1 /*
2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016, 2017, 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 __ push_frame_abi160(4*BytesPerWord); // Reserve space to save the tmp_[1..4] registers.
125 __ z_stmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // Save registers only after frame is pushed.
126
127 __ z_lgr(arg_java, Z_ARG1);
128
129 Register method = Z_ARG2; // Directly load into correct argument register.
130
131 __ get_method(method);
132 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_signature), Z_thread, method);
133
134 // Move signature to callee saved register.
135 // Don't directly write to stack. Frame is used by VM call.
136 __ z_lgr(Z_tmp_1, Z_RET);
137
138 // Reload method. Register may have been altered by VM call.
139 __ get_method(method);
140
141 // Get address of result handler.
142 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_result_handler), Z_thread, method);
143
144 // Save signature address to stack.
145 __ z_stg(Z_tmp_1, d_signature, Z_SP);
146
147 // Don't overwrite return value (Z_RET, Z_ARG1) in rest of the method !
148
149 {
150 Label isStatic;
151
152 // Test if static.
153 // We can test the bit directly.
154 // Path is Z_method->_access_flags._flags.
155 // We only support flag bits in the least significant byte (assert !).
156 // Therefore add 3 to address that byte within "_flags".
157 // Reload method. VM call above may have destroyed register contents
158 __ get_method(method);
159 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT);
160 method = noreg; // end of life
161 __ z_btrue(isStatic);
162
163 // For non-static functions, pass "this" in Z_ARG2 and copy it to 2nd C-arg slot.
164 // Need to box the Java object here, so we use arg_java
165 // (address of current Java stack slot) as argument and
166 // don't dereference it as in case of ints, floats, etc..
167 __ z_lgr(Z_ARG2, arg_java);
168 __ add2reg(arg_java, -BytesPerWord);
169 __ bind(isStatic);
170 }
171
172 // argcnt == 0 corresponds to 3rd C argument.
173 // arg #1 (result handler) and
174 // arg #2 (this, for non-statics), unused else
175 // are reserved and pre-filled above.
176 // arg_java points to the corresponding Java argument here. It
177 // has been decremented by one argument (this) in case of non-static.
178 __ clear_reg(argcnt, true, false); // Don't set CC.
179 __ z_lg(target_sp, 0, Z_SP);
180 __ add2reg(arg_c, _z_abi(remaining_cargs), target_sp);
181 // No floating-point args parsed so far.
182 __ clear_mem(Address(Z_SP, d_fpcnt), 8);
183
184 NearLabel move_intSlot_to_ARG, move_floatSlot_to_FARG;
185 NearLabel loop_start, loop_start_restore, loop_end;
186 NearLabel do_int, do_long, do_float, do_double;
187 NearLabel do_dontreachhere, do_object, do_array, do_boxed;
188
189 #ifdef ASSERT
190 // Signature needs to point to '(' (== 0x28) at entry.
191 __ z_lg(signature, d_signature, Z_SP);
192 __ z_cli(0, signature, (int) '(');
193 __ z_brne(do_dontreachhere);
194 #endif
195
196 __ bind(loop_start_restore);
197 __ z_lg(signature, d_signature, Z_SP); // Restore signature ptr, destroyed by move_XX_to_ARG.
198
199 BIND(loop_start);
200 // Advance to next argument type token from the signature.
201 __ add2reg(signature, 1);
202
203 // Use CLI, works well on all CPU versions.
204 __ z_cli(0, signature, (int) ')');
205 __ z_bre(loop_end); // end of signature
206 __ z_cli(0, signature, (int) 'L');
207 __ z_bre(do_object); // object #9
208 __ z_cli(0, signature, (int) 'F');
209 __ z_bre(do_float); // float #7
210 __ z_cli(0, signature, (int) 'J');
211 __ z_bre(do_long); // long #6
212 __ z_cli(0, signature, (int) 'B');
213 __ z_bre(do_int); // byte #1
214 __ z_cli(0, signature, (int) 'Z');
215 __ z_bre(do_int); // boolean #2
216 __ z_cli(0, signature, (int) 'C');
217 __ z_bre(do_int); // char #3
218 __ z_cli(0, signature, (int) 'S');
219 __ z_bre(do_int); // short #4
220 __ z_cli(0, signature, (int) 'I');
221 __ z_bre(do_int); // int #5
222 __ z_cli(0, signature, (int) 'D');
223 __ z_bre(do_double); // double #8
224 __ z_cli(0, signature, (int) '[');
225 __ z_bre(do_array); // array #10
226
227 __ bind(do_dontreachhere);
228
229 __ unimplemented("ShouldNotReachHere in slow_signature_handler", 120);
230
231 // Array argument
232 BIND(do_array);
233
234 {
235 Label start_skip, end_skip;
236
237 __ bind(start_skip);
238
239 // Advance to next type tag from signature.
240 __ add2reg(signature, 1);
241
242 // Use CLI, works well on all CPU versions.
243 __ z_cli(0, signature, (int) '[');
244 __ z_bre(start_skip); // Skip further brackets.
245
246 __ z_cli(0, signature, (int) '9');
247 __ z_brh(end_skip); // no optional size
248
249 __ z_cli(0, signature, (int) '0');
250 __ z_brnl(start_skip); // Skip optional size.
251
252 __ bind(end_skip);
253
254 __ z_cli(0, signature, (int) 'L');
255 __ z_brne(do_boxed); // If not array of objects: go directly to do_boxed.
256 }
257
258 // OOP argument
259 BIND(do_object);
260 // Pass by an object's type name.
261 {
262 Label L;
263
264 __ add2reg(sig_end, 4095, signature); // Assume object type name is shorter than 4k.
265 __ load_const_optimized(Z_R0, (int) ';'); // Type name terminator (must be in Z_R0!).
266 __ MacroAssembler::search_string(sig_end, signature);
267 __ z_brl(L);
268 __ z_illtrap(); // No semicolon found: internal error or object name too long.
269 __ bind(L);
270 __ z_lgr(signature, sig_end);
271 // fallthru to do_boxed
272 }
273
274 // Need to box the Java object here, so we use arg_java
275 // (address of current Java stack slot) as argument and
276 // don't dereference it as in case of ints, floats, etc..
277
278 // UNBOX argument
279 // Load reference and check for NULL.
280 Label do_int_Entry4Boxed;
281 __ bind(do_boxed);
282 {
283 __ load_and_test_long(intSlot, Address(arg_java));
284 __ z_bre(do_int_Entry4Boxed);
285 __ z_lgr(intSlot, arg_java);
286 __ z_bru(do_int_Entry4Boxed);
287 }
288
289 // INT argument
290
291 // (also for byte, boolean, char, short)
292 // Use lgf for load (sign-extend) and stg for store.
293 BIND(do_int);
294 __ z_lgf(intSlot, 0, arg_java);
295
296 __ bind(do_int_Entry4Boxed);
297 __ add2reg(arg_java, -BytesPerWord);
298 // If argument fits into argument register, go and handle it, otherwise continue.
299 __ compare32_and_branch(argcnt, max_int_register_arguments,
300 Assembler::bcondLow, move_intSlot_to_ARG);
301 __ z_stg(intSlot, 0, arg_c);
302 __ add2reg(arg_c, BytesPerWord);
303 __ z_bru(loop_start);
304
305 // LONG argument
306
307 BIND(do_long);
308 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg.
309 __ z_lg(intSlot, BytesPerWord, arg_java);
310 // If argument fits into argument register, go and handle it, otherwise continue.
311 __ compare32_and_branch(argcnt, max_int_register_arguments,
312 Assembler::bcondLow, move_intSlot_to_ARG);
313 __ z_stg(intSlot, 0, arg_c);
314 __ add2reg(arg_c, BytesPerWord);
315 __ z_bru(loop_start);
316
317 // FLOAT argumen
318
319 BIND(do_float);
320 __ z_le(floatSlot, 0, arg_java);
321 __ add2reg(arg_java, -BytesPerWord);
322 assert(max_fp_register_arguments <= 255, "always true"); // safety net
323 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments);
324 __ z_brl(move_floatSlot_to_FARG);
325 __ z_ste(floatSlot, 4, arg_c);
326 __ add2reg(arg_c, BytesPerWord);
327 __ z_bru(loop_start);
328
329 // DOUBLE argument
330
331 BIND(do_double);
332 __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg.
333 __ z_ld(floatSlot, BytesPerWord, arg_java);
334 assert(max_fp_register_arguments <= 255, "always true"); // safety net
335 __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments);
336 __ z_brl(move_floatSlot_to_FARG);
337 __ z_std(floatSlot, 0, arg_c);
338 __ add2reg(arg_c, BytesPerWord);
339 __ z_bru(loop_start);
340
341 // Method exit, all arguments proocessed.
342 __ bind(loop_end);
343 __ z_lmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // restore registers before frame is popped.
344 __ pop_frame();
345 __ restore_return_pc();
346 __ z_br(Z_R14);
347
348 // Copy int arguments.
349
350 Label iarg_caselist; // Distance between each case has to be a power of 2
351 // (= 1 << LogSizeOfCase).
352 __ align(16);
353 BIND(iarg_caselist);
354 __ z_lgr(Z_ARG3, intSlot); // 4 bytes
355 __ z_bru(loop_start_restore); // 4 bytes
356
357 __ z_lgr(Z_ARG4, intSlot);
358 __ z_bru(loop_start_restore);
359
360 __ z_lgr(Z_ARG5, intSlot);
361 __ z_bru(loop_start_restore);
362
363 __ align(16);
364 __ bind(move_intSlot_to_ARG);
365 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch.
366 __ z_larl(Z_R1_scratch, iarg_caselist);
367 __ z_sllg(Z_R0_scratch, argcnt, LogSizeOfCase);
368 __ add2reg(argcnt, 1);
369 __ z_agr(Z_R1_scratch, Z_R0_scratch);
370 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch);
371
372 // Copy float arguments.
373
374 Label farg_caselist; // Distance between each case has to be a power of 2
375 // (= 1 << logSizeOfCase, padded with nop.
376 __ align(16);
377 BIND(farg_caselist);
378 __ z_ldr(Z_FARG1, floatSlot); // 2 bytes
379 __ z_bru(loop_start_restore); // 4 bytes
380 __ z_nop(); // 2 bytes
381
382 __ z_ldr(Z_FARG2, floatSlot);
383 __ z_bru(loop_start_restore);
384 __ z_nop();
385
386 __ z_ldr(Z_FARG3, floatSlot);
387 __ z_bru(loop_start_restore);
388 __ z_nop();
389
390 __ z_ldr(Z_FARG4, floatSlot);
391 __ z_bru(loop_start_restore);
392 __ z_nop();
393
394 __ align(16);
395 __ bind(move_floatSlot_to_FARG);
396 __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch.
397 __ z_lg(Z_R0_scratch, d_fpcnt, Z_SP); // Need old value for indexing.
398 __ add2mem_64(Address(Z_SP, d_fpcnt), 1, Z_R1_scratch); // Increment index.
