1 /*
2 * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2026 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26
27 #include "asm/macroAssembler.inline.hpp"
28 #include "gc/shared/barrierSet.hpp"
29 #include "gc/shared/barrierSetAssembler.hpp"
30 #include "interp_masm_ppc.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "oops/methodCounters.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/resolvedFieldEntry.hpp"
35 #include "oops/resolvedIndyEntry.hpp"
36 #include "oops/resolvedMethodEntry.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/safepointMechanism.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/vm_version.hpp"
43 #include "utilities/macros.hpp"
44 #include "utilities/powerOfTwo.hpp"
45
46 // Implementation of InterpreterMacroAssembler.
47
48 // This file specializes the assembler with interpreter-specific macros.
49
50 #ifdef PRODUCT
51 #define BLOCK_COMMENT(str) // nothing
52 #else
53 #define BLOCK_COMMENT(str) block_comment(str)
54 #endif
55
56 void InterpreterMacroAssembler::null_check_throw(Register a, int offset, Register temp_reg) {
57 address exception_entry = Interpreter::throw_NullPointerException_entry();
58 MacroAssembler::null_check_throw(a, offset, temp_reg, exception_entry);
59 }
60
61 void InterpreterMacroAssembler::load_klass_check_null_throw(Register dst, Register src, Register temp_reg) {
62 null_check_throw(src, oopDesc::klass_offset_in_bytes(), temp_reg);
63 load_klass(dst, src);
64 }
65
66 void InterpreterMacroAssembler::jump_to_entry(address entry, Register Rscratch) {
67 assert(entry, "Entry must have been generated by now");
68 if (is_within_range_of_b(entry, pc())) {
69 b(entry);
70 } else {
71 load_const_optimized(Rscratch, entry, R0);
72 mtctr(Rscratch);
73 bctr();
74 }
75 }
76
77 void InterpreterMacroAssembler::dispatch_next(TosState state, int bcp_incr, bool generate_poll) {
78 Register bytecode = R12_scratch2;
79 if (bcp_incr != 0) {
80 lbzu(bytecode, bcp_incr, R14_bcp);
81 } else {
82 lbz(bytecode, 0, R14_bcp);
83 }
84
85 dispatch_Lbyte_code(state, bytecode, Interpreter::dispatch_table(state), generate_poll);
86 }
87
88 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
89 // Load current bytecode.
90 Register bytecode = R12_scratch2;
91 lbz(bytecode, 0, R14_bcp);
92 dispatch_Lbyte_code(state, bytecode, table);
93 }
94
95 // Dispatch code executed in the prolog of a bytecode which does not do it's
96 // own dispatch. The dispatch address is computed and placed in R24_dispatch_addr.
97 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int bcp_incr) {
98 Register bytecode = R12_scratch2;
99 lbz(bytecode, bcp_incr, R14_bcp);
100
101 load_dispatch_table(R24_dispatch_addr, Interpreter::dispatch_table(state));
102
103 sldi(bytecode, bytecode, LogBytesPerWord);
104 ldx(R24_dispatch_addr, R24_dispatch_addr, bytecode);
105 }
106
107 // Dispatch code executed in the epilog of a bytecode which does not do it's
108 // own dispatch. The dispatch address in R24_dispatch_addr is used for the
109 // dispatch.
110 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int bcp_incr) {
111 assert(nonvolatile_accross_vthread_preemtion(R24_dispatch_addr),
112 "Requirement of field accesses (e.g. putstatic)");
113 if (bcp_incr) { addi(R14_bcp, R14_bcp, bcp_incr); }
114 mtctr(R24_dispatch_addr);
115 bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable);
116 }
117
118 void InterpreterMacroAssembler::check_and_handle_popframe(Register scratch_reg) {
119 assert(scratch_reg != R0, "can't use R0 as scratch_reg here");
120 if (JvmtiExport::can_pop_frame()) {
121 Label L;
122
123 // Check the "pending popframe condition" flag in the current thread.
124 lwz(scratch_reg, in_bytes(JavaThread::popframe_condition_offset()), R16_thread);
125
126 // Initiate popframe handling only if it is not already being
127 // processed. If the flag has the popframe_processing bit set, it
128 // means that this code is called *during* popframe handling - we
129 // don't want to reenter.
130 andi_(R0, scratch_reg, JavaThread::popframe_pending_bit);
131 beq(CR0, L);
132
133 andi_(R0, scratch_reg, JavaThread::popframe_processing_bit);
134 bne(CR0, L);
135
136 // Call the Interpreter::remove_activation_preserving_args_entry()
137 // func to get the address of the same-named entrypoint in the
138 // generated interpreter code.
139 call_c(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
140
141 // Jump to Interpreter::_remove_activation_preserving_args_entry.
142 mtctr(R3_RET);
143 bctr();
144
145 align(32, 12);
146 bind(L);
147 }
148 }
149
150 void InterpreterMacroAssembler::check_and_handle_earlyret(Register scratch_reg) {
151 const Register Rthr_state_addr = scratch_reg;
152 if (JvmtiExport::can_force_early_return()) {
153 Label Lno_early_ret;
154 ld(Rthr_state_addr, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread);
155 cmpdi(CR0, Rthr_state_addr, 0);
156 beq(CR0, Lno_early_ret);
157
158 lwz(R0, in_bytes(JvmtiThreadState::earlyret_state_offset()), Rthr_state_addr);
159 cmpwi(CR0, R0, JvmtiThreadState::earlyret_pending);
160 bne(CR0, Lno_early_ret);
161
162 // Jump to Interpreter::_earlyret_entry.
163 lwz(R3_ARG1, in_bytes(JvmtiThreadState::earlyret_tos_offset()), Rthr_state_addr);
164 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry));
165 mtlr(R3_RET);
166 blr();
167
168 align(32, 12);
169 bind(Lno_early_ret);
170 }
171 }
172
173 void InterpreterMacroAssembler::load_earlyret_value(TosState state, Register Rscratch1) {
174 const Register RjvmtiState = Rscratch1;
175 const Register Rscratch2 = R0;
176
177 ld(RjvmtiState, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread);
178 li(Rscratch2, 0);
179
180 switch (state) {
181 case atos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState);
182 std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState);
183 break;
184 case ltos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
185 break;
186 case btos: // fall through
187 case ztos: // fall through
188 case ctos: // fall through
189 case stos: // fall through
190 case itos: lwz(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
191 break;
192 case ftos: lfs(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
193 break;
194 case dtos: lfd(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
195 break;
196 case vtos: break;
197 default : ShouldNotReachHere();
198 }
199
200 // Clean up tos value in the jvmti thread state.
201 std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState);
202 // Set tos state field to illegal value.
203 li(Rscratch2, ilgl);
204 stw(Rscratch2, in_bytes(JvmtiThreadState::earlyret_tos_offset()), RjvmtiState);
205 }
206
207 // Common code to dispatch and dispatch_only.
208 // Dispatch value in Lbyte_code and increment Lbcp.
209
210 void InterpreterMacroAssembler::load_dispatch_table(Register dst, address* table) {
211 address table_base = (address)Interpreter::dispatch_table((TosState)0);
212 intptr_t table_offs = (intptr_t)table - (intptr_t)table_base;
213 if (is_simm16(table_offs)) {
214 addi(dst, R25_templateTableBase, (int)table_offs);
215 } else {
216 load_const_optimized(dst, table, R0);
217 }
218 }
219
220 void InterpreterMacroAssembler::dispatch_Lbyte_code(TosState state, Register bytecode,
221 address* table, bool generate_poll) {
222 assert_different_registers(bytecode, R11_scratch1);
223
224 // Calc dispatch table address.
225 load_dispatch_table(R11_scratch1, table);
226
227 if (generate_poll) {
228 address *sfpt_tbl = Interpreter::safept_table(state);
229 if (table != sfpt_tbl) {
230 Label dispatch;
231 ld(R0, in_bytes(JavaThread::polling_word_offset()), R16_thread);
232 // Armed page has poll_bit set, if poll bit is cleared just continue.
233 andi_(R0, R0, SafepointMechanism::poll_bit());
234 beq(CR0, dispatch);
235 load_dispatch_table(R11_scratch1, sfpt_tbl);
236 align(32, 16);
237 bind(dispatch);
238 }
239 }
240
241 sldi(R12_scratch2, bytecode, LogBytesPerWord);
242 ldx(R11_scratch1, R11_scratch1, R12_scratch2);
243
244 // Jump off!
245 mtctr(R11_scratch1);
246 bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable);
247 }
248
249 void InterpreterMacroAssembler::load_receiver(Register Rparam_count, Register Rrecv_dst) {
250 sldi(Rrecv_dst, Rparam_count, Interpreter::logStackElementSize);
251 ldx(Rrecv_dst, Rrecv_dst, R15_esp);
252 }
253
254 // helpers for expression stack
255
256 void InterpreterMacroAssembler::pop_i(Register r) {
257 lwzu(r, Interpreter::stackElementSize, R15_esp);
258 }
259
260 void InterpreterMacroAssembler::pop_ptr(Register r) {
261 ldu(r, Interpreter::stackElementSize, R15_esp);
262 }
263
264 void InterpreterMacroAssembler::pop_l(Register r) {
265 ld(r, Interpreter::stackElementSize, R15_esp);
266 addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize);
267 }
268
269 void InterpreterMacroAssembler::pop_f(FloatRegister f) {
270 lfsu(f, Interpreter::stackElementSize, R15_esp);
271 }
272
273 void InterpreterMacroAssembler::pop_d(FloatRegister f) {
274 lfd(f, Interpreter::stackElementSize, R15_esp);
275 addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize);
276 }
277
278 void InterpreterMacroAssembler::push_i(Register r) {
279 stw(r, 0, R15_esp);
280 addi(R15_esp, R15_esp, - Interpreter::stackElementSize );
281 }
282
283 void InterpreterMacroAssembler::push_ptr(Register r) {
284 std(r, 0, R15_esp);
285 addi(R15_esp, R15_esp, - Interpreter::stackElementSize );
286 }
287
288 void InterpreterMacroAssembler::push_l(Register r) {
289 // Clear unused slot.
290 load_const_optimized(R0, 0L);
291 std(R0, 0, R15_esp);
292 std(r, - Interpreter::stackElementSize, R15_esp);
293 addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize );
294 }
295
296 void InterpreterMacroAssembler::push_f(FloatRegister f) {
297 stfs(f, 0, R15_esp);
298 addi(R15_esp, R15_esp, - Interpreter::stackElementSize );
299 }
300
301 void InterpreterMacroAssembler::push_d(FloatRegister f) {
302 stfd(f, - Interpreter::stackElementSize, R15_esp);
303 addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize );
304 }
305
306 void InterpreterMacroAssembler::push_2ptrs(Register first, Register second) {
307 std(first, 0, R15_esp);
308 std(second, -Interpreter::stackElementSize, R15_esp);
309 addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize );
310 }
311
312 void InterpreterMacroAssembler::move_l_to_d(Register l, FloatRegister d) {
313 mtfprd(d, l);
314 }
315
316 void InterpreterMacroAssembler::move_d_to_l(FloatRegister d, Register l) {
317 mffprd(l, d);
318 }
319
320 void InterpreterMacroAssembler::push(TosState state) {
321 switch (state) {
322 case atos: push_ptr(); break;
323 case btos:
324 case ztos:
325 case ctos:
326 case stos:
327 case itos: push_i(); break;
328 case ltos: push_l(); break;
329 case ftos: push_f(); break;
330 case dtos: push_d(); break;
331 case vtos: /* nothing to do */ break;
332 default : ShouldNotReachHere();
333 }
334 }
335
336 void InterpreterMacroAssembler::pop(TosState state) {
337 switch (state) {
338 case atos: pop_ptr(); break;
339 case btos:
340 case ztos:
341 case ctos:
342 case stos:
343 case itos: pop_i(); break;
344 case ltos: pop_l(); break;
345 case ftos: pop_f(); break;
346 case dtos: pop_d(); break;
347 case vtos: /* nothing to do */ break;
348 default : ShouldNotReachHere();
349 }
350 verify_oop(R17_tos, state);
351 }
352
353 void InterpreterMacroAssembler::empty_expression_stack() {
354 addi(R15_esp, R26_monitor, - Interpreter::stackElementSize);
355 }
356
357 void InterpreterMacroAssembler::get_2_byte_integer_at_bcp(int bcp_offset,
358 Register Rdst,
359 signedOrNot is_signed) {
360 #if defined(VM_LITTLE_ENDIAN)
361 if (bcp_offset) {
362 load_const_optimized(Rdst, bcp_offset);
363 lhbrx(Rdst, R14_bcp, Rdst);
364 } else {
365 lhbrx(Rdst, R14_bcp);
366 }
367 if (is_signed == Signed) {
368 extsh(Rdst, Rdst);
369 }
370 #else
371 // Read Java big endian format.
