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_AbstractMethodError), Z_thread);
462
463 __ pop_frame();
464 __ restore_return_pc(); // Restore Z_R14.
465 __ reset_last_Java_frame();
466
467 // Restore caller sp for c2i case.
468 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
469
470 // branch to SharedRuntime::generate_forward_exception() which handles all possible callers,
471 // i.e. call stub, compiled method, interpreted method.
472 __ load_absolute_address(Z_tmp_1, StubRoutines::forward_exception_entry());
473 __ z_br(Z_tmp_1);
474
475 BLOCK_COMMENT("} abstract_entry");
476
477 return __ addr_at(entry_offset);
478 }
479
480 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
481 #if INCLUDE_ALL_GCS
482 if (UseG1GC) {
483 // Inputs:
484 // Z_ARG1 - receiver
485 //
486 // What we do:
487 // - Load the referent field address.
488 // - Load the value in the referent field.
489 // - Pass that value to the pre-barrier.
490 //
491 // In the case of G1 this will record the value of the
492 // referent in an SATB buffer if marking is active.
493 // This will cause concurrent marking to mark the referent
494 // field as live.
495
496 Register scratch1 = Z_tmp_2;
497 Register scratch2 = Z_tmp_3;
498 Register pre_val = Z_RET; // return value
499 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
500 Register Rargp = Z_esp;
501
502 Label slow_path;
503 address entry = __ pc();
504
505 const int referent_offset = java_lang_ref_Reference::referent_offset;
506 guarantee(referent_offset > 0, "referent offset not initialized");
507
508 BLOCK_COMMENT("Reference_get {");
509
510 // If the receiver is null then it is OK to jump to the slow path.
511 __ load_and_test_long(pre_val, Address(Rargp, Interpreter::stackElementSize)); // Get receiver.
512 __ z_bre(slow_path);
513
514 // Load the value of the referent field.
515 __ load_heap_oop(pre_val, referent_offset, pre_val);
516
517 // Restore caller sp for c2i case.
518 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
519
520 // Generate the G1 pre-barrier code to log the value of
521 // the referent field in an SATB buffer.
522 // Note:
523 // With these parameters the write_barrier_pre does not
524 // generate instructions to load the previous value.
525 __ g1_write_barrier_pre(noreg, // obj
526 noreg, // offset
527 pre_val, // pre_val
528 noreg, // no new val to preserve
529 scratch1, // tmp
530 scratch2, // tmp
531 true); // pre_val_needed
532
533 __ z_br(Z_R14);
534
535 // Branch to previously generated regular method entry.
536 __ bind(slow_path);
537
538 address meth_entry = Interpreter::entry_for_kind(Interpreter::zerolocals);
539 __ jump_to_entry(meth_entry, Z_R1);
540
541 BLOCK_COMMENT("} Reference_get");
542
543 return entry;
544 }
545 #endif // INCLUDE_ALL_GCS
546
547 return NULL;
548 }
549
550 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
551 address entry = __ pc();
552
553 DEBUG_ONLY(__ verify_esp(Z_esp, Z_ARG5));
554
555 // Restore bcp under the assumption that the current frame is still
556 // interpreted.
557 __ restore_bcp();
558
559 // Expression stack must be empty before entering the VM if an
560 // exception happened.
561 __ empty_expression_stack();
562 // Throw exception.
563 __ call_VM(noreg,
564 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
565 return entry;
566 }
567
568 //
569 // Args:
570 // Z_ARG3: aberrant index
571 //
572 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char * name) {
573 address entry = __ pc();
574 address excp = CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException);
575
576 // Expression stack must be empty before entering the VM if an
577 // exception happened.
578 __ empty_expression_stack();
579
580 // Setup parameters.
581 // Leave out the name and use register for array to create more detailed exceptions.
582 __ load_absolute_address(Z_ARG2, (address) name);
583 __ call_VM(noreg, excp, Z_ARG2, Z_ARG3);
584 return entry;
585 }
586
587 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
588 address entry = __ pc();
589
590 // Object is at TOS.
591 __ pop_ptr(Z_ARG2);
592
593 // Expression stack must be empty before entering the VM if an
594 // exception happened.
595 __ empty_expression_stack();
596
597 __ call_VM(Z_ARG1,
598 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException),
599 Z_ARG2);
600
601 DEBUG_ONLY(__ should_not_reach_here();)
602
603 return entry;
604 }
605
606 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
607 assert(!pass_oop || message == NULL, "either oop or message but not both");
608 address entry = __ pc();
609
610 BLOCK_COMMENT("exception_handler_common {");
611
612 // Expression stack must be empty before entering the VM if an
613 // exception happened.
614 __ empty_expression_stack();
615 if (name != NULL) {
616 __ load_absolute_address(Z_ARG2, (address)name);
617 } else {
618 __ clear_reg(Z_ARG2, true, false);
619 }
620
621 if (pass_oop) {
622 __ call_VM(Z_tos,
623 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception),
624 Z_ARG2, Z_tos /*object (see TT::aastore())*/);
625 } else {
626 if (message != NULL) {
627 __ load_absolute_address(Z_ARG3, (address)message);
628 } else {
629 __ clear_reg(Z_ARG3, true, false);
630 }
631 __ call_VM(Z_tos,
632 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
633 Z_ARG2, Z_ARG3);
634 }
635 // Throw exception.