399 __ z_larl(Z_R1_scratch, farg_caselist);
400 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogSizeOfCase);
401 __ z_agr(Z_R1_scratch, Z_R0_scratch);
402 __ z_bcr(Assembler::bcondAlways, Z_R1_scratch);
403
404 BLOCK_COMMENT("} slow_signature_handler");
405
406 return __ addr_at(entry_offset);
407 }
408
409 address TemplateInterpreterGenerator::generate_result_handler_for (BasicType type) {
410 address entry = __ pc();
411
412 assert(Z_tos == Z_RET, "Result handler: must move result!");
413 assert(Z_ftos == Z_FRET, "Result handler: must move float result!");
414
415 switch (type) {
416 case T_BOOLEAN:
417 __ c2bool(Z_tos);
418 break;
419 case T_CHAR:
420 __ and_imm(Z_tos, 0xffff);
421 break;
422 case T_BYTE:
423 __ z_lbr(Z_tos, Z_tos);
424 break;
425 case T_SHORT:
426 __ z_lhr(Z_tos, Z_tos);
427 break;
428 case T_INT:
429 case T_LONG:
430 case T_VOID:
431 case T_FLOAT:
432 case T_DOUBLE:
433 break;
434 case T_OBJECT:
435 // Retrieve result from frame...
436 __ mem2reg_opt(Z_tos, Address(Z_fp, oop_tmp_offset));
437 // and verify it.
438 __ verify_oop(Z_tos);
439 break;
440 default:
441 ShouldNotReachHere();
442 }
443 __ z_br(Z_R14); // Return from result handler.
444 return entry;
445 }
446
447 // Abstract method entry.
448 // Attempt to execute abstract method. Throw exception.
449 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
450 unsigned int entry_offset = __ offset();
451
452 // Caller could be the call_stub or a compiled method (x86 version is wrong!).
453
454 BLOCK_COMMENT("abstract_entry {");
455
456 // Implement call of InterpreterRuntime::throw_AbstractMethodError.
457 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1);
458 __ save_return_pc(); // Save Z_R14.
459 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14.
460
461 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod),
462 Z_thread, Z_method);
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 continuation) {
693 address entry = __ pc();
694
695 BLOCK_COMMENT("deopt_entry {");
696
697 // TODO(ZASM): necessary? NULL last_sp until next java call
698 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
699 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
700 __ restore_bcp();
701 __ restore_locals();
702 __ restore_esp();
703
704 // Handle exceptions.
705 {
706 Label L;
707 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception));
708 __ z_bre(L);
709 __ call_VM(noreg,
710 CAST_FROM_FN_PTR(address,
711 InterpreterRuntime::throw_pending_exception));
712 __ should_not_reach_here();
713 __ bind(L);
714 }
715 if (continuation == NULL) {
716 __ dispatch_next(state, step);
717 } else {
718 __ jump_to_entry(continuation, Z_R1_scratch);
719 }
720
721 BLOCK_COMMENT("} deopt_entry");
722
723 return entry;
724 }
725
726 address TemplateInterpreterGenerator::generate_safept_entry_for (TosState state,
727 address runtime_entry) {
728 address entry = __ pc();
729 __ push(state);
730 __ call_VM(noreg, runtime_entry);
731 __ dispatch_via(vtos, Interpreter::_normal_table.table_for (vtos));
732 return entry;
733 }
734
735 //
736 // Helpers for commoning out cases in the various type of method entries.
737 //
738
739 // Increment invocation count & check for overflow.
740 //
741 // Note: checking for negative value instead of overflow
742 // so we have a 'sticky' overflow test.
743 //
744 // Z_ARG2: method (see generate_fixed_frame())
745 //
746 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
747 Label done;
748 Register method = Z_ARG2; // Generate_fixed_frame() copies Z_method into Z_ARG2.
749 Register m_counters = Z_ARG4;
750
751 BLOCK_COMMENT("counter_incr {");
752
753 // Note: In tiered we increment either counters in method or in MDO depending
754 // if we are profiling or not.
755 if (TieredCompilation) {
756 int increment = InvocationCounter::count_increment;
757 if (ProfileInterpreter) {
758 NearLabel no_mdo;
759 Register mdo = m_counters;
760 // Are we profiling?
761 __ load_and_test_long(mdo, method2_(method, method_data));
762 __ branch_optimized(Assembler::bcondZero, no_mdo);
763 // Increment counter in the MDO.
764 const Address mdo_invocation_counter(mdo, MethodData::invocation_counter_offset() +
765 InvocationCounter::counter_offset());
766 const Address mask(mdo, MethodData::invoke_mask_offset());
767 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask,
768 Z_R1_scratch, false, Assembler::bcondZero,
769 overflow);
770 __ z_bru(done);
771 __ bind(no_mdo);
772 }
773
774 // Increment counter in MethodCounters.
775 const Address invocation_counter(m_counters,
776 MethodCounters::invocation_counter_offset() +
777 InvocationCounter::counter_offset());
778 // Get address of MethodCounters object.
779 __ get_method_counters(method, m_counters, done);
780 const Address mask(m_counters, MethodCounters::invoke_mask_offset());
781 __ increment_mask_and_jump(invocation_counter,
782 increment, mask,
783 Z_R1_scratch, false, Assembler::bcondZero,
784 overflow);
785 } else {
786 Register counter_sum = Z_ARG3; // The result of this piece of code.
787 Register tmp = Z_R1_scratch;
788 #ifdef ASSERT
789 {
790 NearLabel ok;
791 __ get_method(tmp);
792 __ compare64_and_branch(method, tmp, Assembler::bcondEqual, ok);
793 __ z_illtrap(0x66);
794 __ bind(ok);
795 }
796 #endif
797
798 // Get address of MethodCounters object.
799 __ get_method_counters(method, m_counters, done);
800 // Update standard invocation counters.
801 __ increment_invocation_counter(m_counters, counter_sum);
802 if (ProfileInterpreter) {
803 __ add2mem_32(Address(m_counters, MethodCounters::interpreter_invocation_counter_offset()), 1, tmp);
804 if (profile_method != NULL) {
805 const Address profile_limit(m_counters, MethodCounters::interpreter_profile_limit_offset());
806 __ z_cl(counter_sum, profile_limit);
807 __ branch_optimized(Assembler::bcondLow, *profile_method_continue);
808 // If no method data exists, go to profile_method.
809 __ test_method_data_pointer(tmp, *profile_method);
810 }
811 }
812
813 const Address invocation_limit(m_counters, MethodCounters::interpreter_invocation_limit_offset());
814 __ z_cl(counter_sum, invocation_limit);
815 __ branch_optimized(Assembler::bcondNotLow, *overflow);
816 }
817
818 __ bind(done);
819
820 BLOCK_COMMENT("} counter_incr");
821 }
822
823 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
824 // InterpreterRuntime::frequency_counter_overflow takes two
825 // arguments, the first (thread) is passed by call_VM, the second
826 // indicates if the counter overflow occurs at a backwards branch
827 // (NULL bcp). We pass zero for it. The call returns the address
828 // of the verified entry point for the method or NULL if the
829 // compilation did not complete (either went background or bailed
830 // out).
831 __ clear_reg(Z_ARG2);
832 __ call_VM(noreg,
833 CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow),
834 Z_ARG2);
835 __ z_bru(do_continue);
836 }
837
838 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register frame_size, Register tmp1) {
839 Register tmp2 = Z_R1_scratch;
840 const int page_size = os::vm_page_size();
841 NearLabel after_frame_check;
842
843 BLOCK_COMMENT("counter_overflow {");
844
845 assert_different_registers(frame_size, tmp1);
846
847 // Stack banging is sufficient overflow check if frame_size < page_size.
848 if (Immediate::is_uimm(page_size, 15)) {
849 __ z_chi(frame_size, page_size);
850 __ z_brl(after_frame_check);
851 } else {
852 __ load_const_optimized(tmp1, page_size);
853 __ compareU32_and_branch(frame_size, tmp1, Assembler::bcondLow, after_frame_check);
854 }
855
856 // Get the stack base, and in debug, verify it is non-zero.
857 __ z_lg(tmp1, thread_(stack_base));
858 #ifdef ASSERT
859 address reentry = NULL;
860 NearLabel base_not_zero;
861 __ compareU64_and_branch(tmp1, (intptr_t)0L, Assembler::bcondNotEqual, base_not_zero);
862 reentry = __ stop_chain_static(reentry, "stack base is zero in generate_stack_overflow_check");
863 __ bind(base_not_zero);
864 #endif
865
866 // Get the stack size, and in debug, verify it is non-zero.
867 assert(sizeof(size_t) == sizeof(intptr_t), "wrong load size");
868 __ z_lg(tmp2, thread_(stack_size));
869 #ifdef ASSERT
870 NearLabel size_not_zero;
871 __ compareU64_and_branch(tmp2, (intptr_t)0L, Assembler::bcondNotEqual, size_not_zero);
872 reentry = __ stop_chain_static(reentry, "stack size is zero in generate_stack_overflow_check");
873 __ bind(size_not_zero);
874 #endif
875
876 // Compute the beginning of the protected zone minus the requested frame size.
877 __ z_sgr(tmp1, tmp2);
878 __ add2reg(tmp1, JavaThread::stack_guard_zone_size());
879
880 // Add in the size of the frame (which is the same as subtracting it from the
881 // SP, which would take another register.
882 __ z_agr(tmp1, frame_size);
883
884 // The frame is greater than one page in size, so check against
885 // the bottom of the stack.
886 __ compareU64_and_branch(Z_SP, tmp1, Assembler::bcondHigh, after_frame_check);
887
888 // The stack will overflow, throw an exception.
889
890 // Restore SP to sender's sp. This is necessary if the sender's frame is an
891 // extended compiled frame (see gen_c2i_adapter()) and safer anyway in case of
892 // JSR292 adaptations.
893 __ resize_frame_absolute(Z_R10, tmp1, true/*load_fp*/);
894
895 // Note also that the restored frame is not necessarily interpreted.
896 // Use the shared runtime version of the StackOverflowError.
897 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
898 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry());
899 __ load_absolute_address(tmp1, StubRoutines::throw_StackOverflowError_entry());
900 __ z_br(tmp1);
901
902 // If you get to here, then there is enough stack space.
903 __ bind(after_frame_check);
904
905 BLOCK_COMMENT("} counter_overflow");
906 }
907
908 // Allocate monitor and lock method (asm interpreter).
909 //
910 // Args:
911 // Z_locals: locals
912
913 void TemplateInterpreterGenerator::lock_method(void) {
914
915 BLOCK_COMMENT("lock_method {");
916
917 // Synchronize method.
918 const Register method = Z_tmp_2;
919 __ get_method(method);
920
921 #ifdef ASSERT
922 address reentry = NULL;
923 {
924 Label L;
925 __ testbit(method2_(method, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
926 __ z_btrue(L);
927 reentry = __ stop_chain_static(reentry, "method doesn't need synchronization");
928 __ bind(L);
929 }
930 #endif // ASSERT
931
932 // Get synchronization object.