372 if (is_signed == Signed) {
373 lha(Rdst, bcp_offset, R14_bcp);
374 } else {
375 lhz(Rdst, bcp_offset, R14_bcp);
376 }
377 #endif
378 }
379
380 void InterpreterMacroAssembler::get_4_byte_integer_at_bcp(int bcp_offset,
381 Register Rdst,
382 signedOrNot is_signed) {
383 #if defined(VM_LITTLE_ENDIAN)
384 if (bcp_offset) {
385 load_const_optimized(Rdst, bcp_offset);
386 lwbrx(Rdst, R14_bcp, Rdst);
387 } else {
388 lwbrx(Rdst, R14_bcp);
389 }
390 if (is_signed == Signed) {
391 extsw(Rdst, Rdst);
392 }
393 #else
394 // Read Java big endian format.
395 if (bcp_offset & 3) { // Offset unaligned?
396 load_const_optimized(Rdst, bcp_offset);
397 if (is_signed == Signed) {
398 lwax(Rdst, R14_bcp, Rdst);
399 } else {
400 lwzx(Rdst, R14_bcp, Rdst);
401 }
402 } else {
403 if (is_signed == Signed) {
404 lwa(Rdst, bcp_offset, R14_bcp);
405 } else {
406 lwz(Rdst, bcp_offset, R14_bcp);
407 }
408 }
409 #endif
410 }
411
412
413 // Load the constant pool cache index from the bytecode stream.
414 //
415 // Kills / writes:
416 // - Rdst, Rscratch
417 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register Rdst, int bcp_offset,
418 size_t index_size) {
419 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
420 // Cache index is always in the native format, courtesy of Rewriter.
421 if (index_size == sizeof(u2)) {
422 lhz(Rdst, bcp_offset, R14_bcp);
423 } else if (index_size == sizeof(u4)) {
424 if (bcp_offset & 3) {
425 load_const_optimized(Rdst, bcp_offset);
426 lwax(Rdst, R14_bcp, Rdst);
427 } else {
428 lwa(Rdst, bcp_offset, R14_bcp);
429 }
430 } else if (index_size == sizeof(u1)) {
431 lbz(Rdst, bcp_offset, R14_bcp);
432 } else {
433 ShouldNotReachHere();
434 }
435 // Rdst now contains cp cache index.
436 }
437
438 // Load 4-byte signed or unsigned integer in Java format (that is, big-endian format)
439 // from (Rsrc)+offset.
440 void InterpreterMacroAssembler::get_u4(Register Rdst, Register Rsrc, int offset,
441 signedOrNot is_signed) {
442 #if defined(VM_LITTLE_ENDIAN)
443 if (offset) {
444 load_const_optimized(Rdst, offset);
445 lwbrx(Rdst, Rdst, Rsrc);
446 } else {
447 lwbrx(Rdst, Rsrc);
448 }
449 if (is_signed == Signed) {
450 extsw(Rdst, Rdst);
451 }
452 #else
453 if (is_signed == Signed) {
454 lwa(Rdst, offset, Rsrc);
455 } else {
456 lwz(Rdst, offset, Rsrc);
457 }
458 #endif
459 }
460
461 void InterpreterMacroAssembler::load_resolved_indy_entry(Register cache, Register index) {
462 // Get index out of bytecode pointer
463 get_cache_index_at_bcp(index, 1, sizeof(u4));
464
465 // Get address of invokedynamic array
466 ld_ptr(cache, in_bytes(ConstantPoolCache::invokedynamic_entries_offset()), R27_constPoolCache);
467 // Scale the index to be the entry index * sizeof(ResolvedIndyEntry)
468 sldi(index, index, log2i_exact(sizeof(ResolvedIndyEntry)));
469 addi(cache, cache, Array<ResolvedIndyEntry>::base_offset_in_bytes());
470 add(cache, cache, index);
471 }
472
473 void InterpreterMacroAssembler::load_field_or_method_entry(bool is_method, Register cache, Register index, int bcp_offset, bool for_fast_bytecode) {
474 const int entry_size = is_method ? sizeof(ResolvedMethodEntry) : sizeof(ResolvedFieldEntry),
475 base_offset = is_method ? Array<ResolvedMethodEntry>::base_offset_in_bytes() : Array<ResolvedFieldEntry>::base_offset_in_bytes(),
476 entries_offset = is_method ? in_bytes(ConstantPoolCache::method_entries_offset()) : in_bytes(ConstantPoolCache::field_entries_offset());
477
478 // Get index out of bytecode pointer
479 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
480 // Take shortcut if the size is a power of 2
481 if (is_power_of_2(entry_size)) {
482 // Scale index by power of 2
483 sldi(index, index, log2i_exact(entry_size));
484 } else {
485 // Scale the index to be the entry index * sizeof(ResolvedFieldEntry)
486 mulli(index, index, entry_size);
487 }
488 // Get address of field entries array
489 ld_ptr(cache, entries_offset, R27_constPoolCache);
490 addi(cache, cache, base_offset);
491 add(cache, cache, index);
492
493 if (for_fast_bytecode) {
494 // Prevent speculative loading from ResolvedFieldEntry/ResolvedMethodEntry as it can miss the info written by another thread.
495 // TemplateTable::patch_bytecode uses release-store.
496 // We reached here via control dependency (Bytecode dispatch has used the rewritten Bytecode).
497 // So, we can use control-isync based ordering.
498 isync();
499 }
500 }
501
502 // Load object from cpool->resolved_references(index).
503 // Kills:
504 // - index
505 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result, Register index,
506 Register tmp1, Register tmp2,
507 Label *L_handle_null) {
508 assert_different_registers(result, index, tmp1, tmp2);
509 assert(index->is_nonvolatile(), "needs to survive C-call in resolve_oop_handle");
510 get_constant_pool(result);
511
512 // Convert from field index to resolved_references() index and from
513 // word index to byte offset. Since this is a java object, it can be compressed.
514 sldi(index, index, LogBytesPerHeapOop);
515 // Load pointer for resolved_references[] objArray.
516 ld(result, ConstantPool::cache_offset(), result);
517 ld(result, ConstantPoolCache::resolved_references_offset(), result);
518 resolve_oop_handle(result, tmp1, tmp2, MacroAssembler::PRESERVATION_NONE);
519 #ifdef ASSERT
520 Label index_ok;
521 lwa(R0, arrayOopDesc::length_offset_in_bytes(), result);
522 sldi(R0, R0, LogBytesPerHeapOop);
523 cmpd(CR0, index, R0);
524 blt(CR0, index_ok);
525 stop("resolved reference index out of bounds");
526 bind(index_ok);
527 #endif
528 // Add in the index.
529 add(result, index, result);
530 load_heap_oop(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT), result,
531 tmp1, tmp2,
532 MacroAssembler::PRESERVATION_NONE,
533 0, L_handle_null);
534 }
535
536 // load cpool->resolved_klass_at(index)
537 void InterpreterMacroAssembler::load_resolved_klass_at_offset(Register Rcpool, Register Roffset, Register Rklass) {
538 // int value = *(Rcpool->int_at_addr(which));
539 // int resolved_klass_index = extract_low_short_from_int(value);
540 add(Roffset, Rcpool, Roffset);
541 #if defined(VM_LITTLE_ENDIAN)
542 lhz(Roffset, sizeof(ConstantPool), Roffset); // Roffset = resolved_klass_index
543 #else
544 lhz(Roffset, sizeof(ConstantPool) + 2, Roffset); // Roffset = resolved_klass_index
545 #endif
546
547 ld(Rklass, ConstantPool::resolved_klasses_offset(), Rcpool); // Rklass = Rcpool->_resolved_klasses
548
549 sldi(Roffset, Roffset, LogBytesPerWord);
550 addi(Roffset, Roffset, Array<Klass*>::base_offset_in_bytes());
551 isync(); // Order load of instance Klass wrt. tags.
552 ldx(Rklass, Rklass, Roffset);
553 }
554
555 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
556 // a subtype of super_klass. Blows registers Rsub_klass, tmp1, tmp2.
557 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, Register Rsuper_klass, Register Rtmp1,
558 Register Rtmp2, Register Rtmp3, Label &ok_is_subtype, bool profile) {
559 // Profile the not-null value's klass.
560 if (profile) {
561 profile_typecheck(Rsub_klass, Rtmp1, Rtmp2);
562 }
563 check_klass_subtype(Rsub_klass, Rsuper_klass, Rtmp1, Rtmp2, ok_is_subtype);
564 }
565
566 // Separate these two to allow for delay slot in middle.
567 // These are used to do a test and full jump to exception-throwing code.
568
569 // Check that index is in range for array, then shift index by index_shift,
570 // and put arrayOop + shifted_index into res.
571 // Note: res is still shy of address by array offset into object.
572
573 void InterpreterMacroAssembler::index_check_without_pop(Register Rarray, Register Rindex,
574 int index_shift, Register Rtmp, Register Rres) {
575 // Check that index is in range for array, then shift index by index_shift,
576 // and put arrayOop + shifted_index into res.
577 // Note: res is still shy of address by array offset into object.
578 // Kills:
579 // - Rindex
580 // Writes:
581 // - Rres: Address that corresponds to the array index if check was successful.
582 verify_oop(Rarray);
583 const Register Rlength = R0;
584 const Register RsxtIndex = Rtmp;
585 Label LisNull, LnotOOR;
586
587 // Array nullcheck
588 if (!ImplicitNullChecks) {
589 cmpdi(CR0, Rarray, 0);
590 beq(CR0, LisNull);
591 } else {
592 null_check_throw(Rarray, arrayOopDesc::length_offset_in_bytes(), /*temp*/RsxtIndex);
593 }
594
595 // Rindex might contain garbage in upper bits (remember that we don't sign extend
596 // during integer arithmetic operations). So kill them and put value into same register
597 // where ArrayIndexOutOfBounds would expect the index in.
598 rldicl(RsxtIndex, Rindex, 0, 32); // zero extend 32 bit -> 64 bit
599
600 // Index check
601 lwz(Rlength, arrayOopDesc::length_offset_in_bytes(), Rarray);
602 cmplw(CR0, Rindex, Rlength);
603 sldi(RsxtIndex, RsxtIndex, index_shift);
604 blt(CR0, LnotOOR);
605 // Index should be in R17_tos, array should be in R4_ARG2.
606 mr_if_needed(R17_tos, Rindex);
607 mr_if_needed(R4_ARG2, Rarray);
608 load_dispatch_table(Rtmp, (address*)Interpreter::_throw_ArrayIndexOutOfBoundsException_entry);
609 mtctr(Rtmp);
610 bctr();
611
612 if (!ImplicitNullChecks) {
613 bind(LisNull);
614 load_dispatch_table(Rtmp, (address*)Interpreter::_throw_NullPointerException_entry);
615 mtctr(Rtmp);
616 bctr();
617 }
618
619 align(32, 16);
620 bind(LnotOOR);
621
622 // Calc address
623 add(Rres, RsxtIndex, Rarray);
624 }
625
626 void InterpreterMacroAssembler::index_check(Register array, Register index,
627 int index_shift, Register tmp, Register res) {
628 // pop array
629 pop_ptr(array);
630
631 // check array
632 index_check_without_pop(array, index, index_shift, tmp, res);
633 }
634
635 void InterpreterMacroAssembler::get_const(Register Rdst) {
636 ld(Rdst, in_bytes(Method::const_offset()), R19_method);
637 }
638
639 void InterpreterMacroAssembler::get_constant_pool(Register Rdst) {
640 get_const(Rdst);
641 ld(Rdst, in_bytes(ConstMethod::constants_offset()), Rdst);
642 }
643
644 void InterpreterMacroAssembler::get_constant_pool_cache(Register Rdst) {
645 get_constant_pool(Rdst);
646 ld(Rdst, ConstantPool::cache_offset(), Rdst);
647 }
648
649 void InterpreterMacroAssembler::get_cpool_and_tags(Register Rcpool, Register Rtags) {
650 get_constant_pool(Rcpool);
651 ld(Rtags, ConstantPool::tags_offset(), Rcpool);
652 }
653
654 // Unlock if synchronized method.
655 //
656 // Unlock the receiver if this is a synchronized method.
657 // Unlock any Java monitors from synchronized blocks.
