1 /*
2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016 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 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "interpreter/abstractInterpreter.hpp"
29 #include "interpreter/bytecodeHistogram.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/interp_masm.hpp"
33 #include "interpreter/templateInterpreterGenerator.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "oops/arrayOop.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/synchronizer.hpp"
45 #include "runtime/timer.hpp"
46 #include "runtime/vframeArray.hpp"
47 #include "utilities/debug.hpp"
48
49
50 // Size of interpreter code. Increase if too small. Interpreter will
51 // fail with a guarantee ("not enough space for interpreter generation");
52 // if too small.
53 // Run with +PrintInterpreter to get the VM to print out the size.
54 // Max size with JVMTI
55 int TemplateInterpreter::InterpreterCodeSize = 320*K;
56
57 #undef __
58 #ifdef PRODUCT
59 #define __ _masm->
60 #else
61 #define __ _masm->
62 // #define __ (Verbose ? (_masm->block_comment(FILE_AND_LINE),_masm):_masm)->
63 #endif
64
65 #define BLOCK_COMMENT(str) __ block_comment(str)
66 #define BIND(label) __ bind(label); BLOCK_COMMENT(#label ":")
67
68 #define oop_tmp_offset _z_ijava_state_neg(oop_tmp)
69
70 //-----------------------------------------------------------------------------
71
72 address TemplateInterpreterGenerator::generate_slow_signature_handler() {
73 //
74 // New slow_signature handler that respects the z/Architecture
75 // C calling conventions.
76 //
77 // We get called by the native entry code with our output register
78 // area == 8. First we call InterpreterRuntime::get_result_handler
79 // to copy the pointer to the signature string temporarily to the
80 // first C-argument and to return the result_handler in
81 // Z_RET. Since native_entry will copy the jni-pointer to the
82 // first C-argument slot later on, it's OK to occupy this slot
83 // temporarily. Then we copy the argument list on the java
84 // expression stack into native varargs format on the native stack
85 // and load arguments into argument registers. Integer arguments in
86 // the varargs vector will be sign-extended to 8 bytes.
87 //
88 // On entry:
89 // Z_ARG1 - intptr_t* Address of java argument list in memory.
90 // Z_state - cppInterpreter* Address of interpreter state for
91 // this method
92 // Z_method
93 //
94 // On exit (just before return instruction):
95 // Z_RET contains the address of the result_handler.
96 // Z_ARG2 is not updated for static methods and contains "this" otherwise.
97 // Z_ARG3-Z_ARG5 contain the first 3 arguments of types other than float and double.
98 // Z_FARG1-Z_FARG4 contain the first 4 arguments of type float or double.
99
100 const int LogSizeOfCase = 3;
101
102 const int max_fp_register_arguments = Argument::n_float_register_parameters;
103 const int max_int_register_arguments = Argument::n_register_parameters - 2; // First 2 are reserved.
104
105 const Register arg_java = Z_tmp_2;
106 const Register arg_c = Z_tmp_3;
107 const Register signature = Z_R1_scratch; // Is a string.
108 const Register fpcnt = Z_R0_scratch;
109 const Register argcnt = Z_tmp_4;
110 const Register intSlot = Z_tmp_1;
111 const Register sig_end = Z_tmp_1; // Assumed end of signature (only used in do_object).
112 const Register target_sp = Z_tmp_1;
113 const FloatRegister floatSlot = Z_F1;
114
115 const int d_signature = _z_abi(gpr6); // Only spill space, register contents not affected.
116 const int d_fpcnt = _z_abi(gpr7); // Only spill space, register contents not affected.
117
118 unsigned int entry_offset = __ offset();
119
120 BLOCK_COMMENT("slow_signature_handler {");
121
122 // We use target_sp for storing arguments in the C frame.
123 __ save_return_pc();
124
125 __ z_stmg(Z_R10,Z_R13,-32,Z_SP);
126 __ push_frame_abi160(32);
127
128 __ z_lgr(arg_java, Z_ARG1);
129
130 Register method = Z_ARG2; // Directly load into correct argument register.
131
132 __ get_method(method);
133 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_signature), Z_thread, method);
134
135 // Move signature to callee saved register.
136 // Don't directly write to stack. Frame is used by VM call.
137 __ z_lgr(Z_tmp_1, Z_RET);
138
139 // Reload method. Register may have been altered by VM call.
140 __ get_method(method);
141
142 // Get address of result handler.
143 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_result_handler), Z_thread, method);
144
145 // Save signature address to stack.
146 __ z_stg(Z_tmp_1, d_signature, Z_SP);
147
148 // Don't overwrite return value (Z_RET, Z_ARG1) in rest of the method !
149
150 {
151 Label isStatic;
152
153 // Test if static.
154 // We can test the bit directly.
155 // Path is Z_method->_access_flags._flags.
156 // We only support flag bits in the least significant byte (assert !).
157 // Therefore add 3 to address that byte within "_flags".
158 // Reload method. VM call above may have destroyed register contents
159 __ get_method(method);
160 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT);
161 method = noreg; // end of life
162 __ z_btrue(isStatic);
163
164 // For non-static functions, pass "this" in Z_ARG2 and copy it to 2nd C-arg slot.
165 // Need to box the Java object here, so we use arg_java
166 // (address of current Java stack slot) as argument and
167 // don't dereference it as in case of ints, floats, etc..
168 __ z_lgr(Z_ARG2, arg_java);
169 __ add2reg(arg_java, -BytesPerWord);
170 __ bind(isStatic);
171 }
172
173 // argcnt == 0 corresponds to 3rd C argument.
174 // arg #1 (result handler) and
175 // arg #2 (this, for non-statics), unused else
176 // are reserved and pre-filled above.
177 // arg_java points to the corresponding Java argument here. It
178 // has been decremented by one argument (this) in case of non-static.
179 __ clear_reg(argcnt, true, false); // Don't set CC.
180 __ z_lg(target_sp, 0, Z_SP);
181 __ add2reg(arg_c, _z_abi(remaining_cargs), target_sp);
182 // No floating-point args parsed so far.
183 __ clear_mem(Address(Z_SP, d_fpcnt), 8);
184
185 NearLabel move_intSlot_to_ARG, move_floatSlot_to_FARG;
186 NearLabel loop_start, loop_start_restore, loop_end;
187 NearLabel do_int, do_long, do_float, do_double;
188 NearLabel do_dontreachhere, do_object, do_array, do_boxed;
189
190 #ifdef ASSERT
191 // Signature needs to point to '(' (== 0x28) at entry.
192 __ z_lg(signature, d_signature, Z_SP);
193 __ z_cli(0, signature, (int) '(');
194 __ z_brne(do_dontreachhere);
195 #endif
196
197 __ bind(loop_start_restore);
198 __ z_lg(signature, d_signature, Z_SP); // Restore signature ptr, destroyed by move_XX_to_ARG.
199
200 BIND(loop_start);
201 // Advance to next argument type token from the signature.
202 __ add2reg(signature, 1);
203
204 // Use CLI, works well on all CPU versions.
205 __ z_cli(0, signature, (int) ')');
206 __ z_bre(loop_end); // end of signature
207 __ z_cli(0, signature, (int) 'L');
208 __ z_bre(do_object); // object #9
209 __ z_cli(0, signature, (int) 'F');
210 __ z_bre(do_float); // float #7
211 __ z_cli(0, signature, (int) 'J');
212 __ z_bre(do_long); // long #6
213 __ z_cli(0, signature, (int) 'B');
214 __ z_bre(do_int); // byte #1
215 __ z_cli(0, signature, (int) 'Z');
216 __ z_bre(do_int); // boolean #2
217 __ z_cli(0, signature, (int) 'C');
218 __ z_bre(do_int); // char #3
219 __ z_cli(0, signature, (int) 'S');
220 __ z_bre(do_int); // short #4
221 __ z_cli(0, signature, (int) 'I');
222 __ z_bre(do_int); // int #5
223 __ z_cli(0, signature, (int) 'D');
224 __ z_bre(do_double); // double #8
225 __ z_cli(0, signature, (int) '[');
226 __ z_bre(do_array); // array #10
227
228 __ bind(do_dontreachhere);
229
230 __ unimplemented("ShouldNotReachHere in slow_signature_handler", 120);
231
232 // Array argument
233 BIND(do_array);
234
235 {
236 Label start_skip, end_skip;
237
238 __ bind(start_skip);
239
240 // Advance to next type tag from signature.
241 __ add2reg(signature, 1);
242
243 // Use CLI, works well on all CPU versions.
244 __ z_cli(0, signature, (int) '[');
245 __ z_bre(start_skip); // Skip further brackets.
246
247 __ z_cli(0, signature, (int) '9');
248 __ z_brh(end_skip); // no optional size
249
250 __ z_cli(0, signature, (int) '0');
251 __ z_brnl(start_skip); // Skip optional size.
252
253 __ bind(end_skip);
254
255 __ z_cli(0, signature, (int) 'L');
256 __ z_brne(do_boxed); // If not array of objects: go directly to do_boxed.
257 }
258
259 // OOP argument
260 BIND(do_object);
261 // Pass by an object's type name.
262 {
263 Label L;
264
265 __ add2reg(sig_end, 4095, signature); // Assume object type name is shorter than 4k.
266 __ load_const_optimized(Z_R0, (int) ';'); // Type name terminator (must be in Z_R0!).
267 __ MacroAssembler::search_string(sig_end, signature);
268 __ z_brl(L);
269 __ z_illtrap(); // No semicolon found: internal error or object name too long.
270 __ bind(L);
271 __ z_lgr(signature, sig_end);
272 // fallthru to do_boxed
273 }
274
275 // Need to box the Java object here, so we use arg_java
276 // (address of current Java stack slot) as argument and
277 // don't dereference it as in case of ints, floats, etc..
278
279 // UNBOX argument
280 // Load reference and check for NULL.
281 Label do_int_Entry4Boxed;
282 __ bind(do_boxed);
283 {
284 __ load_and_test_long(intSlot, Address(arg_java));
285 __ z_bre(do_int_Entry4Boxed);
286 __ z_lgr(intSlot, arg_java);
287 __ z_bru(do_int_Entry4Boxed);
288 }
289
290 // INT argument
291
292 // (also for byte, boolean, char, short)
293 // Use lgf for load (sign-extend) and stg for store.
294 BIND(do_int);
295 __ z_lgf(intSlot, 0, arg_java);
296
297 __ bind(do_int_Entry4Boxed);
298 __ add2reg(arg_java, -BytesPerWord);
299 // If argument fits into argument register, go and handle it, otherwise continue.
300 __ compare32_and_branch(argcnt, max_int_register_arguments,
301 Assembler::bcondLow, move_intSlot_to_ARG);
302 __ z_stg(intSlot, 0, arg_c);
303 __ add2reg(arg_c, BytesPerWord);
304 __ z_bru(loop_start);
305
306 // LONG argument
307
308 BIND(do_long);
309 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg.
310 __ z_lg(intSlot, BytesPerWord, arg_java);
311 // If argument fits into argument register, go and handle it, otherwise continue.
312 __ compare32_and_branch(argcnt, max_int_register_arguments,
313 Assembler::bcondLow, move_intSlot_to_ARG);
314 __ z_stg(intSlot, 0, arg_c);
315 __ add2reg(arg_c, BytesPerWord);
316 __ z_bru(loop_start);
317
318 // FLOAT argumen
319
320 BIND(do_float);
321 __ z_le(floatSlot, 0, arg_java);
322 __ add2reg(arg_java, -BytesPerWord);
323 assert(max_fp_register_arguments <= 255, "always true"); // safety net
324 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments);
325 __ z_brl(move_floatSlot_to_FARG);
326 __ z_ste(floatSlot, 4, arg_c);
327 __ add2reg(arg_c, BytesPerWord);
328 __ z_bru(loop_start);
329
330 // DOUBLE argument
331
332 BIND(do_double);
333 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg.
