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/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_dyn_MethodType::form_offset_in_bytes, O1_scratch)), O4_argslot);
116 __ ldsw( Address(O4_argslot, __ delayed_value(java_dyn_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_dyn_MethodType::form_offset_in_bytes, O1_scratch)), O2_form);
145 // load_heap_oop(Address(O2_form, __ delayed_value(java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes, O1_scratch)), O3_adapter);
146 // deal with old JDK versions:
147 __ add( Address(O2_form, __ delayed_value(java_dyn_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<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
380 |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
381 |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
382 |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
383 |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
384 |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
385 |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
386 |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
387 |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
388 //|(1<<sun_dyn_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, TRAPS) {
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_dyn_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
421 Address G3_mh_vmtarget( G3_method_handle, java_dyn_MethodHandle::vmtarget_offset_in_bytes());
422
423 Address G3_dmh_vmindex( G3_method_handle, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes());
424
425 Address G3_bmh_vmargslot( G3_method_handle, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes());
426 Address G3_bmh_argument( G3_method_handle, sun_dyn_BoundMethodHandle::argument_offset_in_bytes());
427
428 Address G3_amh_vmargslot( G3_method_handle, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes());
429 Address G3_amh_argument ( G3_method_handle, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes());
430 Address G3_amh_conversion(G3_method_handle, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes());
431
432 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
433
434 if (have_entry(ek)) {
435 __ nop(); // empty stubs make SG sick
436 return;
437 }
438
439 address interp_entry = __ pc();
440
441 trace_method_handle(_masm, entry_name(ek));
442
443 switch ((int) ek) {
444 case _raise_exception:
445 {
446 // Not a real MH entry, but rather shared code for raising an
447 // exception. Since we use a C2I adapter to set up the
448 // interpreter state, arguments are expected in compiler
449 // argument registers.
450 methodHandle mh(raise_exception_method());
451 address c2i_entry = methodOopDesc::make_adapters(mh, CATCH);
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 sun.dyn 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_to(AddressLiteral(c2i_entry), O3_scratch);
471 __ delayed()->nop();
472
473 // If we get here, the Java runtime did not do its job of creating the exception.
474 // Do something that is at least causes a valid throw from the interpreter.
475 __ bind(L_no_method);
476 __ unimplemented("call throw_WrongMethodType_entry");
477 }
478 break;
479
480 case _invokestatic_mh:
481 case _invokespecial_mh:
482 {
483 __ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
484 __ verify_oop(G5_method);
485 // Same as TemplateTable::invokestatic or invokespecial,
486 // minus the CP setup and profiling:
487 if (ek == _invokespecial_mh) {
488 // Must load & check the first argument before entering the target method.
489 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
490 __ ld_ptr(__ argument_address(O0_argslot), G3_method_handle);
491 __ null_check(G3_method_handle);
492 __ verify_oop(G3_method_handle);
493 }
494 __ jump_indirect_to(G5_method_fie, O1_scratch);
495 __ delayed()->nop();
496 }
497 break;
498
499 case _invokevirtual_mh:
500 {
501 // Same as TemplateTable::invokevirtual,
502 // minus the CP setup and profiling:
503
504 // Pick out the vtable index and receiver offset from the MH,
505 // and then we can discard it:
506 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
507 __ ldsw(G3_dmh_vmindex, G5_index);
508 // Note: The verifier allows us to ignore G3_mh_vmtarget.
509 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
510 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
511
512 // Get receiver klass:
513 Register O0_klass = O0_argslot;
514 __ load_klass(G3_method_handle, O0_klass);
515 __ verify_oop(O0_klass);
516
517 // Get target methodOop & entry point:
518 const int base = instanceKlass::vtable_start_offset() * wordSize;
519 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
520
521 __ sll_ptr(G5_index, LogBytesPerWord, G5_index);
522 __ add(O0_klass, G5_index, O0_klass);
523 Address vtable_entry_addr(O0_klass, base + vtableEntry::method_offset_in_bytes());
524 __ ld_ptr(vtable_entry_addr, G5_method);
525
526 __ verify_oop(G5_method);
527 __ jump_indirect_to(G5_method_fie, O1_scratch);
528 __ delayed()->nop();
529 }
530 break;
531
532 case _invokeinterface_mh:
533 {
534 // Same as TemplateTable::invokeinterface,
535 // minus the CP setup and profiling:
536 __ load_method_handle_vmslots(O0_argslot, G3_method_handle, O1_scratch);
537 Register O1_intf = O1_scratch;
538 __ load_heap_oop(G3_mh_vmtarget, O1_intf);
539 __ ldsw(G3_dmh_vmindex, G5_index);
540 __ ld_ptr(__ argument_address(O0_argslot, -1), G3_method_handle);
541 __ null_check(G3_method_handle, oopDesc::klass_offset_in_bytes());
542
543 // Get receiver klass:
544 Register O0_klass = O0_argslot;
545 __ load_klass(G3_method_handle, O0_klass);
546 __ verify_oop(O0_klass);
547
548 // Get interface:
549 Label no_such_interface;
550 __ verify_oop(O1_intf);
551 __ lookup_interface_method(O0_klass, O1_intf,
552 // Note: next two args must be the same:
553 G5_index, G5_method,
554 O2_scratch,
555 O3_scratch,
556 no_such_interface);
557
558 __ verify_oop(G5_method);
559 __ jump_indirect_to(G5_method_fie, O1_scratch);
560 __ delayed()->nop();
561
562 __ bind(no_such_interface);
563 // Throw an exception.