658 //
659 // If there are locked Java monitors
660 // If throw_monitor_exception
661 // throws IllegalMonitorStateException
662 // Else if install_monitor_exception
663 // installs IllegalMonitorStateException
664 // Else
665 // no error processing
666 void InterpreterMacroAssembler::unlock_if_synchronized_method(TosState state,
667 bool throw_monitor_exception,
668 bool install_monitor_exception) {
669 Label Lunlocked, Lno_unlock;
670 {
671 Register Rdo_not_unlock_flag = R11_scratch1;
672 Register Raccess_flags = R12_scratch2;
673
674 // Check if synchronized method or unlocking prevented by
675 // JavaThread::do_not_unlock_if_synchronized flag.
676 lbz(Rdo_not_unlock_flag, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread);
677 lhz(Raccess_flags, in_bytes(Method::access_flags_offset()), R19_method);
678 li(R0, 0);
679 stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); // reset flag
680
681 push(state);
682
683 // Skip if we don't have to unlock.
684 testbitdi(CR0, R0, Raccess_flags, JVM_ACC_SYNCHRONIZED_BIT);
685 beq(CR0, Lunlocked);
686
687 cmpwi(CR0, Rdo_not_unlock_flag, 0);
688 bne(CR0, Lno_unlock);
689 }
690
691 // Unlock
692 {
693 Register Rmonitor_base = R11_scratch1;
694
695 Label Lunlock;
696 // If it's still locked, everything is ok, unlock it.
697 ld(Rmonitor_base, 0, R1_SP);
698 addi(Rmonitor_base, Rmonitor_base,
699 -(frame::ijava_state_size + frame::interpreter_frame_monitor_size_in_bytes())); // Monitor base
700
701 ld(R0, BasicObjectLock::obj_offset(), Rmonitor_base);
702 cmpdi(CR0, R0, 0);
703 bne(CR0, Lunlock);
704
705 // If it's already unlocked, throw exception.
706 if (throw_monitor_exception) {
707 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
708 should_not_reach_here();
709 } else {
710 if (install_monitor_exception) {
711 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
712 b(Lunlocked);
713 }
714 }
715
716 bind(Lunlock);
717 unlock_object(Rmonitor_base);
718 }
719
720 // Check that all other monitors are unlocked. Throw IllegelMonitorState exception if not.
721 bind(Lunlocked);
722 {
723 Label Lexception, Lrestart;
724 Register Rcurrent_obj_addr = R11_scratch1;
725 const int delta = frame::interpreter_frame_monitor_size_in_bytes();
726 assert((delta & LongAlignmentMask) == 0, "sizeof BasicObjectLock must be even number of doublewords");
727
728 bind(Lrestart);
729 // Set up search loop: Calc num of iterations.
730 {
731 Register Riterations = R12_scratch2;
732 Register Rmonitor_base = Rcurrent_obj_addr;
733 ld(Rmonitor_base, 0, R1_SP);
734 addi(Rmonitor_base, Rmonitor_base, - frame::ijava_state_size); // Monitor base
735
736 subf_(Riterations, R26_monitor, Rmonitor_base);
737 ble(CR0, Lno_unlock);
738
739 addi(Rcurrent_obj_addr, Rmonitor_base,
740 in_bytes(BasicObjectLock::obj_offset()) - frame::interpreter_frame_monitor_size_in_bytes());
741 // Check if any monitor is on stack, bail out if not
742 srdi(Riterations, Riterations, exact_log2(delta));
743 mtctr(Riterations);
744 }
745
746 // The search loop: Look for locked monitors.
747 {
748 const Register Rcurrent_obj = R0;
749 Label Lloop;
750
751 ld(Rcurrent_obj, 0, Rcurrent_obj_addr);
752 addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta);
753 bind(Lloop);
754
755 // Check if current entry is used.
756 cmpdi(CR0, Rcurrent_obj, 0);
757 bne(CR0, Lexception);
758 // Preload next iteration's compare value.
759 ld(Rcurrent_obj, 0, Rcurrent_obj_addr);
760 addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta);
761 bdnz(Lloop);
762 }
763 // Fell through: Everything's unlocked => finish.
764 b(Lno_unlock);
765
766 // An object is still locked => need to throw exception.
767 bind(Lexception);
768 if (throw_monitor_exception) {
769 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
770 should_not_reach_here();
771 } else {
772 // Stack unrolling. Unlock object and if requested, install illegal_monitor_exception.
773 // Unlock does not block, so don't have to worry about the frame.
774 Register Rmonitor_addr = R11_scratch1;
775 addi(Rmonitor_addr, Rcurrent_obj_addr, -in_bytes(BasicObjectLock::obj_offset()) + delta);
776 unlock_object(Rmonitor_addr);
777 if (install_monitor_exception) {
778 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
779 }
780 b(Lrestart);
781 }
782 }
783
784 align(32, 12);
785 bind(Lno_unlock);
786 pop(state);
787 }
788
789 // Support function for remove_activation & Co.
790 void InterpreterMacroAssembler::load_fp(Register fp) {
791 ld(fp, _abi0(callers_sp), R1_SP); // *SP
792 }
793
794 void InterpreterMacroAssembler::remove_top_frame_given_fp(Register fp, Register sender_sp, Register sender_fp,
795 Register return_pc, Register temp) {
796 assert_different_registers(sender_sp, sender_fp, return_pc, temp);
797 ld(sender_sp, _ijava_state_neg(sender_sp), fp);
798 ld(sender_fp, _abi0(callers_sp), fp); // **SP
799 if (return_pc != noreg) {
800 ld(return_pc, _abi0(lr), fp); // last usage of fp, register can be reused
801 }
802 subf(temp, R1_SP, sender_sp); // sender_sp - SP
803 stdux(sender_fp, R1_SP, temp); // atomically set *(SP = sender_sp) = sender_fp
804 }
805
806 void InterpreterMacroAssembler::merge_frames(Register sender_sp, Register return_pc,
807 Register temp1, Register temp2) {
808 Register fp = temp1, sender_fp = temp2;
809 load_fp(fp);
810 remove_top_frame_given_fp(fp, sender_sp, sender_fp, return_pc, /* temp */ fp);
811 }
812
813 void InterpreterMacroAssembler::narrow(Register result) {
814 Register ret_type = R11_scratch1;
815 ld(R11_scratch1, in_bytes(Method::const_offset()), R19_method);
816 lbz(ret_type, in_bytes(ConstMethod::result_type_offset()), R11_scratch1);
817
818 Label notBool, notByte, notChar, done;
819
820 // common case first
821 cmpwi(CR0, ret_type, T_INT);
822 beq(CR0, done);
823
824 cmpwi(CR0, ret_type, T_BOOLEAN);
825 bne(CR0, notBool);
826 andi(result, result, 0x1);
827 b(done);
828
829 bind(notBool);
830 cmpwi(CR0, ret_type, T_BYTE);
831 bne(CR0, notByte);
832 extsb(result, result);
833 b(done);
834
835 bind(notByte);
836 cmpwi(CR0, ret_type, T_CHAR);
837 bne(CR0, notChar);
838 andi(result, result, 0xffff);
839 b(done);
840
841 bind(notChar);
842 // cmpwi(CR0, ret_type, T_SHORT); // all that's left
843 // bne(CR0, done);
844 extsh(result, result);
845
846 // Nothing to do for T_INT
847 bind(done);
848 }
849
850 // Remove activation.
851 //
852 // Apply stack watermark barrier.
853 // Unlock the receiver if this is a synchronized method.
854 // Unlock any Java monitors from synchronized blocks.
855 // Remove the activation from the stack.
856 //
857 // If there are locked Java monitors
858 // If throw_monitor_exception
859 // throws IllegalMonitorStateException
860 // Else if install_monitor_exception
861 // installs IllegalMonitorStateException
862 // Else
863 // no error processing
864 void InterpreterMacroAssembler::remove_activation(TosState state,
865 bool throw_monitor_exception,
866 bool install_monitor_exception) {
867 BLOCK_COMMENT("remove_activation {");
868
869 asm_assert_mem8_is_zero(in_bytes(JavaThread::preempt_alternate_return_offset()), R16_thread,
870 "remove_activation: should not have alternate return address set");
871
872 unlock_if_synchronized_method(state, throw_monitor_exception, install_monitor_exception);
873
874 // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
875 // that would normally not be safe to use. Such bad returns into unsafe territory of
876 // the stack, will call InterpreterRuntime::at_unwind.
877 Label slow_path, fast_path;
878 Register fp = R22_tmp2;
879 load_fp(fp);
880
881 JFR_ONLY(enter_jfr_critical_section();)
882 safepoint_poll(slow_path, R11_scratch1, true /* at_return */, false /* in_nmethod */);
883 b(fast_path);
884 bind(slow_path);
885 push(state);
886 set_last_Java_frame(R1_SP, noreg);
887 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), R16_thread);
888 reset_last_Java_frame();
889 pop(state);
890 align(32);
891 bind(fast_path);
892
893 // Save result (push state before jvmti call and pop it afterwards) and notify jvmti.
894 notify_method_exit(false, state, NotifyJVMTI, true);
895
896 BLOCK_COMMENT("reserved_stack_check:");
897 if (StackReservedPages > 0) {
898 // Test if reserved zone needs to be enabled.
899 Label no_reserved_zone_enabling;
900
901 // check if already enabled - if so no re-enabling needed
902 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
903 lwz(R0, in_bytes(JavaThread::stack_guard_state_offset()), R16_thread);
904 cmpwi(CR0, R0, StackOverflow::stack_guard_enabled);
905 beq_predict_taken(CR0, no_reserved_zone_enabling);
906
907 // Compare frame pointers. There is no good stack pointer, as with stack
908 // frame compression we can get different SPs when we do calls. A subsequent
909 // call could have a smaller SP, so that this compare succeeds for an
910 // inner call of the method annotated with ReservedStack.
911 ld_ptr(R0, JavaThread::reserved_stack_activation_offset(), R16_thread);
912 cmpld(CR0, fp, R0);
913 blt_predict_taken(CR0, no_reserved_zone_enabling);
914
915 JFR_ONLY(leave_jfr_critical_section();)
916
917 // Enable reserved zone again, throw stack overflow exception.
918 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), R16_thread);
919 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_delayed_StackOverflowError));
920
921 should_not_reach_here();
922
923 bind(no_reserved_zone_enabling);
924 }
925
926 if (state == atos && InlineTypeReturnedAsFields) {
927 Label skip, not_null;
928 cmpdi(CR0, R17_tos, 0);
929 bne(CR0, not_null);
930
931 untested("remove_activation InlineTypeReturnedAsFields null");
932 // Returned value is null, zero all return registers because they may belong to oop fields
933 li(R3_ARG1, 0);
934 li(R4_ARG2, 0);
935 li(R5_ARG3, 0);
936 li(R6_ARG4, 0);
937 li(R7_ARG5, 0);
938 li(R8_ARG6, 0);
939 li(R9_ARG7, 0);
940 li(R10_ARG8, 0);
941 b(skip);
942
943 bind(not_null);
944
945 // Check if we are returning an non-null inline type and load its fields into registers
946 test_oop_is_not_inline_type(R17_tos, skip, /* can_be_null= */ false);
947
948 // Load fields from a buffered value with an inline class specific handler
949 load_klass(R11_scratch1, R17_tos);
950 ld(R11_scratch1, InlineKlass::adr_members_offset(), R11_scratch1);
951 ld(R11_scratch1, InlineKlass::unpack_handler_offset(), R11_scratch1);
952 // Unpack handler can be null if inline type is not scalarizable in returns
953 cmpdi(CR0, R11_scratch1, 0);
954 beq(CR0, skip);
955 mtctr(R11_scratch1);
956 bctrl();
957
958 bind(skip);
959 }
960
961 verify_oop(R17_tos, state);
962
963 remove_top_frame_given_fp(fp, R21_sender_SP, R23_tmp3, /*return_pc*/ R0, R11_scratch1);
964 mtlr(R0);
965 pop_cont_fastpath();
966 JFR_ONLY(leave_jfr_critical_section();)
967
968 BLOCK_COMMENT("} remove_activation");
969 }
970
971 #if INCLUDE_JFR
972 void InterpreterMacroAssembler::enter_jfr_critical_section() {
973 li(R0, 1);
974 stb(R0, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR), R16_thread);
975 }
976
977 void InterpreterMacroAssembler::leave_jfr_critical_section() {
978 li(R0, 0);
979 stb(R0, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR), R16_thread);
980 }
981 #endif // INCLUDE_JFR
982
983 // Lock object
984 //
985 // Registers alive
986 // monitor - Address of the BasicObjectLock to be used for locking,
987 // which must be initialized with the object to lock.
988 // object - Address of the object to be locked.