636 __ load_absolute_address(Z_R1_scratch, Interpreter::throw_exception_entry());
637 __ z_br(Z_R1_scratch);
638
639 BLOCK_COMMENT("} exception_handler_common");
640
641 return entry;
642 }
643
644 address TemplateInterpreterGenerator::generate_return_entry_for (TosState state, int step, size_t index_size) {
645 address entry = __ pc();
646
647 BLOCK_COMMENT("return_entry {");
648
649 // Pop i2c extension or revert top-2-parent-resize done by interpreted callees.
650 Register sp_before_i2c_extension = Z_bcp;
651 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
652 __ z_lg(sp_before_i2c_extension, Address(Z_fp, _z_ijava_state_neg(top_frame_sp)));
653 __ resize_frame_absolute(sp_before_i2c_extension, Z_locals/*tmp*/, true/*load_fp*/);
654
655 // TODO(ZASM): necessary??
656 // // and NULL it as marker that esp is now tos until next java call
657 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
658
659 __ restore_bcp();
660 __ restore_locals();
661 __ restore_esp();
662
663 if (state == atos) {
664 __ profile_return_type(Z_tmp_1, Z_tos, Z_tmp_2);
665 }
666
667 Register cache = Z_tmp_1;
668 Register size = Z_tmp_1;
669 Register offset = Z_tmp_2;
670 const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +
671 ConstantPoolCacheEntry::flags_offset());
672 __ get_cache_and_index_at_bcp(cache, offset, 1, index_size);
673
674 // #args is in rightmost byte of the _flags field.
675 __ z_llgc(size, Address(cache, offset, flags_offset+(sizeof(size_t)-1)));
676 __ z_sllg(size, size, Interpreter::logStackElementSize); // Each argument size in bytes.
677 __ z_agr(Z_esp, size); // Pop arguments.
678
679 __ check_and_handle_popframe(Z_thread);
680 __ check_and_handle_earlyret(Z_thread);
681
682 __ dispatch_next(state, step);
683
684 BLOCK_COMMENT("} return_entry");
685
686 return entry;
687 }
688
689 address TemplateInterpreterGenerator::generate_deopt_entry_for (TosState state,
690 int step) {
691 address entry = __ pc();
692
693 BLOCK_COMMENT("deopt_entry {");
694
695 // TODO(ZASM): necessary? NULL last_sp until next java call
696 // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
697 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
698 __ restore_bcp();
699 __ restore_locals();
700 __ restore_esp();
701
702 // Handle exceptions.
703 {
704 Label L;
705 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception));
706 __ z_bre(L);
707 __ call_VM(noreg,
708 CAST_FROM_FN_PTR(address,
709 InterpreterRuntime::throw_pending_exception));
710 __ should_not_reach_here();
711 __ bind(L);
712 }
713 __ dispatch_next(state, step);
714
715 BLOCK_COMMENT("} deopt_entry");
716
717 return entry;
718 }
719
720 address TemplateInterpreterGenerator::generate_safept_entry_for (TosState state,
721 address runtime_entry) {
722 address entry = __ pc();
723 __ push(state);
724 __ call_VM(noreg, runtime_entry);
725 __ dispatch_via(vtos, Interpreter::_normal_table.table_for (vtos));
726 return entry;
727 }
728
729 //
730 // Helpers for commoning out cases in the various type of method entries.
731 //
732
733 // Increment invocation count & check for overflow.
734 //
735 // Note: checking for negative value instead of overflow
736 // so we have a 'sticky' overflow test.
737 //
738 // Z_ARG2: method (see generate_fixed_frame())
739 //
740 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
741 Label done;
742 Register method = Z_ARG2; // Generate_fixed_frame() copies Z_method into Z_ARG2.
743 Register m_counters = Z_ARG4;
744
745 BLOCK_COMMENT("counter_incr {");
746
747 // Note: In tiered we increment either counters in method or in MDO depending
748 // if we are profiling or not.
749 if (TieredCompilation) {
750 int increment = InvocationCounter::count_increment;
751 if (ProfileInterpreter) {
752 NearLabel no_mdo;
753 Register mdo = m_counters;
754 // Are we profiling?
755 __ load_and_test_long(mdo, method2_(method, method_data));
756 __ branch_optimized(Assembler::bcondZero, no_mdo);
757 // Increment counter in the MDO.
758 const Address mdo_invocation_counter(mdo, MethodData::invocation_counter_offset() +
759 InvocationCounter::counter_offset());
760 const Address mask(mdo, MethodData::invoke_mask_offset());
761 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask,
762 Z_R1_scratch, false, Assembler::bcondZero,
763 overflow);
764 __ z_bru(done);
765 __ bind(no_mdo);
766 }
767
768 // Increment counter in MethodCounters.
769 const Address invocation_counter(m_counters,
770 MethodCounters::invocation_counter_offset() +
771 InvocationCounter::counter_offset());
772 // Get address of MethodCounters object.
