O0_klass);
515
516 // Get target methodOop & entry point:
517 const int base = instanceKlass::vtable_start_offset() * wordSize;
518 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
519
520 __ sll_ptr(G5_index, LogBytesPerWord, G5_index);
521 __ add(O0_klass, G5_index, O0_klass);
522 Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
523 __ ld_ptr(vtable_entry_addr, G5_method);
524
525 __ verify_oop(G5_method);
526 __ jump_indirect_to(G5_method_fie, O1_scratch);
527 __ delayed()->nop();
528 }
529 break;
530
531 case _invokeinterface_mh:
532 {
533 // Same as TemplateTable::invokeinterface,
534 // minus the CP setup and profiling:
535 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
536 Register O1_intf = O1_scratch;
537 __ load_heap_oop(G3_mh_vmtarget, O1_intf);
538 __ ldsw(G3_dmh_vmindex, G5_index);
539 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
540 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
541
542 // Get receiver klass:
543 Register O0_klass = O0_argslot;
544 __ load_klass(G3_method_handle, O0_klass);
545 __ verify_oop(O0_klass);
546
547 // Get interface:
548 Label no_such_interface;
549 __ verify_oop(O1_intf);
550 __ lookup_interface_method(O0_klass, O1_intf,
551 // Note: next two args must be the same:
552 G5_index, G5_method,
553 O2_scratch,
554 O3_scratch,
555 no_such_interface);
556
557 __ verify_oop(G5_method);
558 __ jump_indirect_to(G5_method_fie, O1_scratch);
559 __ delayed()->nop();
560
561 __ bind(no_such_interface);
562 // Throw an exception.
563 // For historical reasons, it will be IncompatibleClassChangeError.
564 __ unimplemented("not tested yet");
565 __ ld_ptr(Address(O1_intf, java_mirror_offset), O2_required); // required interface
566 __ mov( O0_klass, O1_actual); // bad receiver
567 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
568 __ delayed()->mov(Bytecodes::_invokeinterface, O0_code); // who is complaining?
569 }
570 break;
571
572 case _bound_ref_mh:
573 case _bound_int_mh:
574 case _bound_long_mh:
575 case _bound_ref_direct_mh:
576 case _bound_int_direct_mh:
577 case _bound_long_direct_mh:
578 {
579 const bool direct_to_method = (ek >= _bound_ref_direct_mh);
580 BasicType arg_type = T_ILLEGAL;
581 int arg_mask = _INSERT_NO_MASK;
582 int arg_slots = -1;
583 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
584
585 // Make room for the new argument:
586 __ ldsw(G3_bmh_vmargslot, O0_argslot);
587 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
588
589 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, O0_argslot, O1_scratch, O2_scratch, G5_index);
590
591 // Store bound argument into the new stack slot:
592 __ load_heap_oop(G3_bmh_argument, O1_scratch);
593 if (arg_type == T_OBJECT) {
594 __ st_ptr(O1_scratch, Address(O0_argslot, 0));
595 } else {
596 Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
597 const int arg_size = type2aelembytes(arg_type);
598 __ load_sized_value(prim_value_addr, O2_scratch, arg_size, is_signed_subword_type(arg_type));
599 __ store_sized_value(O2_scratch, Address(O0_argslot, 0), arg_size); // long store uses O2/O3 on !_LP64
600 }
601
602 if (direct_to_method) {
603 __ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
604 __ verify_oop(G5_method);
605 __ jump_indirect_to(G5_method_fie, O1_scratch);
606 __ delayed()->nop();
607 } else {
608 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
609 __ verify_oop(G3_method_handle);
610 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
611 }
612 }
613 break;
614
615 case _adapter_retype_only:
616 case _adapter_retype_raw:
617 // Immediately jump to the next MH layer:
618 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
619 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
620 // This is OK when all parameter types widen.
621 // It is also OK when a return type narrows.
622 break;
623
624 case _adapter_check_cast:
625 {
626 // Temps:
627 Register G5_klass = G5_index; // Interesting AMH data.
628
629 // Check a reference argument before jumping to the next layer of MH:
630 __ ldsw(G3_amh_vmargslot, O0_argslot);
631 Address vmarg = __ argument_address(O0_argslot);
632
633 // What class are we casting to?
634 __ load_heap_oop(G3_amh_argument, G5_klass); // This is a Class object!