334 __ z_ld(floatSlot, BytesPerWord, arg_java);
335 assert(max_fp_register_arguments <= 255, "always true"); // safety net
336 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments);
337 __ z_brl(move_floatSlot_to_FARG);
338 __ z_std(floatSlot, 0, arg_c);
339 __ add2reg(arg_c, BytesPerWord);
340 __ z_bru(loop_start);
341
342 // Method exit, all arguments proocessed.
343 __ bind(loop_end);
344 __ pop_frame();
345 __ restore_return_pc();
346 __ z_lmg(Z_R10,Z_R13,-32,Z_SP);
347 __ z_br(Z_R14);
348
349 // Copy int arguments.
350
351 Label iarg_caselist; // Distance between each case has to be a power of 2
352 // (= 1 << LogSizeOfCase).
353 __ align(16);
354 BIND(iarg_caselist);
355 __ z_lgr(Z_ARG3, intSlot); // 4 bytes
356 __ z_bru(loop_start_restore); // 4 bytes
357
358 __ z_lgr(Z_ARG4, intSlot);
359 __ z_bru(loop_start_restore);
360
361 __ z_lgr(Z_ARG5, intSlot);
362 __ z_bru(loop_start_restore);
363
364 __ align(16);
365 __ bind(move_intSlot_to_ARG);
366 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch.
367 __ z_larl(Z_R1_scratch, iarg_caselist);
368 __ z_sllg(Z_R0_scratch, argcnt, LogSizeOfCase);
369 __ add2reg(argcnt, 1);
370 __ z_agr(Z_R1_scratch, Z_R0_scratch);
371 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch);
372
373 // Copy float arguments.
374
375 Label farg_caselist; // Distance between each case has to be a power of 2
376 // (= 1 << logSizeOfCase, padded with nop.
377 __ align(16);
378 BIND(farg_caselist);
379 __ z_ldr(Z_FARG1, floatSlot); // 2 bytes
380 __ z_bru(loop_start_restore); // 4 bytes
381 __ z_nop(); // 2 bytes
382
383 __ z_ldr(Z_FARG2, floatSlot);
384 __ z_bru(loop_start_restore);
385 __ z_nop();
386
387 __ z_ldr(Z_FARG3, floatSlot);
388 __ z_bru(loop_start_restore);
389 __ z_nop();
390
391 __ z_ldr(Z_FARG4, floatSlot);
392 __ z_bru(loop_start_restore);
393 __ z_nop();
394
395 __ align(16);
396 __ bind(move_floatSlot_to_FARG);
397 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch.
398 __ z_lg(Z_R0_scratch, d_fpcnt, Z_SP); // Need old value for indexing.
399 __ add2mem_64(Address(Z_SP, d_fpcnt), 1, Z_R1_scratch); // Increment index.
400 __ z_larl(Z_R1_scratch, farg_caselist);
401 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogSizeOfCase);
402 __ z_agr(Z_R1_scratch, Z_R0_scratch);
403 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch);
404
405 BLOCK_COMMENT("} slow_signature_handler");
406
407 return __ addr_at(entry_offset);
408 }
409
410 address TemplateInterpreterGenerator::generate_result_handler_for (BasicType type) {
411 address entry = __ pc();
412
413 assert(Z_tos == Z_RET, "Result handler: must move result!");
414 assert(Z_ftos == Z_FRET, "Result handler: must move float result!");
415
416 switch (type) {
417 case T_BOOLEAN:
418 __ c2bool(Z_tos);
419 break;
420 case T_CHAR:
421 __ and_imm(Z_tos, 0xffff);
422 break;
423 case T_BYTE:
424 __ z_lbr(Z_tos, Z_tos);
425 break;
426 case T_SHORT:
427 __ z_lhr(Z_tos, Z_tos);
428 break;
429 case T_INT:
430 case T_LONG:
431 case T_VOID:
432 case T_FLOAT:
433 case T_DOUBLE:
434 break;
435 case T_OBJECT:
436 // Retrieve result from frame...
437 __ mem2reg_opt(Z_tos, Address(Z_fp, oop_tmp_offset));
438 // and verify it.
439 __ verify_oop(Z_tos);
440 break;
441 default:
442 ShouldNotReachHere();
443 }
444 __ z_br(Z_R14); // Return from result handler.
445 return entry;
446 }
447
448 // Abstract method entry.
449 // Attempt to execute abstract method. Throw exception.
450 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
451 unsigned int entry_offset = __ offset();
452
453 // Caller could be the call_stub or a compiled method (x86 version is wrong!).
454
455 BLOCK_COMMENT("abstract_entry {");
456
457 // Implement call of InterpreterRuntime::throw_AbstractMethodError.
458 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1);
459 __ save_return_pc(); // Save Z_R14.
460 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14.
461
462 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError), Z_thread);
463
464 __ pop_frame();
465 __ restore_return_pc(); // Restore Z_R14.
466 __ reset_last_Java_frame();
467
468 // Restore caller sp for c2i case.
469 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
470
471 // branch to SharedRuntime::generate_forward_exception() which handles all possible callers,
472 // i.e. call stub, compiled method, interpreted method.
473 __ load_absolute_address(Z_tmp_1, StubRoutines::forward_exception_entry());
474 __ z_br(Z_tmp_1);
475
476 BLOCK_COMMENT("} abstract_entry");
477
478 return __ addr_at(entry_offset);
479 }
480
481 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
482 #if INCLUDE_ALL_GCS
483 if (UseG1GC) {
484 // Inputs:
485 // Z_ARG1 - receiver
486 //
487 // What we do:
488 // - Load the referent field address.
489 // - Load the value in the referent field.
490 // - Pass that value to the pre-barrier.
491 //
492 // In the case of G1 this will record the value of the
493 // referent in an SATB buffer if marking is active.
494 // This will cause concurrent marking to mark the referent
495 // field as live.
496
497 Register scratch1 = Z_tmp_2;
498 Register scratch2 = Z_tmp_3;
499 Register pre_val = Z_RET; // return value
500 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
501 Register Rargp = Z_esp;
502
503 Label slow_path;
504 address entry = __ pc();
505
506 const int referent_offset = java_lang_ref_Reference::referent_offset;
507 guarantee(referent_offset > 0, "referent offset not initialized");
508
509 BLOCK_COMMENT("Reference_get {");
510
511 // If the receiver is null then it is OK to jump to the slow path.
512 __ load_and_test_long(pre_val, Address(Rargp, Interpreter::stackElementSize)); // Get receiver.
513 __ z_bre(slow_path);
514
515 // Load the value of the referent field.
516 __ load_heap_oop(pre_val, referent_offset, pre_val);
517
518 // Restore caller sp for c2i case.
519 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
520
521 // Generate the G1 pre-barrier code to log the value of
522 // the referent field in an SATB buffer.
523 // Note:
524 // With these parameters the write_barrier_pre does not
525 // generate instructions to load the previous value.
526 __ g1_write_barrier_pre(noreg, // obj
527 noreg, // offset
528 pre_val, // pre_val
529 noreg, // no new val to preserve
530 scratch1, // tmp
531 scratch2, // tmp
532 true); // pre_val_needed
533
534 __ z_br(Z_R14);
535
536 // Branch to previously generated regular method entry.
537 __ bind(slow_path);
538
539 address meth_entry = Interpreter::entry_for_kind(Interpreter::zerolocals);
540 __ jump_to_entry(meth_entry, Z_R1);
541
542 BLOCK_COMMENT("} Reference_get");
543
544 return entry;
545 }
546 #endif // INCLUDE_ALL_GCS
547
548 return NULL;
549 }
550
551 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
552 address entry = __ pc();
553
554 DEBUG_ONLY(__ verify_esp(Z_esp, Z_ARG5));
555
556 // Restore bcp under the assumption that the current frame is still
557 // interpreted.
558 __ restore_bcp();
559
560 // Expression stack must be empty before entering the VM if an
561 // exception happened.
562 __ empty_expression_stack();
563 // Throw exception.
564 __ call_VM(noreg,
565 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
566 return entry;
567 }
568
569 //
570 // Args:
571 // Z_ARG3: aberrant index
572 //
573 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char * name) {
574 address entry = __ pc();
575 address excp = CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException);
576
577 // Expression stack must be empty before entering the VM if an
578 // exception happened.
579 __ empty_expression_stack();
580
581 // Setup parameters.
582 // Leave out the name and use register for array to create more detailed exceptions.
583 __ load_absolute_address(Z_ARG2, (address) name);
584 __ call_VM(noreg, excp, Z_ARG2, Z_ARG3);
585 return entry;
586 }
587
588 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
589 address entry = __ pc();
590
591 // Object is at TOS.
592 __ pop_ptr(Z_ARG2);
593
594 // Expression stack must be empty before entering the VM if an
595 // exception happened.
596 __ empty_expression_stack();
597
598 __ call_VM(Z_ARG1,
599 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException),
600 Z_ARG2);
601
602 DEBUG_ONLY(__ should_not_reach_here();)
603
604 return entry;
605 }
606
607 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
608 assert(!pass_oop || message == NULL, "either oop or message but not both");
609 address entry = __ pc();
610
611 BLOCK_COMMENT("exception_handler_common {");
612
613 // Expression stack must be empty before entering the VM if an
614 // exception happened.
615 __ empty_expression_stack();
616 if (name != NULL) {
617 __ load_absolute_address(Z_ARG2, (address)name);
618 } else {
619 __ clear_reg(Z_ARG2, true, false);
620 }
621
622 if (pass_oop) {
623 __ call_VM(Z_tos,
624 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception),
625 Z_ARG2, Z_tos /*object (see TT::aastore())*/);
626 } else {
627 if (message != NULL) {
628 __ load_absolute_address(Z_ARG3, (address)message);
629 } else {
630 __ clear_reg(Z_ARG3, true, false);
631 }
632 __ call_VM(Z_tos,
633 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
634 Z_ARG2, Z_ARG3);
635 }
636 // Throw exception.
637 __ load_absolute_address(Z_R1_scratch, Interpreter::throw_exception_entry());
638 __ z_br(Z_R1_scratch);
639
640 BLOCK_COMMENT("} exception_handler_common");
641
642 return entry;
643 }
644
645 address TemplateInterpreterGenerator::generate_return_entry_for (TosState state, int step, size_t index_size) {
646 address entry = __ pc();
647
648 BLOCK_COMMENT("return_entry {");
649
650 // Pop i2c extension or revert top-2-parent-resize done by interpreted callees.
651 Register sp_before_i2c_extension = Z_bcp;
652 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
653 __ z_lg(sp_before_i2c_extension, Address(Z_fp, _z_ijava_state_neg(top_frame_sp)));
654 __ resize_frame_absolute(sp_before_i2c_extension, Z_locals/*tmp*/, true/*load_fp*/);
655
656 // TODO(ZASM): necessary??
657 // // and NULL it as marker that esp is now tos until next java call
658 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
659
660 __ restore_bcp();
661 __ restore_locals();
662 __ restore_esp();
663
664 if (state == atos) {
665 __ profile_return_type(Z_tmp_1, Z_tos, Z_tmp_2);
666 }
667
668 Register cache = Z_tmp_1;
669 Register size = Z_tmp_1;
670 Register offset = Z_tmp_2;
671 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
672 ConstantPoolCacheEntry::flags_offset());
673 __ get_cache_and_index_at_bcp(cache, offset, 1, index_size);
674
675 // #args is in rightmost byte of the _flags field.
676 __ z_llgc(size, Address(cache, offset, flags_offset+(sizeof(size_t)-1)));
677 __ z_sllg(size, size, Interpreter::logStackElementSize); // Each argument size in bytes.
678 __ z_agr(Z_esp, size); // Pop arguments.