564 // For historical reasons, it will be IncompatibleClassChangeError.
565 __ unimplemented("not tested yet");
566 __ ld_ptr(Address(O1_intf, java_mirror_offset), O2_required); // required interface
567 __ mov( O0_klass, O1_actual); // bad receiver
568 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
569 __ delayed()->mov(Bytecodes::_invokeinterface, O0_code); // who is complaining?
570 }
571 break;
572
573 case _bound_ref_mh:
574 case _bound_int_mh:
575 case _bound_long_mh:
576 case _bound_ref_direct_mh:
577 case _bound_int_direct_mh:
578 case _bound_long_direct_mh:
579 {
580 const bool direct_to_method = (ek >= _bound_ref_direct_mh);
581 BasicType arg_type = T_ILLEGAL;
582 int arg_mask = _INSERT_NO_MASK;
583 int arg_slots = -1;
584 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
585
586 // Make room for the new argument:
587 __ ldsw(G3_bmh_vmargslot, O0_argslot);
588 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
589
590 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, O0_argslot, O1_scratch, O2_scratch, G5_index);
591
592 // Store bound argument into the new stack slot:
593 __ load_heap_oop(G3_bmh_argument, O1_scratch);
594 if (arg_type == T_OBJECT) {
595 __ st_ptr(O1_scratch, Address(O0_argslot, 0));
596 } else {
597 Address prim_value_addr(O1_scratch, java_lang_boxing_object::value_offset_in_bytes(arg_type));
598 __ load_sized_value(prim_value_addr, O2_scratch, type2aelembytes(arg_type), is_signed_subword_type(arg_type));
599 if (arg_slots == 2) {
600 __ unimplemented("not yet tested");
601 #ifndef _LP64
602 __ signx(O2_scratch, O3_scratch); // Sign extend
603 #endif
604 __ st_long(O2_scratch, Address(O0_argslot, 0)); // Uses O2/O3 on !_LP64
605 } else {
606 __ st_ptr( O2_scratch, Address(O0_argslot, 0));
607 }
608 }
609
610 if (direct_to_method) {
611 __ load_heap_oop(G3_mh_vmtarget, G5_method); // target is a methodOop
612 __ verify_oop(G5_method);
613 __ jump_indirect_to(G5_method_fie, O1_scratch);
614 __ delayed()->nop();
615 } else {
616 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle); // target is a methodOop
617 __ verify_oop(G3_method_handle);
618 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
619 }
620 }
621 break;
622
623 case _adapter_retype_only:
624 case _adapter_retype_raw:
625 // Immediately jump to the next MH layer:
626 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
627 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
628 // This is OK when all parameter types widen.
629 // It is also OK when a return type narrows.
630 break;
631
632 case _adapter_check_cast:
633 {
634 // Temps:
635 Register G5_klass = G5_index; // Interesting AMH data.
636
637 // Check a reference argument before jumping to the next layer of MH:
638 __ ldsw(G3_amh_vmargslot, O0_argslot);
639 Address vmarg = __ argument_address(O0_argslot);
640
641 // What class are we casting to?
642 __ load_heap_oop(G3_amh_argument, G5_klass); // This is a Class object!
643 __ load_heap_oop(Address(G5_klass, java_lang_Class::klass_offset_in_bytes()), G5_klass);
644
645 Label done;
646 __ ld_ptr(vmarg, O1_scratch);
647 __ tst(O1_scratch);
648 __ brx(Assembler::zero, false, Assembler::pn, done); // No cast if null.