773 __ get_method_counters(method, m_counters, done);
774 const Address mask(m_counters, MethodCounters::invoke_mask_offset());
775 __ increment_mask_and_jump(invocation_counter,
776 increment, mask,
777 Z_R1_scratch, false, Assembler::bcondZero,
778 overflow);
779 } else {
780 Register counter_sum = Z_ARG3; // The result of this piece of code.
781 Register tmp = Z_R1_scratch;
782 #ifdef ASSERT
783 {
784 NearLabel ok;
785 __ get_method(tmp);
786 __ compare64_and_branch(method, tmp, Assembler::bcondEqual, ok);
787 __ z_illtrap(0x66);
788 __ bind(ok);
789 }
790 #endif
791
792 // Get address of MethodCounters object.
793 __ get_method_counters(method, m_counters, done);
794 // Update standard invocation counters.
795 __ increment_invocation_counter(m_counters, counter_sum);
796 if (ProfileInterpreter) {
797 __ add2mem_32(Address(m_counters, MethodCounters::interpreter_invocation_counter_offset()), 1, tmp);
798 if (profile_method != NULL) {
799 const Address profile_limit(m_counters, MethodCounters::interpreter_profile_limit_offset());
800 __ z_cl(counter_sum, profile_limit);
801 __ branch_optimized(Assembler::bcondLow, *profile_method_continue);
802 // If no method data exists, go to profile_method.
803 __ test_method_data_pointer(tmp, *profile_method);
804 }
805 }
806
807 const Address invocation_limit(m_counters, MethodCounters::interpreter_invocation_limit_offset());
808 __ z_cl(counter_sum, invocation_limit);
809 __ branch_optimized(Assembler::bcondNotLow, *overflow);
810 }
811
812 __ bind(done);
813
814 BLOCK_COMMENT("} counter_incr");
815 }
816
817 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
818 // InterpreterRuntime::frequency_counter_overflow takes two
819 // arguments, the first (thread) is passed by call_VM, the second
820 // indicates if the counter overflow occurs at a backwards branch
821 // (NULL bcp). We pass zero for it. The call returns the address
822 // of the verified entry point for the method or NULL if the
823 // compilation did not complete (either went background or bailed
824 // out).
825 __ clear_reg(Z_ARG2);
826 __ call_VM(noreg,
827 CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow),
828 Z_ARG2);
829 __ z_bru(do_continue);
830 }
831
832 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register frame_size, Register tmp1) {
833 Register tmp2 = Z_R1_scratch;
834 const int page_size = os::vm_page_size();
835 NearLabel after_frame_check;
836
837 BLOCK_COMMENT("counter_overflow {");
838
839 assert_different_registers(frame_size, tmp1);
840
841 // Stack banging is sufficient overflow check if frame_size < page_size.
842 if (Immediate::is_uimm(page_size, 15)) {
843 __ z_chi(frame_size, page_size);
844 __ z_brl(after_frame_check);
845 } else {
846 __ load_const_optimized(tmp1, page_size);
847 __ compareU32_and_branch(frame_size, tmp1, Assembler::bcondLow, after_frame_check);
848 }
849
850 // Get the stack base, and in debug, verify it is non-zero.
851 __ z_lg(tmp1, thread_(stack_base));
852 #ifdef ASSERT
853 address reentry = NULL;
854 NearLabel base_not_zero;
855 __ compareU64_and_branch(tmp1, (intptr_t)0L, Assembler::bcondNotEqual, base_not_zero);
856 reentry = __ stop_chain_static(reentry, "stack base is zero in generate_stack_overflow_check");
857 __ bind(base_not_zero);
858 #endif
859
860 // Get the stack size, and in debug, verify it is non-zero.
861 assert(sizeof(size_t) == sizeof(intptr_t), "wrong load size");
862 __ z_lg(tmp2, thread_(stack_size));
863 #ifdef ASSERT
864 NearLabel size_not_zero;
865 __ compareU64_and_branch(tmp2, (intptr_t)0L, Assembler::bcondNotEqual, size_not_zero);
866 reentry = __ stop_chain_static(reentry, "stack size is zero in generate_stack_overflow_check");
867 __ bind(size_not_zero);
868 #endif
869
870 // Compute the beginning of the protected zone minus the requested frame size.
871 __ z_sgr(tmp1, tmp2);
872 __ add2reg(tmp1, JavaThread::stack_guard_zone_size());
873
874 // Add in the size of the frame (which is the same as subtracting it from the
875 // SP, which would take another register.
876 __ z_agr(tmp1, frame_size);
877
878 // The frame is greater than one page in size, so check against
879 // the bottom of the stack.
880 __ compareU64_and_branch(Z_SP, tmp1, Assembler::bcondHigh, after_frame_check);
881
882 // The stack will overflow, throw an exception.
883
884 // Restore SP to sender's sp. This is necessary if the sender's frame is an
885 // extended compiled frame (see gen_c2i_adapter()) and safer anyway in case of
886 // JSR292 adaptations.
887 __ resize_frame_absolute(Z_R10, tmp1, true/*load_fp*/);
888
889 // Note also that the restored frame is not necessarily interpreted.