679
680 __ check_and_handle_popframe(Z_thread);
681 __ check_and_handle_earlyret(Z_thread);
682
683 __ dispatch_next(state, step);
684
685 BLOCK_COMMENT("} return_entry");
686
687 return entry;
688 }
689
690 address TemplateInterpreterGenerator::generate_deopt_entry_for (TosState state,
691 int step) {
692 address entry = __ pc();
693
694 BLOCK_COMMENT("deopt_entry {");
695
696 // TODO(ZASM): necessary? NULL last_sp until next java call
697 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
698 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
699 __ restore_bcp();
700 __ restore_locals();
701 __ restore_esp();
702
703 // Handle exceptions.
704 {
705 Label L;
706 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception));
707 __ z_bre(L);
708 __ call_VM(noreg,
709 CAST_FROM_FN_PTR(address,
710 InterpreterRuntime::throw_pending_exception));
711 __ should_not_reach_here();
712 __ bind(L);
713 }
714 __ dispatch_next(state, step);
715
716 BLOCK_COMMENT("} deopt_entry");
717
718 return entry;
719 }
720
721 address TemplateInterpreterGenerator::generate_safept_entry_for (TosState state,
722 address runtime_entry) {
723 address entry = __ pc();
724 __ push(state);
725 __ call_VM(noreg, runtime_entry);
726 __ dispatch_via(vtos, Interpreter::_normal_table.table_for (vtos));
727 return entry;
728 }
729
730 //
731 // Helpers for commoning out cases in the various type of method entries.
732 //
733
734 // Increment invocation count & check for overflow.
735 //
736 // Note: checking for negative value instead of overflow
737 // so we have a 'sticky' overflow test.
738 //
739 // Z_ARG2: method (see generate_fixed_frame())
740 //
741 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
742 Label done;
743 Register method = Z_ARG2; // Generate_fixed_frame() copies Z_method into Z_ARG2.
744 Register m_counters = Z_ARG4;
745
746 BLOCK_COMMENT("counter_incr {");
747
748 // Note: In tiered we increment either counters in method or in MDO depending
749 // if we are profiling or not.
750 if (TieredCompilation) {
751 int increment = InvocationCounter::count_increment;
752 if (ProfileInterpreter) {
753 NearLabel no_mdo;
754 Register mdo = m_counters;
755 // Are we profiling?
756 __ load_and_test_long(mdo, method2_(method, method_data));
757 __ branch_optimized(Assembler::bcondZero, no_mdo);
758 // Increment counter in the MDO.
759 const Address mdo_invocation_counter(mdo, MethodData::invocation_counter_offset() +
760 InvocationCounter::counter_offset());
761 const Address mask(mdo, MethodData::invoke_mask_offset());
762 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask,
763 Z_R1_scratch, false, Assembler::bcondZero,
764 overflow);
765 __ z_bru(done);
766 __ bind(no_mdo);
767 }
768
769 // Increment counter in MethodCounters.
770 const Address invocation_counter(m_counters,
771 MethodCounters::invocation_counter_offset() +
772 InvocationCounter::counter_offset());
773 // Get address of MethodCounters object.
774 __ get_method_counters(method, m_counters, done);
775 const Address mask(m_counters, MethodCounters::invoke_mask_offset());
776 __ increment_mask_and_jump(invocation_counter,
777 increment, mask,
778 Z_R1_scratch, false, Assembler::bcondZero,
779 overflow);
780 } else {
781 Register counter_sum = Z_ARG3; // The result of this piece of code.
782 Register tmp = Z_R1_scratch;
783 #ifdef ASSERT
784 {
785 NearLabel ok;
786 __ get_method(tmp);
787 __ compare64_and_branch(method, tmp, Assembler::bcondEqual, ok);
788 __ z_illtrap(0x66);
789 __ bind(ok);
790 }
791 #endif
792
793 // Get address of MethodCounters object.
794 __ get_method_counters(method, m_counters, done);
795 // Update standard invocation counters.
796 __ increment_invocation_counter(m_counters, counter_sum);
797 if (ProfileInterpreter) {
798 __ add2mem_32(Address(m_counters, MethodCounters::interpreter_invocation_counter_offset()), 1, tmp);
799 if (profile_method != NULL) {
800 const Address profile_limit(m_counters, MethodCounters::interpreter_profile_limit_offset());
801 __ z_cl(counter_sum, profile_limit);
802 __ branch_optimized(Assembler::bcondLow, *profile_method_continue);
803 // If no method data exists, go to profile_method.
804 __ test_method_data_pointer(tmp, *profile_method);
805 }
806 }
807
808 const Address invocation_limit(m_counters, MethodCounters::interpreter_invocation_limit_offset());
809 __ z_cl(counter_sum, invocation_limit);
810 __ branch_optimized(Assembler::bcondNotLow, *overflow);
811 }
812
813 __ bind(done);
814
815 BLOCK_COMMENT("} counter_incr");
816 }
817
818 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
819 // InterpreterRuntime::frequency_counter_overflow takes two
820 // arguments, the first (thread) is passed by call_VM, the second
821 // indicates if the counter overflow occurs at a backwards branch
822 // (NULL bcp). We pass zero for it. The call returns the address
823 // of the verified entry point for the method or NULL if the
824 // compilation did not complete (either went background or bailed
825 // out).
826 __ clear_reg(Z_ARG2);
827 __ call_VM(noreg,
828 CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow),
829 Z_ARG2);
830 __ z_bru(do_continue);
831 }
832
833 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register frame_size, Register tmp1) {
834 Register tmp2 = Z_R1_scratch;
835 const int page_size = os::vm_page_size();
836 NearLabel after_frame_check;
837
838 BLOCK_COMMENT("counter_overflow {");
839
840 assert_different_registers(frame_size, tmp1);
841
842 // Stack banging is sufficient overflow check if frame_size < page_size.
843 if (Immediate::is_uimm(page_size, 15)) {
844 __ z_chi(frame_size, page_size);
845 __ z_brl(after_frame_check);
846 } else {
847 __ load_const_optimized(tmp1, page_size);
848 __ compareU32_and_branch(frame_size, tmp1, Assembler::bcondLow, after_frame_check);
849 }
850
851 // Get the stack base, and in debug, verify it is non-zero.
852 __ z_lg(tmp1, thread_(stack_base));
853 #ifdef ASSERT
854 address reentry = NULL;
855 NearLabel base_not_zero;
856 __ compareU64_and_branch(tmp1, (intptr_t)0L, Assembler::bcondNotEqual, base_not_zero);
857 reentry = __ stop_chain_static(reentry, "stack base is zero in generate_stack_overflow_check");
858 __ bind(base_not_zero);
859 #endif
860
861 // Get the stack size, and in debug, verify it is non-zero.
862 assert(sizeof(size_t) == sizeof(intptr_t), "wrong load size");
863 __ z_lg(tmp2, thread_(stack_size));
864 #ifdef ASSERT
865 NearLabel size_not_zero;
866 __ compareU64_and_branch(tmp2, (intptr_t)0L, Assembler::bcondNotEqual, size_not_zero);
867 reentry = __ stop_chain_static(reentry, "stack size is zero in generate_stack_overflow_check");
868 __ bind(size_not_zero);
869 #endif
870
871 // Compute the beginning of the protected zone minus the requested frame size.
872 __ z_sgr(tmp1, tmp2);
873 __ add2reg(tmp1, JavaThread::stack_guard_zone_size());
874
875 // Add in the size of the frame (which is the same as subtracting it from the
876 // SP, which would take another register.
877 __ z_agr(tmp1, frame_size);
878
879 // The frame is greater than one page in size, so check against
880 // the bottom of the stack.
881 __ compareU64_and_branch(Z_SP, tmp1, Assembler::bcondHigh, after_frame_check);
882
883 // The stack will overflow, throw an exception.
884
885 // Restore SP to sender's sp. This is necessary if the sender's frame is an
886 // extended compiled frame (see gen_c2i_adapter()) and safer anyway in case of
887 // JSR292 adaptations.
888 __ resize_frame_absolute(Z_R10, tmp1, true/*load_fp*/);
889
890 // Note also that the restored frame is not necessarily interpreted.
891 // Use the shared runtime version of the StackOverflowError.
892 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
893 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry());
894 __ load_absolute_address(tmp1, StubRoutines::throw_StackOverflowError_entry());
895 __ z_br(tmp1);
896
897 // If you get to here, then there is enough stack space.
898 __ bind(after_frame_check);
899
900 BLOCK_COMMENT("} counter_overflow");
901 }
902
903 // Allocate monitor and lock method (asm interpreter).
904 //
905 // Args:
906 // Z_locals: locals
907
908 void TemplateInterpreterGenerator::lock_method(void) {
909
910 BLOCK_COMMENT("lock_method {");
911
912 // Synchronize method.
913 const Register method = Z_tmp_2;
914 __ get_method(method);
915
916 #ifdef ASSERT
917 address reentry = NULL;
918 {
919 Label L;
920 __ testbit(method2_(method, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
921 __ z_btrue(L);
922 reentry = __ stop_chain_static(reentry, "method doesn't need synchronization");
923 __ bind(L);
924 }
925 #endif // ASSERT
926
927 // Get synchronization object.
928 const Register object = Z_tmp_2;
929
930 {
931 Label done;
932 Label static_method;
933
934 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT);
935 __ z_btrue(static_method);
936
937 // non-static method: Load receiver obj from stack.
938 __ mem2reg_opt(object, Address(Z_locals, Interpreter::local_offset_in_bytes(0)));
939 __ z_bru(done);
940
941 __ bind(static_method);
942
943 // Lock the java mirror.
944 __ load_mirror(object, method);
945 #ifdef ASSERT
946 {
947 NearLabel L;
948 __ compare64_and_branch(object, (intptr_t) 0, Assembler::bcondNotEqual, L);
949 reentry = __ stop_chain_static(reentry, "synchronization object is NULL");
950 __ bind(L);
951 }
952 #endif // ASSERT
953
954 __ bind(done);
955 }
956
957 __ add_monitor_to_stack(true, Z_ARG3, Z_ARG4, Z_ARG5); // Allocate monitor elem.
958 // Store object and lock it.
959 __ get_monitors(Z_tmp_1);
960 __ reg2mem_opt(object, Address(Z_tmp_1, BasicObjectLock::obj_offset_in_bytes()));
961 __ lock_object(Z_tmp_1, object);
962
963 BLOCK_COMMENT("} lock_method");
964 }
965
966 // Generate a fixed interpreter frame. This is identical setup for
967 // interpreted methods and for native methods hence the shared code.
968 //
969 // Registers alive
970 // Z_thread - JavaThread*
971 // Z_SP - old stack pointer
972 // Z_method - callee's method
973 // Z_esp - parameter list (slot 'above' last param)
974 // Z_R14 - return pc, to be stored in caller's frame
975 // Z_R10 - sender sp, note: Z_tmp_1 is Z_R10!
976 //
977 // Registers updated
978 // Z_SP - new stack pointer
979 // Z_esp - callee's operand stack pointer
980 // points to the slot above the value on top
981 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
982 // Z_bcp - the bytecode pointer
983 // Z_fp - the frame pointer, thereby killing Z_method
984 // Z_ARG2 - copy of Z_method
985 //
986 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
987
988 // stack layout
989 //
990 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (see note below)
991 // [F1's operand stack (unused)]
992 // [F1's outgoing Java arguments] <-- Z_esp
993 // [F1's operand stack (non args)]
994 // [monitors] (optional)
995 // [IJAVA_STATE]
996 //
997 // F2 [PARENT_IJAVA_FRAME_ABI]
998 // ...
999 //
1000 // 0x000
1001 //
1002 // Note: Z_R10, the sender sp, will be below Z_SP if F1 was extended by a c2i adapter.
1003
1004 //=============================================================================
1005 // Allocate space for locals other than the parameters, the
1006 // interpreter state, monitors, and the expression stack.