933 const Register object = Z_tmp_2;
934
935 {
936 Label done;
937 Label static_method;
938
939 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT);
940 __ z_btrue(static_method);
941
942 // non-static method: Load receiver obj from stack.
943 __ mem2reg_opt(object, Address(Z_locals, Interpreter::local_offset_in_bytes(0)));
944 __ z_bru(done);
945
946 __ bind(static_method);
947
948 // Lock the java mirror.
949 __ load_mirror(object, method);
950 #ifdef ASSERT
951 {
952 NearLabel L;
953 __ compare64_and_branch(object, (intptr_t) 0, Assembler::bcondNotEqual, L);
954 reentry = __ stop_chain_static(reentry, "synchronization object is NULL");
955 __ bind(L);
956 }
957 #endif // ASSERT
958
959 __ bind(done);
960 }
961
962 __ add_monitor_to_stack(true, Z_ARG3, Z_ARG4, Z_ARG5); // Allocate monitor elem.
963 // Store object and lock it.
964 __ get_monitors(Z_tmp_1);
965 __ reg2mem_opt(object, Address(Z_tmp_1, BasicObjectLock::obj_offset_in_bytes()));
966 __ lock_object(Z_tmp_1, object);
967
968 BLOCK_COMMENT("} lock_method");
969 }
970
971 // Generate a fixed interpreter frame. This is identical setup for
972 // interpreted methods and for native methods hence the shared code.
973 //
974 // Registers alive
975 // Z_thread - JavaThread*
976 // Z_SP - old stack pointer
977 // Z_method - callee's method
978 // Z_esp - parameter list (slot 'above' last param)
979 // Z_R14 - return pc, to be stored in caller's frame
980 // Z_R10 - sender sp, note: Z_tmp_1 is Z_R10!
981 //
982 // Registers updated
983 // Z_SP - new stack pointer
984 // Z_esp - callee's operand stack pointer
985 // points to the slot above the value on top
986 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
987 // Z_bcp - the bytecode pointer
988 // Z_fp - the frame pointer, thereby killing Z_method
989 // Z_ARG2 - copy of Z_method
990 //
991 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
992
993 // stack layout
994 //
995 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (see note below)
996 // [F1's operand stack (unused)]
997 // [F1's outgoing Java arguments] <-- Z_esp
998 // [F1's operand stack (non args)]
999 // [monitors] (optional)
1000 // [IJAVA_STATE]
1001 //
1002 // F2 [PARENT_IJAVA_FRAME_ABI]
1003 // ...
1004 //
1005 // 0x000
1006 //
1007 // Note: Z_R10, the sender sp, will be below Z_SP if F1 was extended by a c2i adapter.
1008
1009 //=============================================================================
1010 // Allocate space for locals other than the parameters, the
1011 // interpreter state, monitors, and the expression stack.
1012
1013 const Register local_count = Z_ARG5;
1014 const Register fp = Z_tmp_2;
1015
1016 BLOCK_COMMENT("generate_fixed_frame {");
1017
1018 {
1019 // local registers
1020 const Register top_frame_size = Z_ARG2;
1021 const Register sp_after_resize = Z_ARG3;
1022 const Register max_stack = Z_ARG4;
1023
1024 // local_count = method->constMethod->max_locals();
1025 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1026 __ z_llgh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset()));
1027
1028 if (native_call) {
1029 // If we're calling a native method, we replace max_stack (which is
1030 // zero) with space for the worst-case signature handler varargs
1031 // vector, which is:
1032 // max_stack = max(Argument::n_register_parameters, parameter_count+2);
1033 //
1034 // We add two slots to the parameter_count, one for the jni
1035 // environment and one for a possible native mirror. We allocate
1036 // space for at least the number of ABI registers, even though
1037 // InterpreterRuntime::slow_signature_handler won't write more than
1038 // parameter_count+2 words when it creates the varargs vector at the
1039 // top of the stack. The generated slow signature handler will just
1040 // load trash into registers beyond the necessary number. We're
1041 // still going to cut the stack back by the ABI register parameter
1042 // count so as to get SP+16 pointing at the ABI outgoing parameter
1043 // area, so we need to allocate at least that much even though we're
1044 // going to throw it away.
1045 //
1046
1047 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1048 __ z_llgh(max_stack, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset()));
1049 __ add2reg(max_stack, 2);
1050
1051 NearLabel passing_args_on_stack;
1052
1053 // max_stack in bytes
1054 __ z_sllg(max_stack, max_stack, LogBytesPerWord);
1055
1056 int argument_registers_in_bytes = Argument::n_register_parameters << LogBytesPerWord;
1057 __ compare64_and_branch(max_stack, argument_registers_in_bytes, Assembler::bcondNotLow, passing_args_on_stack);
1058
1059 __ load_const_optimized(max_stack, argument_registers_in_bytes);
1060
1061 __ bind(passing_args_on_stack);
1062 } else {
1063 // !native_call
1064 __ z_lg(max_stack, method_(const));
1065
1066 // Calculate number of non-parameter locals (in slots):
1067 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1068 __ z_sh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset()));
1069
1070 // max_stack = method->max_stack();
1071 __ z_llgh(max_stack, Address(max_stack, ConstMethod::max_stack_offset()));
1072 // max_stack in bytes
1073 __ z_sllg(max_stack, max_stack, LogBytesPerWord);
1074 }
1075
1076 // Resize (i.e. normally shrink) the top frame F1 ...
1077 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10
1078 // F1's operand stack (free)
1079 // ...
1080 // F1's operand stack (free) <-- Z_esp
1081 // F1's outgoing Java arg m
1082 // ...
1083 // F1's outgoing Java arg 0
1084 // ...
1085 //
1086 // ... into a parent frame (Z_R10 holds F1's SP before any modification, see also above)
1087 //
1088 // +......................+
1089 // : : <-- Z_R10, saved below as F0's z_ijava_state.sender_sp
1090 // : :
1091 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_SP \
1092 // F0's non arg local | = delta
1093 // ... |
1094 // F0's non arg local <-- Z_esp /
1095 // F1's outgoing Java arg m
1096 // ...
1097 // F1's outgoing Java arg 0
1098 // ...
1099 //
1100 // then push the new top frame F0.
1101 //
1102 // F0 [TOP_IJAVA_FRAME_ABI] = frame::z_top_ijava_frame_abi_size \
1103 // [operand stack] = max_stack | = top_frame_size
1104 // [IJAVA_STATE] = frame::z_ijava_state_size /
1105
1106 // sp_after_resize = Z_esp - delta
1107 //
1108 // delta = PARENT_IJAVA_FRAME_ABI + (locals_count - params_count)
1109
1110 __ add2reg(sp_after_resize, (Interpreter::stackElementSize) - (frame::z_parent_ijava_frame_abi_size), Z_esp);
1111 __ z_sllg(Z_R0_scratch, local_count, LogBytesPerWord); // Params have already been subtracted from local_count.
1112 __ z_slgr(sp_after_resize, Z_R0_scratch);
1113
1114 // top_frame_size = TOP_IJAVA_FRAME_ABI + max_stack + size of interpreter state
1115 __ add2reg(top_frame_size,
1116 frame::z_top_ijava_frame_abi_size +
1117 frame::z_ijava_state_size +
1118 frame::interpreter_frame_monitor_size() * wordSize,
1119 max_stack);
1120
1121 if (!native_call) {
1122 // Stack overflow check.
1123 // Native calls don't need the stack size check since they have no
1124 // expression stack and the arguments are already on the stack and
1125 // we only add a handful of words to the stack.
1126 Register frame_size = max_stack; // Reuse the regiser for max_stack.
1127 __ z_lgr(frame_size, Z_SP);
1128 __ z_sgr(frame_size, sp_after_resize);
1129 __ z_agr(frame_size, top_frame_size);
1130 generate_stack_overflow_check(frame_size, fp/*tmp1*/);
1131 }
1132
1133 DEBUG_ONLY(__ z_cg(Z_R14, _z_abi16(return_pc), Z_SP));
1134 __ asm_assert_eq("killed Z_R14", 0);
1135 __ resize_frame_absolute(sp_after_resize, fp, true);
1136 __ save_return_pc(Z_R14);
1137
1138 // ... and push the new frame F0.
1139 __ push_frame(top_frame_size, fp, true /*copy_sp*/, false);
1140 }
1141
1142 //=============================================================================
1143 // Initialize the new frame F0: initialize interpreter state.
1144
1145 {
1146 // locals
1147 const Register local_addr = Z_ARG4;
1148
1149 BLOCK_COMMENT("generate_fixed_frame: initialize interpreter state {");
1150
1151 #ifdef ASSERT
1152 // Set the magic number (using local_addr as tmp register).
1153 __ load_const_optimized(local_addr, frame::z_istate_magic_number);
1154 __ z_stg(local_addr, _z_ijava_state_neg(magic), fp);
1155 #endif
1156
1157 // Save sender SP from F1 (i.e. before it was potentially modified by an
1158 // adapter) into F0's interpreter state. We us it as well to revert
1159 // resizing the frame above.
1160 __ z_stg(Z_R10, _z_ijava_state_neg(sender_sp), fp);
1161
1162 // Load cp cache and save it at the and of this block.
1163 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1164 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstMethod::constants_offset()));
1165 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstantPool::cache_offset_in_bytes()));
1166
1167 // z_ijava_state->method = method;
1168 __ z_stg(Z_method, _z_ijava_state_neg(method), fp);
1169
1170 // Point locals at the first argument. Method's locals are the
1171 // parameters on top of caller's expression stack.
1172 // Tos points past last Java argument.
1173
1174 __ z_lg(Z_locals, Address(Z_method, Method::const_offset()));
1175 __ z_llgh(Z_locals /*parameter_count words*/,
1176 Address(Z_locals, ConstMethod::size_of_parameters_offset()));
1177 __ z_sllg(Z_locals /*parameter_count bytes*/, Z_locals /*parameter_count*/, LogBytesPerWord);
1178 __ z_agr(Z_locals, Z_esp);
1179 // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0)
1180 // z_ijava_state->locals = Z_esp + parameter_count bytes
1181 __ z_stg(Z_locals, _z_ijava_state_neg(locals), fp);
1182
1183 // z_ijava_state->oop_temp = NULL;
1184 __ store_const(Address(fp, oop_tmp_offset), 0);
1185
1186 // Initialize z_ijava_state->mdx.
1187 Register Rmdp = Z_bcp;
1188 // native_call: assert that mdo == NULL
1189 const bool check_for_mdo = !native_call DEBUG_ONLY(|| native_call);
1190 if (ProfileInterpreter && check_for_mdo) {
1191 Label get_continue;
1192
1193 __ load_and_test_long(Rmdp, method_(method_data));
1194 __ z_brz(get_continue);
1195 DEBUG_ONLY(if (native_call) __ stop("native methods don't have a mdo"));
1196 __ add2reg(Rmdp, in_bytes(MethodData::data_offset()));
1197 __ bind(get_continue);
1198 }
1199 __ z_stg(Rmdp, _z_ijava_state_neg(mdx), fp);
1200
1201 // Initialize z_ijava_state->bcp and Z_bcp.