890 // Use the shared runtime version of the StackOverflowError.
891 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
892 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry());
893 __ load_absolute_address(tmp1, StubRoutines::throw_StackOverflowError_entry());
894 __ z_br(tmp1);
895
896 // If you get to here, then there is enough stack space.
897 __ bind(after_frame_check);
898
899 BLOCK_COMMENT("} counter_overflow");
900 }
901
902 // Allocate monitor and lock method (asm interpreter).
903 //
904 // Args:
905 // Z_locals: locals
906
907 void TemplateInterpreterGenerator::lock_method(void) {
908
909 BLOCK_COMMENT("lock_method {");
910
911 // Synchronize method.
912 const Register method = Z_tmp_2;
913 __ get_method(method);
914
915 #ifdef ASSERT
916 address reentry = NULL;
917 {
918 Label L;
919 __ testbit(method2_(method, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
920 __ z_btrue(L);
921 reentry = __ stop_chain_static(reentry, "method doesn't need synchronization");
922 __ bind(L);
923 }
924 #endif // ASSERT
925
926 // Get synchronization object.
927 const Register object = Z_tmp_2;
928
929 {
930 Label done;
931 Label static_method;
932
933 __ testbit(method2_(method, access_flags), JVM_ACC_STATIC_BIT);
934 __ z_btrue(static_method);
935
936 // non-static method: Load receiver obj from stack.
937 __ mem2reg_opt(object, Address(Z_locals, Interpreter::local_offset_in_bytes(0)));
938 __ z_bru(done);
939
940 __ bind(static_method);
941
942 // Lock the java mirror.
943 __ load_mirror(object, method);
944 #ifdef ASSERT
945 {
946 NearLabel L;
947 __ compare64_and_branch(object, (intptr_t) 0, Assembler::bcondNotEqual, L);
948 reentry = __ stop_chain_static(reentry, "synchronization object is NULL");
949 __ bind(L);
950 }
951 #endif // ASSERT
952
953 __ bind(done);
954 }
955
956 __ add_monitor_to_stack(true, Z_ARG3, Z_ARG4, Z_ARG5); // Allocate monitor elem.
957 // Store object and lock it.
958 __ get_monitors(Z_tmp_1);
959 __ reg2mem_opt(object, Address(Z_tmp_1, BasicObjectLock::obj_offset_in_bytes()));
960 __ lock_object(Z_tmp_1, object);
961
962 BLOCK_COMMENT("} lock_method");
963 }
964
965 // Generate a fixed interpreter frame. This is identical setup for
966 // interpreted methods and for native methods hence the shared code.
967 //
968 // Registers alive
969 // Z_thread - JavaThread*
970 // Z_SP - old stack pointer
971 // Z_method - callee's method
972 // Z_esp - parameter list (slot 'above' last param)
973 // Z_R14 - return pc, to be stored in caller's frame
974 // Z_R10 - sender sp, note: Z_tmp_1 is Z_R10!
975 //
976 // Registers updated
977 // Z_SP - new stack pointer
978 // Z_esp - callee's operand stack pointer
979 // points to the slot above the value on top
980 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
981 // Z_bcp - the bytecode pointer
982 // Z_fp - the frame pointer, thereby killing Z_method
983 // Z_ARG2 - copy of Z_method
984 //
985 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
986
987 // stack layout
988 //
989 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (see note below)
990 // [F1's operand stack (unused)]
991 // [F1's outgoing Java arguments] <-- Z_esp
992 // [F1's operand stack (non args)]
993 // [monitors] (optional)
994 // [IJAVA_STATE]
995 //
996 // F2 [PARENT_IJAVA_FRAME_ABI]
997 // ...
998 //
999 // 0x000
1000 //
1001 // Note: Z_R10, the sender sp, will be below Z_SP if F1 was extended by a c2i adapter.
1002
1003 //=============================================================================
1004 // Allocate space for locals other than the parameters, the
1005 // interpreter state, monitors, and the expression stack.
1006
1007 const Register local_count = Z_ARG5;
1008 const Register fp = Z_tmp_2;
1009
1010 BLOCK_COMMENT("generate_fixed_frame {");
1011
1012 {
1013 // local registers
1014 const Register top_frame_size = Z_ARG2;
1015 const Register sp_after_resize = Z_ARG3;
1016 const Register max_stack = Z_ARG4;
1017
1018 // local_count = method->constMethod->max_locals();
1019 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1020 __ z_llgh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset()));
1021
1022 if (native_call) {
1023 // If we're calling a native method, we replace max_stack (which is
1024 // zero) with space for the worst-case signature handler varargs
1025 // vector, which is:
1026 // max_stack = max(Argument::n_register_parameters, parameter_count+2);
1027 //
1028 // We add two slots to the parameter_count, one for the jni
1029 // environment and one for a possible native mirror. We allocate
1030 // space for at least the number of ABI registers, even though
1031 // InterpreterRuntime::slow_signature_handler won't write more than
1032 // parameter_count+2 words when it creates the varargs vector at the
1033 // top of the stack. The generated slow signature handler will just
1034 // load trash into registers beyond the necessary number. We're
1035 // still going to cut the stack back by the ABI register parameter
1036 // count so as to get SP+16 pointing at the ABI outgoing parameter
1037 // area, so we need to allocate at least that much even though we're
1038 // going to throw it away.