1007
1008 const Register local_count = Z_ARG5;
1009 const Register fp = Z_tmp_2;
1010
1011 BLOCK_COMMENT("generate_fixed_frame {");
1012
1013 {
1014 // local registers
1015 const Register top_frame_size = Z_ARG2;
1016 const Register sp_after_resize = Z_ARG3;
1017 const Register max_stack = Z_ARG4;
1018
1019 // local_count = method->constMethod->max_locals();
1020 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1021 __ z_llgh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset()));
1022
1023 if (native_call) {
1024 // If we're calling a native method, we replace max_stack (which is
1025 // zero) with space for the worst-case signature handler varargs
1026 // vector, which is:
1027 // max_stack = max(Argument::n_register_parameters, parameter_count+2);
1028 //
1029 // We add two slots to the parameter_count, one for the jni
1030 // environment and one for a possible native mirror. We allocate
1031 // space for at least the number of ABI registers, even though
1032 // InterpreterRuntime::slow_signature_handler won't write more than
1033 // parameter_count+2 words when it creates the varargs vector at the
1034 // top of the stack. The generated slow signature handler will just
1035 // load trash into registers beyond the necessary number. We're
1036 // still going to cut the stack back by the ABI register parameter
1037 // count so as to get SP+16 pointing at the ABI outgoing parameter
1038 // area, so we need to allocate at least that much even though we're
1039 // going to throw it away.
1040 //
1041
1042 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1043 __ z_llgh(max_stack, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset()));
1044 __ add2reg(max_stack, 2);
1045
1046 NearLabel passing_args_on_stack;
1047
1048 // max_stack in bytes
1049 __ z_sllg(max_stack, max_stack, LogBytesPerWord);
1050
1051 int argument_registers_in_bytes = Argument::n_register_parameters << LogBytesPerWord;
1052 __ compare64_and_branch(max_stack, argument_registers_in_bytes, Assembler::bcondNotLow, passing_args_on_stack);
1053
1054 __ load_const_optimized(max_stack, argument_registers_in_bytes);
1055
1056 __ bind(passing_args_on_stack);
1057 } else {
1058 // !native_call
1059 __ z_lg(max_stack, method_(const));
1060
1061 // Calculate number of non-parameter locals (in slots):
1062 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1063 __ z_sh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset()));
1064
1065 // max_stack = method->max_stack();
1066 __ z_llgh(max_stack, Address(max_stack, ConstMethod::max_stack_offset()));
1067 // max_stack in bytes
1068 __ z_sllg(max_stack, max_stack, LogBytesPerWord);
1069 }
1070
1071 // Resize (i.e. normally shrink) the top frame F1 ...
1072 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10
1073 // F1's operand stack (free)
1074 // ...
1075 // F1's operand stack (free) <-- Z_esp
1076 // F1's outgoing Java arg m
1077 // ...
1078 // F1's outgoing Java arg 0
1079 // ...
1080 //
1081 // ... into a parent frame (Z_R10 holds F1's SP before any modification, see also above)
1082 //
1083 // +......................+
1084 // : : <-- Z_R10, saved below as F0's z_ijava_state.sender_sp
1085 // : :
1086 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_SP \
1087 // F0's non arg local | = delta
1088 // ... |
1089 // F0's non arg local <-- Z_esp /
1090 // F1's outgoing Java arg m
1091 // ...
1092 // F1's outgoing Java arg 0
1093 // ...
1094 //
1095 // then push the new top frame F0.
1096 //
1097 // F0 [TOP_IJAVA_FRAME_ABI] = frame::z_top_ijava_frame_abi_size \
1098 // [operand stack] = max_stack | = top_frame_size
1099 // [IJAVA_STATE] = frame::z_ijava_state_size /
1100
1101 // sp_after_resize = Z_esp - delta
1102 //
1103 // delta = PARENT_IJAVA_FRAME_ABI + (locals_count - params_count)
1104
1105 __ add2reg(sp_after_resize, (Interpreter::stackElementSize) - (frame::z_parent_ijava_frame_abi_size), Z_esp);
1106 __ z_sllg(Z_R0_scratch, local_count, LogBytesPerWord); // Params have already been subtracted from local_count.
1107 __ z_slgr(sp_after_resize, Z_R0_scratch);
1108
1109 // top_frame_size = TOP_IJAVA_FRAME_ABI + max_stack + size of interpreter state
1110 __ add2reg(top_frame_size,
1111 frame::z_top_ijava_frame_abi_size +
1112 frame::z_ijava_state_size +
1113 frame::interpreter_frame_monitor_size() * wordSize,
1114 max_stack);
1115
1116 // Check if there's room for the new frame...
1117 Register frame_size = max_stack; // Reuse the regiser for max_stack.
1118 __ z_lgr(frame_size, Z_SP);
1119 __ z_sgr(frame_size, sp_after_resize);
1120 __ z_agr(frame_size, top_frame_size);
1121 generate_stack_overflow_check(frame_size, fp/*tmp1*/);
1122
1123 DEBUG_ONLY(__ z_cg(Z_R14, _z_abi16(return_pc), Z_SP));
1124 __ asm_assert_eq("killed Z_R14", 0);
1125 __ resize_frame_absolute(sp_after_resize, fp, true);
1126 __ save_return_pc(Z_R14);
1127
1128 // ... and push the new frame F0.
1129 __ push_frame(top_frame_size, fp, true /*copy_sp*/, false);
1130 }
1131
1132 //=============================================================================
1133 // Initialize the new frame F0: initialize interpreter state.
1134
1135 {
1136 // locals
1137 const Register local_addr = Z_ARG4;
1138
1139 BLOCK_COMMENT("generate_fixed_frame: initialize interpreter state {");
1140
1141 #ifdef ASSERT
1142 // Set the magic number (using local_addr as tmp register).
1143 __ load_const_optimized(local_addr, frame::z_istate_magic_number);
1144 __ z_stg(local_addr, _z_ijava_state_neg(magic), fp);
1145 #endif
1146
1147 // Save sender SP from F1 (i.e. before it was potentially modified by an
1148 // adapter) into F0's interpreter state. We us it as well to revert
1149 // resizing the frame above.
1150 __ z_stg(Z_R10, _z_ijava_state_neg(sender_sp), fp);
1151
1152 // Load cp cache and save it at the and of this block.
1153 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1154 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstMethod::constants_offset()));
1155 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstantPool::cache_offset_in_bytes()));
1156
1157 // z_ijava_state->method = method;
1158 __ z_stg(Z_method, _z_ijava_state_neg(method), fp);
1159
1160 // Point locals at the first argument. Method's locals are the
1161 // parameters on top of caller's expression stack.
1162 // Tos points past last Java argument.
1163
1164 __ z_lg(Z_locals, Address(Z_method, Method::const_offset()));
1165 __ z_llgh(Z_locals /*parameter_count words*/,
1166 Address(Z_locals, ConstMethod::size_of_parameters_offset()));
1167 __ z_sllg(Z_locals /*parameter_count bytes*/, Z_locals /*parameter_count*/, LogBytesPerWord);
1168 __ z_agr(Z_locals, Z_esp);
1169 // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0)
1170 // z_ijava_state->locals = Z_esp + parameter_count bytes
1171 __ z_stg(Z_locals, _z_ijava_state_neg(locals), fp);
1172
1173 // z_ijava_state->oop_temp = NULL;
1174 __ store_const(Address(fp, oop_tmp_offset), 0);
1175
1176 // Initialize z_ijava_state->mdx.
1177 Register Rmdp = Z_bcp;
1178 // native_call: assert that mdo == NULL
1179 const bool check_for_mdo = !native_call DEBUG_ONLY(|| native_call);
1180 if (ProfileInterpreter && check_for_mdo) {
1181 #ifdef FAST_DISPATCH
1182 // FAST_DISPATCH and ProfileInterpreter are mutually exclusive since
1183 // they both use I2.
1184 assert(0, "FAST_DISPATCH and +ProfileInterpreter are mutually exclusive");
1185 #endif // FAST_DISPATCH
1186 Label get_continue;
1187
1188 __ load_and_test_long(Rmdp, method_(method_data));
1189 __ z_brz(get_continue);
1190 DEBUG_ONLY(if (native_call) __ stop("native methods don't have a mdo"));
1191 __ add2reg(Rmdp, in_bytes(MethodData::data_offset()));
1192 __ bind(get_continue);
1193 }
1194 __ z_stg(Rmdp, _z_ijava_state_neg(mdx), fp);
1195
1196 // Initialize z_ijava_state->bcp and Z_bcp.
1197 if (native_call) {
1198 __ clear_reg(Z_bcp); // Must initialize. Will get written into frame where GC reads it.
1199 } else {
1200 __ z_lg(Z_bcp, method_(const));
1201 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset()));
1202 }
1203 __ z_stg(Z_bcp, _z_ijava_state_neg(bcp), fp);
1204
1205 // no monitors and empty operand stack
1206 // => z_ijava_state->monitors points to the top slot in IJAVA_STATE.
1207 // => Z_ijava_state->esp points one slot above into the operand stack.
1208 // z_ijava_state->monitors = fp - frame::z_ijava_state_size - Interpreter::stackElementSize;
1209 // z_ijava_state->esp = Z_esp = z_ijava_state->monitors;
1210 __ add2reg(Z_esp, -frame::z_ijava_state_size, fp);
1211 __ z_stg(Z_esp, _z_ijava_state_neg(monitors), fp);
1212 __ add2reg(Z_esp, -Interpreter::stackElementSize);
1213 __ z_stg(Z_esp, _z_ijava_state_neg(esp), fp);
1214
1215 // z_ijava_state->cpoolCache = Z_R1_scratch (see load above);
1216 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(cpoolCache), fp);
1217
1218 // Get mirror and store it in the frame as GC root for this Method*.
1219 __ load_mirror(Z_R1_scratch, Z_method);
1220 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(mirror), fp);
1221
1222 BLOCK_COMMENT("} generate_fixed_frame: initialize interpreter state");
1223
1224 //=============================================================================
1225 if (!native_call) {
1226 // Fill locals with 0x0s.
1227 NearLabel locals_zeroed;
1228 NearLabel doXC;
1229
1230 // Local_count is already num_locals_slots - num_param_slots.
1231 __ compare64_and_branch(local_count, (intptr_t)0L, Assembler::bcondNotHigh, locals_zeroed);
1232
1233 // Advance local_addr to point behind locals (creates positive incr. in loop).
1234 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1235 __ z_llgh(Z_R0_scratch,
1236 Address(Z_R1_scratch, ConstMethod::size_of_locals_offset()));
1237 if (Z_R0_scratch == Z_R0) {
1238 __ z_aghi(Z_R0_scratch, -1);
1239 } else {
1240 __ add2reg(Z_R0_scratch, -1);
1241 }
1242 __ z_lgr(local_addr/*locals*/, Z_locals);
1243 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogBytesPerWord);
1244 __ z_sllg(local_count, local_count, LogBytesPerWord); // Local_count are non param locals.
1245 __ z_sgr(local_addr, Z_R0_scratch);
1246
1247 if (VM_Version::has_Prefetch()) {
1248 __ z_pfd(0x02, 0, Z_R0, local_addr);
1249 __ z_pfd(0x02, 256, Z_R0, local_addr);
1250 }
1251
1252 // Can't optimise for Z10 using "compare and branch" (immediate value is too big).
1253 __ z_cghi(local_count, 256);
1254 __ z_brnh(doXC);
1255
1256 // MVCLE: Initialize if quite a lot locals.
1257 // __ bind(doMVCLE);
1258 __ z_lgr(Z_R0_scratch, local_addr);
1259 __ z_lgr(Z_R1_scratch, local_count);
1260 __ clear_reg(Z_ARG2); // Src len of MVCLE is zero.
1261
1262 __ MacroAssembler::move_long_ext(Z_R0_scratch, Z_ARG1, 0);
1263 __ z_bru(locals_zeroed);
1264
1265 Label XC_template;
1266 __ bind(XC_template);
1267 __ z_xc(0, 0, local_addr, 0, local_addr);
1268
1269 __ bind(doXC);
1270 __ z_bctgr(local_count, Z_R0); // Get #bytes-1 for EXECUTE.