989 //
990 void InterpreterMacroAssembler::lock_object(Register monitor, Register object) {
991 const Register header = R7_ARG5;
992 const Register tmp = R8_ARG6;
993
994 Label done, slow_case;
995
996 assert_different_registers(header, tmp);
997
998 fast_lock(monitor, object, header, tmp, slow_case);
999 b(done);
1000
1001 bind(slow_case);
1002 call_VM_preemptable(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), monitor);
1003
1004 bind(done);
1005 }
1006
1007 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
1008 //
1009 // Registers alive
1010 // monitor - Address of the BasicObjectLock to be used for locking,
1011 // which must be initialized with the object to lock.
1012 //
1013 // Throw IllegalMonitorException if object is not locked by current thread.
1014 void InterpreterMacroAssembler::unlock_object(Register monitor) {
1015 const Register object = R7_ARG5;
1016 const Register header = R8_ARG6;
1017 const Register current_header = R10_ARG8;
1018
1019 Label free_slot;
1020 Label slow_case;
1021
1022 assert_different_registers(object, header, current_header);
1023
1024 // The object address from the monitor is in object.
1025 ld(object, in_bytes(BasicObjectLock::obj_offset()), monitor);
1026
1027 fast_unlock(object, header, slow_case);
1028
1029 b(free_slot);
1030
1031 bind(slow_case);
1032 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), monitor);
1033
1034 Label done;
1035 b(done); // Monitor register may be overwritten! Runtime has already freed the slot.
1036
1037 // Do monitor->set_obj(nullptr);
1038 align(32, 12);
1039 bind(free_slot);
1040 li(R0, 0);
1041 std(R0, in_bytes(BasicObjectLock::obj_offset()), monitor);
1042 bind(done);
1043 }
1044
1045 // Load compiled (i2c) or interpreter entry when calling from interpreted and
1046 // do the call. Centralized so that all interpreter calls will do the same actions.
1047 // If jvmti single stepping is on for a thread we must not call compiled code.
1048 //
1049 // Input:
1050 // - Rtarget_method: method to call
1051 // - Rret_addr: return address
1052 // - 2 scratch regs
1053 //
1054 void InterpreterMacroAssembler::call_from_interpreter(Register Rtarget_method, Register Rret_addr,
1055 Register Rscratch1, Register Rscratch2) {
1056 assert_different_registers(Rscratch1, Rscratch2, Rtarget_method, Rret_addr);
1057 // Assume we want to go compiled if available.
1058 const Register Rtarget_addr = Rscratch1;
1059 const Register Rinterp_only = Rscratch2;
1060
1061 ld(Rtarget_addr, in_bytes(Method::from_interpreted_offset()), Rtarget_method);
1062
1063 if (JvmtiExport::can_post_interpreter_events()) {
1064 lwz(Rinterp_only, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
1065
1066 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
1067 // compiled code in threads for which the event is enabled. Check here for
1068 // interp_only_mode if these events CAN be enabled.
1069 Label done;
1070 cmpwi(CR0, Rinterp_only, 0);
1071 beq(CR0, done);
1072 ld(Rtarget_addr, in_bytes(Method::interpreter_entry_offset()), Rtarget_method);
1073 align(32, 12);
1074 bind(done);
1075 }
1076
1077 #ifdef ASSERT
1078 {
1079 Label Lok;
1080 cmpdi(CR0, Rtarget_addr, 0);
1081 bne(CR0, Lok);
1082 stop("null entry point");
1083 bind(Lok);
1084 }
1085 #endif // ASSERT
1086
1087 mr(R21_sender_SP, R1_SP);
1088
1089 // Calc a precise SP for the call. The SP value we calculated in
1090 // generate_fixed_frame() is based on the max_stack() value, so we would waste stack space
1091 // if esp is not max. Also, the i2c adapter extends the stack space without restoring
1092 // our pre-calced value, so repeating calls via i2c would result in stack overflow.
1093 // Since esp already points to an empty slot, we just have to sub 1 additional slot
1094 // to meet the abi scratch requirements.
1095 // The max_stack pointer will get restored by means of the GR_Lmax_stack local in
1096 // the return entry of the interpreter.
1097 addi(Rscratch2, R15_esp, Interpreter::stackElementSize - frame::top_ijava_frame_abi_size);
1098 clrrdi(Rscratch2, Rscratch2, exact_log2(frame::alignment_in_bytes)); // round towards smaller address
1099 resize_frame_absolute(Rscratch2, Rscratch2, R0);
1100
1101 mr_if_needed(R19_method, Rtarget_method);
1102 mtctr(Rtarget_addr);
1103 mtlr(Rret_addr);
1104
1105 save_interpreter_state(Rscratch2);
1106 #ifdef ASSERT
1107 ld(Rscratch1, _ijava_state_neg(top_frame_sp), Rscratch2); // Rscratch2 contains fp
1108 sldi(Rscratch1, Rscratch1, Interpreter::logStackElementSize);
1109 add(Rscratch1, Rscratch1, Rscratch2); // Rscratch2 contains fp
1110 // Compare sender_sp with the derelativized top_frame_sp
1111 cmpd(CR0, R21_sender_SP, Rscratch1);
1112 asm_assert_eq("top_frame_sp incorrect");
1113 #endif
1114
1115 bctr();
1116 }
1117
1118 // Set the method data pointer for the current bcp.
1119 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1120 assert(ProfileInterpreter, "must be profiling interpreter");
1121 Label get_continue;
1122 ld(R28_mdx, in_bytes(Method::method_data_offset()), R19_method);
1123 test_method_data_pointer(get_continue);
1124 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), R19_method, R14_bcp);
1125
1126 addi(R28_mdx, R28_mdx, in_bytes(MethodData::data_offset()));
1127 add(R28_mdx, R28_mdx, R3_RET);
1128 bind(get_continue);
1129 }
1130
1131 // Test ImethodDataPtr. If it is null, continue at the specified label.
1132 void InterpreterMacroAssembler::test_method_data_pointer(Label& zero_continue) {
1133 assert(ProfileInterpreter, "must be profiling interpreter");
1134 cmpdi(CR0, R28_mdx, 0);
1135 beq(CR0, zero_continue);
1136 }
1137
1138 void InterpreterMacroAssembler::verify_method_data_pointer() {
1139 assert(ProfileInterpreter, "must be profiling interpreter");
1140 #ifdef ASSERT
1141 Label verify_continue;
1142 test_method_data_pointer(verify_continue);
1143
1144 // If the mdp is valid, it will point to a DataLayout header which is
1145 // consistent with the bcp. The converse is highly probable also.
1146 lhz(R11_scratch1, in_bytes(DataLayout::bci_offset()), R28_mdx);
1147 ld(R12_scratch2, in_bytes(Method::const_offset()), R19_method);
1148 addi(R11_scratch1, R11_scratch1, in_bytes(ConstMethod::codes_offset()));
1149 add(R11_scratch1, R11_scratch1, R12_scratch2);
1150 cmpd(CR0, R11_scratch1, R14_bcp);
1151 beq(CR0, verify_continue);
1152
1153 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), R19_method, R14_bcp, R28_mdx);
1154
1155 bind(verify_continue);
1156 #endif
1157 }
1158
1159 // Store a value at some constant offset from the method data pointer.
1160 void InterpreterMacroAssembler::set_mdp_data_at(int constant, Register value) {
1161 assert(ProfileInterpreter, "must be profiling interpreter");
1162
1163 std(value, constant, R28_mdx);
1164 }
1165
1166 // Increment the value at some constant offset from the method data pointer.
1167 void InterpreterMacroAssembler::increment_mdp_data_at(int constant,
1168 Register counter_addr,
1169 Register Rbumped_count,
1170 bool decrement) {
1171 // Locate the counter at a fixed offset from the mdp:
1172 addi(counter_addr, R28_mdx, constant);
1173 increment_mdp_data_at(counter_addr, Rbumped_count, decrement);
1174 }
1175
1176 // Increment the value at some non-fixed (reg + constant) offset from
1177 // the method data pointer.
1178 void InterpreterMacroAssembler::increment_mdp_data_at(Register reg,
1179 int constant,
1180 Register scratch,
1181 Register Rbumped_count,
1182 bool decrement) {
1183 // Add the constant to reg to get the offset.
1184 add(scratch, R28_mdx, reg);
1185 // Then calculate the counter address.
1186 addi(scratch, scratch, constant);
1187 increment_mdp_data_at(scratch, Rbumped_count, decrement);
1188 }
1189
1190 void InterpreterMacroAssembler::increment_mdp_data_at(Register counter_addr,
1191 Register Rbumped_count,
1192 bool decrement) {
1193 assert(ProfileInterpreter, "must be profiling interpreter");
1194
1195 // Load the counter.
1196 ld(Rbumped_count, 0, counter_addr);
1197
1198 if (decrement) {
1199 // Decrement the register. Set condition codes.
1200 addi(Rbumped_count, Rbumped_count, - DataLayout::counter_increment);
1201 // Store the decremented counter, if it is still negative.
1202 std(Rbumped_count, 0, counter_addr);
1203 // Note: add/sub overflow check are not ported, since 64 bit
1204 // calculation should never overflow.
1205 } else {
1206 // Increment the register. Set carry flag.
1207 addi(Rbumped_count, Rbumped_count, DataLayout::counter_increment);
1208 // Store the incremented counter.
1209 std(Rbumped_count, 0, counter_addr);
1210 }
1211 }
1212
1213 // Set a flag value at the current method data pointer position.
1214 void InterpreterMacroAssembler::set_mdp_flag_at(int flag_constant,
1215 Register scratch) {
1216 assert(ProfileInterpreter, "must be profiling interpreter");
1217 // Load the data header.
1218 lbz(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx);
1219 // Set the flag.
1220 ori(scratch, scratch, flag_constant);
1221 // Store the modified header.
1222 stb(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx);
1223 }
1224
1225 // Test the location at some offset from the method data pointer.
1226 // If it is not equal to value, branch to the not_equal_continue Label.
1227 void InterpreterMacroAssembler::test_mdp_data_at(int offset,
1228 Register value,
1229 Label& not_equal_continue,
1230 Register test_out) {
1231 assert(ProfileInterpreter, "must be profiling interpreter");
1232
1233 ld(test_out, offset, R28_mdx);
1234 cmpd(CR0, value, test_out);
1235 bne(CR0, not_equal_continue);
1236 }
1237
1238 // Update the method data pointer by the displacement located at some fixed
1239 // offset from the method data pointer.
1240 void InterpreterMacroAssembler::update_mdp_by_offset(int offset_of_disp,
1241 Register scratch) {
1242 assert(ProfileInterpreter, "must be profiling interpreter");
1243
1244 ld(scratch, offset_of_disp, R28_mdx);
1245 add(R28_mdx, scratch, R28_mdx);
1246 }
1247
1248 // Update the method data pointer by the displacement located at the
1249 // offset (reg + offset_of_disp).
1250 void InterpreterMacroAssembler::update_mdp_by_offset(Register reg,
1251 int offset_of_disp,
1252 Register scratch) {
1253 assert(ProfileInterpreter, "must be profiling interpreter");
1254
1255 add(scratch, reg, R28_mdx);
1256 ld(scratch, offset_of_disp, scratch);
1257 add(R28_mdx, scratch, R28_mdx);
1258 }
1259
1260 // Update the method data pointer by a simple constant displacement.
1261 void InterpreterMacroAssembler::update_mdp_by_constant(int constant) {
1262 assert(ProfileInterpreter, "must be profiling interpreter");
1263 addi(R28_mdx, R28_mdx, constant);
1264 }
1265
1266 // Update the method data pointer for a _ret bytecode whose target
1267 // was not among our cached targets.
1268 void InterpreterMacroAssembler::update_mdp_for_ret(TosState state,
1269 Register return_bci) {
1270 assert(ProfileInterpreter, "must be profiling interpreter");
1271
1272 push(state);
1273 assert(return_bci->is_nonvolatile(), "need to protect return_bci");
1274 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
1275 pop(state);
1276 }
1277
1278 // Increments the backedge counter.
1279 // Returns backedge counter + invocation counter in Rdst.
1280 void InterpreterMacroAssembler::increment_backedge_counter(const Register Rcounters, const Register Rdst,
1281 const Register Rtmp1, Register Rscratch) {
1282 assert(UseCompiler, "incrementing must be useful");
1283 assert_different_registers(Rdst, Rtmp1);
1284 const Register invocation_counter = Rtmp1;
1285 const Register counter = Rdst;
1286 // TODO: PPC port: assert(4 == InvocationCounter::sz_counter(), "unexpected field size.");
1287
1288 // Load backedge counter.
1289 lwz(counter, in_bytes(MethodCounters::backedge_counter_offset()) +
1290 in_bytes(InvocationCounter::counter_offset()), Rcounters);
1291 // Load invocation counter.
1292 lwz(invocation_counter, in_bytes(MethodCounters::invocation_counter_offset()) +
1293 in_bytes(InvocationCounter::counter_offset()), Rcounters);
1294
1295 // Add the delta to the backedge counter.