649 __ delayed()->nop();
650 __ load_klass(O1_scratch, O1_scratch);
651
652 // Live at this point:
653 // - G5_klass : klass required by the target method
654 // - O1_scratch : argument klass to test
655 // - G3_method_handle: adapter method handle
656 __ check_klass_subtype(O1_scratch, G5_klass, O0_argslot, O2_scratch, done);
657
658 // If we get here, the type check failed!
659 __ load_heap_oop(G3_amh_argument, O2_required); // required class
660 __ ld_ptr( vmarg, O1_actual); // bad object
661 __ jump_to(AddressLiteral(from_interpreted_entry(_raise_exception)), O3_scratch);
662 __ delayed()->mov(Bytecodes::_checkcast, O0_code); // who is complaining?
663
664 __ bind(done);
665 // Get the new MH:
666 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
667 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
668 }
669 break;
670
671 case _adapter_prim_to_prim:
672 case _adapter_ref_to_prim:
673 // Handled completely by optimized cases.
674 __ stop("init_AdapterMethodHandle should not issue this");
675 break;
676
677 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
678 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
679 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
680 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
681 {
682 // Perform an in-place conversion to int or an int subword.
683 __ ldsw(G3_amh_vmargslot, O0_argslot);
684 Address value;
685 Address vmarg = __ argument_address(O0_argslot);
686 bool value_left_justified = false;
687
688 switch (ek) {
689 case _adapter_opt_i2i:
690 value = vmarg;
691 break;
692 case _adapter_opt_l2i:
693 {
694 // just delete the extra slot
695 #ifdef _LP64
696 // In V9, longs are given 2 64-bit slots in the interpreter, but the
697 // data is passed in only 1 slot.
698 // Keep the second slot.
699 __ add(Gargs, __ argument_offset(O0_argslot, -1), O0_argslot);
700 remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
701 value = Address(O0_argslot, 4); // Get least-significant 32-bit of 64-bit value.
702 vmarg = Address(O0_argslot, Interpreter::stackElementSize);
703 #else
704 // Keep the first slot.
705 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
706 remove_arg_slots(_masm, -stack_move_unit(), O0_argslot, O1_scratch, O2_scratch, O3_scratch);
707 value = Address(O0_argslot, 0);
708 vmarg = value;
709 #endif
710 }
711 break;
712 case _adapter_opt_unboxi:
713 {
714 // Load the value up from the heap.
715 __ ld_ptr(vmarg, O1_scratch);
716 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
717 #ifdef ASSERT
718 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
719 if (is_subword_type(BasicType(bt)))
720 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
721 }
722 #endif
723 __ null_check(O1_scratch, value_offset);
724 value = Address(O1_scratch, value_offset);
725 #ifdef _BIG_ENDIAN
726 // Values stored in objects are packed.
727 value_left_justified = true;
728 #endif
729 }
730 break;
731 default:
732 ShouldNotReachHere();
733 }
734
735 // This check is required on _BIG_ENDIAN
736 Register G5_vminfo = G5_index;
737 __ ldsw(G3_amh_conversion, G5_vminfo);
738 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
739
740 // Original 32-bit vmdata word must be of this form:
741 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
742 __ lduw(value, O1_scratch);
743 if (!value_left_justified)
744 __ sll(O1_scratch, G5_vminfo, O1_scratch);
745 Label zero_extend, done;
746 __ btst(CONV_VMINFO_SIGN_FLAG, G5_vminfo);
747 __ br(Assembler::zero, false, Assembler::pn, zero_extend);
748 __ delayed()->nop();
749
750 // this path is taken for int->byte, int->short
751 __ sra(O1_scratch, G5_vminfo, O1_scratch);
752 __ ba(false, done);
753 __ delayed()->nop();
754
755 __ bind(zero_extend);
756 // this is taken for int->char
757 __ srl(O1_scratch, G5_vminfo, O1_scratch);
758
759 __ bind(done);
760 __ st(O1_scratch, vmarg);
761
762 // Get the new MH:
763 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
764 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
765 }
766 break;
767
768 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
769 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
770 {
771 // Perform an in-place int-to-long or ref-to-long conversion.
772 __ ldsw(G3_amh_vmargslot, O0_argslot);
773
774 // On big-endian machine we duplicate the slot and store the MSW
775 // in the first slot.
776 __ add(Gargs, __ argument_offset(O0_argslot, 1), O0_argslot);
777
778 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK, O0_argslot, O1_scratch, O2_scratch, G5_index);
779
780 Address arg_lsw(O0_argslot, 0);
781 Address arg_msw(O0_argslot, -Interpreter::stackElementSize);
782
783 switch (ek) {
784 case _adapter_opt_i2l:
785 {
786 __ ldsw(arg_lsw, O2_scratch); // Load LSW
787 #ifndef _LP64
788 __ signx(O2_scratch, O3_scratch); // Sign extend
789 #endif
790 __ st_long(O2_scratch, arg_msw); // Uses O2/O3 on !_LP64
791 }
792 break;
793 case _adapter_opt_unboxl:
794 {
795 // Load the value up from the heap.