1271 if (VM_Version::has_ExecuteExtensions()) {
1272 __ z_exrl(local_count, XC_template); // Execute XC with variable length.
1273 } else {
1274 __ z_larl(Z_R1_scratch, XC_template);
1275 __ z_ex(local_count, 0, Z_R0, Z_R1_scratch); // Execute XC with variable length.
1276 }
1277
1278 __ bind(locals_zeroed);
1279 }
1280
1281 }
1282 // Finally set the frame pointer, destroying Z_method.
1283 assert(Z_fp == Z_method, "maybe set Z_fp earlier if other register than Z_method");
1284 // Oprofile analysis suggests to keep a copy in a register to be used by
1285 // generate_counter_incr().
1286 __ z_lgr(Z_ARG2, Z_method);
1287 __ z_lgr(Z_fp, fp);
1288
1289 BLOCK_COMMENT("} generate_fixed_frame");
1290 }
1291
1292 // Various method entries
1293
1294 // Math function, frame manager must set up an interpreter state, etc.
1295 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
1296
1297 // Decide what to do: Use same platform specific instructions and runtime calls as compilers.
1298 bool use_instruction = false;
1299 address runtime_entry = NULL;
1300 int num_args = 1;
1301 bool double_precision = true;
1302
1303 // s390 specific:
1304 switch (kind) {
1305 case Interpreter::java_lang_math_sqrt:
1306 case Interpreter::java_lang_math_abs: use_instruction = true; break;
1307 case Interpreter::java_lang_math_fmaF:
1308 case Interpreter::java_lang_math_fmaD: use_instruction = UseFMA; break;
1309 default: break; // Fall back to runtime call.
1310 }
1311
1312 switch (kind) {
1313 case Interpreter::java_lang_math_sin : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); break;
1314 case Interpreter::java_lang_math_cos : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); break;
1315 case Interpreter::java_lang_math_tan : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); break;
1316 case Interpreter::java_lang_math_abs : /* run interpreted */ break;
1317 case Interpreter::java_lang_math_sqrt : /* runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsqrt); not available */ break;
1318 case Interpreter::java_lang_math_log : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); break;
1319 case Interpreter::java_lang_math_log10: runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); break;
1320 case Interpreter::java_lang_math_pow : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); num_args = 2; break;
1321 case Interpreter::java_lang_math_exp : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); break;
1322 case Interpreter::java_lang_math_fmaF : /* run interpreted */ num_args = 3; double_precision = false; break;
1323 case Interpreter::java_lang_math_fmaD : /* run interpreted */ num_args = 3; break;
1324 default: ShouldNotReachHere();
1325 }
1326
1327 // Use normal entry if neither instruction nor runtime call is used.
1328 if (!use_instruction && runtime_entry == NULL) return NULL;
1329
1330 address entry = __ pc();
1331
1332 if (use_instruction) {
1333 switch (kind) {
1334 case Interpreter::java_lang_math_sqrt:
1335 // Can use memory operand directly.
1336 __ z_sqdb(Z_FRET, Interpreter::stackElementSize, Z_esp);
1337 break;
1338 case Interpreter::java_lang_math_abs:
1339 // Load operand from stack.
1340 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize));
1341 __ z_lpdbr(Z_FRET);
1342 break;
1343 case Interpreter::java_lang_math_fmaF:
1344 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3
1345 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); // arg1
1346 __ z_maeb(Z_FRET, Z_FARG2, Address(Z_esp, 2 * Interpreter::stackElementSize));
1347 break;
1348 case Interpreter::java_lang_math_fmaD:
1349 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3
1350 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 5 * Interpreter::stackElementSize)); // arg1
1351 __ z_madb(Z_FRET, Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize));
1352 break;
1353 default: ShouldNotReachHere();
1354 }
1355 } else {
1356 // Load arguments
1357 assert(num_args <= 4, "passed in registers");
1358 if (double_precision) {
1359 int offset = (2 * num_args - 1) * Interpreter::stackElementSize;
1360 for (int i = 0; i < num_args; ++i) {
1361 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset));
1362 offset -= 2 * Interpreter::stackElementSize;
1363 }
1364 } else {
1365 int offset = num_args * Interpreter::stackElementSize;
1366 for (int i = 0; i < num_args; ++i) {
1367 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset));
1368 offset -= Interpreter::stackElementSize;
1369 }
1370 }
1371 // Call runtime
1372 __ save_return_pc(); // Save Z_R14.
1373 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14.
1374
1375 __ call_VM_leaf(runtime_entry);
1376
1377 __ pop_frame();
1378 __ restore_return_pc(); // Restore Z_R14.
1379 }
1380
1381 // Pop c2i arguments (if any) off when we return.
1382 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
1383
1384 __ z_br(Z_R14);
1385
1386 return entry;
1387 }
1388
1389 // Interpreter stub for calling a native method. (asm interpreter).
1390 // This sets up a somewhat different looking stack for calling the
1391 // native method than the typical interpreter frame setup.
1392 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
1393 // Determine code generation flags.
1394 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1395
1396 // Interpreter entry for ordinary Java methods.
1397 //
1398 // Registers alive
1399 // Z_SP - stack pointer
1400 // Z_thread - JavaThread*
1401 // Z_method - callee's method (method to be invoked)
1402 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg.
1403 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter
1404 // and as well by generate_fixed_frame below)
1405 // Z_R14 - return address to caller (call_stub or c2i_adapter)
1406 //
1407 // Registers updated
1408 // Z_SP - stack pointer
1409 // Z_fp - callee's framepointer
1410 // Z_esp - callee's operand stack pointer
1411 // points to the slot above the value on top
1412 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
1413 // Z_tos - integer result, if any
1414 // z_ftos - floating point result, if any
1415 //
1416 // Stack layout at this point:
1417 //
1418 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if
1419 // frame was extended by c2i adapter)
1420 // [outgoing Java arguments] <-- Z_esp
1421 // ...
1422 // PARENT [PARENT_IJAVA_FRAME_ABI]
1423 // ...
1424 //
1425
1426 address entry_point = __ pc();
1427
1428 // Make sure registers are different!
1429 assert_different_registers(Z_thread, Z_method, Z_esp);
1430
1431 BLOCK_COMMENT("native_entry {");
1432
1433 // Make sure method is native and not abstract.
1434 #ifdef ASSERT
1435 address reentry = NULL;
1436 { Label L;
1437 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT);
1438 __ z_btrue(L);
1439 reentry = __ stop_chain_static(reentry, "tried to execute non-native method as native");
1440 __ bind(L);
1441 }
1442 { Label L;
1443 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT);
1444 __ z_bfalse(L);
1445 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract");
1446 __ bind(L);
1447 }
1448 #endif // ASSERT
1449
1450 #ifdef ASSERT
1451 // Save the return PC into the callers frame for assertion in generate_fixed_frame.
1452 __ save_return_pc(Z_R14);
1453 #endif
1454
1455 // Generate the code to allocate the interpreter stack frame.
1456 generate_fixed_frame(true);
1457
1458 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset());
1459 // Since at this point in the method invocation the exception handler
1460 // would try to exit the monitor of synchronized methods which hasn't
1461 // been entered yet, we set the thread local variable
1462 // _do_not_unlock_if_synchronized to true. If any exception was thrown by
1463 // runtime, exception handling i.e. unlock_if_synchronized_method will
1464 // check this thread local flag.
1465 __ z_mvi(do_not_unlock_if_synchronized, true);
1466
1467 // Increment invocation count and check for overflow.
1468 NearLabel invocation_counter_overflow;
1469 if (inc_counter) {
1470 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1471 }
1472
1473 Label continue_after_compile;
1474 __ bind(continue_after_compile);
1475
1476 bang_stack_shadow_pages(true);
1477
1478 // Reset the _do_not_unlock_if_synchronized flag.
1479 __ z_mvi(do_not_unlock_if_synchronized, false);
1480
1481 // Check for synchronized methods.
1482 // This mst happen AFTER invocation_counter check and stack overflow check,
1483 // so method is not locked if overflows.
1484 if (synchronized) {
1485 lock_method();
1486 } else {
1487 // No synchronization necessary.
1488 #ifdef ASSERT
1489 { Label L;
1490 __ get_method(Z_R1_scratch);
1491 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
1492 __ z_bfalse(L);
1493 reentry = __ stop_chain_static(reentry, "method needs synchronization");
1494 __ bind(L);
1495 }
1496 #endif // ASSERT
1497 }
1498
1499 // start execution
1500
1501 // jvmti support
1502 __ notify_method_entry();
1503
1504 //=============================================================================
1505 // Get and call the signature handler.
1506 const Register Rmethod = Z_tmp_2;
1507 const Register signature_handler_entry = Z_tmp_1;
1508 const Register Rresult_handler = Z_tmp_3;
1509 Label call_signature_handler;
1510
1511 assert_different_registers(Z_fp, Rmethod, signature_handler_entry, Rresult_handler);
1512 assert(Rresult_handler->is_nonvolatile(), "Rresult_handler must be in a non-volatile register");
1513
1514 // Reload method.
1515 __ get_method(Rmethod);
1516
1517 // Check for signature handler.
1518 __ load_and_test_long(signature_handler_entry, method2_(Rmethod, signature_handler));
1519 __ z_brne(call_signature_handler);
1520
1521 // Method has never been called. Either generate a specialized
1522 // handler or point to the slow one.
1523 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call),
1524 Rmethod);
1525
1526 // Reload method.
1527 __ get_method(Rmethod);
1528
1529 // Reload signature handler, it must have been created/assigned in the meantime.
1530 __ z_lg(signature_handler_entry, method2_(Rmethod, signature_handler));
1531
1532 __ bind(call_signature_handler);
1533
1534 // We have a TOP_IJAVA_FRAME here, which belongs to us.
1535 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1/*tmp*/);
1536
1537 // Call signature handler and pass locals address in Z_ARG1.
1538 __ z_lgr(Z_ARG1, Z_locals);
1539 __ call_stub(signature_handler_entry);
1540 // Save result handler returned by signature handler.
1541 __ z_lgr(Rresult_handler, Z_RET);
1542
1543 // Reload method (the slow signature handler may block for GC).
1544 __ get_method(Rmethod);
1545
1546 // Pass mirror handle if static call.
1547 {
1548 Label method_is_not_static;
1549 __ testbit(method2_(Rmethod, access_flags), JVM_ACC_STATIC_BIT);
1550 __ z_bfalse(method_is_not_static);
1551 // Get mirror.
1552 __ load_mirror(Z_R1, Rmethod);
1553 // z_ijava_state.oop_temp = pool_holder->klass_part()->java_mirror();
1554 __ z_stg(Z_R1, oop_tmp_offset, Z_fp);
1555 // Pass handle to mirror as 2nd argument to JNI method.
1556 __ add2reg(Z_ARG2, oop_tmp_offset, Z_fp);
1557 __ bind(method_is_not_static);
1558 }
1559
1560 // Pass JNIEnv address as first parameter.
1561 __ add2reg(Z_ARG1, in_bytes(JavaThread::jni_environment_offset()), Z_thread);
1562
1563 // Note: last java frame has been set above already. The pc from there
1564 // is precise enough.
1565
1566 // Get native function entry point before we change the thread state.
1567 __ z_lg(Z_R1/*native_method_entry*/, method2_(Rmethod, native_function));
1568
1569 //=============================================================================
1570 // Transition from _thread_in_Java to _thread_in_native. As soon as
1571 // we make this change the safepoint code needs to be certain that
1572 // the last Java frame we established is good. The pc in that frame
1573 // just need to be near here not an actual return address.
1574 #ifdef ASSERT
1575 {
1576 NearLabel L;
1577 __ mem2reg_opt(Z_R14, Address(Z_thread, JavaThread::thread_state_offset()), false /*32 bits*/);
1578 __ compareU32_and_branch(Z_R14, _thread_in_Java, Assembler::bcondEqual, L);
1579 reentry = __ stop_chain_static(reentry, "Wrong thread state in native stub");
1580 __ bind(L);
1581 }
1582 #endif
1583
1584 // Memory ordering: Z does not reorder store/load with subsequent load. That's strong enough.