1296 addi(counter, counter, InvocationCounter::count_increment);
1297
1298 // Mask the invocation counter.
1299 andi(invocation_counter, invocation_counter, InvocationCounter::count_mask_value);
1300
1301 // Store new counter value.
1302 stw(counter, in_bytes(MethodCounters::backedge_counter_offset()) +
1303 in_bytes(InvocationCounter::counter_offset()), Rcounters);
1304 // Return invocation counter + backedge counter.
1305 add(counter, counter, invocation_counter);
1306 }
1307
1308 // Count a taken branch in the bytecodes.
1309 void InterpreterMacroAssembler::profile_taken_branch(Register scratch, Register bumped_count) {
1310 if (ProfileInterpreter) {
1311 Label profile_continue;
1312
1313 // If no method data exists, go to profile_continue.
1314 test_method_data_pointer(profile_continue);
1315
1316 // We are taking a branch. Increment the taken count.
1317 increment_mdp_data_at(in_bytes(JumpData::taken_offset()), scratch, bumped_count);
1318
1319 // The method data pointer needs to be updated to reflect the new target.
1320 update_mdp_by_offset(in_bytes(JumpData::displacement_offset()), scratch);
1321 bind (profile_continue);
1322 }
1323 }
1324
1325 // Count a not-taken branch in the bytecodes.
1326 void InterpreterMacroAssembler::profile_not_taken_branch(Register scratch1, Register scratch2, bool acmp) {
1327 if (ProfileInterpreter) {
1328 Label profile_continue;
1329
1330 // If no method data exists, go to profile_continue.
1331 test_method_data_pointer(profile_continue);
1332
1333 // We are taking a branch. Increment the not taken count.
1334 increment_mdp_data_at(in_bytes(BranchData::not_taken_offset()), scratch1, scratch2);
1335
1336 // The method data pointer needs to be updated to correspond to the
1337 // next bytecode.
1338 update_mdp_by_constant(acmp ? in_bytes(ACmpData::acmp_data_size()) : in_bytes(BranchData::branch_data_size()));
1339 bind (profile_continue);
1340 }
1341 }
1342
1343 // Count a non-virtual call in the bytecodes.
1344 void InterpreterMacroAssembler::profile_call(Register scratch1, Register scratch2) {
1345 if (ProfileInterpreter) {
1346 Label profile_continue;
1347
1348 // If no method data exists, go to profile_continue.
1349 test_method_data_pointer(profile_continue);
1350
1351 // We are making a call. Increment the count.
1352 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2);
1353
1354 // The method data pointer needs to be updated to reflect the new target.
1355 update_mdp_by_constant(in_bytes(CounterData::counter_data_size()));
1356 bind (profile_continue);
1357 }
1358 }
1359
1360 // Count a final call in the bytecodes.
1361 void InterpreterMacroAssembler::profile_final_call(Register scratch1, Register scratch2) {
1362 if (ProfileInterpreter) {
1363 Label profile_continue;
1364
1365 // If no method data exists, go to profile_continue.
1366 test_method_data_pointer(profile_continue);
1367
1368 // We are making a call. Increment the count.
1369 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2);
1370
1371 // The method data pointer needs to be updated to reflect the new target.
1372 update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
1373 bind (profile_continue);
1374 }
1375 }
1376
1377 // Count a virtual call in the bytecodes.
1378 void InterpreterMacroAssembler::profile_virtual_call(Register Rreceiver,
1379 Register Rscratch1,
1380 Register Rscratch2) {
1381 if (!ProfileInterpreter) { return; }
1382 Label profile_continue;
1383
1384 // If no method data exists, go to profile_continue.
1385 test_method_data_pointer(profile_continue);
1386
1387 // Record the receiver type.
1388 profile_receiver_type(Rreceiver, R28_mdx, 0, Rscratch1, Rscratch2);
1389
1390 // The method data pointer needs to be updated to reflect the new target.
1391 update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
1392 bind (profile_continue);
1393 }
1394
1395 void InterpreterMacroAssembler::profile_typecheck(Register Rklass, Register Rscratch1, Register Rscratch2) {
1396 if (ProfileInterpreter) {
1397 Label profile_continue;
1398
1399 // If no method data exists, go to profile_continue.
1400 test_method_data_pointer(profile_continue);
1401
1402 int mdp_delta = in_bytes(BitData::bit_data_size());
1403 if (TypeProfileCasts) {
1404 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1405
1406 // Record the object type.
1407 profile_receiver_type(Rklass, R28_mdx, 0, Rscratch1, Rscratch2);
1408 }
1409
1410 // The method data pointer needs to be updated.
1411 update_mdp_by_constant(mdp_delta);
1412
1413 bind (profile_continue);
1414 }
1415 }
1416
1417 // Count a ret in the bytecodes.
1418 void InterpreterMacroAssembler::profile_ret(TosState state, Register return_bci,
1419 Register scratch1, Register scratch2) {
1420 if (ProfileInterpreter) {
1421 Label profile_continue;
1422 uint row;
1423
1424 // If no method data exists, go to profile_continue.
1425 test_method_data_pointer(profile_continue);
1426
1427 // Update the total ret count.
1428 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2 );
1429
1430 for (row = 0; row < RetData::row_limit(); row++) {
1431 Label next_test;
1432
1433 // See if return_bci is equal to bci[n]:
1434 test_mdp_data_at(in_bytes(RetData::bci_offset(row)), return_bci, next_test, scratch1);
1435
1436 // return_bci is equal to bci[n]. Increment the count.
1437 increment_mdp_data_at(in_bytes(RetData::bci_count_offset(row)), scratch1, scratch2);
1438
1439 // The method data pointer needs to be updated to reflect the new target.
1440 update_mdp_by_offset(in_bytes(RetData::bci_displacement_offset(row)), scratch1);
1441 b(profile_continue);
1442 bind(next_test);
1443 }
1444
1445 update_mdp_for_ret(state, return_bci);
1446
1447 bind (profile_continue);
1448 }
1449 }
1450
1451 // Count the default case of a switch construct.
1452 void InterpreterMacroAssembler::profile_switch_default(Register scratch1, Register scratch2) {
1453 if (ProfileInterpreter) {
1454 Label profile_continue;
1455
1456 // If no method data exists, go to profile_continue.
1457 test_method_data_pointer(profile_continue);
1458
1459 // Update the default case count
1460 increment_mdp_data_at(in_bytes(MultiBranchData::default_count_offset()),
1461 scratch1, scratch2);
1462
1463 // The method data pointer needs to be updated.
1464 update_mdp_by_offset(in_bytes(MultiBranchData::default_displacement_offset()),
1465 scratch1);
1466
1467 bind (profile_continue);
1468 }
1469 }
1470
1471 // Count the index'th case of a switch construct.
1472 void InterpreterMacroAssembler::profile_switch_case(Register index,
1473 Register scratch1,
1474 Register scratch2,
1475 Register scratch3) {
1476 if (ProfileInterpreter) {
1477 assert_different_registers(index, scratch1, scratch2, scratch3);
1478 Label profile_continue;
1479
1480 // If no method data exists, go to profile_continue.
1481 test_method_data_pointer(profile_continue);
1482
1483 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes().
1484 li(scratch3, in_bytes(MultiBranchData::case_array_offset()));
1485
1486 assert (in_bytes(MultiBranchData::per_case_size()) == 16, "so that shladd works");
1487 sldi(scratch1, index, exact_log2(in_bytes(MultiBranchData::per_case_size())));
1488 add(scratch1, scratch1, scratch3);
1489
1490 // Update the case count.
1491 increment_mdp_data_at(scratch1, in_bytes(MultiBranchData::relative_count_offset()), scratch2, scratch3);
1492
1493 // The method data pointer needs to be updated.
1494 update_mdp_by_offset(scratch1, in_bytes(MultiBranchData::relative_displacement_offset()), scratch2);
1495
1496 bind (profile_continue);
1497 }
1498 }
1499
1500 template <class ArrayData> void InterpreterMacroAssembler::profile_array_type(Register array,
1501 Register tmp1,
1502 Register tmp2) {
1503 if (ProfileInterpreter) {
1504 Label profile_continue;
1505 assert_different_registers(array, tmp1, tmp2);
1506
1507 // If no method data exists, go to profile_continue.
1508 test_method_data_pointer(profile_continue);
1509
1510 profile_obj_type(array, R28_mdx, in_bytes(ArrayData::array_offset()), tmp1, tmp2);
1511
1512 Label not_flat;
1513 test_non_flat_array_oop(array, tmp1, not_flat);
1514 set_mdp_flag_at(ArrayData::flat_array_byte_constant(), tmp1);
1515 bind(not_flat);
1516
1517 Label not_null_free;
1518 test_non_null_free_array_oop(array, tmp1, not_null_free);
1519 set_mdp_flag_at(ArrayData::null_free_array_byte_constant(), tmp1);
1520 bind(not_null_free);
1521
1522 bind(profile_continue);
1523 }
1524 }
1525
1526 template void InterpreterMacroAssembler::profile_array_type<ArrayLoadData>(Register array,
1527 Register tmp1,
1528 Register tmp2);
1529 template void InterpreterMacroAssembler::profile_array_type<ArrayStoreData>(Register array,
1530 Register tmp1,
1531 Register tmp2);
1532
1533 void InterpreterMacroAssembler::profile_multiple_element_types(Register element, Register tmp1, Register tmp2, Register tmp3) {
1534 if (ProfileInterpreter) {
1535 Label profile_continue;
1536
1537 // If no method data exists, go to profile_continue.
1538 test_method_data_pointer(profile_continue);
1539
1540 Label done, update;
1541 cmpdi(CR0, element, 0);
1542 bne(CR0, update);
1543 set_mdp_flag_at(BitData::null_seen_byte_constant(), tmp1);
1544 b(done);
1545
1546 bind(update);
1547 load_klass(tmp1, element);
1548
1549 // Record the object type.
1550 profile_receiver_type(tmp1, R28_mdx, 0, tmp2, tmp3);
1551
1552 bind(done);
1553
1554 // The method data pointer needs to be updated.
1555 update_mdp_by_constant(in_bytes(ArrayStoreData::array_store_data_size()));
1556
1557 bind(profile_continue);
1558 }
1559 }
1560
1561
1562 void InterpreterMacroAssembler::profile_element_type(Register element, Register tmp1, Register tmp2) {
1563 if (ProfileInterpreter) {
1564 Label profile_continue;
1565
1566 // If no method data exists, go to profile_continue.
1567 test_method_data_pointer(profile_continue);
1568
1569 profile_obj_type(element, R28_mdx, in_bytes(ArrayLoadData::element_offset()), tmp1, tmp2);
1570
1571 // The method data pointer needs to be updated.
1572 update_mdp_by_constant(in_bytes(ArrayLoadData::array_load_data_size()));
1573
1574 bind(profile_continue);
1575 }
1576 }
1577
1578 void InterpreterMacroAssembler::profile_acmp(Register left,
1579 Register right,
1580 Register tmp1,
1581 Register tmp2) {
1582 if (ProfileInterpreter) {
1583 Label profile_continue;
1584 assert_different_registers(left, right, tmp1, tmp2);
1585
1586 // If no method data exists, go to profile_continue.
1587 test_method_data_pointer(profile_continue);
1588
1589 profile_obj_type(left, R28_mdx, in_bytes(ACmpData::left_offset()), tmp1, tmp2);
1590
1591 Label left_not_inline_type;
1592 test_oop_is_not_inline_type(left, left_not_inline_type);
1593 set_mdp_flag_at(ACmpData::left_inline_type_byte_constant(), tmp1);
1594 bind(left_not_inline_type);
1595
1596 profile_obj_type(right, R28_mdx, in_bytes(ACmpData::right_offset()), tmp1, tmp2);
1597
1598 test_oop_is_not_inline_type(right, profile_continue);
1599 set_mdp_flag_at(ACmpData::right_inline_type_byte_constant(), tmp1);
1600
1601 bind(profile_continue);
1602 }
1603 }
1604
1605 void InterpreterMacroAssembler::profile_null_seen(Register Rscratch1, Register Rscratch2) {
1606 if (ProfileInterpreter) {
1607 assert_different_registers(Rscratch1, Rscratch2);
1608 Label profile_continue;
1609
1610 // If no method data exists, go to profile_continue.
1611 test_method_data_pointer(profile_continue);
1612
1613 set_mdp_flag_at(BitData::null_seen_byte_constant(), Rscratch1);
1614
1615 // The method data pointer needs to be updated.