1039 //
1040
1041 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1042 __ z_llgh(max_stack, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset()));
1043 __ add2reg(max_stack, 2);
1044
1045 NearLabel passing_args_on_stack;
1046
1047 // max_stack in bytes
1048 __ z_sllg(max_stack, max_stack, LogBytesPerWord);
1049
1050 int argument_registers_in_bytes = Argument::n_register_parameters << LogBytesPerWord;
1051 __ compare64_and_branch(max_stack, argument_registers_in_bytes, Assembler::bcondNotLow, passing_args_on_stack);
1052
1053 __ load_const_optimized(max_stack, argument_registers_in_bytes);
1054
1055 __ bind(passing_args_on_stack);
1056 } else {
1057 // !native_call
1058 __ z_lg(max_stack, method_(const));
1059
1060 // Calculate number of non-parameter locals (in slots):
1061 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1062 __ z_sh(local_count, Address(Z_R1_scratch, ConstMethod::size_of_parameters_offset()));
1063
1064 // max_stack = method->max_stack();
1065 __ z_llgh(max_stack, Address(max_stack, ConstMethod::max_stack_offset()));
1066 // max_stack in bytes
1067 __ z_sllg(max_stack, max_stack, LogBytesPerWord);
1068 }
1069
1070 // Resize (i.e. normally shrink) the top frame F1 ...
1071 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10
1072 // F1's operand stack (free)
1073 // ...
1074 // F1's operand stack (free) <-- Z_esp
1075 // F1's outgoing Java arg m
1076 // ...
1077 // F1's outgoing Java arg 0
1078 // ...
1079 //
1080 // ... into a parent frame (Z_R10 holds F1's SP before any modification, see also above)
1081 //
1082 // +......................+
1083 // : : <-- Z_R10, saved below as F0's z_ijava_state.sender_sp
1084 // : :
1085 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_SP \
1086 // F0's non arg local | = delta
1087 // ... |
1088 // F0's non arg local <-- Z_esp /
1089 // F1's outgoing Java arg m
1090 // ...
1091 // F1's outgoing Java arg 0
1092 // ...
1093 //
1094 // then push the new top frame F0.
1095 //
1096 // F0 [TOP_IJAVA_FRAME_ABI] = frame::z_top_ijava_frame_abi_size \
1097 // [operand stack] = max_stack | = top_frame_size
1098 // [IJAVA_STATE] = frame::z_ijava_state_size /
1099
1100 // sp_after_resize = Z_esp - delta
1101 //
1102 // delta = PARENT_IJAVA_FRAME_ABI + (locals_count - params_count)
1103
1104 __ add2reg(sp_after_resize, (Interpreter::stackElementSize) - (frame::z_parent_ijava_frame_abi_size), Z_esp);
1105 __ z_sllg(Z_R0_scratch, local_count, LogBytesPerWord); // Params have already been subtracted from local_count.
1106 __ z_slgr(sp_after_resize, Z_R0_scratch);
1107
1108 // top_frame_size = TOP_IJAVA_FRAME_ABI + max_stack + size of interpreter state
1109 __ add2reg(top_frame_size,
1110 frame::z_top_ijava_frame_abi_size +
1111 frame::z_ijava_state_size +
1112 frame::interpreter_frame_monitor_size() * wordSize,
1113 max_stack);
1114
1115 if (!native_call) {
1116 // Stack overflow check.
1117 // Native calls don't need the stack size check since they have no
1118 // expression stack and the arguments are already on the stack and
1119 // we only add a handful of words to the stack.
1120 Register frame_size = max_stack; // Reuse the regiser for max_stack.
1121 __ z_lgr(frame_size, Z_SP);
1122 __ z_sgr(frame_size, sp_after_resize);
1123 __ z_agr(frame_size, top_frame_size);
1124 generate_stack_overflow_check(frame_size, fp/*tmp1*/);
1125 }
1126
1127 DEBUG_ONLY(__ z_cg(Z_R14, _z_abi16(return_pc), Z_SP));
1128 __ asm_assert_eq("killed Z_R14", 0);
1129 __ resize_frame_absolute(sp_after_resize, fp, true);
1130 __ save_return_pc(Z_R14);
1131
1132 // ... and push the new frame F0.
1133 __ push_frame(top_frame_size, fp, true /*copy_sp*/, false);
1134 }
1135
1136 //=============================================================================
1137 // Initialize the new frame F0: initialize interpreter state.
1138
1139 {
1140 // locals
1141 const Register local_addr = Z_ARG4;
1142
1143 BLOCK_COMMENT("generate_fixed_frame: initialize interpreter state {");
1144
1145 #ifdef ASSERT
1146 // Set the magic number (using local_addr as tmp register).
1147 __ load_const_optimized(local_addr, frame::z_istate_magic_number);
1148 __ z_stg(local_addr, _z_ijava_state_neg(magic), fp);
1149 #endif
1150
1151 // Save sender SP from F1 (i.e. before it was potentially modified by an
1152 // adapter) into F0's interpreter state. We us it as well to revert
1153 // resizing the frame above.