635 __ load_heap_oop(Address(G5_klass, java_lang_Class::klass_offset_in_bytes()), G5_klass);
636
637 Label done;
638 __ ld_ptr(vmarg, O1_scratch);
639 __ tst(O1_scratch);
640 __ brx(Assembler::zero, false, Assembler::pn, done); // No cast if null.
641 __ delayed()->nop();
642 __ load_klass(O1_scratch, O1_scratch);
643
644 // Live at this point:
645 // - G5_klass : klass required by the target method
646 // - O1_scratch : argument klass to test
647 // - G3_method_handle: adapter method handle
648 __ check_klass_subtype(O1_scratch, G5_klass, O0_argslot, O2_scratch, done);
649
650 // If we get here, the type check failed!
651 __ load_heap_oop(G3_amh_argument, O2_required); // required class
652 __ ld_ptr( vmarg, O1_actual); // bad object
653 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
654 __ delayed()->mov(Bytecodes::_checkcast, O0_code); // who is complaining?
655
656 __ bind(done);
657 // Get the new MH:
658 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
659 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
660 }
661 break;
662
663 case _adapter_prim_to_prim:
664 case _adapter_ref_to_prim:
665 // Handled completely by optimized cases.
666 __ stop("init_AdapterMethodHandle should not issue this");
667 break;
668
669 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
670 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
671 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
672 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
673 {
674 // Perform an in-place conversion to int or an int subword.
675 __ ldsw(G3_amh_vmargslot, O0_argslot);
676 Address value;
677 Address vmarg = __ argument_address(O0_argslot);
678 bool value_left_justified = false;
679
680 switch (ek) {
681 case _adapter_opt_i2i:
682 value = vmarg;
683 break;
684 case _adapter_opt_l2i:
685 {
686 // just delete the extra slot
687 #ifdef _LP64
688 // In V9, longs are given 2 64-bit slots in the interpreter, but the
689 // data is passed in only 1 slot.
690 // Keep the second slot.
691 __ add(Gargs, __ argument_offset(O0_argslot, -1), O0_argslot);
692 remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
693 value = Address(O0_argslot, 4); // Get least-significant 32-bit of 64-bit value.
694 vmarg = Address(O0_argslot, Interpreter::stackElementSize);
695 #else
696 // Keep the first slot.
697 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
698 remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
699 value = Address(O0_argslot, 0);
700 vmarg = value;
701 #endif
702 }
703 break;
704 case _adapter_opt_unboxi:
705 {
706 // Load the value up from the heap.
707 __ ld_ptr(vmarg, O1_scratch);
708 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
709 #ifdef ASSERT
710 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
711 if (is_subword_type(BasicType(bt)))
712 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
713 }
714 #endif
715 __ null_check(O1_scratch, value_offset);
716 value = Address(O1_scratch, value_offset);
717 #ifdef _BIG_ENDIAN
718 // Values stored in objects are packed.
719 value_left_justified = true;
720 #endif
721 }
722 break;
723 default:
724 ShouldNotReachHere();
725 }
726
727 // This check is required on _BIG_ENDIAN
728 Register G5_vminfo = G5_index;
729 __ ldsw(G3_amh_conversion, G5_vminfo);
730 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
731
732 // Original 32-bit vmdata word must be of this form:
733 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
734 __ lduw(value, O1_scratch);
735 if (!value_left_justified)
736 __ sll(O1_scratch, G5_vminfo, O1_scratch);
737 Label zero_extend, done;
738 __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
739 __ br(Assembler::zero, false, Assembler::pn, zero_extend);
740 __ delayed()->nop();
741
742 // this path is taken for int->byte, int->short
743 __ sra(O1_scratch, G5_vminfo, O1_scratch);
744 __ ba(false, done);
745 __ delayed()->nop();
746
747 __ bind(zero_extend);
748 // this is taken for int->char
749 __ srl(O1_scratch, G5_vminfo, O1_scratch);
750
751 __ bind(done);
752 __ st(O1_scratch, vmarg);
753
754 // Get the new MH:
755 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
756 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
757 }
758 break;
759
760 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
761 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
762 {
763 // Perform an in-place int-to-long or ref-to-long conversion.
764 __ ldsw(G3_amh_vmargslot, O0_argslot);
765
766 // On big-endian machine we duplicate the slot and store the MSW
767 // in the first slot.