1202 if (native_call) {
1203 __ clear_reg(Z_bcp); // Must initialize. Will get written into frame where GC reads it.
1204 } else {
1205 __ z_lg(Z_bcp, method_(const));
1206 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset()));
1207 }
1208 __ z_stg(Z_bcp, _z_ijava_state_neg(bcp), fp);
1209
1210 // no monitors and empty operand stack
1211 // => z_ijava_state->monitors points to the top slot in IJAVA_STATE.
1212 // => Z_ijava_state->esp points one slot above into the operand stack.
1213 // z_ijava_state->monitors = fp - frame::z_ijava_state_size - Interpreter::stackElementSize;
1214 // z_ijava_state->esp = Z_esp = z_ijava_state->monitors;
1215 __ add2reg(Z_esp, -frame::z_ijava_state_size, fp);
1216 __ z_stg(Z_esp, _z_ijava_state_neg(monitors), fp);
1217 __ add2reg(Z_esp, -Interpreter::stackElementSize);
1218 __ z_stg(Z_esp, _z_ijava_state_neg(esp), fp);
1219
1220 // z_ijava_state->cpoolCache = Z_R1_scratch (see load above);
1221 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(cpoolCache), fp);
1222
1223 // Get mirror and store it in the frame as GC root for this Method*.
1224 __ load_mirror(Z_R1_scratch, Z_method);
1225 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(mirror), fp);
1226
1227 BLOCK_COMMENT("} generate_fixed_frame: initialize interpreter state");
1228
1229 //=============================================================================
1230 if (!native_call) {
1231 // Fill locals with 0x0s.
1232 NearLabel locals_zeroed;
1233 NearLabel doXC;
1234
1235 // Local_count is already num_locals_slots - num_param_slots.
1236 __ compare64_and_branch(local_count, (intptr_t)0L, Assembler::bcondNotHigh, locals_zeroed);
1237
1238 // Advance local_addr to point behind locals (creates positive incr. in loop).
1239 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1240 __ z_llgh(Z_R0_scratch, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset()));
1241 __ add2reg(Z_R0_scratch, -1);
1242
1243 __ z_lgr(local_addr/*locals*/, Z_locals);
1244 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogBytesPerWord);
1245 __ z_sllg(local_count, local_count, LogBytesPerWord); // Local_count are non param locals.
1246 __ z_sgr(local_addr, Z_R0_scratch);
1247
1248 if (VM_Version::has_Prefetch()) {
1249 __ z_pfd(0x02, 0, Z_R0, local_addr);
1250 __ z_pfd(0x02, 256, Z_R0, local_addr);
1251 }
1252
1253 // Can't optimise for Z10 using "compare and branch" (immediate value is too big).
1254 __ z_cghi(local_count, 256);
1255 __ z_brnh(doXC);
1256
1257 // MVCLE: Initialize if quite a lot locals.
1258 // __ bind(doMVCLE);
1259 __ z_lgr(Z_R0_scratch, local_addr);
1260 __ z_lgr(Z_R1_scratch, local_count);
1261 __ clear_reg(Z_ARG2); // Src len of MVCLE is zero.
1262
1263 __ MacroAssembler::move_long_ext(Z_R0_scratch, Z_ARG1, 0);
1264 __ z_bru(locals_zeroed);
1265
1266 Label XC_template;
1267 __ bind(XC_template);
1268 __ z_xc(0, 0, local_addr, 0, local_addr);
1269
1270 __ bind(doXC);
1271 __ z_bctgr(local_count, Z_R0); // Get #bytes-1 for EXECUTE.
1272 if (VM_Version::has_ExecuteExtensions()) {
1273 __ z_exrl(local_count, XC_template); // Execute XC with variable length.
1274 } else {
1275 __ z_larl(Z_R1_scratch, XC_template);
1276 __ z_ex(local_count, 0, Z_R0, Z_R1_scratch); // Execute XC with variable length.
1277 }
1278
1279 __ bind(locals_zeroed);
1280 }
1281
1282 }
1283 // Finally set the frame pointer, destroying Z_method.
1284 assert(Z_fp == Z_method, "maybe set Z_fp earlier if other register than Z_method");
1285 // Oprofile analysis suggests to keep a copy in a register to be used by
1286 // generate_counter_incr().
1287 __ z_lgr(Z_ARG2, Z_method);
1288 __ z_lgr(Z_fp, fp);
1289
1290 BLOCK_COMMENT("} generate_fixed_frame");
1291 }
1292
1293 // Various method entries
1294
1295 // Math function, frame manager must set up an interpreter state, etc.
1296 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
1297
1298 // Decide what to do: Use same platform specific instructions and runtime calls as compilers.
1299 bool use_instruction = false;
1300 address runtime_entry = NULL;
1301 int num_args = 1;
1302 bool double_precision = true;
1303
1304 // s390 specific:
1305 switch (kind) {
1306 case Interpreter::java_lang_math_sqrt:
1307 case Interpreter::java_lang_math_abs: use_instruction = true; break;
1308 case Interpreter::java_lang_math_fmaF:
1309 case Interpreter::java_lang_math_fmaD: use_instruction = UseFMA; break;
1310 default: break; // Fall back to runtime call.
1311 }
1312
1313 switch (kind) {
1314 case Interpreter::java_lang_math_sin : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); break;
1315 case Interpreter::java_lang_math_cos : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); break;
1316 case Interpreter::java_lang_math_tan : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); break;
1317 case Interpreter::java_lang_math_abs : /* run interpreted */ break;
1318 case Interpreter::java_lang_math_sqrt : /* runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsqrt); not available */ break;
1319 case Interpreter::java_lang_math_log : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); break;
1320 case Interpreter::java_lang_math_log10: runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); break;
1321 case Interpreter::java_lang_math_pow : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); num_args = 2; break;
1322 case Interpreter::java_lang_math_exp : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); break;
1323 case Interpreter::java_lang_math_fmaF : /* run interpreted */ num_args = 3; double_precision = false; break;
1324 case Interpreter::java_lang_math_fmaD : /* run interpreted */ num_args = 3; break;
1325 default: ShouldNotReachHere();
1326 }
1327
1328 // Use normal entry if neither instruction nor runtime call is used.
1329 if (!use_instruction && runtime_entry == NULL) return NULL;
1330
1331 address entry = __ pc();
1332
1333 if (use_instruction) {
1334 switch (kind) {
1335 case Interpreter::java_lang_math_sqrt:
1336 // Can use memory operand directly.
1337 __ z_sqdb(Z_FRET, Interpreter::stackElementSize, Z_esp);
1338 break;
1339 case Interpreter::java_lang_math_abs:
1340 // Load operand from stack.
1341 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize));
1342 __ z_lpdbr(Z_FRET);
1343 break;
1344 case Interpreter::java_lang_math_fmaF:
1345 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3
1346 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); // arg1
1347 __ z_maeb(Z_FRET, Z_FARG2, Address(Z_esp, 2 * Interpreter::stackElementSize));
1348 break;
1349 case Interpreter::java_lang_math_fmaD:
1350 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3
1351 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 5 * Interpreter::stackElementSize)); // arg1
1352 __ z_madb(Z_FRET, Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize));
1353 break;
1354 default: ShouldNotReachHere();
1355 }
1356 } else {
1357 // Load arguments
1358 assert(num_args <= 4, "passed in registers");
1359 if (double_precision) {
1360 int offset = (2 * num_args - 1) * Interpreter::stackElementSize;
1361 for (int i = 0; i < num_args; ++i) {
1362 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset));
1363 offset -= 2 * Interpreter::stackElementSize;
1364 }
1365 } else {
1366 int offset = num_args * Interpreter::stackElementSize;
1367 for (int i = 0; i < num_args; ++i) {
1368 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset));
1369 offset -= Interpreter::stackElementSize;
1370 }
1371 }
1372 // Call runtime
1373 __ save_return_pc(); // Save Z_R14.
1374 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14.
1375
1376 __ call_VM_leaf(runtime_entry);
1377
1378 __ pop_frame();
1379 __ restore_return_pc(); // Restore Z_R14.
1380 }
1381
1382 // Pop c2i arguments (if any) off when we return.
1383 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
1384
1385 __ z_br(Z_R14);
1386
1387 return entry;
1388 }
1389
1390 // Interpreter stub for calling a native method. (asm interpreter).
1391 // This sets up a somewhat different looking stack for calling the
1392 // native method than the typical interpreter frame setup.
1393 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
1394 // Determine code generation flags.
1395 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1396
1397 // Interpreter entry for ordinary Java methods.
1398 //
1399 // Registers alive
1400 // Z_SP - stack pointer
1401 // Z_thread - JavaThread*
1402 // Z_method - callee's method (method to be invoked)
1403 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg.
1404 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter
1405 // and as well by generate_fixed_frame below)
1406 // Z_R14 - return address to caller (call_stub or c2i_adapter)
1407 //
1408 // Registers updated
1409 // Z_SP - stack pointer
1410 // Z_fp - callee's framepointer
1411 // Z_esp - callee's operand stack pointer
1412 // points to the slot above the value on top
1413 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
1414 // Z_tos - integer result, if any
1415 // z_ftos - floating point result, if any
1416 //
1417 // Stack layout at this point:
1418 //
1419 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if
1420 // frame was extended by c2i adapter)
1421 // [outgoing Java arguments] <-- Z_esp
1422 // ...
1423 // PARENT [PARENT_IJAVA_FRAME_ABI]
1424 // ...
1425 //
1426
1427 address entry_point = __ pc();
1428
1429 // Make sure registers are different!
1430 assert_different_registers(Z_thread, Z_method, Z_esp);
1431
1432 BLOCK_COMMENT("native_entry {");
1433
1434 // Make sure method is native and not abstract.
1435 #ifdef ASSERT
1436 address reentry = NULL;
1437 { Label L;
1438 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT);
1439 __ z_btrue(L);
1440 reentry = __ stop_chain_static(reentry, "tried to execute non-native method as native");
1441 __ bind(L);
1442 }
1443 { Label L;
1444 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT);
1445 __ z_bfalse(L);
1446 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract");
1447 __ bind(L);
1448 }
1449 #endif // ASSERT
1450
1451 #ifdef ASSERT
1452 // Save the return PC into the callers frame for assertion in generate_fixed_frame.
1453 __ save_return_pc(Z_R14);
1454 #endif
1455
1456 // Generate the code to allocate the interpreter stack frame.
1457 generate_fixed_frame(true);
1458
1459 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset());
1460 // Since at this point in the method invocation the exception handler
1461 // would try to exit the monitor of synchronized methods which hasn't
1462 // been entered yet, we set the thread local variable
1463 // _do_not_unlock_if_synchronized to true. If any exception was thrown by
1464 // runtime, exception handling i.e. unlock_if_synchronized_method will
1465 // check this thread local flag.