1154 __ z_stg(Z_R10, _z_ijava_state_neg(sender_sp), fp);
1155
1156 // Load cp cache and save it at the and of this block.
1157 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1158 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstMethod::constants_offset()));
1159 __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstantPool::cache_offset_in_bytes()));
1160
1161 // z_ijava_state->method = method;
1162 __ z_stg(Z_method, _z_ijava_state_neg(method), fp);
1163
1164 // Point locals at the first argument. Method's locals are the
1165 // parameters on top of caller's expression stack.
1166 // Tos points past last Java argument.
1167
1168 __ z_lg(Z_locals, Address(Z_method, Method::const_offset()));
1169 __ z_llgh(Z_locals /*parameter_count words*/,
1170 Address(Z_locals, ConstMethod::size_of_parameters_offset()));
1171 __ z_sllg(Z_locals /*parameter_count bytes*/, Z_locals /*parameter_count*/, LogBytesPerWord);
1172 __ z_agr(Z_locals, Z_esp);
1173 // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0)
1174 // z_ijava_state->locals = Z_esp + parameter_count bytes
1175 __ z_stg(Z_locals, _z_ijava_state_neg(locals), fp);
1176
1177 // z_ijava_state->oop_temp = NULL;
1178 __ store_const(Address(fp, oop_tmp_offset), 0);
1179
1180 // Initialize z_ijava_state->mdx.
1181 Register Rmdp = Z_bcp;
1182 // native_call: assert that mdo == NULL
1183 const bool check_for_mdo = !native_call DEBUG_ONLY(|| native_call);
1184 if (ProfileInterpreter && check_for_mdo) {
1185 Label get_continue;
1186
1187 __ load_and_test_long(Rmdp, method_(method_data));
1188 __ z_brz(get_continue);
1189 DEBUG_ONLY(if (native_call) __ stop("native methods don't have a mdo"));
1190 __ add2reg(Rmdp, in_bytes(MethodData::data_offset()));
1191 __ bind(get_continue);
1192 }
1193 __ z_stg(Rmdp, _z_ijava_state_neg(mdx), fp);
1194
1195 // Initialize z_ijava_state->bcp and Z_bcp.
1196 if (native_call) {
1197 __ clear_reg(Z_bcp); // Must initialize. Will get written into frame where GC reads it.
1198 } else {
1199 __ z_lg(Z_bcp, method_(const));
1200 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset()));
1201 }
1202 __ z_stg(Z_bcp, _z_ijava_state_neg(bcp), fp);
1203
1204 // no monitors and empty operand stack
1205 // => z_ijava_state->monitors points to the top slot in IJAVA_STATE.
1206 // => Z_ijava_state->esp points one slot above into the operand stack.
1207 // z_ijava_state->monitors = fp - frame::z_ijava_state_size - Interpreter::stackElementSize;
1208 // z_ijava_state->esp = Z_esp = z_ijava_state->monitors;
1209 __ add2reg(Z_esp, -frame::z_ijava_state_size, fp);
1210 __ z_stg(Z_esp, _z_ijava_state_neg(monitors), fp);
1211 __ add2reg(Z_esp, -Interpreter::stackElementSize);
1212 __ z_stg(Z_esp, _z_ijava_state_neg(esp), fp);
1213
1214 // z_ijava_state->cpoolCache = Z_R1_scratch (see load above);
1215 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(cpoolCache), fp);
1216
1217 // Get mirror and store it in the frame as GC root for this Method*.
1218 __ load_mirror(Z_R1_scratch, Z_method);
1219 __ z_stg(Z_R1_scratch, _z_ijava_state_neg(mirror), fp);
1220
1221 BLOCK_COMMENT("} generate_fixed_frame: initialize interpreter state");
1222
1223 //=============================================================================
1224 if (!native_call) {
1225 // Fill locals with 0x0s.
1226 NearLabel locals_zeroed;
1227 NearLabel doXC;
1228
1229 // Local_count is already num_locals_slots - num_param_slots.
1230 __ compare64_and_branch(local_count, (intptr_t)0L, Assembler::bcondNotHigh, locals_zeroed);
1231
1232 // Advance local_addr to point behind locals (creates positive incr. in loop).
1233 __ z_lg(Z_R1_scratch, Address(Z_method, Method::const_offset()));
1234 __ z_llgh(Z_R0_scratch, Address(Z_R1_scratch, ConstMethod::size_of_locals_offset()));
1235 __ add2reg(Z_R0_scratch, -1);
1236
1237 __ z_lgr(local_addr/*locals*/, Z_locals);
1238 __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogBytesPerWord);
1239 __ z_sllg(local_count, local_count, LogBytesPerWord); // Local_count are non param locals.
1240 __ z_sgr(local_addr, Z_R0_scratch);
1241
1242 if (VM_Version::has_Prefetch()) {
1243 __ z_pfd(0x02, 0, Z_R0, local_addr);
1244 __ z_pfd(0x02, 256, Z_R0, local_addr);
1245 }
1246
1247 // Can't optimise for Z10 using "compare and branch" (immediate value is too big).