768 __ add(Gargs, __ argument_offset(O0_argslot, 1), O0_argslot);
769
770 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK, O0_argslot, O1_scratch, O2_scratch, G5_index);
771
772 Address arg_lsw(O0_argslot, 0);
773 Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
774
775 switch (ek) {
776 case _adapter_opt_i2l:
777 {
778 #ifdef _LP64
779 __ ldsw(arg_lsw, O2_scratch); // Load LSW sign-extended
780 #else
781 __ ldsw(arg_lsw, O3_scratch); // Load LSW sign-extended
782 __ srlx(O3_scratch, BitsPerInt, O2_scratch); // Move MSW value to lower 32-bits for std
783 #endif
784 __ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
785 }
786 break;
787 case _adapter_opt_unboxl:
788 {
789 // Load the value up from the heap.
790 __ ld_ptr(arg_lsw, O1_scratch);
791 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
792 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
793 __ null_check(O1_scratch, value_offset);
794 __ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
795 __ st_long(O2_scratch, arg_msw);
796 }
797 break;
798 default:
799 ShouldNotReachHere();
800 }
801
802 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
803 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
804 }
805 break;
806
807 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
808 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
809 {
810 // perform an in-place floating primitive conversion
811 __ unimplemented(entry_name(ek));
812 }
813 break;
814
815 case _adapter_prim_to_ref:
816 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
817 break;
818
819 case _adapter_swap_args:
820 case _adapter_rot_args:
821 // handled completely by optimized cases
822 __ stop("init_AdapterMethodHandle should not issue this");
823 break;
824
825 case _adapter_opt_swap_1:
826 case _adapter_opt_swap_2:
827 case _adapter_opt_rot_1_up:
828 case _adapter_opt_rot_1_down:
829 case _adapter_opt_rot_2_up:
830 case _adapter_opt_rot_2_down:
831 {
832 int swap_bytes = 0, rotate = 0;
833 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
834
835 // 'argslot' is the position of the first argument to swap.
836 __ ldsw(G3_amh_vmargslot, O0_argslot);
837 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
838
839 // 'vminfo' is the second.
840 Register O1_destslot = O1_scratch;
841 __ ldsw(G3_amh_conversion, O1_destslot);
842 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
843 __ and3(O1_destslot, CONV_VMINFO_MASK, O1_destslot);
844 __ add(Gargs, __ argument_offset(O1_destslot), O1_destslot);
845
846 if (!rotate) {
847 for (int i = 0; i < swap_bytes; i += wordSize) {
848 __ ld_ptr(Address(O0_argslot, i), O2_scratch);
849 __ ld_ptr(Address(O1_destslot, i), O3_scratch);
850 __ st_ptr(O3_scratch, Address(O0_argslot, i));
851 __ st_ptr(O2_scratch, Address(O1_destslot, i));
852 }
853 } else {
854 // Save the first chunk, which is going to get overwritten.
855 switch (swap_bytes) {
856 case 4 : __ lduw(Address(O0_argslot, 0), O2_scratch); break;
857 case 16: __ ldx( Address(O0_argslot, 8), O3_scratch); //fall-thru
858 case 8 : __ ldx( Address(O0_argslot, 0), O2_scratch); break;
859 default: ShouldNotReachHere();
860 }
861
862 if (rotate > 0) {
863 // Rorate upward.
864 __ sub(O0_argslot, swap_bytes, O0_argslot);
865 #if ASSERT
866 {
867 // Verify that argslot > destslot, by at least swap_bytes.
868 Label L_ok;
869 __ cmp(O0_argslot, O1_destslot);
870 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok);
871 __ delayed()->nop();
872 __ stop("source must be above destination (upward rotation)");
873 __ bind(L_ok);
874 }
875 #endif
876 // Work argslot down to destslot, copying contiguous data upwards.
877 // Pseudo-code:
878 // argslot = src_addr - swap_bytes
879 // destslot = dest_addr
880 // while (argslot >= destslot) {
881 // *(argslot + swap_bytes) = *(argslot + 0);
882 // argslot--;
883 // }
884 Label loop;
885 __ bind(loop);
886 __ ld_ptr(Address(O0_argslot, 0), G5_index);
887 __ st_ptr(G5_index, Address(O0_argslot, swap_bytes));
888 __ sub(O0_argslot, wordSize, O0_argslot);
889 __ cmp(O0_argslot, O1_destslot);
890 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, loop);
891 __ delayed()->nop(); // FILLME
892 } else {
893 __ add(O0_argslot, swap_bytes, O0_argslot);
894 #if ASSERT
895 {
896 // Verify that argslot < destslot, by at least swap_bytes.