796 __ ld_ptr(arg_lsw, O1_scratch);
797 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
798 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
799 __ null_check(O1_scratch, value_offset);
800 __ ld_long(Address(O1_scratch, value_offset), O2_scratch); // Uses O2/O3 on !_LP64
801 __ st_long(O2_scratch, arg_msw);
802 }
803 break;
804 default:
805 ShouldNotReachHere();
806 }
807
808 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
809 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
810 }
811 break;
812
813 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
814 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
815 {
816 // perform an in-place floating primitive conversion
817 __ unimplemented(entry_name(ek));
818 }
819 break;
820
821 case _adapter_prim_to_ref:
822 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
823 break;
824
825 case _adapter_swap_args:
826 case _adapter_rot_args:
827 // handled completely by optimized cases
828 __ stop("init_AdapterMethodHandle should not issue this");
829 break;
830
831 case _adapter_opt_swap_1:
832 case _adapter_opt_swap_2:
833 case _adapter_opt_rot_1_up:
834 case _adapter_opt_rot_1_down:
835 case _adapter_opt_rot_2_up:
836 case _adapter_opt_rot_2_down:
837 {
838 int swap_bytes = 0, rotate = 0;
839 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
840
841 // 'argslot' is the position of the first argument to swap.
842 __ ldsw(G3_amh_vmargslot, O0_argslot);
843 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
844
845 // 'vminfo' is the second.
846 Register O1_destslot = O1_scratch;
847 __ ldsw(G3_amh_conversion, O1_destslot);
848 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
849 __ and3(O1_destslot, CONV_VMINFO_MASK, O1_destslot);
850 __ add(Gargs, __ argument_offset(O1_destslot), O1_destslot);
851
852 if (!rotate) {
853 for (int i = 0; i < swap_bytes; i += wordSize) {
854 __ ld_ptr(Address(O0_argslot, i), O2_scratch);
855 __ ld_ptr(Address(O1_destslot, i), O3_scratch);
856 __ st_ptr(O3_scratch, Address(O0_argslot, i));
857 __ st_ptr(O2_scratch, Address(O1_destslot, i));
858 }
859 } else {
860 // Save the first chunk, which is going to get overwritten.
861 switch (swap_bytes) {
862 case 4 : __ lduw(Address(O0_argslot, 0), O2_scratch); break;
863 case 16: __ ldx( Address(O0_argslot, 8), O3_scratch); //fall-thru
864 case 8 : __ ldx( Address(O0_argslot, 0), O2_scratch); break;
865 default: ShouldNotReachHere();
866 }
867
868 if (rotate > 0) {
869 // Rorate upward.
870 __ sub(O0_argslot, swap_bytes, O0_argslot);
871 #if ASSERT
872 {
873 // Verify that argslot > destslot, by at least swap_bytes.
874 Label L_ok;
875 __ cmp(O0_argslot, O1_destslot);
876 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, L_ok);
877 __ delayed()->nop();
878 __ stop("source must be above destination (upward rotation)");
879 __ bind(L_ok);
880 }
881 #endif
882 // Work argslot down to destslot, copying contiguous data upwards.
883 // Pseudo-code:
884 // argslot = src_addr - swap_bytes
885 // destslot = dest_addr
886 // while (argslot >= destslot) {
887 // *(argslot + swap_bytes) = *(argslot + 0);
888 // argslot--;
889 // }
890 Label loop;
891 __ bind(loop);
892 __ ld_ptr(Address(O0_argslot, 0), G5_index);
893 __ st_ptr(G5_index, Address(O0_argslot, swap_bytes));
894 __ sub(O0_argslot, wordSize, O0_argslot);
895 __ cmp(O0_argslot, O1_destslot);
896 __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, loop);
897 __ delayed()->nop(); // FILLME
898 } else {
899 __ add(O0_argslot, swap_bytes, O0_argslot);
900 #if ASSERT
901 {
902 // Verify that argslot < destslot, by at least swap_bytes.
903 Label L_ok;
904 __ cmp(O0_argslot, O1_destslot);
905 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, L_ok);
906 __ delayed()->nop();
907 __ stop("source must be above destination (upward rotation)");
908 __ bind(L_ok);
909 }
910 #endif
911 // Work argslot up to destslot, copying contiguous data downwards.