1248 __ z_cghi(local_count, 256);
1249 __ z_brnh(doXC);
1250
1251 // MVCLE: Initialize if quite a lot locals.
1252 // __ bind(doMVCLE);
1253 __ z_lgr(Z_R0_scratch, local_addr);
1254 __ z_lgr(Z_R1_scratch, local_count);
1255 __ clear_reg(Z_ARG2); // Src len of MVCLE is zero.
1256
1257 __ MacroAssembler::move_long_ext(Z_R0_scratch, Z_ARG1, 0);
1258 __ z_bru(locals_zeroed);
1259
1260 Label XC_template;
1261 __ bind(XC_template);
1262 __ z_xc(0, 0, local_addr, 0, local_addr);
1263
1264 __ bind(doXC);
1265 __ z_bctgr(local_count, Z_R0); // Get #bytes-1 for EXECUTE.
1266 if (VM_Version::has_ExecuteExtensions()) {
1267 __ z_exrl(local_count, XC_template); // Execute XC with variable length.
1268 } else {
1269 __ z_larl(Z_R1_scratch, XC_template);
1270 __ z_ex(local_count, 0, Z_R0, Z_R1_scratch); // Execute XC with variable length.
1271 }
1272
1273 __ bind(locals_zeroed);
1274 }
1275
1276 }
1277 // Finally set the frame pointer, destroying Z_method.
1278 assert(Z_fp == Z_method, "maybe set Z_fp earlier if other register than Z_method");
1279 // Oprofile analysis suggests to keep a copy in a register to be used by
1280 // generate_counter_incr().
1281 __ z_lgr(Z_ARG2, Z_method);
1282 __ z_lgr(Z_fp, fp);
1283
1284 BLOCK_COMMENT("} generate_fixed_frame");
1285 }
1286
1287 // Various method entries
1288
1289 // Math function, frame manager must set up an interpreter state, etc.
1290 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
1291
1292 // Decide what to do: Use same platform specific instructions and runtime calls as compilers.
1293 bool use_instruction = false;
1294 address runtime_entry = NULL;
1295 int num_args = 1;
1296 bool double_precision = true;
1297
1298 // s390 specific:
1299 switch (kind) {
1300 case Interpreter::java_lang_math_sqrt:
1301 case Interpreter::java_lang_math_abs: use_instruction = true; break;
1302 case Interpreter::java_lang_math_fmaF:
1303 case Interpreter::java_lang_math_fmaD: use_instruction = UseFMA; break;
1304 default: break; // Fall back to runtime call.
1305 }
1306
1307 switch (kind) {
1308 case Interpreter::java_lang_math_sin : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); break;
1309 case Interpreter::java_lang_math_cos : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); break;
1310 case Interpreter::java_lang_math_tan : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); break;
1311 case Interpreter::java_lang_math_abs : /* run interpreted */ break;
1312 case Interpreter::java_lang_math_sqrt : /* runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsqrt); not available */ break;
1313 case Interpreter::java_lang_math_log : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); break;
1314 case Interpreter::java_lang_math_log10: runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); break;
1315 case Interpreter::java_lang_math_pow : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); num_args = 2; break;
1316 case Interpreter::java_lang_math_exp : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); break;
1317 case Interpreter::java_lang_math_fmaF : /* run interpreted */ num_args = 3; double_precision = false; break;
1318 case Interpreter::java_lang_math_fmaD : /* run interpreted */ num_args = 3; break;
1319 default: ShouldNotReachHere();
1320 }
1321
1322 // Use normal entry if neither instruction nor runtime call is used.
1323 if (!use_instruction && runtime_entry == NULL) return NULL;
1324
1325 address entry = __ pc();
1326
1327 if (use_instruction) {
1328 switch (kind) {
1329 case Interpreter::java_lang_math_sqrt:
1330 // Can use memory operand directly.
1331 __ z_sqdb(Z_FRET, Interpreter::stackElementSize, Z_esp);
1332 break;
1333 case Interpreter::java_lang_math_abs:
1334 // Load operand from stack.
1335 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize));
1336 __ z_lpdbr(Z_FRET);
1337 break;
1338 case Interpreter::java_lang_math_fmaF:
1339 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3
1340 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); // arg1
1341 __ z_maeb(Z_FRET, Z_FARG2, Address(Z_esp, 2 * Interpreter::stackElementSize));
1342 break;
1343 case Interpreter::java_lang_math_fmaD:
1344 __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3
1345 __ mem2freg_opt(Z_FARG2, Address(Z_esp, 5 * Interpreter::stackElementSize)); // arg1
1346 __ z_madb(Z_FRET, Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize));
1347 break;
1348 default: ShouldNotReachHere();
1349 }
1350 } else {
1351 // Load arguments
1352 assert(num_args <= 4, "passed in registers");
1353 if (double_precision) {
1354 int offset = (2 * num_args - 1) * Interpreter::stackElementSize;
1355 for (int i = 0; i < num_args; ++i) {
1356 __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset));
1357 offset -= 2 * Interpreter::stackElementSize;
1358 }
1359 } else {
1360 int offset = num_args * 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 -= Interpreter::stackElementSize;
1364 }
1365 }
1366 // Call runtime
1367 __ save_return_pc(); // Save Z_R14.