897 Label L_ok;
898 __ cmp(O0_argslot, O1_destslot);
899 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
900 __ delayed()->nop();
901 __ stop("source must be above destination (upward rotation)");
902 __ bind(L_ok);
903 }
904 #endif
905 // Work argslot up to destslot, copying contiguous data downwards.
906 // Pseudo-code:
907 // argslot = src_addr + swap_bytes
908 // destslot = dest_addr
909 // while (argslot >= destslot) {
910 // *(argslot - swap_bytes) = *(argslot + 0);
911 // argslot++;
912 // }
913 Label loop;
914 __ bind(loop);
915 __ ld_ptr(Address(O0_argslot, 0), G5_index);
916 __ st_ptr(G5_index, Address(O0_argslot, -swap_bytes));
917 __ add(O0_argslot, wordSize, O0_argslot);
918 __ cmp(O0_argslot, O1_destslot);
919 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, loop);
920 __ delayed()->nop(); // FILLME
921 }
922
923 // Store the original first chunk into the destination slot, now free.
924 switch (swap_bytes) {
925 case 4 : __ stw(O2_scratch, Address(O1_destslot, 0)); break;
926 case 16: __ stx(O3_scratch, Address(O1_destslot, 8)); // fall-thru
927 case 8 : __ stx(O2_scratch, Address(O1_destslot, 0)); break;
928 default: ShouldNotReachHere();
929 }
930 }
931
932 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
933 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
934 }
935 break;
936
937 case _adapter_dup_args:
938 {
939 // 'argslot' is the position of the first argument to duplicate.
940 __ ldsw(G3_amh_vmargslot, O0_argslot);
941 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
942
943 // 'stack_move' is negative number of words to duplicate.
944 Register G5_stack_move = G5_index;
945 __ ldsw(G3_amh_conversion, G5_stack_move);
946 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
947
948 // Remember the old Gargs (argslot[0]).
949 Register O1_oldarg = O1_scratch;
950 __ mov(Gargs, O1_oldarg);
951
952 // Move Gargs down to make room for dups.
953 __ sll_ptr(G5_stack_move, LogBytesPerWord, G5_stack_move);
954 __ add(Gargs, G5_stack_move, Gargs);
955
956 // Compute the new Gargs (argslot[0]).
957 Register O2_newarg = O2_scratch;
958 __ mov(Gargs, O2_newarg);
959
960 // Copy from oldarg[0...] down to newarg[0...]
961 // Pseude-code:
962 // O1_oldarg = old-Gargs
963 // O2_newarg = new-Gargs
964 // O0_argslot = argslot
965 // while (O2_newarg < O1_oldarg) *O2_newarg = *O0_argslot++
966 Label loop;
967 __ bind(loop);
968 __ ld_ptr(Address(O0_argslot, 0), O3_scratch);
969 __ st_ptr(O3_scratch, Address(O2_newarg, 0));
970 __ add(O0_argslot, wordSize, O0_argslot);
971 __ add(O2_newarg, wordSize, O2_newarg);
972 __ cmp(O2_newarg, O1_oldarg);
973 __ brx(Assembler::less, false, Assembler::pt, loop);
974 __ delayed()->nop(); // FILLME
975
976 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
977 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
978 }
979 break;
980
981 case _adapter_drop_args:
982 {
983 // 'argslot' is the position of the first argument to nuke.
984 __ ldsw(G3_amh_vmargslot, O0_argslot);
985 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
986
987 // 'stack_move' is number of words to drop.
988 Register G5_stack_move = G5_index;
989 __ ldsw(G3_amh_conversion, G5_stack_move);
990 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
991
992 remove_arg_slots(_masm, G5_stack_move, O0_argslot, O1_scratch, O2_scratch, O3_scratch);
993
994 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
995 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
996 }
997 break;
998
999 case _adapter_collect_args:
1000 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1001 break;
1002
1003 case _adapter_spread_args:
1004 // Handled completely by optimized cases.
1005 __ stop("init_AdapterMethodHandle should not issue this");
1006 break;
1007
1008 case _adapter_opt_spread_0:
1009 case _adapter_opt_spread_1:
1010 case _adapter_opt_spread_more:
1011 {
1012 // spread an array out into a group of arguments
1013 __ unimplemented(entry_name(ek));
1014 }
1015 break;
1016
1017 case _adapter_flyby:
1018 case _adapter_ricochet:
1019 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1020 break;
1021
1022 default:
1023 ShouldNotReachHere();
1024 }
1025
1026 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1027 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1028
1029 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1030 }