1585 __ set_thread_state(_thread_in_native);
1586
1587 //=============================================================================
1588 // Call the native method. Argument registers must not have been
1589 // overwritten since "__ call_stub(signature_handler);" (except for
1590 // ARG1 and ARG2 for static methods).
1591
1592 __ call_c(Z_R1/*native_method_entry*/);
1593
1594 // NOTE: frame::interpreter_frame_result() depends on these stores.
1595 __ z_stg(Z_RET, _z_ijava_state_neg(lresult), Z_fp);
1596 __ freg2mem_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult)));
1597 const Register Rlresult = signature_handler_entry;
1598 assert(Rlresult->is_nonvolatile(), "Rlresult must be in a non-volatile register");
1599 __ z_lgr(Rlresult, Z_RET);
1600
1601 // Z_method may no longer be valid, because of GC.
1602
1603 // Block, if necessary, before resuming in _thread_in_Java state.
1604 // In order for GC to work, don't clear the last_Java_sp until after
1605 // blocking.
1606
1607 //=============================================================================
1608 // Switch thread to "native transition" state before reading the
1609 // synchronization state. This additional state is necessary
1610 // because reading and testing the synchronization state is not
1611 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A,
1612 // in _thread_in_native state, loads _not_synchronized and is
1613 // preempted. VM thread changes sync state to synchronizing and
1614 // suspends threads for GC. Thread A is resumed to finish this
1615 // native method, but doesn't block here since it didn't see any
1616 // synchronization is progress, and escapes.
1617
1618 __ set_thread_state(_thread_in_native_trans);
1619 if (UseMembar) {
1620 __ z_fence();
1621 } else {
1622 // Write serialization page so VM thread can do a pseudo remote
1623 // membar. We use the current thread pointer to calculate a thread
1624 // specific offset to write to within the page. This minimizes bus
1625 // traffic due to cache line collision.
1626 __ serialize_memory(Z_thread, Z_R1, Z_R0);
1627 }
1628 // Now before we return to java we must look for a current safepoint
1629 // (a new safepoint can not start since we entered native_trans).
1630 // We must check here because a current safepoint could be modifying
1631 // the callers registers right this moment.
1632
1633 // Check for safepoint operation in progress and/or pending suspend requests.
1634 {
1635 Label Continue, do_safepoint;
1636 __ generate_safepoint_check(do_safepoint, Z_R1, true);
1637 // Check for suspend.
1638 __ load_and_test_int(Z_R0/*suspend_flags*/, thread_(suspend_flags));
1639 __ z_bre(Continue); // 0 -> no flag set -> not suspended
1640 __ bind(do_safepoint);
1641 __ z_lgr(Z_ARG1, Z_thread);
1642 __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
1643 __ bind(Continue);
1644 }
1645
1646 //=============================================================================
1647 // Back in Interpreter Frame.
1648
1649 // We are in thread_in_native_trans here and back in the normal
1650 // interpreter frame. We don't have to do anything special about
1651 // safepoints and we can switch to Java mode anytime we are ready.
1652
1653 // Note: frame::interpreter_frame_result has a dependency on how the
1654 // method result is saved across the call to post_method_exit. For
1655 // native methods it assumes that the non-FPU/non-void result is
1656 // saved in z_ijava_state.lresult and a FPU result in z_ijava_state.fresult. If
1657 // this changes then the interpreter_frame_result implementation
1658 // will need to be updated too.
1659
1660 //=============================================================================
1661 // Back in Java.
1662
1663 // Memory ordering: Z does not reorder store/load with subsequent
1664 // load. That's strong enough.
1665 __ set_thread_state(_thread_in_Java);
1666
1667 __ reset_last_Java_frame();
1668
1669 // We reset the JNI handle block only after unboxing the result; see below.
1670
1671 // The method register is junk from after the thread_in_native transition
1672 // until here. Also can't call_VM until the bcp has been
1673 // restored. Need bcp for throwing exception below so get it now.
1674 __ get_method(Rmethod);
1675
1676 // Restore Z_bcp to have legal interpreter frame,
1677 // i.e., bci == 0 <=> Z_bcp == code_base().
1678 __ z_lg(Z_bcp, Address(Rmethod, Method::const_offset())); // get constMethod
1679 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); // get codebase
1680
1681 if (CheckJNICalls) {
1682 // clear_pending_jni_exception_check
1683 __ clear_mem(Address(Z_thread, JavaThread::pending_jni_exception_check_fn_offset()), sizeof(oop));
1684 }
1685
1686 // Check if the native method returns an oop, and if so, move it
1687 // from the jni handle to z_ijava_state.oop_temp. This is
1688 // necessary, because we reset the jni handle block below.
1689 // NOTE: frame::interpreter_frame_result() depends on this, too.
1690 { NearLabel no_oop_result, store_oop_result;
1691 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT));
1692 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_result);
1693 __ compareU64_and_branch(Rlresult, (intptr_t)0L, Assembler::bcondEqual, store_oop_result);
1694 __ z_lg(Rlresult, 0, Rlresult); // unbox
1695 __ bind(store_oop_result);
1696 __ z_stg(Rlresult, oop_tmp_offset, Z_fp);
1697 __ verify_oop(Rlresult);
1698 __ bind(no_oop_result);
1699 }
1700
1701 // Reset handle block.
1702 __ z_lg(Z_R1/*active_handles*/, thread_(active_handles));
1703 __ clear_mem(Address(Z_R1, JNIHandleBlock::top_offset_in_bytes()), 4);
1704
1705 // Bandle exceptions (exception handling will handle unlocking!).
1706 {
1707 Label L;
1708 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception));
1709 __ z_bre(L);
1710 __ MacroAssembler::call_VM(noreg,
1711 CAST_FROM_FN_PTR(address,
1712 InterpreterRuntime::throw_pending_exception));
1713 __ should_not_reach_here();
1714 __ bind(L);
1715 }
1716
1717 if (synchronized) {
1718 Register Rfirst_monitor = Z_ARG2;
1719 __ add2reg(Rfirst_monitor, -(frame::z_ijava_state_size + (int)sizeof(BasicObjectLock)), Z_fp);
1720 #ifdef ASSERT
1721 NearLabel ok;
1722 __ z_lg(Z_R1, _z_ijava_state_neg(monitors), Z_fp);
1723 __ compareU64_and_branch(Rfirst_monitor, Z_R1, Assembler::bcondEqual, ok);
1724 reentry = __ stop_chain_static(reentry, "native_entry:unlock: inconsistent z_ijava_state.monitors");
1725 __ bind(ok);
1726 #endif
1727 __ unlock_object(Rfirst_monitor);
1728 }
1729
1730 // JVMTI support. Result has already been saved above to the frame.
1731 __ notify_method_exit(true/*native_method*/, ilgl, InterpreterMacroAssembler::NotifyJVMTI);
1732
1733 // Move native method result back into proper registers and return.
1734 // C++ interpreter does not use result handler. So do we need to here? TODO(ZASM): check if correct.
1735 { NearLabel no_oop_or_null;
1736 __ mem2freg_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult)));
1737 __ load_and_test_long(Z_RET, Address(Z_fp, _z_ijava_state_neg(lresult)));
1738 __ z_bre(no_oop_or_null); // No unboxing if the result is NULL.
1739 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT));
1740 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_or_null);
1741 __ z_lg(Z_RET, oop_tmp_offset, Z_fp);
1742 __ verify_oop(Z_RET);
1743 __ bind(no_oop_or_null);
1744 }
1745
1746 // Pop the native method's interpreter frame.
1747 __ pop_interpreter_frame(Z_R14 /*return_pc*/, Z_ARG2/*tmp1*/, Z_ARG3/*tmp2*/);
1748
1749 // Return to caller.
1750 __ z_br(Z_R14);
1751
1752 if (inc_counter) {
1753 // Handle overflow of counter and compile method.
1754 __ bind(invocation_counter_overflow);
1755 generate_counter_overflow(continue_after_compile);
1756 }
1757
1758 BLOCK_COMMENT("} native_entry");
1759
1760 return entry_point;
1761 }
1762
1763 //
1764 // Generic interpreted method entry to template interpreter.
1765 //
1766 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1767 address entry_point = __ pc();
1768
1769 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1770
1771 // Interpreter entry for ordinary Java methods.
1772 //
1773 // Registers alive
1774 // Z_SP - stack pointer
1775 // Z_thread - JavaThread*
1776 // Z_method - callee's method (method to be invoked)
1777 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg.
1778 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter
1779 // and as well by generate_fixed_frame below)
1780 // Z_R14 - return address to caller (call_stub or c2i_adapter)
1781 //
1782 // Registers updated
1783 // Z_SP - stack pointer
1784 // Z_fp - callee's framepointer
1785 // Z_esp - callee's operand stack pointer
1786 // points to the slot above the value on top
1787 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
1788 // Z_tos - integer result, if any
1789 // z_ftos - floating point result, if any
1790 //
1791 //
1792 // stack layout at this point:
1793 //
1794 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if
1795 // frame was extended by c2i adapter)
1796 // [outgoing Java arguments] <-- Z_esp
1797 // ...
1798 // PARENT [PARENT_IJAVA_FRAME_ABI]
1799 // ...
1800 //
1801 // stack layout before dispatching the first bytecode:
1802 //
1803 // F0 [TOP_IJAVA_FRAME_ABI] <-- Z_SP
1804 // [operand stack] <-- Z_esp
1805 // monitor (optional, can grow)
1806 // [IJAVA_STATE]
1807 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_fp (== *Z_SP)
1808 // [F0's locals] <-- Z_locals
1809 // [F1's operand stack]
1810 // [F1's monitors] (optional)
1811 // [IJAVA_STATE]
1812
1813 // Make sure registers are different!
1814 assert_different_registers(Z_thread, Z_method, Z_esp);
1815
1816 BLOCK_COMMENT("normal_entry {");
1817
1818 // Make sure method is not native and not abstract.
1819 // Rethink these assertions - they can be simplified and shared.
1820 #ifdef ASSERT
1821 address reentry = NULL;
1822 { Label L;
1823 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT);
1824 __ z_bfalse(L);
1825 reentry = __ stop_chain_static(reentry, "tried to execute native method as non-native");
1826 __ bind(L);
1827 }
1828 { Label L;
1829 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT);
1830 __ z_bfalse(L);
1831 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract");
1832 __ bind(L);
1833 }
1834 #endif // ASSERT
1835
1836 #ifdef ASSERT
1837 // Save the return PC into the callers frame for assertion in generate_fixed_frame.
1838 __ save_return_pc(Z_R14);
1839 #endif
1840
1841 // Generate the code to allocate the interpreter stack frame.
1842 generate_fixed_frame(false);
1843
1844 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset());
1845 // Since at this point in the method invocation the exception handler
1846 // would try to exit the monitor of synchronized methods which hasn't
1847 // been entered yet, we set the thread local variable
1848 // _do_not_unlock_if_synchronized to true. If any exception was thrown by
1849 // runtime, exception handling i.e. unlock_if_synchronized_method will
1850 // check this thread local flag.
1851 __ z_mvi(do_not_unlock_if_synchronized, true);
1852
1853 __ profile_parameters_type(Z_tmp_2, Z_ARG3, Z_ARG4);
1854
1855 // Increment invocation counter and check for overflow.
1856 //
1857 // Note: checking for negative value instead of overflow so we have a 'sticky'
1858 // overflow test (may be of importance as soon as we have true MT/MP).
1859 NearLabel invocation_counter_overflow;
1860 NearLabel profile_method;
1861 NearLabel profile_method_continue;
1862 NearLabel Lcontinue;
1863 if (inc_counter) {
1864 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1865 if (ProfileInterpreter) {
1866 __ bind(profile_method_continue);
1867 }
1868 }
1869 __ bind(Lcontinue);
1870
1871 bang_stack_shadow_pages(false);
1872
1873 // Reset the _do_not_unlock_if_synchronized flag.