1466 __ z_mvi(do_not_unlock_if_synchronized, true);
1467
1468 // Increment invocation count and check for overflow.
1469 NearLabel invocation_counter_overflow;
1470 if (inc_counter) {
1471 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1472 }
1473
1474 Label continue_after_compile;
1475 __ bind(continue_after_compile);
1476
1477 bang_stack_shadow_pages(true);
1478
1479 // Reset the _do_not_unlock_if_synchronized flag.
1480 __ z_mvi(do_not_unlock_if_synchronized, false);
1481
1482 // Check for synchronized methods.
1483 // This mst happen AFTER invocation_counter check and stack overflow check,
1484 // so method is not locked if overflows.
1485 if (synchronized) {
1486 lock_method();
1487 } else {
1488 // No synchronization necessary.
1489 #ifdef ASSERT
1490 { Label L;
1491 __ get_method(Z_R1_scratch);
1492 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
1493 __ z_bfalse(L);
1494 reentry = __ stop_chain_static(reentry, "method needs synchronization");
1495 __ bind(L);
1496 }
1497 #endif // ASSERT
1498 }
1499
1500 // start execution
1501
1502 // jvmti support
1503 __ notify_method_entry();
1504
1505 //=============================================================================
1506 // Get and call the signature handler.
1507 const Register Rmethod = Z_tmp_2;
1508 const Register signature_handler_entry = Z_tmp_1;
1509 const Register Rresult_handler = Z_tmp_3;
1510 Label call_signature_handler;
1511
1512 assert_different_registers(Z_fp, Rmethod, signature_handler_entry, Rresult_handler);
1513 assert(Rresult_handler->is_nonvolatile(), "Rresult_handler must be in a non-volatile register");
1514
1515 // Reload method.
1516 __ get_method(Rmethod);
1517
1518 // Check for signature handler.
1519 __ load_and_test_long(signature_handler_entry, method2_(Rmethod, signature_handler));
1520 __ z_brne(call_signature_handler);
1521
1522 // Method has never been called. Either generate a specialized
1523 // handler or point to the slow one.
1524 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call),
1525 Rmethod);
1526
1527 // Reload method.
1528 __ get_method(Rmethod);
1529
1530 // Reload signature handler, it must have been created/assigned in the meantime.
1531 __ z_lg(signature_handler_entry, method2_(Rmethod, signature_handler));
1532
1533 __ bind(call_signature_handler);
1534
1535 // We have a TOP_IJAVA_FRAME here, which belongs to us.
1536 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1/*tmp*/);
1537
1538 // Call signature handler and pass locals address in Z_ARG1.
1539 __ z_lgr(Z_ARG1, Z_locals);
1540 __ call_stub(signature_handler_entry);
1541 // Save result handler returned by signature handler.
1542 __ z_lgr(Rresult_handler, Z_RET);
1543
1544 // Reload method (the slow signature handler may block for GC).
1545 __ get_method(Rmethod);
1546
1547 // Pass mirror handle if static call.
1548 {
1549 Label method_is_not_static;
1550 __ testbit(method2_(Rmethod, access_flags), JVM_ACC_STATIC_BIT);
1551 __ z_bfalse(method_is_not_static);
1552 // Get mirror.
1553 __ load_mirror(Z_R1, Rmethod);
1554 // z_ijava_state.oop_temp = pool_holder->klass_part()->java_mirror();
1555 __ z_stg(Z_R1, oop_tmp_offset, Z_fp);
1556 // Pass handle to mirror as 2nd argument to JNI method.
1557 __ add2reg(Z_ARG2, oop_tmp_offset, Z_fp);
1558 __ bind(method_is_not_static);
1559 }
1560
1561 // Pass JNIEnv address as first parameter.
1562 __ add2reg(Z_ARG1, in_bytes(JavaThread::jni_environment_offset()), Z_thread);
1563
1564 // Note: last java frame has been set above already. The pc from there
1565 // is precise enough.
1566
1567 // Get native function entry point before we change the thread state.
1568 __ z_lg(Z_R1/*native_method_entry*/, method2_(Rmethod, native_function));
1569
1570 //=============================================================================
1571 // Transition from _thread_in_Java to _thread_in_native. As soon as
1572 // we make this change the safepoint code needs to be certain that
1573 // the last Java frame we established is good. The pc in that frame
1574 // just need to be near here not an actual return address.
1575 #ifdef ASSERT
1576 {
1577 NearLabel L;
1578 __ mem2reg_opt(Z_R14, Address(Z_thread, JavaThread::thread_state_offset()), false /*32 bits*/);
1579 __ compareU32_and_branch(Z_R14, _thread_in_Java, Assembler::bcondEqual, L);
1580 reentry = __ stop_chain_static(reentry, "Wrong thread state in native stub");
1581 __ bind(L);
1582 }
1583 #endif
1584
1585 // Memory ordering: Z does not reorder store/load with subsequent load. That's strong enough.
1586 __ set_thread_state(_thread_in_native);
1587
1588 //=============================================================================
1589 // Call the native method. Argument registers must not have been
1590 // overwritten since "__ call_stub(signature_handler);" (except for
1591 // ARG1 and ARG2 for static methods).
1592
1593 __ call_c(Z_R1/*native_method_entry*/);
1594
1595 // NOTE: frame::interpreter_frame_result() depends on these stores.
1596 __ z_stg(Z_RET, _z_ijava_state_neg(lresult), Z_fp);
1597 __ freg2mem_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult)));
1598 const Register Rlresult = signature_handler_entry;
1599 assert(Rlresult->is_nonvolatile(), "Rlresult must be in a non-volatile register");
1600 __ z_lgr(Rlresult, Z_RET);
1601
1602 // Z_method may no longer be valid, because of GC.
1603
1604 // Block, if necessary, before resuming in _thread_in_Java state.
1605 // In order for GC to work, don't clear the last_Java_sp until after
1606 // blocking.
1607
1608 //=============================================================================
1609 // Switch thread to "native transition" state before reading the
1610 // synchronization state. This additional state is necessary
1611 // because reading and testing the synchronization state is not
1612 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A,
1613 // in _thread_in_native state, loads _not_synchronized and is
1614 // preempted. VM thread changes sync state to synchronizing and
1615 // suspends threads for GC. Thread A is resumed to finish this
1616 // native method, but doesn't block here since it didn't see any
1617 // synchronization is progress, and escapes.
1618
1619 __ set_thread_state(_thread_in_native_trans);
1620 if (UseMembar) {
1621 __ z_fence();
1622 } else {
1623 // Write serialization page so VM thread can do a pseudo remote
1624 // membar. We use the current thread pointer to calculate a thread
1625 // specific offset to write to within the page. This minimizes bus
1626 // traffic due to cache line collision.
1627 __ serialize_memory(Z_thread, Z_R1, Z_R0);
1628 }
1629 // Now before we return to java we must look for a current safepoint
1630 // (a new safepoint can not start since we entered native_trans).
1631 // We must check here because a current safepoint could be modifying
1632 // the callers registers right this moment.
1633
1634 // Check for safepoint operation in progress and/or pending suspend requests.
1635 {
1636 Label Continue, do_safepoint;
1637 __ safepoint_poll(do_safepoint, Z_R1);
1638 // Check for suspend.
1639 __ load_and_test_int(Z_R0/*suspend_flags*/, thread_(suspend_flags));
1640 __ z_bre(Continue); // 0 -> no flag set -> not suspended
1641 __ bind(do_safepoint);
1642 __ z_lgr(Z_ARG1, Z_thread);
1643 __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
1644 __ bind(Continue);
1645 }
1646
1647 //=============================================================================
1648 // Back in Interpreter Frame.
1649
1650 // We are in thread_in_native_trans here and back in the normal
1651 // interpreter frame. We don't have to do anything special about
1652 // safepoints and we can switch to Java mode anytime we are ready.
1653
1654 // Note: frame::interpreter_frame_result has a dependency on how the
1655 // method result is saved across the call to post_method_exit. For
1656 // native methods it assumes that the non-FPU/non-void result is
1657 // saved in z_ijava_state.lresult and a FPU result in z_ijava_state.fresult. If
1658 // this changes then the interpreter_frame_result implementation
1659 // will need to be updated too.
1660
1661 //=============================================================================
1662 // Back in Java.
1663
1664 // Memory ordering: Z does not reorder store/load with subsequent
1665 // load. That's strong enough.
1666 __ set_thread_state(_thread_in_Java);
1667
1668 __ reset_last_Java_frame();
1669
1670 // We reset the JNI handle block only after unboxing the result; see below.
1671
1672 // The method register is junk from after the thread_in_native transition
1673 // until here. Also can't call_VM until the bcp has been
1674 // restored. Need bcp for throwing exception below so get it now.
1675 __ get_method(Rmethod);
1676
1677 // Restore Z_bcp to have legal interpreter frame,
1678 // i.e., bci == 0 <=> Z_bcp == code_base().
1679 __ z_lg(Z_bcp, Address(Rmethod, Method::const_offset())); // get constMethod
1680 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); // get codebase
1681
1682 if (CheckJNICalls) {
1683 // clear_pending_jni_exception_check
1684 __ clear_mem(Address(Z_thread, JavaThread::pending_jni_exception_check_fn_offset()), sizeof(oop));
1685 }
1686
1687 // Check if the native method returns an oop, and if so, move it
1688 // from the jni handle to z_ijava_state.oop_temp. This is
1689 // necessary, because we reset the jni handle block below.
1690 // NOTE: frame::interpreter_frame_result() depends on this, too.
1691 { NearLabel no_oop_result;
1692 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT));
1693 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_result);
1694 __ resolve_jobject(Rlresult, /* tmp1 */ Rmethod, /* tmp2 */ Z_R1);
1695 __ z_stg(Rlresult, oop_tmp_offset, Z_fp);
1696 __ bind(no_oop_result);
1697 }
1698
1699 // Reset handle block.
1700 __ z_lg(Z_R1/*active_handles*/, thread_(active_handles));
1701 __ clear_mem(Address(Z_R1, JNIHandleBlock::top_offset_in_bytes()), 4);
1702
1703 // Bandle exceptions (exception handling will handle unlocking!).
1704 {
1705 Label L;
1706 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception));
1707 __ z_bre(L);
1708 __ MacroAssembler::call_VM(noreg,
1709 CAST_FROM_FN_PTR(address,
1710 InterpreterRuntime::throw_pending_exception));
1711 __ should_not_reach_here();
1712 __ bind(L);
1713 }
1714
1715 if (synchronized) {
1716 Register Rfirst_monitor = Z_ARG2;
1717 __ add2reg(Rfirst_monitor, -(frame::z_ijava_state_size + (int)sizeof(BasicObjectLock)), Z_fp);
1718 #ifdef ASSERT
1719 NearLabel ok;
1720 __ z_lg(Z_R1, _z_ijava_state_neg(monitors), Z_fp);
1721 __ compareU64_and_branch(Rfirst_monitor, Z_R1, Assembler::bcondEqual, ok);
1722 reentry = __ stop_chain_static(reentry, "native_entry:unlock: inconsistent z_ijava_state.monitors");
1723 __ bind(ok);
1724 #endif
1725 __ unlock_object(Rfirst_monitor);
1726 }
1727
1728 // JVMTI support. Result has already been saved above to the frame.