1616 int mdp_delta = in_bytes(BitData::bit_data_size());
1617 if (TypeProfileCasts) {
1618 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1619 }
1620 update_mdp_by_constant(mdp_delta);
1621
1622 bind (profile_continue);
1623 }
1624 }
1625
1626
1627 // Argument and return type profilig.
1628 // kills: tmp, tmp2, R0, CR0, CR1
1629 void InterpreterMacroAssembler::profile_obj_type(Register obj, Register mdo_addr_base,
1630 RegisterOrConstant mdo_addr_offs,
1631 Register tmp, Register tmp2) {
1632 Label do_nothing, do_update;
1633
1634 // tmp2 = obj is allowed
1635 assert_different_registers(obj, mdo_addr_base, tmp, R0);
1636 assert_different_registers(tmp2, mdo_addr_base, tmp, R0);
1637 const Register klass = tmp2;
1638
1639 verify_oop(obj);
1640
1641 ld(tmp, mdo_addr_offs, mdo_addr_base);
1642
1643 // Set null_seen if obj is 0.
1644 cmpdi(CR0, obj, 0);
1645 ori(R0, tmp, TypeEntries::null_seen);
1646 beq(CR0, do_update);
1647
1648 load_klass(klass, obj);
1649
1650 clrrdi(R0, tmp, exact_log2(-TypeEntries::type_klass_mask));
1651 // Basically same as andi(R0, tmp, TypeEntries::type_klass_mask);
1652 cmpd(CR1, R0, klass);
1653 // Klass seen before, nothing to do (regardless of unknown bit).
1654 //beq(CR1, do_nothing);
1655
1656 andi_(R0, tmp, TypeEntries::type_unknown);
1657 // Already unknown. Nothing to do anymore.
1658 //bne(CR0, do_nothing);
1659 crorc(CR0, Assembler::equal, CR1, Assembler::equal); // cr0 eq = cr1 eq or cr0 ne
1660 beq(CR0, do_nothing);
1661
1662 clrrdi_(R0, tmp, exact_log2(-TypeEntries::type_mask));
1663 orr(R0, klass, tmp); // Combine klass and null_seen bit (only used if (tmp & type_mask)==0).
1664 beq(CR0, do_update); // First time here. Set profile type.
1665
1666 // Different than before. Cannot keep accurate profile.
1667 ori(R0, tmp, TypeEntries::type_unknown);
1668
1669 bind(do_update);
1670 // update profile
1671 std(R0, mdo_addr_offs, mdo_addr_base);
1672
1673 align(32, 12);
1674 bind(do_nothing);
1675 }
1676
1677 void InterpreterMacroAssembler::profile_arguments_type(Register callee,
1678 Register tmp1, Register tmp2,
1679 bool is_virtual) {
1680 if (!ProfileInterpreter) {
1681 return;
1682 }
1683
1684 assert_different_registers(callee, tmp1, tmp2, R28_mdx);
1685
1686 if (MethodData::profile_arguments() || MethodData::profile_return()) {
1687 Label profile_continue;
1688
1689 test_method_data_pointer(profile_continue);
1690
1691 int off_to_start = is_virtual ?
1692 in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
1693
1694 lbz(tmp1, in_bytes(DataLayout::tag_offset()) - off_to_start, R28_mdx);
1695 cmpwi(CR0, tmp1, is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
1696 bne(CR0, profile_continue);
1697
1698 if (MethodData::profile_arguments()) {
1699 Label done;
1700 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
1701 addi(R28_mdx, R28_mdx, off_to_args);
1702
1703 for (int i = 0; i < TypeProfileArgsLimit; i++) {
1704 if (i > 0 || MethodData::profile_return()) {
1705 // If return value type is profiled we may have no argument to profile.
1706 ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx);
1707 cmpdi(CR0, tmp1, (i+1)*TypeStackSlotEntries::per_arg_count());
1708 addi(tmp1, tmp1, -i*TypeStackSlotEntries::per_arg_count());
1709 blt(CR0, done);
1710 }
1711 ld(tmp1, in_bytes(Method::const_offset()), callee);
1712 lhz(tmp1, in_bytes(ConstMethod::size_of_parameters_offset()), tmp1);
1713 // Stack offset o (zero based) from the start of the argument
1714 // list, for n arguments translates into offset n - o - 1 from
1715 // the end of the argument list. But there's an extra slot at
1716 // the top of the stack. So the offset is n - o from Lesp.
1717 ld(tmp2, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args, R28_mdx);
1718 subf(tmp1, tmp2, tmp1);
1719
1720 sldi(tmp1, tmp1, Interpreter::logStackElementSize);
1721 ldx(tmp1, tmp1, R15_esp);
1722
1723 profile_obj_type(tmp1, R28_mdx, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args, tmp2, tmp1);
1724
1725 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
1726 addi(R28_mdx, R28_mdx, to_add);
1727 off_to_args += to_add;
1728 }
1729
1730 if (MethodData::profile_return()) {
1731 ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx);
1732 addi(tmp1, tmp1, -TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
1733 }
1734
1735 bind(done);
1736
1737 if (MethodData::profile_return()) {
1738 // We're right after the type profile for the last
1739 // argument. tmp1 is the number of cells left in the
1740 // CallTypeData/VirtualCallTypeData to reach its end. Non null
1741 // if there's a return to profile.
1742 assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(),
1743 "can't move past ret type");
1744 sldi(tmp1, tmp1, exact_log2(DataLayout::cell_size));
1745 add(R28_mdx, tmp1, R28_mdx);
1746 }
1747 } else {
1748 assert(MethodData::profile_return(), "either profile call args or call ret");
1749 update_mdp_by_constant(in_bytes(TypeEntriesAtCall::return_only_size()));
1750 }
1751
1752 // Mdp points right after the end of the
1753 // CallTypeData/VirtualCallTypeData, right after the cells for the
1754 // return value type if there's one.
1755 align(32, 12);
1756 bind(profile_continue);
1757 }
1758 }
1759
1760 void InterpreterMacroAssembler::profile_return_type(Register ret, Register tmp1, Register tmp2) {
1761 assert_different_registers(ret, tmp1, tmp2);
1762 if (ProfileInterpreter && MethodData::profile_return()) {
1763 Label profile_continue;
1764
1765 test_method_data_pointer(profile_continue);
1766
1767 if (MethodData::profile_return_jsr292_only()) {
1768 // If we don't profile all invoke bytecodes we must make sure
1769 // it's a bytecode we indeed profile. We can't go back to the
1770 // beginning of the ProfileData we intend to update to check its
1771 // type because we're right after it and we don't known its
1772 // length.
1773 lbz(tmp1, 0, R14_bcp);
1774 lbz(tmp2, in_bytes(Method::intrinsic_id_offset()), R19_method);
1775 cmpwi(CR0, tmp1, Bytecodes::_invokedynamic);
1776 cmpwi(CR1, tmp1, Bytecodes::_invokehandle);
1777 cror(CR0, Assembler::equal, CR1, Assembler::equal);
1778 cmpwi(CR1, tmp2, static_cast<int>(vmIntrinsics::_compiledLambdaForm));
1779 cror(CR0, Assembler::equal, CR1, Assembler::equal);
1780 bne(CR0, profile_continue);
1781 }
1782
1783 profile_obj_type(ret, R28_mdx, -in_bytes(SingleTypeEntry::size()), tmp1, tmp2);
1784
1785 align(32, 12);
1786 bind(profile_continue);
1787 }
1788 }
1789
1790 void InterpreterMacroAssembler::profile_parameters_type(Register tmp1, Register tmp2,
1791 Register tmp3, Register tmp4) {
1792 if (ProfileInterpreter && MethodData::profile_parameters()) {
1793 Label profile_continue, done;
1794
1795 test_method_data_pointer(profile_continue);
1796
1797 // Load the offset of the area within the MDO used for
1798 // parameters. If it's negative we're not profiling any parameters.
1799 lwz(tmp1, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()), R28_mdx);
1800 cmpwi(CR0, tmp1, 0);
1801 blt(CR0, profile_continue);
1802
1803 // Compute a pointer to the area for parameters from the offset
1804 // and move the pointer to the slot for the last
1805 // parameters. Collect profiling from last parameter down.
1806 // mdo start + parameters offset + array length - 1
1807
1808 // Pointer to the parameter area in the MDO.
1809 const Register mdp = tmp1;
1810 add(mdp, tmp1, R28_mdx);
1811
1812 // Offset of the current profile entry to update.
1813 const Register entry_offset = tmp2;
1814 // entry_offset = array len in number of cells
1815 ld(entry_offset, in_bytes(ArrayData::array_len_offset()), mdp);
1816
1817 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
1818 assert(off_base % DataLayout::cell_size == 0, "should be a number of cells");
1819
1820 // entry_offset (number of cells) = array len - size of 1 entry + offset of the stack slot field
1821 addi(entry_offset, entry_offset, -TypeStackSlotEntries::per_arg_count() + (off_base / DataLayout::cell_size));
1822 // entry_offset in bytes
1823 sldi(entry_offset, entry_offset, exact_log2(DataLayout::cell_size));
1824
1825 Label loop;
1826 align(32, 12);
1827 bind(loop);
1828
1829 // Load offset on the stack from the slot for this parameter.
1830 ld(tmp3, entry_offset, mdp);
1831 sldi(tmp3, tmp3, Interpreter::logStackElementSize);
1832 neg(tmp3, tmp3);
1833 // Read the parameter from the local area.
1834 ldx(tmp3, tmp3, R18_locals);
1835
1836 // Make entry_offset now point to the type field for this parameter.
1837 int type_base = in_bytes(ParametersTypeData::type_offset(0));
1838 assert(type_base > off_base, "unexpected");
1839 addi(entry_offset, entry_offset, type_base - off_base);
1840
1841 // Profile the parameter.
1842 profile_obj_type(tmp3, mdp, entry_offset, tmp4, tmp3);
1843
1844 // Go to next parameter.
1845 int delta = TypeStackSlotEntries::per_arg_count() * DataLayout::cell_size + (type_base - off_base);
1846 cmpdi(CR0, entry_offset, off_base + delta);
1847 addi(entry_offset, entry_offset, -delta);
1848 bge(CR0, loop);
1849
1850 align(32, 12);
1851 bind(profile_continue);
1852 }
1853 }
1854
1855 // Add a monitor (see frame_ppc.hpp).
1856 void InterpreterMacroAssembler::add_monitor_to_stack(bool stack_is_empty, Register Rtemp1, Register Rtemp2) {
1857
1858 // Very-local scratch registers.
1859 const Register esp = Rtemp1;
1860 const Register slot = Rtemp2;
1861
1862 // Extracted monitor_size.
1863 int monitor_size = frame::interpreter_frame_monitor_size_in_bytes();
1864 assert(Assembler::is_aligned((unsigned int)monitor_size,
1865 (unsigned int)frame::alignment_in_bytes),
1866 "size of a monitor must respect alignment of SP");
1867
1868 resize_frame(-monitor_size, /*temp*/esp); // Allocate space for new monitor
1869 subf(Rtemp2, esp, R1_SP); // esp contains fp
1870 sradi(Rtemp2, Rtemp2, Interpreter::logStackElementSize);
1871 // Store relativized top_frame_sp
1872 std(Rtemp2, _ijava_state_neg(top_frame_sp), esp); // esp contains fp
1873
1874 // Shuffle expression stack down. Recall that stack_base points
1875 // just above the new expression stack bottom. Old_tos and new_tos
1876 // are used to scan thru the old and new expression stacks.
1877 if (!stack_is_empty) {
1878 Label copy_slot, copy_slot_finished;
1879 const Register n_slots = slot;
1880
1881 addi(esp, R15_esp, Interpreter::stackElementSize); // Point to first element (pre-pushed stack).
1882 subf(n_slots, esp, R26_monitor);
1883 srdi_(n_slots, n_slots, LogBytesPerWord); // Compute number of slots to copy.
1884 assert(LogBytesPerWord == 3, "conflicts assembler instructions");
1885 beq(CR0, copy_slot_finished); // Nothing to copy.
1886
1887 mtctr(n_slots);
1888
1889 // loop
1890 bind(copy_slot);
1891 ld(slot, 0, esp); // Move expression stack down.
1892 std(slot, -monitor_size, esp); // distance = monitor_size
1893 addi(esp, esp, BytesPerWord);
1894 bdnz(copy_slot);
1895
1896 bind(copy_slot_finished);
1897 }
1898
1899 addi(R15_esp, R15_esp, -monitor_size);
1900 addi(R26_monitor, R26_monitor, -monitor_size);
1901
1902 // Restart interpreter
1903 }
1904
1905 // ============================================================================
1906 // Java locals access
1907
1908 // Load a local variable at index in Rindex into register Rdst_value.
1909 // Also puts address of local into Rdst_address as a service.