1874 __ z_mvi(do_not_unlock_if_synchronized, false);
1875
1876 // Check for synchronized methods.
1877 // Must happen AFTER invocation_counter check and stack overflow check,
1878 // so method is not locked if overflows.
1879 if (synchronized) {
1880 // Allocate monitor and lock method.
1881 lock_method();
1882 } else {
1883 #ifdef ASSERT
1884 { Label L;
1885 __ get_method(Z_R1_scratch);
1886 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
1887 __ z_bfalse(L);
1888 reentry = __ stop_chain_static(reentry, "method needs synchronization");
1889 __ bind(L);
1890 }
1891 #endif // ASSERT
1892 }
1893
1894 // start execution
1895
1896 #ifdef ASSERT
1897 __ verify_esp(Z_esp, Z_R1_scratch);
1898
1899 __ verify_thread();
1900 #endif
1901
1902 // jvmti support
1903 __ notify_method_entry();
1904
1905 // Start executing instructions.
1906 __ dispatch_next(vtos);
1907 // Dispatch_next does not return.
1908 DEBUG_ONLY(__ should_not_reach_here());
1909
1910 // Invocation counter overflow.
1911 if (inc_counter) {
1912 if (ProfileInterpreter) {
1913 // We have decided to profile this method in the interpreter.
1914 __ bind(profile_method);
1915
1916 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1917 __ set_method_data_pointer_for_bcp();
1918 __ z_bru(profile_method_continue);
1919 }
1920
1921 // Handle invocation counter overflow.
1922 __ bind(invocation_counter_overflow);
1923 generate_counter_overflow(Lcontinue);
1924 }
1925
1926 BLOCK_COMMENT("} normal_entry");
1927
1928 return entry_point;
1929 }
1930
1931 // Method entry for static native methods:
1932 // int java.util.zip.CRC32.update(int crc, int b)
1933 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
1934
1935 if (UseCRC32Intrinsics) {
1936 uint64_t entry_off = __ offset();
1937 Label slow_path;
1938
1939 // If we need a safepoint check, generate full interpreter entry.
1940 __ generate_safepoint_check(slow_path, Z_R1, false);
1941
1942 BLOCK_COMMENT("CRC32_update {");
1943
1944 // We don't generate local frame and don't align stack because
1945 // we not even call stub code (we generate the code inline)
1946 // and there is no safepoint on this path.
1947
1948 // Load java parameters.
1949 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
1950 const Register argP = Z_esp;
1951 const Register crc = Z_ARG1; // crc value
1952 const Register data = Z_ARG2; // address of java byte value (kernel_crc32 needs address)
1953 const Register dataLen = Z_ARG3; // source data len (1 byte). Not used because calling the single-byte emitter.
1954 const Register table = Z_ARG4; // address of crc32 table
1955
1956 // Arguments are reversed on java expression stack.
1957 __ z_la(data, 3+1*wordSize, argP); // byte value (stack address).
1958 // Being passed as an int, the single byte is at offset +3.
1959 __ z_llgf(crc, 2 * wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register.
1960
1961 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table);
1962 __ kernel_crc32_singleByte(crc, data, dataLen, table, Z_R1);
1963
1964 // Restore caller sp for c2i case.
1965 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
1966
1967 __ z_br(Z_R14);
1968
1969 BLOCK_COMMENT("} CRC32_update");
1970
1971 // Use a previously generated vanilla native entry as the slow path.
1972 BIND(slow_path);
1973 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1);
1974 return __ addr_at(entry_off);
1975 }
1976
1977 return NULL;
1978 }
1979
1980
1981 // Method entry for static native methods:
1982 // int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
1983 // int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
1984 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
1985
1986 if (UseCRC32Intrinsics) {
1987 uint64_t entry_off = __ offset();
1988 Label slow_path;
1989
1990 // If we need a safepoint check, generate full interpreter entry.
1991 __ generate_safepoint_check(slow_path, Z_R1, false);
1992
1993 // We don't generate local frame and don't align stack because
1994 // we call stub code and there is no safepoint on this path.
1995
1996 // Load parameters.
1997 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
1998 const Register argP = Z_esp;
1999 const Register crc = Z_ARG1; // crc value
2000 const Register data = Z_ARG2; // address of java byte array
2001 const Register dataLen = Z_ARG3; // source data len
2002 const Register table = Z_ARG4; // address of crc32 table
2003 const Register t0 = Z_R10; // work reg for kernel* emitters
2004 const Register t1 = Z_R11; // work reg for kernel* emitters
2005 const Register t2 = Z_R12; // work reg for kernel* emitters
2006 const Register t3 = Z_R13; // work reg for kernel* emitters
2007
2008 // Arguments are reversed on java expression stack.
2009 // Calculate address of start element.
2010 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { // Used for "updateByteBuffer direct".
2011 // crc @ (SP + 5W) (32bit)
2012 // buf @ (SP + 3W) (64bit ptr to long array)
2013 // off @ (SP + 2W) (32bit)
2014 // dataLen @ (SP + 1W) (32bit)
2015 // data = buf + off
2016 BLOCK_COMMENT("CRC32_updateByteBuffer {");
2017 __ z_llgf(crc, 5*wordSize, argP); // current crc state
2018 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2019 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2020 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process
2021 } else { // Used for "updateBytes update".
2022 // crc @ (SP + 4W) (32bit)
2023 // buf @ (SP + 3W) (64bit ptr to byte array)
2024 // off @ (SP + 2W) (32bit)
2025 // dataLen @ (SP + 1W) (32bit)
2026 // data = buf + off + base_offset
2027 BLOCK_COMMENT("CRC32_updateBytes {");
2028 __ z_llgf(crc, 4*wordSize, argP); // current crc state
2029 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2030 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2031 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process
2032 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
2033 }
2034
2035 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table);
2036
2037 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers.
2038 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers.
2039 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3);
2040 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack.
2041
2042 // Restore caller sp for c2i case.
2043 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
2044
2045 __ z_br(Z_R14);
2046
2047 BLOCK_COMMENT("} CRC32_update{Bytes|ByteBuffer}");
2048
2049 // Use a previously generated vanilla native entry as the slow path.
2050 BIND(slow_path);
2051 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1);
2052 return __ addr_at(entry_off);
2053 }
2054
2055 return NULL;
2056 }
2057
2058 // Not supported
2059 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
2060 return NULL;
2061 }
2062
2063 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
2064 // Quick & dirty stack overflow checking: bang the stack & handle trap.
2065 // Note that we do the banging after the frame is setup, since the exception
2066 // handling code expects to find a valid interpreter frame on the stack.
2067 // Doing the banging earlier fails if the caller frame is not an interpreter
2068 // frame.
2069 // (Also, the exception throwing code expects to unlock any synchronized
2070 // method receiver, so do the banging after locking the receiver.)
2071
2072 // Bang each page in the shadow zone. We can't assume it's been done for
2073 // an interpreter frame with greater than a page of locals, so each page
2074 // needs to be checked. Only true for non-native. For native, we only bang the last page.
2075 if (UseStackBanging) {
2076 const int page_size = os::vm_page_size();
2077 const int n_shadow_pages = (int)(JavaThread::stack_shadow_zone_size()/page_size);
2078 const int start_page_num = native_call ? n_shadow_pages : 1;
2079 for (int pages = start_page_num; pages <= n_shadow_pages; pages++) {
2080 __ bang_stack_with_offset(pages*page_size);
2081 }
2082 }
2083 }
2084
2085 //-----------------------------------------------------------------------------
2086 // Exceptions
2087
2088 void TemplateInterpreterGenerator::generate_throw_exception() {
2089
2090 BLOCK_COMMENT("throw_exception {");
2091
2092 // Entry point in previous activation (i.e., if the caller was interpreted).
2093 Interpreter::_rethrow_exception_entry = __ pc();
2094 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Frame accessors use Z_fp.
2095 // Z_ARG1 (==Z_tos): exception
2096 // Z_ARG2 : Return address/pc that threw exception.
2097 __ restore_bcp(); // R13 points to call/send.
2098 __ restore_locals();
2099
2100 // Fallthrough, no need to restore Z_esp.
2101
2102 // Entry point for exceptions thrown within interpreter code.
2103 Interpreter::_throw_exception_entry = __ pc();
2104 // Expression stack is undefined here.
2105 // Z_ARG1 (==Z_tos): exception
2106 // Z_bcp: exception bcp
2107 __ verify_oop(Z_ARG1);
2108 __ z_lgr(Z_ARG2, Z_ARG1);
2109
2110 // Expression stack must be empty before entering the VM in case of
2111 // an exception.
2112 __ empty_expression_stack();
2113 // Find exception handler address and preserve exception oop.
2114 const Register Rpreserved_exc_oop = Z_tmp_1;
2115 __ call_VM(Rpreserved_exc_oop,
2116 CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception),
2117 Z_ARG2);
2118 // Z_RET: exception handler entry point
2119 // Z_bcp: bcp for exception handler
2120 __ push_ptr(Rpreserved_exc_oop); // Push exception which is now the only value on the stack.
2121 __ z_br(Z_RET); // Jump to exception handler (may be _remove_activation_entry!).
2122
2123 // If the exception is not handled in the current frame the frame is
2124 // removed and the exception is rethrown (i.e. exception
2125 // continuation is _rethrow_exception).
2126 //
2127 // Note: At this point the bci is still the bci for the instruction
2128 // which caused the exception and the expression stack is
2129 // empty. Thus, for any VM calls at this point, GC will find a legal
2130 // oop map (with empty expression stack).
2131
2132 //
2133 // JVMTI PopFrame support
2134 //
2135
2136 Interpreter::_remove_activation_preserving_args_entry = __ pc();
2137 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP);
2138 __ empty_expression_stack();
2139 // Set the popframe_processing bit in pending_popframe_condition
2140 // indicating that we are currently handling popframe, so that
2141 // call_VMs that may happen later do not trigger new popframe
2142 // handling cycles.
2143 __ load_sized_value(Z_tmp_1, Address(Z_thread, JavaThread::popframe_condition_offset()), 4, false /*signed*/);
2144 __ z_oill(Z_tmp_1, JavaThread::popframe_processing_bit);
2145 __ z_sty(Z_tmp_1, thread_(popframe_condition));
2146
2147 {
2148 // Check to see whether we are returning to a deoptimized frame.
2149 // (The PopFrame call ensures that the caller of the popped frame is
2150 // either interpreted or compiled and deoptimizes it if compiled.)
2151 // In this case, we can't call dispatch_next() after the frame is
2152 // popped, but instead must save the incoming arguments and restore
2153 // them after deoptimization has occurred.
2154 //
2155 // Note that we don't compare the return PC against the
2156 // deoptimization blob's unpack entry because of the presence of
2157 // adapter frames in C2.
2158 NearLabel caller_not_deoptimized;
2159 __ z_lg(Z_ARG1, _z_parent_ijava_frame_abi(return_pc), Z_fp);
2160 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), Z_ARG1);
2161 __ compareU64_and_branch(Z_RET, (intptr_t)0, Assembler::bcondNotEqual, caller_not_deoptimized);
2162
2163 // Compute size of arguments for saving when returning to
2164 // deoptimized caller.
2165 __ get_method(Z_ARG2);
2166 __ z_lg(Z_ARG2, Address(Z_ARG2, Method::const_offset()));
2167 __ z_llgh(Z_ARG2, Address(Z_ARG2, ConstMethod::size_of_parameters_offset()));
2168 __ z_sllg(Z_ARG2, Z_ARG2, Interpreter::logStackElementSize); // slots 2 bytes
2169 __ restore_locals();
2170 // Compute address of args to be saved.
2171 __ z_lgr(Z_ARG3, Z_locals);
2172 __ z_slgr(Z_ARG3, Z_ARG2);
2173 __ add2reg(Z_ARG3, wordSize);
2174 // Save these arguments.