1729 __ notify_method_exit(true/*native_method*/, ilgl, InterpreterMacroAssembler::NotifyJVMTI);
1730
1731 // Move native method result back into proper registers and return.
1732 // C++ interpreter does not use result handler. So do we need to here? TODO(ZASM): check if correct.
1733 { NearLabel no_oop_or_null;
1734 __ mem2freg_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult)));
1735 __ load_and_test_long(Z_RET, Address(Z_fp, _z_ijava_state_neg(lresult)));
1736 __ z_bre(no_oop_or_null); // No unboxing if the result is NULL.
1737 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT));
1738 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_or_null);
1739 __ z_lg(Z_RET, oop_tmp_offset, Z_fp);
1740 __ verify_oop(Z_RET);
1741 __ bind(no_oop_or_null);
1742 }
1743
1744 // Pop the native method's interpreter frame.
1745 __ pop_interpreter_frame(Z_R14 /*return_pc*/, Z_ARG2/*tmp1*/, Z_ARG3/*tmp2*/);
1746
1747 // Return to caller.
1748 __ z_br(Z_R14);
1749
1750 if (inc_counter) {
1751 // Handle overflow of counter and compile method.
1752 __ bind(invocation_counter_overflow);
1753 generate_counter_overflow(continue_after_compile);
1754 }
1755
1756 BLOCK_COMMENT("} native_entry");
1757
1758 return entry_point;
1759 }
1760
1761 //
1762 // Generic interpreted method entry to template interpreter.
1763 //
1764 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1765 address entry_point = __ pc();
1766
1767 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1768
1769 // Interpreter entry for ordinary Java methods.
1770 //
1771 // Registers alive
1772 // Z_SP - stack pointer
1773 // Z_thread - JavaThread*
1774 // Z_method - callee's method (method to be invoked)
1775 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg.
1776 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter
1777 // and as well by generate_fixed_frame below)
1778 // Z_R14 - return address to caller (call_stub or c2i_adapter)
1779 //
1780 // Registers updated
1781 // Z_SP - stack pointer
1782 // Z_fp - callee's framepointer
1783 // Z_esp - callee's operand stack pointer
1784 // points to the slot above the value on top
1785 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
1786 // Z_tos - integer result, if any
1787 // z_ftos - floating point result, if any
1788 //
1789 //
1790 // stack layout at this point:
1791 //
1792 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if
1793 // frame was extended by c2i adapter)
1794 // [outgoing Java arguments] <-- Z_esp
1795 // ...
1796 // PARENT [PARENT_IJAVA_FRAME_ABI]
1797 // ...
1798 //
1799 // stack layout before dispatching the first bytecode:
1800 //
1801 // F0 [TOP_IJAVA_FRAME_ABI] <-- Z_SP
1802 // [operand stack] <-- Z_esp
1803 // monitor (optional, can grow)
1804 // [IJAVA_STATE]
1805 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_fp (== *Z_SP)
1806 // [F0's locals] <-- Z_locals
1807 // [F1's operand stack]
1808 // [F1's monitors] (optional)
1809 // [IJAVA_STATE]
1810
1811 // Make sure registers are different!
1812 assert_different_registers(Z_thread, Z_method, Z_esp);
1813
1814 BLOCK_COMMENT("normal_entry {");
1815
1816 // Make sure method is not native and not abstract.
1817 // Rethink these assertions - they can be simplified and shared.
1818 #ifdef ASSERT
1819 address reentry = NULL;
1820 { Label L;
1821 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT);
1822 __ z_bfalse(L);
1823 reentry = __ stop_chain_static(reentry, "tried to execute native method as non-native");
1824 __ bind(L);
1825 }
1826 { Label L;
1827 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT);
1828 __ z_bfalse(L);
1829 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract");
1830 __ bind(L);
1831 }
1832 #endif // ASSERT
1833
1834 #ifdef ASSERT
1835 // Save the return PC into the callers frame for assertion in generate_fixed_frame.
1836 __ save_return_pc(Z_R14);
1837 #endif
1838
1839 // Generate the code to allocate the interpreter stack frame.
1840 generate_fixed_frame(false);
1841
1842 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset());
1843 // Since at this point in the method invocation the exception handler
1844 // would try to exit the monitor of synchronized methods which hasn't
1845 // been entered yet, we set the thread local variable
1846 // _do_not_unlock_if_synchronized to true. If any exception was thrown by
1847 // runtime, exception handling i.e. unlock_if_synchronized_method will
1848 // check this thread local flag.
1849 __ z_mvi(do_not_unlock_if_synchronized, true);
1850
1851 __ profile_parameters_type(Z_tmp_2, Z_ARG3, Z_ARG4);
1852
1853 // Increment invocation counter and check for overflow.
1854 //
1855 // Note: checking for negative value instead of overflow so we have a 'sticky'
1856 // overflow test (may be of importance as soon as we have true MT/MP).
1857 NearLabel invocation_counter_overflow;
1858 NearLabel profile_method;
1859 NearLabel profile_method_continue;
1860 NearLabel Lcontinue;
1861 if (inc_counter) {
1862 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1863 if (ProfileInterpreter) {
1864 __ bind(profile_method_continue);
1865 }
1866 }
1867 __ bind(Lcontinue);
1868
1869 bang_stack_shadow_pages(false);
1870
1871 // Reset the _do_not_unlock_if_synchronized flag.
1872 __ z_mvi(do_not_unlock_if_synchronized, false);
1873
1874 // Check for synchronized methods.
1875 // Must happen AFTER invocation_counter check and stack overflow check,
1876 // so method is not locked if overflows.
1877 if (synchronized) {
1878 // Allocate monitor and lock method.
1879 lock_method();
1880 } else {
1881 #ifdef ASSERT
1882 { Label L;
1883 __ get_method(Z_R1_scratch);
1884 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
1885 __ z_bfalse(L);
1886 reentry = __ stop_chain_static(reentry, "method needs synchronization");
1887 __ bind(L);
1888 }
1889 #endif // ASSERT
1890 }
1891
1892 // start execution
1893
1894 #ifdef ASSERT
1895 __ verify_esp(Z_esp, Z_R1_scratch);
1896
1897 __ verify_thread();
1898 #endif
1899
1900 // jvmti support
1901 __ notify_method_entry();
1902
1903 // Start executing instructions.
1904 __ dispatch_next(vtos);
1905 // Dispatch_next does not return.
1906 DEBUG_ONLY(__ should_not_reach_here());
1907
1908 // Invocation counter overflow.
1909 if (inc_counter) {
1910 if (ProfileInterpreter) {
1911 // We have decided to profile this method in the interpreter.
1912 __ bind(profile_method);
1913
1914 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1915 __ set_method_data_pointer_for_bcp();
1916 __ z_bru(profile_method_continue);
1917 }
1918
1919 // Handle invocation counter overflow.
1920 __ bind(invocation_counter_overflow);
1921 generate_counter_overflow(Lcontinue);
1922 }
1923
1924 BLOCK_COMMENT("} normal_entry");
1925
1926 return entry_point;
1927 }
1928
1929
1930 /**
1931 * Method entry for static native methods:
1932 * int java.util.zip.CRC32.update(int crc, int b)
1933 */
1934 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
1935
1936 if (UseCRC32Intrinsics) {
1937 uint64_t entry_off = __ offset();
1938 Label slow_path;
1939
1940 // If we need a safepoint check, generate full interpreter entry.
1941 __ safepoint_poll(slow_path, Z_R1);
1942
1943 BLOCK_COMMENT("CRC32_update {");
1944
1945 // We don't generate local frame and don't align stack because
1946 // we not even call stub code (we generate the code inline)
1947 // and there is no safepoint on this path.
1948
1949 // Load java parameters.
1950 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
1951 const Register argP = Z_esp;
1952 const Register crc = Z_ARG1; // crc value
1953 const Register data = Z_ARG2; // address of java byte value (kernel_crc32 needs address)
1954 const Register dataLen = Z_ARG3; // source data len (1 byte). Not used because calling the single-byte emitter.
1955 const Register table = Z_ARG4; // address of crc32 table
1956
1957 // Arguments are reversed on java expression stack.
1958 __ z_la(data, 3+1*wordSize, argP); // byte value (stack address).
1959 // Being passed as an int, the single byte is at offset +3.
1960 __ z_llgf(crc, 2 * wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register.
1961
1962 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table);
1963 __ kernel_crc32_singleByte(crc, data, dataLen, table, Z_R1, true);
1964
1965 // Restore caller sp for c2i case.
1966 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
1967
1968 __ z_br(Z_R14);
1969
1970 BLOCK_COMMENT("} CRC32_update");
1971
1972 // Use a previously generated vanilla native entry as the slow path.
1973 BIND(slow_path);
1974 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1);
1975 return __ addr_at(entry_off);
1976 }
1977
1978 return NULL;
1979 }
1980
1981
1982 /**
1983 * Method entry for static native methods:
1984 * int java.util.zip.CRC32.updateBytes( int crc, byte[] b, int off, int len)
1985 * int java.util.zip.CRC32.updateByteBuffer(int crc, long* buf, int off, int len)
1986 */
1987 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
1988
1989 if (UseCRC32Intrinsics) {
1990 uint64_t entry_off = __ offset();
1991 Label slow_path;
1992
1993 // If we need a safepoint check, generate full interpreter entry.
1994 __ safepoint_poll(slow_path, Z_R1);
1995
1996 // We don't generate local frame and don't align stack because
1997 // we call stub code and there is no safepoint on this path.
1998
1999 // Load parameters.
2000 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
2001 const Register argP = Z_esp;
2002 const Register crc = Z_ARG1; // crc value
2003 const Register data = Z_ARG2; // address of java byte array
2004 const Register dataLen = Z_ARG3; // source data len
2005 const Register table = Z_ARG4; // address of crc32 table
2006 const Register t0 = Z_R10; // work reg for kernel* emitters
2007 const Register t1 = Z_R11; // work reg for kernel* emitters
2008 const Register t2 = Z_R12; // work reg for kernel* emitters
2009 const Register t3 = Z_R13; // work reg for kernel* emitters
2010
2011 // Arguments are reversed on java expression stack.
2012 // Calculate address of start element.
2013 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { // Used for "updateByteBuffer direct".
2014 // crc @ (SP + 5W) (32bit)
2015 // buf @ (SP + 3W) (64bit ptr to long array)
2016 // off @ (SP + 2W) (32bit)
2017 // dataLen @ (SP + 1W) (32bit)
2018 // data = buf + off
2019 BLOCK_COMMENT("CRC32_updateByteBuffer {");
2020 __ z_llgf(crc, 5*wordSize, argP); // current crc state
2021 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2022 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2023 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process
2024 } else { // Used for "updateBytes update".