1910 // Kills:
1911 // - Rdst_value
1912 // - Rdst_address
1913 void InterpreterMacroAssembler::load_local_int(Register Rdst_value, Register Rdst_address, Register Rindex) {
1914 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
1915 subf(Rdst_address, Rdst_address, R18_locals);
1916 lwz(Rdst_value, 0, Rdst_address);
1917 }
1918
1919 // Load a local variable at index in Rindex into register Rdst_value.
1920 // Also puts address of local into Rdst_address as a service.
1921 // Kills:
1922 // - Rdst_value
1923 // - Rdst_address
1924 void InterpreterMacroAssembler::load_local_long(Register Rdst_value, Register Rdst_address, Register Rindex) {
1925 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
1926 subf(Rdst_address, Rdst_address, R18_locals);
1927 ld(Rdst_value, -8, Rdst_address);
1928 }
1929
1930 // Load a local variable at index in Rindex into register Rdst_value.
1931 // Also puts address of local into Rdst_address as a service.
1932 // Input:
1933 // - Rindex: slot nr of local variable
1934 // Kills:
1935 // - Rdst_value
1936 // - Rdst_address
1937 void InterpreterMacroAssembler::load_local_ptr(Register Rdst_value,
1938 Register Rdst_address,
1939 Register Rindex) {
1940 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
1941 subf(Rdst_address, Rdst_address, R18_locals);
1942 ld(Rdst_value, 0, Rdst_address);
1943 }
1944
1945 // Load a local variable at index in Rindex into register Rdst_value.
1946 // Also puts address of local into Rdst_address as a service.
1947 // Kills:
1948 // - Rdst_value
1949 // - Rdst_address
1950 void InterpreterMacroAssembler::load_local_float(FloatRegister Rdst_value,
1951 Register Rdst_address,
1952 Register Rindex) {
1953 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
1954 subf(Rdst_address, Rdst_address, R18_locals);
1955 lfs(Rdst_value, 0, Rdst_address);
1956 }
1957
1958 // Load a local variable at index in Rindex into register Rdst_value.
1959 // Also puts address of local into Rdst_address as a service.
1960 // Kills:
1961 // - Rdst_value
1962 // - Rdst_address
1963 void InterpreterMacroAssembler::load_local_double(FloatRegister Rdst_value,
1964 Register Rdst_address,
1965 Register Rindex) {
1966 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize);
1967 subf(Rdst_address, Rdst_address, R18_locals);
1968 lfd(Rdst_value, -8, Rdst_address);
1969 }
1970
1971 // Store an int value at local variable slot Rindex.
1972 // Kills:
1973 // - Rindex
1974 void InterpreterMacroAssembler::store_local_int(Register Rvalue, Register Rindex) {
1975 sldi(Rindex, Rindex, Interpreter::logStackElementSize);
1976 subf(Rindex, Rindex, R18_locals);
1977 stw(Rvalue, 0, Rindex);
1978 }
1979
1980 // Store a long value at local variable slot Rindex.
1981 // Kills:
1982 // - Rindex
1983 void InterpreterMacroAssembler::store_local_long(Register Rvalue, Register Rindex) {
1984 sldi(Rindex, Rindex, Interpreter::logStackElementSize);
1985 subf(Rindex, Rindex, R18_locals);
1986 std(Rvalue, -8, Rindex);
1987 }
1988
1989 // Store an oop value at local variable slot Rindex.
1990 // Kills:
1991 // - Rindex
1992 void InterpreterMacroAssembler::store_local_ptr(Register Rvalue, Register Rindex) {
1993 sldi(Rindex, Rindex, Interpreter::logStackElementSize);
1994 subf(Rindex, Rindex, R18_locals);
1995 std(Rvalue, 0, Rindex);
1996 }
1997
1998 // Store an int value at local variable slot Rindex.
1999 // Kills:
2000 // - Rindex
2001 void InterpreterMacroAssembler::store_local_float(FloatRegister Rvalue, Register Rindex) {
2002 sldi(Rindex, Rindex, Interpreter::logStackElementSize);
2003 subf(Rindex, Rindex, R18_locals);
2004 stfs(Rvalue, 0, Rindex);
2005 }
2006
2007 // Store an int value at local variable slot Rindex.
2008 // Kills:
2009 // - Rindex
2010 void InterpreterMacroAssembler::store_local_double(FloatRegister Rvalue, Register Rindex) {
2011 sldi(Rindex, Rindex, Interpreter::logStackElementSize);
2012 subf(Rindex, Rindex, R18_locals);
2013 stfd(Rvalue, -8, Rindex);
2014 }
2015
2016 // Read pending exception from thread and jump to interpreter.
2017 // Throw exception entry if one if pending. Fall through otherwise.
2018 void InterpreterMacroAssembler::check_and_forward_exception(Register Rscratch1, Register Rscratch2) {
2019 assert_different_registers(Rscratch1, Rscratch2, R3);
2020 Register Rexception = Rscratch1;
2021 Register Rtmp = Rscratch2;
2022 Label Ldone;
2023 // Get pending exception oop.
2024 ld(Rexception, thread_(pending_exception));
2025 cmpdi(CR0, Rexception, 0);
2026 beq(CR0, Ldone);
2027 li(Rtmp, 0);
2028 mr_if_needed(R3, Rexception);
2029 std(Rtmp, thread_(pending_exception)); // Clear exception in thread
2030 if (Interpreter::rethrow_exception_entry() != nullptr) {
2031 // Already got entry address.
2032 load_dispatch_table(Rtmp, (address*)Interpreter::rethrow_exception_entry());
2033 } else {
2034 // Dynamically load entry address.
2035 int simm16_rest = load_const_optimized(Rtmp, &Interpreter::_rethrow_exception_entry, R0, true);
2036 ld(Rtmp, simm16_rest, Rtmp);
2037 }
2038 mtctr(Rtmp);
2039 save_interpreter_state(Rtmp);
2040 bctr();
2041
2042 align(32, 12);
2043 bind(Ldone);
2044 }
2045
2046 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, bool check_exceptions, Label* last_java_pc) {
2047 save_interpreter_state(R11_scratch1);
2048
2049 MacroAssembler::call_VM(oop_result, entry_point, false /*check_exceptions*/, last_java_pc);
2050
2051 restore_interpreter_state(R11_scratch1, /*bcp_and_mdx_only*/ true);
2052
2053 check_and_handle_popframe(R11_scratch1);
2054 check_and_handle_earlyret(R11_scratch1);
2055 // Now check exceptions manually.
2056 if (check_exceptions) {
2057 check_and_forward_exception(R11_scratch1, R12_scratch2);
2058 }
2059 }
2060
2061 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point,
2062 Register arg_1, bool check_exceptions) {
2063 // ARG1 is reserved for the thread.
2064 mr_if_needed(R4_ARG2, arg_1);
2065 call_VM(oop_result, entry_point, check_exceptions);
2066 }
2067
2068 void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result, address entry_point,
2069 Register arg_1,
2070 bool check_exceptions) {
2071 if (!Continuations::enabled()) {
2072 call_VM(oop_result, entry_point, arg_1, check_exceptions);
2073 return;
2074 }
2075 call_VM_preemptable(oop_result, entry_point, arg_1, noreg /* arg_2 */, check_exceptions);
2076 }
2077
2078 void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result, address entry_point,
2079 Register arg_1, Register arg_2,
2080 bool check_exceptions) {
2081 if (!Continuations::enabled()) {
2082 call_VM(oop_result, entry_point, arg_1, arg_2, check_exceptions);
2083 return;
2084 }
2085
2086 Label resume_pc, not_preempted;
2087 Register tmp = R11_scratch1;
2088 assert_different_registers(arg_1, tmp);
2089 assert_different_registers(arg_2, tmp);
2090
2091 #ifdef ASSERT
2092 asm_assert_mem8_is_zero(in_bytes(JavaThread::preempt_alternate_return_offset()), R16_thread,
2093 "Should not have alternate return address set");
2094 // We check this counter in patch_return_pc_with_preempt_stub() during freeze.
2095 lwa(tmp, in_bytes(JavaThread::interp_at_preemptable_vmcall_cnt_offset()), R16_thread);
2096 addi(tmp, tmp, 1);
2097 cmpwi(CR0, tmp, 0);
2098 stw(tmp, in_bytes(JavaThread::interp_at_preemptable_vmcall_cnt_offset()), R16_thread);
2099 asm_assert(gt, "call_VM_preemptable: should be > 0");
2100 #endif // ASSERT
2101
2102 // Preserve 2 registers
2103 assert(nonvolatile_accross_vthread_preemtion(R31) && nonvolatile_accross_vthread_preemtion(R24), "");
2104 ld(R3_ARG1, _abi0(callers_sp), R1_SP); // load FP
2105 std(R31, _ijava_state_neg(lresult), R3_ARG1);
2106 std(R24, _ijava_state_neg(fresult), R3_ARG1);
2107
2108 // We set resume_pc as last java pc. It will be saved if the vthread gets preempted.
2109 // Later execution will continue right there.
2110 mr_if_needed(R4_ARG2, arg_1);
2111 assert(arg_2 != R4_ARG2, "smashed argument");
2112 mr_if_needed(R5_ARG3, arg_2, true /* allow_noreg */);
2113 push_cont_fastpath();
2114 call_VM(noreg /* oop_result */, entry_point, false /*check_exceptions*/, &resume_pc /* last_java_pc */);
2115 pop_cont_fastpath();
2116
2117 #ifdef ASSERT
2118 lwa(tmp, in_bytes(JavaThread::interp_at_preemptable_vmcall_cnt_offset()), R16_thread);
2119 addi(tmp, tmp, -1);
2120 cmpwi(CR0, tmp, 0);
2121 stw(tmp, in_bytes(JavaThread::interp_at_preemptable_vmcall_cnt_offset()), R16_thread);
2122 asm_assert(ge, "call_VM_preemptable: should be >= 0");
2123 #endif // ASSERT
2124
2125 // Jump to handler if the call was preempted
2126 ld(R0, in_bytes(JavaThread::preempt_alternate_return_offset()), R16_thread);
2127 cmpdi(CR0, R0, 0);
2128 beq(CR0, not_preempted);
2129 // Preempted. Frames are already frozen on heap.
2130 mtlr(R0);
2131 li(R0, 0);
2132 std(R0, in_bytes(JavaThread::preempt_alternate_return_offset()), R16_thread);
2133 blr();
2134
2135 bind(resume_pc); // Location to resume execution
2136 restore_after_resume(noreg /* fp */);
2137
2138 bind(not_preempted);
2139 if (check_exceptions) {
2140 check_and_forward_exception(R11_scratch1, R12_scratch2);
2141 }
2142 if (oop_result->is_valid()) {
2143 get_vm_result_oop(oop_result);
2144 }
2145 }
2146
2147 void InterpreterMacroAssembler::restore_after_resume(Register fp) {
2148 const address resume_adapter = TemplateInterpreter::cont_resume_interpreter_adapter();
2149 add_const_optimized(R31, R29_TOC, MacroAssembler::offset_to_global_toc(resume_adapter));
2150 mtctr(R31);
2151 bctrl();
2152 #ifdef ASSERT
2153 // Assert FP is in R11_scratch1 (see generate_cont_resume_interpreter_adapter())
2154 {
2155 Label ok;
2156 ld(R12_scratch2, 0, R1_SP); // load fp
2157 cmpd(CR0, R12_scratch2, R11_scratch1);
2158 beq(CR0, ok);
2159 stop(FILE_AND_LINE ": FP is expected in R11_scratch1");
2160 bind(ok);
2161 }
2162 #endif
2163 if (fp != noreg && fp != R11_scratch1) {
2164 mr(fp, R11_scratch1);
2165 }
2166 }
2167
2168 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point,
2169 Register arg_1, Register arg_2,
2170 bool check_exceptions) {
2171 // ARG1 is reserved for the thread.
2172 mr_if_needed(R4_ARG2, arg_1);
2173 assert(arg_2 != R4_ARG2, "smashed argument");
2174 mr_if_needed(R5_ARG3, arg_2);
2175 call_VM(oop_result, entry_point, check_exceptions);
2176 }
2177
2178 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point,
2179 Register arg_1, Register arg_2, Register arg_3,
2180 bool check_exceptions) {
2181 // ARG1 is reserved for the thread.