912 // Pseudo-code:
913 // argslot = src_addr + swap_bytes
914 // destslot = dest_addr
915 // while (argslot >= destslot) {
916 // *(argslot - swap_bytes) = *(argslot + 0);
917 // argslot++;
918 // }
919 Label loop;
920 __ bind(loop);
921 __ ld_ptr(Address(O0_argslot, 0), G5_index);
922 __ st_ptr(G5_index, Address(O0_argslot, -swap_bytes));
923 __ add(O0_argslot, wordSize, O0_argslot);
924 __ cmp(O0_argslot, O1_destslot);
925 __ brx(Assembler::lessEqualUnsigned, false, Assembler::pt, loop);
926 __ delayed()->nop(); // FILLME
927 }
928
929 // Store the original first chunk into the destination slot, now free.
930 switch (swap_bytes) {
931 case 4 : __ stw(O2_scratch, Address(O1_destslot, 0)); break;
932 case 16: __ stx(O3_scratch, Address(O1_destslot, 8)); // fall-thru
933 case 8 : __ stx(O2_scratch, Address(O1_destslot, 0)); break;
934 default: ShouldNotReachHere();
935 }
936 }
937
938 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
939 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
940 }
941 break;
942
943 case _adapter_dup_args:
944 {
945 // 'argslot' is the position of the first argument to duplicate.
946 __ ldsw(G3_amh_vmargslot, O0_argslot);
947 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
948
949 // 'stack_move' is negative number of words to duplicate.
950 Register G5_stack_move = G5_index;
951 __ ldsw(G3_amh_conversion, G5_stack_move);
952 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
953
954 // Remember the old Gargs (argslot[0]).
955 Register O1_oldarg = O1_scratch;
956 __ mov(Gargs, O1_oldarg);
957
958 // Move Gargs down to make room for dups.
959 __ sll_ptr(G5_stack_move, LogBytesPerWord, G5_stack_move);
960 __ add(Gargs, G5_stack_move, Gargs);
961
962 // Compute the new Gargs (argslot[0]).
963 Register O2_newarg = O2_scratch;
964 __ mov(Gargs, O2_newarg);
965
966 // Copy from oldarg[0...] down to newarg[0...]
967 // Pseude-code:
968 // O1_oldarg = old-Gargs
969 // O2_newarg = new-Gargs
970 // O0_argslot = argslot
971 // while (O2_newarg < O1_oldarg) *O2_newarg = *O0_argslot++
972 Label loop;
973 __ bind(loop);
974 __ ld_ptr(Address(O0_argslot, 0), O3_scratch);
975 __ st_ptr(O3_scratch, Address(O2_newarg, 0));
976 __ add(O0_argslot, wordSize, O0_argslot);
977 __ add(O2_newarg, wordSize, O2_newarg);
978 __ cmp(O2_newarg, O1_oldarg);
979 __ brx(Assembler::less, false, Assembler::pt, loop);
980 __ delayed()->nop(); // FILLME
981
982 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
983 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
984 }
985 break;
986
987 case _adapter_drop_args:
988 {
989 // 'argslot' is the position of the first argument to nuke.
990 __ ldsw(G3_amh_vmargslot, O0_argslot);
991 __ add(Gargs, __ argument_offset(O0_argslot), O0_argslot);
992
993 // 'stack_move' is number of words to drop.
994 Register G5_stack_move = G5_index;
995 __ ldsw(G3_amh_conversion, G5_stack_move);
996 __ sra(G5_stack_move, CONV_STACK_MOVE_SHIFT, G5_stack_move);
997
998 remove_arg_slots(_masm, G5_stack_move, O0_argslot, O1_scratch, O2_scratch, O3_scratch);
999
1000 __ load_heap_oop(G3_mh_vmtarget, G3_method_handle);
1001 __ jump_to_method_handle_entry(G3_method_handle, O1_scratch);
1002 }
1003 break;
1004
1005 case _adapter_collect_args:
1006 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1007 break;
1008
1009 case _adapter_spread_args:
1010 // Handled completely by optimized cases.
1011 __ stop("init_AdapterMethodHandle should not issue this");
1012 break;
1013
1014 case _adapter_opt_spread_0:
1015 case _adapter_opt_spread_1:
1016 case _adapter_opt_spread_more:
1017 {
1018 // spread an array out into a group of arguments
1019 __ unimplemented(entry_name(ek));
1020 }
1021 break;
1022
1023 case _adapter_flyby:
1024 case _adapter_ricochet:
1025 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1026 break;
1027
1028 default:
1029 ShouldNotReachHere();
1030 }
1031
1032 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1033 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1034
1035 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1036 }