2025 // crc @ (SP + 4W) (32bit)
2026 // buf @ (SP + 3W) (64bit ptr to byte array)
2027 // off @ (SP + 2W) (32bit)
2028 // dataLen @ (SP + 1W) (32bit)
2029 // data = buf + off + base_offset
2030 BLOCK_COMMENT("CRC32_updateBytes {");
2031 __ z_llgf(crc, 4*wordSize, argP); // current crc state
2032 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2033 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2034 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process
2035 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
2036 }
2037
2038 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table);
2039
2040 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers.
2041 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers.
2042 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, true);
2043 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack.
2044
2045 // Restore caller sp for c2i case.
2046 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
2047
2048 __ z_br(Z_R14);
2049
2050 BLOCK_COMMENT("} CRC32_update{Bytes|ByteBuffer}");
2051
2052 // Use a previously generated vanilla native entry as the slow path.
2053 BIND(slow_path);
2054 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1);
2055 return __ addr_at(entry_off);
2056 }
2057
2058 return NULL;
2059 }
2060
2061
2062 /**
2063 * Method entry for intrinsic-candidate (non-native) methods:
2064 * int java.util.zip.CRC32C.updateBytes( int crc, byte[] b, int off, int end)
2065 * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long* buf, int off, int end)
2066 * Unlike CRC32, CRC32C does not have any methods marked as native
2067 * CRC32C also uses an "end" variable instead of the length variable CRC32 uses
2068 */
2069 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
2070
2071 if (UseCRC32CIntrinsics) {
2072 uint64_t entry_off = __ offset();
2073
2074 // We don't generate local frame and don't align stack because
2075 // we call stub code and there is no safepoint on this path.
2076
2077 // Load parameters.
2078 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
2079 const Register argP = Z_esp;
2080 const Register crc = Z_ARG1; // crc value
2081 const Register data = Z_ARG2; // address of java byte array
2082 const Register dataLen = Z_ARG3; // source data len
2083 const Register table = Z_ARG4; // address of crc32 table
2084 const Register t0 = Z_R10; // work reg for kernel* emitters
2085 const Register t1 = Z_R11; // work reg for kernel* emitters
2086 const Register t2 = Z_R12; // work reg for kernel* emitters
2087 const Register t3 = Z_R13; // work reg for kernel* emitters
2088
2089 // Arguments are reversed on java expression stack.
2090 // Calculate address of start element.
2091 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { // Used for "updateByteBuffer direct".
2092 // crc @ (SP + 5W) (32bit)
2093 // buf @ (SP + 3W) (64bit ptr to long array)
2094 // off @ (SP + 2W) (32bit)
2095 // dataLen @ (SP + 1W) (32bit)
2096 // data = buf + off
2097 BLOCK_COMMENT("CRC32C_updateDirectByteBuffer {");
2098 __ z_llgf(crc, 5*wordSize, argP); // current crc state
2099 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2100 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2101 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as
2102 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset)
2103 } else { // Used for "updateBytes update".
2104 // crc @ (SP + 4W) (32bit)
2105 // buf @ (SP + 3W) (64bit ptr to byte array)
2106 // off @ (SP + 2W) (32bit)
2107 // dataLen @ (SP + 1W) (32bit)
2108 // data = buf + off + base_offset
2109 BLOCK_COMMENT("CRC32C_updateBytes {");
2110 __ z_llgf(crc, 4*wordSize, argP); // current crc state
2111 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2112 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2113 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as
2114 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset)
2115 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
2116 }
2117
2118 StubRoutines::zarch::generate_load_crc32c_table_addr(_masm, table);
2119
2120 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers.
2121 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers.
2122 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, false);
2123 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack.
2124
2125 // Restore caller sp for c2i case.
2126 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
2127
2128 __ z_br(Z_R14);
2129
2130 BLOCK_COMMENT("} CRC32C_update{Bytes|DirectByteBuffer}");
2131 return __ addr_at(entry_off);
2132 }
2133
2134 return NULL;
2135 }
2136
2137 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
2138 // Quick & dirty stack overflow checking: bang the stack & handle trap.
2139 // Note that we do the banging after the frame is setup, since the exception
2140 // handling code expects to find a valid interpreter frame on the stack.
2141 // Doing the banging earlier fails if the caller frame is not an interpreter
2142 // frame.
2143 // (Also, the exception throwing code expects to unlock any synchronized
2144 // method receiver, so do the banging after locking the receiver.)
2145
2146 // Bang each page in the shadow zone. We can't assume it's been done for
2147 // an interpreter frame with greater than a page of locals, so each page
2148 // needs to be checked. Only true for non-native. For native, we only bang the last page.
2149 if (UseStackBanging) {
2150 const int page_size = os::vm_page_size();
2151 const int n_shadow_pages = (int)(JavaThread::stack_shadow_zone_size()/page_size);
2152 const int start_page_num = native_call ? n_shadow_pages : 1;
2153 for (int pages = start_page_num; pages <= n_shadow_pages; pages++) {
2154 __ bang_stack_with_offset(pages*page_size);
2155 }
2156 }
2157 }
2158
2159 //-----------------------------------------------------------------------------
2160 // Exceptions
2161
2162 void TemplateInterpreterGenerator::generate_throw_exception() {
2163
2164 BLOCK_COMMENT("throw_exception {");
2165
2166 // Entry point in previous activation (i.e., if the caller was interpreted).
2167 Interpreter::_rethrow_exception_entry = __ pc();
2168 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Frame accessors use Z_fp.
2169 // Z_ARG1 (==Z_tos): exception
2170 // Z_ARG2 : Return address/pc that threw exception.
2171 __ restore_bcp(); // R13 points to call/send.
2172 __ restore_locals();
2173
2174 // Fallthrough, no need to restore Z_esp.
2175
2176 // Entry point for exceptions thrown within interpreter code.
2177 Interpreter::_throw_exception_entry = __ pc();
2178 // Expression stack is undefined here.
2179 // Z_ARG1 (==Z_tos): exception
2180 // Z_bcp: exception bcp
2181 __ verify_oop(Z_ARG1);
2182 __ z_lgr(Z_ARG2, Z_ARG1);
2183
2184 // Expression stack must be empty before entering the VM in case of
2185 // an exception.
2186 __ empty_expression_stack();
2187 // Find exception handler address and preserve exception oop.
2188 const Register Rpreserved_exc_oop = Z_tmp_1;
2189 __ call_VM(Rpreserved_exc_oop,
2190 CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception),
2191 Z_ARG2);
2192 // Z_RET: exception handler entry point
2193 // Z_bcp: bcp for exception handler
2194 __ push_ptr(Rpreserved_exc_oop); // Push exception which is now the only value on the stack.
2195 __ z_br(Z_RET); // Jump to exception handler (may be _remove_activation_entry!).
2196
2197 // If the exception is not handled in the current frame the frame is
2198 // removed and the exception is rethrown (i.e. exception
2199 // continuation is _rethrow_exception).
2200 //
2201 // Note: At this point the bci is still the bci for the instruction
2202 // which caused the exception and the expression stack is
2203 // empty. Thus, for any VM calls at this point, GC will find a legal
2204 // oop map (with empty expression stack).
2205
2206 //
2207 // JVMTI PopFrame support
2208 //
2209
2210 Interpreter::_remove_activation_preserving_args_entry = __ pc();
2211 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP);
2212 __ empty_expression_stack();
2213 // Set the popframe_processing bit in pending_popframe_condition
2214 // indicating that we are currently handling popframe, so that
2215 // call_VMs that may happen later do not trigger new popframe
2216 // handling cycles.
2217 __ load_sized_value(Z_tmp_1, Address(Z_thread, JavaThread::popframe_condition_offset()), 4, false /*signed*/);
2218 __ z_oill(Z_tmp_1, JavaThread::popframe_processing_bit);
2219 __ z_sty(Z_tmp_1, thread_(popframe_condition));
2220
2221 {
2222 // Check to see whether we are returning to a deoptimized frame.
2223 // (The PopFrame call ensures that the caller of the popped frame is
2224 // either interpreted or compiled and deoptimizes it if compiled.)
2225 // In this case, we can't call dispatch_next() after the frame is
2226 // popped, but instead must save the incoming arguments and restore
2227 // them after deoptimization has occurred.
2228 //
2229 // Note that we don't compare the return PC against the
2230 // deoptimization blob's unpack entry because of the presence of
2231 // adapter frames in C2.
2232 NearLabel caller_not_deoptimized;
2233 __ z_lg(Z_ARG1, _z_parent_ijava_frame_abi(return_pc), Z_fp);
2234 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), Z_ARG1);
2235 __ compareU64_and_branch(Z_RET, (intptr_t)0, Assembler::bcondNotEqual, caller_not_deoptimized);
2236
2237 // Compute size of arguments for saving when returning to
2238 // deoptimized caller.
2239 __ get_method(Z_ARG2);
2240 __ z_lg(Z_ARG2, Address(Z_ARG2, Method::const_offset()));
2241 __ z_llgh(Z_ARG2, Address(Z_ARG2, ConstMethod::size_of_parameters_offset()));
2242 __ z_sllg(Z_ARG2, Z_ARG2, Interpreter::logStackElementSize); // slots 2 bytes
2243 __ restore_locals();
2244 // Compute address of args to be saved.
2245 __ z_lgr(Z_ARG3, Z_locals);
2246 __ z_slgr(Z_ARG3, Z_ARG2);
2247 __ add2reg(Z_ARG3, wordSize);
2248 // Save these arguments.
2249 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args),
2250 Z_thread, Z_ARG2, Z_ARG3);
2251
2252 __ remove_activation(vtos, Z_R14,
2253 /* throw_monitor_exception */ false,
2254 /* install_monitor_exception */ false,
2255 /* notify_jvmdi */ false);
2256
2257 // Inform deoptimization that it is responsible for restoring
2258 // these arguments.
2259 __ store_const(thread_(popframe_condition),
2260 JavaThread::popframe_force_deopt_reexecution_bit,
2261 Z_tmp_1, false);
2262
2263 // Continue in deoptimization handler.
2264 __ z_br(Z_R14);
2265
2266 __ bind(caller_not_deoptimized);
2267 }
2268
2269 // Clear the popframe condition flag.
2270 __ clear_mem(thread_(popframe_condition), sizeof(int));
2271
2272 __ remove_activation(vtos,
2273 noreg, // Retaddr is not used.
2274 false, // throw_monitor_exception
2275 false, // install_monitor_exception
2276 false); // notify_jvmdi
2277 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
2278 __ restore_bcp();
2279 __ restore_locals();
2280 __ restore_esp();
2281 // The method data pointer was incremented already during
2282 // call profiling. We have to restore the mdp for the current bcp.