2175 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args),
2176 Z_thread, Z_ARG2, Z_ARG3);
2177
2178 __ remove_activation(vtos, Z_R14,
2179 /* throw_monitor_exception */ false,
2180 /* install_monitor_exception */ false,
2181 /* notify_jvmdi */ false);
2182
2183 // Inform deoptimization that it is responsible for restoring
2184 // these arguments.
2185 __ store_const(thread_(popframe_condition),
2186 JavaThread::popframe_force_deopt_reexecution_bit,
2187 Z_tmp_1, false);
2188
2189 // Continue in deoptimization handler.
2190 __ z_br(Z_R14);
2191
2192 __ bind(caller_not_deoptimized);
2193 }
2194
2195 // Clear the popframe condition flag.
2196 __ clear_mem(thread_(popframe_condition), sizeof(int));
2197
2198 __ remove_activation(vtos,
2199 noreg, // Retaddr is not used.
2200 false, // throw_monitor_exception
2201 false, // install_monitor_exception
2202 false); // notify_jvmdi
2203 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
2204 __ restore_bcp();
2205 __ restore_locals();
2206 __ restore_esp();
2207 // The method data pointer was incremented already during
2208 // call profiling. We have to restore the mdp for the current bcp.
2209 if (ProfileInterpreter) {
2210 __ set_method_data_pointer_for_bcp();
2211 }
2212 #if INCLUDE_JVMTI
2213 {
2214 Label L_done;
2215
2216 __ z_cli(0, Z_bcp, Bytecodes::_invokestatic);
2217 __ z_brc(Assembler::bcondNotEqual, L_done);
2218
2219 // The member name argument must be restored if _invokestatic is
2220 // re-executed after a PopFrame call. Detect such a case in the
2221 // InterpreterRuntime function and return the member name
2222 // argument, or NULL.
2223 __ z_lg(Z_ARG2, Address(Z_locals));
2224 __ get_method(Z_ARG3);
2225 __ call_VM(Z_tmp_1,
2226 CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null),
2227 Z_ARG2, Z_ARG3, Z_bcp);
2228
2229 __ z_ltgr(Z_tmp_1, Z_tmp_1);
2230 __ z_brc(Assembler::bcondEqual, L_done);
2231
2232 __ z_stg(Z_tmp_1, Address(Z_esp, wordSize));
2233 __ bind(L_done);
2234 }
2235 #endif // INCLUDE_JVMTI
2236 __ dispatch_next(vtos);
2237 // End of PopFrame support.
2238 Interpreter::_remove_activation_entry = __ pc();
2239
2240 // In between activations - previous activation type unknown yet
2241 // compute continuation point - the continuation point expects the
2242 // following registers set up:
2243 //
2244 // Z_ARG1 (==Z_tos): exception
2245 // Z_ARG2 : return address/pc that threw exception
2246
2247 Register return_pc = Z_tmp_1;
2248 Register handler = Z_tmp_2;
2249 assert(return_pc->is_nonvolatile(), "use non-volatile reg. to preserve exception pc");
2250 assert(handler->is_nonvolatile(), "use non-volatile reg. to handler pc");
2251 __ asm_assert_ijava_state_magic(return_pc/*tmp*/); // The top frame should be an interpreter frame.
2252 __ z_lg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_fp);
2253
2254 // Moved removing the activation after VM call, because the new top
2255 // frame does not necessarily have the z_abi_160 required for a VM
2256 // call (e.g. if it is compiled).
2257
2258 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
2259 SharedRuntime::exception_handler_for_return_address),
2260 Z_thread, return_pc);
2261 __ z_lgr(handler, Z_RET); // Save exception handler.
2262
2263 // Preserve exception over this code sequence.
2264 __ pop_ptr(Z_ARG1);
2265 __ set_vm_result(Z_ARG1);
2266 // Remove the activation (without doing throws on illegalMonitorExceptions).
2267 __ remove_activation(vtos, noreg/*ret.pc already loaded*/, false/*throw exc*/, true/*install exc*/, false/*notify jvmti*/);
2268 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
2269
2270 __ get_vm_result(Z_ARG1); // Restore exception.
2271 __ verify_oop(Z_ARG1);
2272 __ z_lgr(Z_ARG2, return_pc); // Restore return address.
2273
2274 #ifdef ASSERT
2275 // The return_pc in the new top frame is dead... at least that's my
2276 // current understanding. To assert this I overwrite it.
2277 // Note: for compiled frames the handler is the deopt blob
2278 // which writes Z_ARG2 into the return_pc slot.
2279 __ load_const_optimized(return_pc, 0xb00b1);
2280 __ z_stg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_SP);
2281 #endif
2282
2283 // Z_ARG1 (==Z_tos): exception
2284 // Z_ARG2 : return address/pc that threw exception
2285
2286 // Note that an "issuing PC" is actually the next PC after the call.
2287 __ z_br(handler); // Jump to exception handler of caller.
2288
2289 BLOCK_COMMENT("} throw_exception");
2290 }
2291
2292 //
2293 // JVMTI ForceEarlyReturn support
2294 //
2295 address TemplateInterpreterGenerator::generate_earlyret_entry_for (TosState state) {
2296 address entry = __ pc();
2297
2298 BLOCK_COMMENT("earlyret_entry {");
2299
2300 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP);
2301 __ restore_bcp();
2302 __ restore_locals();
2303 __ restore_esp();
2304 __ empty_expression_stack();
2305 __ load_earlyret_value(state);
2306
2307 Register RjvmtiState = Z_tmp_1;
2308 __ z_lg(RjvmtiState, thread_(jvmti_thread_state));
2309 __ store_const(Address(RjvmtiState, JvmtiThreadState::earlyret_state_offset()),
2310 JvmtiThreadState::earlyret_inactive, 4, 4, Z_R0_scratch);
2311
2312 __ remove_activation(state,
2313 Z_tmp_1, // retaddr
2314 false, // throw_monitor_exception
2315 false, // install_monitor_exception
2316 true); // notify_jvmdi
2317 __ z_br(Z_tmp_1);
2318
2319 BLOCK_COMMENT("} earlyret_entry");
2320
2321 return entry;
2322 }
2323
2324 //-----------------------------------------------------------------------------
2325 // Helper for vtos entry point generation.
2326
2327 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
2328 address& bep,
2329 address& cep,
2330 address& sep,
2331 address& aep,
2332 address& iep,
2333 address& lep,
2334 address& fep,
2335 address& dep,
2336 address& vep) {
2337 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
2338 Label L;
2339 aep = __ pc(); __ push_ptr(); __ z_bru(L);
2340 fep = __ pc(); __ push_f(); __ z_bru(L);
2341 dep = __ pc(); __ push_d(); __ z_bru(L);
2342 lep = __ pc(); __ push_l(); __ z_bru(L);
2343 bep = cep = sep =
2344 iep = __ pc(); __ push_i();
2345 vep = __ pc();
2346 __ bind(L);
2347 generate_and_dispatch(t);
2348 }
2349
2350 //-----------------------------------------------------------------------------
2351
2352 #ifndef PRODUCT
2353 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
2354 address entry = __ pc();
2355 NearLabel counter_below_trace_threshold;
2356
2357 if (TraceBytecodesAt > 0) {
2358 // Skip runtime call, if the trace threshold is not yet reached.
2359 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value);
2360 __ load_absolute_address(Z_tmp_2, (address)&TraceBytecodesAt);
2361 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/);
2362 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/);
2363 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, counter_below_trace_threshold);
2364 }
2365
2366 int offset2 = state == ltos || state == dtos ? 2 : 1;
2367
2368 __ push(state);
2369 // Preserved return pointer is in Z_R14.
2370 // InterpreterRuntime::trace_bytecode() preserved and returns the value passed as second argument.
2371 __ z_lgr(Z_ARG2, Z_R14);
2372 __ z_lg(Z_ARG3, Address(Z_esp, Interpreter::expr_offset_in_bytes(0)));
2373 if (WizardMode) {
2374 __ z_lgr(Z_ARG4, Z_esp); // Trace Z_esp in WizardMode.
2375 } else {
2376 __ z_lg(Z_ARG4, Address(Z_esp, Interpreter::expr_offset_in_bytes(offset2)));
2377 }
2378 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), Z_ARG2, Z_ARG3, Z_ARG4);
2379 __ z_lgr(Z_R14, Z_RET); // Estore return address (see above).
2380 __ pop(state);
2381
2382 __ bind(counter_below_trace_threshold);
2383 __ z_br(Z_R14); // return
2384
2385 return entry;
2386 }
2387
2388 // Make feasible for old CPUs.
2389 void TemplateInterpreterGenerator::count_bytecode() {
2390 __ load_absolute_address(Z_R1_scratch, (address) &BytecodeCounter::_counter_value);
2391 __ add2mem_32(Address(Z_R1_scratch), 1, Z_R0_scratch);
2392 }
2393
2394 void TemplateInterpreterGenerator::histogram_bytecode(Template * t) {
2395 __ load_absolute_address(Z_R1_scratch, (address)&BytecodeHistogram::_counters[ t->bytecode() ]);
2396 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1);
2397 }
2398
2399 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template * t) {
2400 Address index_addr(Z_tmp_1, (intptr_t) 0);
2401 Register index = Z_tmp_2;
2402
2403 // Load previous index.
2404 __ load_absolute_address(Z_tmp_1, (address) &BytecodePairHistogram::_index);
2405 __ mem2reg_opt(index, index_addr, false);
2406
2407 // Mask with current bytecode and store as new previous index.
2408 __ z_srl(index, BytecodePairHistogram::log2_number_of_codes);
2409 __ load_const_optimized(Z_R0_scratch,
2410 (int)t->bytecode() << BytecodePairHistogram::log2_number_of_codes);
2411 __ z_or(index, Z_R0_scratch);
2412 __ reg2mem_opt(index, index_addr, false);
2413
2414 // Load counter array's address.
2415 __ z_lgfr(index, index); // Sign extend for addressing.
2416 __ z_sllg(index, index, LogBytesPerInt); // index2bytes
2417 __ load_absolute_address(Z_R1_scratch,
2418 (address) &BytecodePairHistogram::_counters);
2419 // Add index and increment counter.
2420 __ z_agr(Z_R1_scratch, index);
2421 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1);
2422 }
2423
2424 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
2425 // Call a little run-time stub to avoid blow-up for each bytecode.
2426 // The run-time runtime saves the right registers, depending on
2427 // the tosca in-state for the given template.
2428 address entry = Interpreter::trace_code(t->tos_in());
2429 guarantee(entry != NULL, "entry must have been generated");
2430 __ call_stub(entry);
2431 }
2432
2433 void TemplateInterpreterGenerator::stop_interpreter_at() {
2434 NearLabel L;
2435
2436 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value);
2437 __ load_absolute_address(Z_tmp_2, (address)&StopInterpreterAt);
2438 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/);
2439 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/);
2440 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, L);
2441 assert(Z_tmp_1->is_nonvolatile(), "must be nonvolatile to preserve Z_tos");
2442 assert(Z_F8->is_nonvolatile(), "must be nonvolatile to preserve Z_ftos");
2443 __ z_lgr(Z_tmp_1, Z_tos); // Save tos.
2444 __ z_lgr(Z_tmp_2, Z_bytecode); // Save Z_bytecode.
2445 __ z_ldr(Z_F8, Z_ftos); // Save ftos.
2446 // Use -XX:StopInterpreterAt=<num> to set the limit
2447 // and break at breakpoint().
2448 __ call_VM(noreg, CAST_FROM_FN_PTR(address, breakpoint), false);
2449 __ z_lgr(Z_tos, Z_tmp_1); // Restore tos.
2450 __ z_lgr(Z_bytecode, Z_tmp_2); // Save Z_bytecode.
2451 __ z_ldr(Z_ftos, Z_F8); // Restore ftos.
2452 __ bind(L);
2453 }
2454
2455 #endif // !PRODUCT