2182 mr_if_needed(R4_ARG2, arg_1);
2183 assert(arg_2 != R4_ARG2, "smashed argument");
2184 mr_if_needed(R5_ARG3, arg_2);
2185 assert(arg_3 != R4_ARG2 && arg_3 != R5_ARG3, "smashed argument");
2186 mr_if_needed(R6_ARG4, arg_3);
2187 call_VM(oop_result, entry_point, check_exceptions);
2188 }
2189
2190 void InterpreterMacroAssembler::save_interpreter_state(Register scratch) {
2191 ld(scratch, 0, R1_SP);
2192 subf(R0, scratch, R15_esp);
2193 sradi(R0, R0, Interpreter::logStackElementSize);
2194 std(R0, _ijava_state_neg(esp), scratch);
2195 std(R14_bcp, _ijava_state_neg(bcp), scratch);
2196 subf(R0, scratch, R26_monitor);
2197 sradi(R0, R0, Interpreter::logStackElementSize);
2198 std(R0, _ijava_state_neg(monitors), scratch);
2199 if (ProfileInterpreter) { std(R28_mdx, _ijava_state_neg(mdx), scratch); }
2200 // Other entries should be unchanged.
2201 }
2202
2203 void InterpreterMacroAssembler::restore_interpreter_state(Register scratch, bool bcp_and_mdx_only, bool restore_top_frame_sp) {
2204 ld_ptr(scratch, _abi0(callers_sp), R1_SP); // Load frame pointer.
2205 if (restore_top_frame_sp) {
2206 // After thawing the top frame of a continuation we reach here with frame::java_abi.
2207 // therefore we have to restore top_frame_sp before the assertion below.
2208 assert(!bcp_and_mdx_only, "chose other registers");
2209 Register tfsp = R18_locals;
2210 Register scratch2 = R26_monitor;
2211 ld(tfsp, _ijava_state_neg(top_frame_sp), scratch);
2212 // Derelativize top_frame_sp
2213 sldi(tfsp, tfsp, Interpreter::logStackElementSize);
2214 add(tfsp, tfsp, scratch);
2215 resize_frame_absolute(tfsp, scratch2, R0);
2216 }
2217 ld(R14_bcp, _ijava_state_neg(bcp), scratch); // Changed by VM code (exception).
2218 if (ProfileInterpreter) { ld(R28_mdx, _ijava_state_neg(mdx), scratch); } // Changed by VM code.
2219 if (!bcp_and_mdx_only) {
2220 // Following ones are Metadata.
2221 ld(R19_method, _ijava_state_neg(method), scratch);
2222 ld(R27_constPoolCache, _ijava_state_neg(cpoolCache), scratch);
2223 // Following ones are stack addresses and don't require reload.
2224 // Derelativize esp
2225 ld(R15_esp, _ijava_state_neg(esp), scratch);
2226 sldi(R15_esp, R15_esp, Interpreter::logStackElementSize);
2227 add(R15_esp, R15_esp, scratch);
2228 ld(R18_locals, _ijava_state_neg(locals), scratch);
2229 sldi(R18_locals, R18_locals, Interpreter::logStackElementSize);
2230 add(R18_locals, R18_locals, scratch);
2231 ld(R26_monitor, _ijava_state_neg(monitors), scratch);
2232 // Derelativize monitors
2233 sldi(R26_monitor, R26_monitor, Interpreter::logStackElementSize);
2234 add(R26_monitor, R26_monitor, scratch);
2235 }
2236 #ifdef ASSERT
2237 {
2238 Label Lok;
2239 subf(R0, R1_SP, scratch);
2240 cmpdi(CR0, R0, frame::top_ijava_frame_abi_size + frame::ijava_state_size);
2241 bge(CR0, Lok);
2242 stop("frame too small (restore istate)");
2243 bind(Lok);
2244 }
2245 #endif
2246 }
2247
2248 void InterpreterMacroAssembler::get_method_counters(Register method,
2249 Register Rcounters,
2250 Label& skip) {
2251 BLOCK_COMMENT("Load and ev. allocate counter object {");
2252 Label has_counters;
2253 ld(Rcounters, in_bytes(Method::method_counters_offset()), method);
2254 cmpdi(CR0, Rcounters, 0);
2255 bne(CR0, has_counters);
2256 call_VM(noreg, CAST_FROM_FN_PTR(address,
2257 InterpreterRuntime::build_method_counters), method);
2258 ld(Rcounters, in_bytes(Method::method_counters_offset()), method);
2259 cmpdi(CR0, Rcounters, 0);
2260 beq(CR0, skip); // No MethodCounters, OutOfMemory.
2261 BLOCK_COMMENT("} Load and ev. allocate counter object");
2262
2263 bind(has_counters);
2264 }
2265
2266 void InterpreterMacroAssembler::increment_invocation_counter(Register Rcounters,
2267 Register iv_be_count,
2268 Register Rtmp_r0) {
2269 assert(UseCompiler, "incrementing must be useful");
2270 Register invocation_count = iv_be_count;
2271 Register backedge_count = Rtmp_r0;
2272 int delta = InvocationCounter::count_increment;
2273
2274 // Load each counter in a register.
2275 // ld(inv_counter, Rtmp);
2276 // ld(be_counter, Rtmp2);
2277 int inv_counter_offset = in_bytes(MethodCounters::invocation_counter_offset() +
2278 InvocationCounter::counter_offset());
2279 int be_counter_offset = in_bytes(MethodCounters::backedge_counter_offset() +
2280 InvocationCounter::counter_offset());
2281
2282 BLOCK_COMMENT("Increment profiling counters {");
2283
2284 // Load the backedge counter.
2285 lwz(backedge_count, be_counter_offset, Rcounters); // is unsigned int
2286 // Mask the backedge counter.
2287 andi(backedge_count, backedge_count, InvocationCounter::count_mask_value);
2288
2289 // Load the invocation counter.
2290 lwz(invocation_count, inv_counter_offset, Rcounters); // is unsigned int
2291 // Add the delta to the invocation counter and store the result.
2292 addi(invocation_count, invocation_count, delta);
2293 // Store value.
2294 stw(invocation_count, inv_counter_offset, Rcounters);
2295
2296 // Add invocation counter + backedge counter.
2297 add(iv_be_count, backedge_count, invocation_count);
2298
2299 // Note that this macro must leave the backedge_count + invocation_count in
2300 // register iv_be_count!
2301 BLOCK_COMMENT("} Increment profiling counters");
2302 }
2303
2304 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
2305 if (state == atos) { MacroAssembler::verify_oop(reg, FILE_AND_LINE); }
2306 }
2307
2308 // Local helper function for the verify_oop_or_return_address macro.
2309 static bool verify_return_address(Method* m, int bci) {
2310 #ifndef PRODUCT
2311 address pc = (address)(m->constMethod()) + in_bytes(ConstMethod::codes_offset()) + bci;
2312 // Assume it is a valid return address if it is inside m and is preceded by a jsr.
2313 if (!m->contains(pc)) return false;
2314 address jsr_pc;
2315 jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr);
2316 if (*jsr_pc == Bytecodes::_jsr && jsr_pc >= m->code_base()) return true;
2317 jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr_w);
2318 if (*jsr_pc == Bytecodes::_jsr_w && jsr_pc >= m->code_base()) return true;
2319 #endif // PRODUCT
2320 return false;
2321 }
2322
2323 void InterpreterMacroAssembler::verify_oop_or_return_address(Register reg, Register Rtmp) {
2324 if (!VerifyOops) return;
2325
2326 // The VM documentation for the astore[_wide] bytecode allows
2327 // the TOS to be not only an oop but also a return address.
2328 Label test;
2329 Label skip;
2330 // See if it is an address (in the current method):
2331
2332 const int log2_bytecode_size_limit = 16;
2333 srdi_(Rtmp, reg, log2_bytecode_size_limit);
2334 bne(CR0, test);
2335
2336 address fd = CAST_FROM_FN_PTR(address, verify_return_address);
2337 const int nbytes_save = MacroAssembler::num_volatile_regs * 8;
2338 save_volatile_gprs(R1_SP, -nbytes_save); // except R0
2339 save_LR_CR(Rtmp); // Save in old frame.
2340 push_frame_reg_args(nbytes_save, Rtmp);
2341
2342 load_const_optimized(Rtmp, fd, R0);
2343 mr_if_needed(R4_ARG2, reg);
2344 mr(R3_ARG1, R19_method);
2345 call_c(Rtmp); // call C
2346
2347 pop_frame();
2348 restore_LR_CR(Rtmp);
2349 restore_volatile_gprs(R1_SP, -nbytes_save); // except R0
2350 b(skip);
2351
2352 // Perform a more elaborate out-of-line call.
2353 // Not an address; verify it:
2354 bind(test);
2355 verify_oop(reg);
2356 bind(skip);
2357 }
2358
2359 // Inline assembly for:
2360 //
2361 // if (thread is in interp_only_mode) {
2362 // InterpreterRuntime::post_method_entry();
2363 // }
2364 // if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY ) ||
2365 // *jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY2) ) {
2366 // SharedRuntime::jvmpi_method_entry(method, receiver);
2367 // }
2368 void InterpreterMacroAssembler::notify_method_entry() {
2369 // JVMTI
2370 // Whenever JVMTI puts a thread in interp_only_mode, method
2371 // entry/exit events are sent for that thread to track stack
2372 // depth. If it is possible to enter interp_only_mode we add
2373 // the code to check if the event should be sent.
2374 if (JvmtiExport::can_post_interpreter_events()) {
2375 Label jvmti_post_done;
2376
2377 lwz(R0, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
2378 cmpwi(CR0, R0, 0);
2379 beq(CR0, jvmti_post_done);
2380 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
2381
2382 bind(jvmti_post_done);
2383 }
2384 }
2385
2386 // Inline assembly for:
2387 //
2388 // if (thread is in interp_only_mode) {
2389 // // save result
2390 // InterpreterRuntime::post_method_exit();
2391 // // restore result
2392 // }
2393 // if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_EXIT)) {
2394 // // save result
2395 // SharedRuntime::jvmpi_method_exit();
2396 // // restore result
2397 // }
2398 //
2399 // Native methods have their result stored in d_tmp and l_tmp.
2400 // Java methods have their result stored in the expression stack.
2401 void InterpreterMacroAssembler::notify_method_exit(bool is_native_method, TosState state,
2402 NotifyMethodExitMode mode, bool check_exceptions) {
2403 // JVMTI
2404 // Whenever JVMTI puts a thread in interp_only_mode, method
2405 // entry/exit events are sent for that thread to track stack
2406 // depth. If it is possible to enter interp_only_mode we add
2407 // the code to check if the event should be sent.
2408 if (mode == NotifyJVMTI && (JvmtiExport::can_post_interpreter_events() || JvmtiExport::can_post_frame_pop())) {
2409 Label jvmti_post_done;
2410
2411 // if (thread->jvmti_thread_state() == nullptr) exit;
2412 ld(R11_scratch1, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread);
2413 cmpdi(CR0, R11_scratch1, 0);
2414 beq(CR0, jvmti_post_done);
2415
2416 // if (interp_only_mode() == false && frame_pop_cnt() == 0) exit;
2417 lwz(R12_scratch2, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread);
2418 lwz(R11_scratch1, in_bytes(JvmtiThreadState::frame_pop_cnt_offset()), R11_scratch1);
2419 or_(R0, R11_scratch1, R12_scratch2);
2420 beq(CR0, jvmti_post_done);
2421
2422 if (!is_native_method) { push(state); } // Expose tos to GC.
2423 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit), check_exceptions);
2424 if (!is_native_method) { pop(state); }
2425
2426 align(32, 12);
2427 bind(jvmti_post_done);
2428 }
2429
2430 // Dtrace support not implemented.
2431 }
2432
2433 void InterpreterMacroAssembler::read_flat_field(Register entry, Register obj) {
2434 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field), obj, entry);
2435 }
2436
2437 void InterpreterMacroAssembler::write_flat_field(Register entry, Register tmp1, Register tmp2,
2438 Register obj, Register field_offset, Register value) {
2439 assert_different_registers(entry, field_offset, tmp1, tmp2, obj, value);
2440 Label slow_path, done;
2441
2442 lbz(tmp1, in_bytes(ResolvedFieldEntry::flags_offset()), entry);
2443 test_field_is_not_null_free_inline_type(tmp1, slow_path);
2444
2445 null_check_throw(value, -1, tmp1);
2446
2447 add(obj, obj, field_offset);
2448
2449 load_klass(tmp1, value);
2450 payload_address(value, value, tmp1, tmp2);
2451
2452 Register layout_info = field_offset;
2453 lbz(tmp1, in_bytes(ResolvedFieldEntry::field_index_offset()), entry);
2454 ld(tmp2, in_bytes(ResolvedFieldEntry::field_holder_offset()), entry);
2455 inline_layout_info(tmp2, tmp1, layout_info);
2456
2457 flat_field_copy(IN_HEAP, value, obj, layout_info);
2458 b(done);
2459
2460 bind(slow_path);
2461 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flat_field), obj, value, entry);
2462 bind(done);
2463 }