2283 if (ProfileInterpreter) {
2284 __ set_method_data_pointer_for_bcp();
2285 }
2286 #if INCLUDE_JVMTI
2287 {
2288 Label L_done;
2289
2290 __ z_cli(0, Z_bcp, Bytecodes::_invokestatic);
2291 __ z_brc(Assembler::bcondNotEqual, L_done);
2292
2293 // The member name argument must be restored if _invokestatic is
2294 // re-executed after a PopFrame call. Detect such a case in the
2295 // InterpreterRuntime function and return the member name
2296 // argument, or NULL.
2297 __ z_lg(Z_ARG2, Address(Z_locals));
2298 __ get_method(Z_ARG3);
2299 __ call_VM(Z_tmp_1,
2300 CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null),
2301 Z_ARG2, Z_ARG3, Z_bcp);
2302
2303 __ z_ltgr(Z_tmp_1, Z_tmp_1);
2304 __ z_brc(Assembler::bcondEqual, L_done);
2305
2306 __ z_stg(Z_tmp_1, Address(Z_esp, wordSize));
2307 __ bind(L_done);
2308 }
2309 #endif // INCLUDE_JVMTI
2310 __ dispatch_next(vtos);
2311 // End of PopFrame support.
2312 Interpreter::_remove_activation_entry = __ pc();
2313
2314 // In between activations - previous activation type unknown yet
2315 // compute continuation point - the continuation point expects the
2316 // following registers set up:
2317 //
2318 // Z_ARG1 (==Z_tos): exception
2319 // Z_ARG2 : return address/pc that threw exception
2320
2321 Register return_pc = Z_tmp_1;
2322 Register handler = Z_tmp_2;
2323 assert(return_pc->is_nonvolatile(), "use non-volatile reg. to preserve exception pc");
2324 assert(handler->is_nonvolatile(), "use non-volatile reg. to handler pc");
2325 __ asm_assert_ijava_state_magic(return_pc/*tmp*/); // The top frame should be an interpreter frame.
2326 __ z_lg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_fp);
2327
2328 // Moved removing the activation after VM call, because the new top
2329 // frame does not necessarily have the z_abi_160 required for a VM
2330 // call (e.g. if it is compiled).
2331
2332 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
2333 SharedRuntime::exception_handler_for_return_address),
2334 Z_thread, return_pc);
2335 __ z_lgr(handler, Z_RET); // Save exception handler.
2336
2337 // Preserve exception over this code sequence.
2338 __ pop_ptr(Z_ARG1);
2339 __ set_vm_result(Z_ARG1);
2340 // Remove the activation (without doing throws on illegalMonitorExceptions).
2341 __ remove_activation(vtos, noreg/*ret.pc already loaded*/, false/*throw exc*/, true/*install exc*/, false/*notify jvmti*/);
2342 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
2343
2344 __ get_vm_result(Z_ARG1); // Restore exception.
2345 __ verify_oop(Z_ARG1);
2346 __ z_lgr(Z_ARG2, return_pc); // Restore return address.
2347
2348 #ifdef ASSERT
2349 // The return_pc in the new top frame is dead... at least that's my
2350 // current understanding. To assert this I overwrite it.
2351 // Note: for compiled frames the handler is the deopt blob
2352 // which writes Z_ARG2 into the return_pc slot.
2353 __ load_const_optimized(return_pc, 0xb00b1);
2354 __ z_stg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_SP);
2355 #endif
2356
2357 // Z_ARG1 (==Z_tos): exception
2358 // Z_ARG2 : return address/pc that threw exception
2359
2360 // Note that an "issuing PC" is actually the next PC after the call.
2361 __ z_br(handler); // Jump to exception handler of caller.
2362
2363 BLOCK_COMMENT("} throw_exception");
2364 }
2365
2366 //
2367 // JVMTI ForceEarlyReturn support
2368 //
2369 address TemplateInterpreterGenerator::generate_earlyret_entry_for (TosState state) {
2370 address entry = __ pc();
2371
2372 BLOCK_COMMENT("earlyret_entry {");
2373
2374 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP);
2375 __ restore_bcp();
2376 __ restore_locals();
2377 __ restore_esp();
2378 __ empty_expression_stack();
2379 __ load_earlyret_value(state);
2380
2381 Register RjvmtiState = Z_tmp_1;
2382 __ z_lg(RjvmtiState, thread_(jvmti_thread_state));
2383 __ store_const(Address(RjvmtiState, JvmtiThreadState::earlyret_state_offset()),
2384 JvmtiThreadState::earlyret_inactive, 4, 4, Z_R0_scratch);
2385
2386 if (state == itos) {
2387 // Narrow result if state is itos but result type is smaller.
2388 // Need to narrow in the return bytecode rather than in generate_return_entry
2389 // since compiled code callers expect the result to already be narrowed.
2390 __ narrow(Z_tos, Z_tmp_1); /* fall through */
2391 }
2392 __ remove_activation(state,
2393 Z_tmp_1, // retaddr
2394 false, // throw_monitor_exception
2395 false, // install_monitor_exception
2396 true); // notify_jvmdi
2397 __ z_br(Z_tmp_1);
2398
2399 BLOCK_COMMENT("} earlyret_entry");
2400
2401 return entry;
2402 }
2403
2404 //-----------------------------------------------------------------------------
2405 // Helper for vtos entry point generation.
2406
2407 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
2408 address& bep,
2409 address& cep,
2410 address& sep,
2411 address& aep,
2412 address& iep,
2413 address& lep,
2414 address& fep,
2415 address& dep,
2416 address& vep) {
2417 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
2418 Label L;
2419 aep = __ pc(); __ push_ptr(); __ z_bru(L);
2420 fep = __ pc(); __ push_f(); __ z_bru(L);
2421 dep = __ pc(); __ push_d(); __ z_bru(L);
2422 lep = __ pc(); __ push_l(); __ z_bru(L);
2423 bep = cep = sep =
2424 iep = __ pc(); __ push_i();
2425 vep = __ pc();
2426 __ bind(L);
2427 generate_and_dispatch(t);
2428 }
2429
2430 //-----------------------------------------------------------------------------
2431
2432 #ifndef PRODUCT
2433 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
2434 address entry = __ pc();
2435 NearLabel counter_below_trace_threshold;
2436
2437 if (TraceBytecodesAt > 0) {
2438 // Skip runtime call, if the trace threshold is not yet reached.
2439 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value);
2440 __ load_absolute_address(Z_tmp_2, (address)&TraceBytecodesAt);
2441 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/);
2442 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/);
2443 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, counter_below_trace_threshold);
2444 }
2445
2446 int offset2 = state == ltos || state == dtos ? 2 : 1;
2447
2448 __ push(state);
2449 // Preserved return pointer is in Z_R14.
2450 // InterpreterRuntime::trace_bytecode() preserved and returns the value passed as second argument.
2451 __ z_lgr(Z_ARG2, Z_R14);
2452 __ z_lg(Z_ARG3, Address(Z_esp, Interpreter::expr_offset_in_bytes(0)));
2453 if (WizardMode) {
2454 __ z_lgr(Z_ARG4, Z_esp); // Trace Z_esp in WizardMode.
2455 } else {
2456 __ z_lg(Z_ARG4, Address(Z_esp, Interpreter::expr_offset_in_bytes(offset2)));
2457 }
2458 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), Z_ARG2, Z_ARG3, Z_ARG4);
2459 __ z_lgr(Z_R14, Z_RET); // Estore return address (see above).
2460 __ pop(state);
2461
2462 __ bind(counter_below_trace_threshold);
2463 __ z_br(Z_R14); // return
2464
2465 return entry;
2466 }
2467
2468 // Make feasible for old CPUs.
2469 void TemplateInterpreterGenerator::count_bytecode() {
2470 __ load_absolute_address(Z_R1_scratch, (address) &BytecodeCounter::_counter_value);
2471 __ add2mem_32(Address(Z_R1_scratch), 1, Z_R0_scratch);
2472 }
2473
2474 void TemplateInterpreterGenerator::histogram_bytecode(Template * t) {
2475 __ load_absolute_address(Z_R1_scratch, (address)&BytecodeHistogram::_counters[ t->bytecode() ]);
2476 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1);
2477 }
2478
2479 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template * t) {
2480 Address index_addr(Z_tmp_1, (intptr_t) 0);
2481 Register index = Z_tmp_2;
2482
2483 // Load previous index.
2484 __ load_absolute_address(Z_tmp_1, (address) &BytecodePairHistogram::_index);
2485 __ mem2reg_opt(index, index_addr, false);
2486
2487 // Mask with current bytecode and store as new previous index.
2488 __ z_srl(index, BytecodePairHistogram::log2_number_of_codes);
2489 __ load_const_optimized(Z_R0_scratch,
2490 (int)t->bytecode() << BytecodePairHistogram::log2_number_of_codes);
2491 __ z_or(index, Z_R0_scratch);
2492 __ reg2mem_opt(index, index_addr, false);
2493
2494 // Load counter array's address.
2495 __ z_lgfr(index, index); // Sign extend for addressing.
2496 __ z_sllg(index, index, LogBytesPerInt); // index2bytes
2497 __ load_absolute_address(Z_R1_scratch,
2498 (address) &BytecodePairHistogram::_counters);
2499 // Add index and increment counter.
2500 __ z_agr(Z_R1_scratch, index);
2501 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1);
2502 }
2503
2504 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
2505 // Call a little run-time stub to avoid blow-up for each bytecode.
2506 // The run-time runtime saves the right registers, depending on
2507 // the tosca in-state for the given template.
2508 address entry = Interpreter::trace_code(t->tos_in());
2509 guarantee(entry != NULL, "entry must have been generated");
2510 __ call_stub(entry);
2511 }
2512
2513 void TemplateInterpreterGenerator::stop_interpreter_at() {
2514 NearLabel L;
2515
2516 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value);
2517 __ load_absolute_address(Z_tmp_2, (address)&StopInterpreterAt);
2518 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/);
2519 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/);
2520 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, L);
2521 assert(Z_tmp_1->is_nonvolatile(), "must be nonvolatile to preserve Z_tos");
2522 assert(Z_F8->is_nonvolatile(), "must be nonvolatile to preserve Z_ftos");
2523 __ z_lgr(Z_tmp_1, Z_tos); // Save tos.
2524 __ z_lgr(Z_tmp_2, Z_bytecode); // Save Z_bytecode.
2525 __ z_ldr(Z_F8, Z_ftos); // Save ftos.
2526 // Use -XX:StopInterpreterAt=<num> to set the limit
2527 // and break at breakpoint().
2528 __ call_VM(noreg, CAST_FROM_FN_PTR(address, breakpoint), false);
2529 __ z_lgr(Z_tos, Z_tmp_1); // Restore tos.
2530 __ z_lgr(Z_bytecode, Z_tmp_2); // Save Z_bytecode.
2531 __ z_ldr(Z_ftos, Z_F8); // Restore ftos.
2532 __ bind(L);
2533 }
2534
2535 #endif // !PRODUCT