1368 __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14.
1369
1370 __ call_VM_leaf(runtime_entry);
1371
1372 __ pop_frame();
1373 __ restore_return_pc(); // Restore Z_R14.
1374 }
1375
1376 // Pop c2i arguments (if any) off when we return.
1377 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
1378
1379 __ z_br(Z_R14);
1380
1381 return entry;
1382 }
1383
1384 // Interpreter stub for calling a native method. (asm interpreter).
1385 // This sets up a somewhat different looking stack for calling the
1386 // native method than the typical interpreter frame setup.
1387 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
1388 // Determine code generation flags.
1389 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1390
1391 // Interpreter entry for ordinary Java methods.
1392 //
1393 // Registers alive
1394 // Z_SP - stack pointer
1395 // Z_thread - JavaThread*
1396 // Z_method - callee's method (method to be invoked)
1397 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg.
1398 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter
1399 // and as well by generate_fixed_frame below)
1400 // Z_R14 - return address to caller (call_stub or c2i_adapter)
1401 //
1402 // Registers updated
1403 // Z_SP - stack pointer
1404 // Z_fp - callee's framepointer
1405 // Z_esp - callee's operand stack pointer
1406 // points to the slot above the value on top
1407 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
1408 // Z_tos - integer result, if any
1409 // z_ftos - floating point result, if any
1410 //
1411 // Stack layout at this point:
1412 //
1413 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if
1414 // frame was extended by c2i adapter)
1415 // [outgoing Java arguments] <-- Z_esp
1416 // ...
1417 // PARENT [PARENT_IJAVA_FRAME_ABI]
1418 // ...
1419 //
1420
1421 address entry_point = __ pc();
1422
1423 // Make sure registers are different!
1424 assert_different_registers(Z_thread, Z_method, Z_esp);
1425
1426 BLOCK_COMMENT("native_entry {");
1427
1428 // Make sure method is native and not abstract.
1429 #ifdef ASSERT
1430 address reentry = NULL;
1431 { Label L;
1432 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT);
1433 __ z_btrue(L);
1434 reentry = __ stop_chain_static(reentry, "tried to execute non-native method as native");
1435 __ bind(L);
1436 }
1437 { Label L;
1438 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT);
1439 __ z_bfalse(L);
1440 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract");
1441 __ bind(L);
1442 }
1443 #endif // ASSERT
1444
1445 #ifdef ASSERT
1446 // Save the return PC into the callers frame for assertion in generate_fixed_frame.
1447 __ save_return_pc(Z_R14);
1448 #endif
1449
1450 // Generate the code to allocate the interpreter stack frame.
1451 generate_fixed_frame(true);
1452
1453 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset());
1454 // Since at this point in the method invocation the exception handler
1455 // would try to exit the monitor of synchronized methods which hasn't
1456 // been entered yet, we set the thread local variable
1457 // _do_not_unlock_if_synchronized to true. If any exception was thrown by
1458 // runtime, exception handling i.e. unlock_if_synchronized_method will
1459 // check this thread local flag.
1460 __ z_mvi(do_not_unlock_if_synchronized, true);
1461
1462 // Increment invocation count and check for overflow.
1463 NearLabel invocation_counter_overflow;
1464 if (inc_counter) {
1465 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1466 }
1467
1468 Label continue_after_compile;
1469 __ bind(continue_after_compile);
1470
1471 bang_stack_shadow_pages(true);
1472
1473 // Reset the _do_not_unlock_if_synchronized flag.
1474 __ z_mvi(do_not_unlock_if_synchronized, false);
1475
1476 // Check for synchronized methods.
1477 // This mst happen AFTER invocation_counter check and stack overflow check,
1478 // so method is not locked if overflows.
1479 if (synchronized) {
1480 lock_method();
1481 } else {
1482 // No synchronization necessary.
1483 #ifdef ASSERT
1484 { Label L;
1485 __ get_method(Z_R1_scratch);
1486 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
1487 __ z_bfalse(L);
1488 reentry = __ stop_chain_static(reentry, "method needs synchronization");
1489 __ bind(L);
1490 }
1491 #endif // ASSERT
1492 }
1493
1494 // start execution
1495
1496 // jvmti support
1497 __ notify_method_entry();
1498
1499 //=============================================================================
1500 // Get and call the signature handler.
1501 const Register Rmethod = Z_tmp_2;
1502 const Register signature_handler_entry = Z_tmp_1;
1503 const Register Rresult_handler = Z_tmp_3;
1504 Label call_signature_handler;
1505
1506 assert_different_registers(Z_fp, Rmethod, signature_handler_entry, Rresult_handler);
1507 assert(Rresult_handler->is_nonvolatile(), "Rresult_handler must be in a non-volatile register");
1508
1509 // Reload method.
1510 __ get_method(Rmethod);
1511
1512 // Check for signature handler.
1513 __ load_and_test_long(signature_handler_entry, method2_(Rmethod, signature_handler));
1514 __ z_brne(call_signature_handler);
1515
1516 // Method has never been called. Either generate a specialized
1517 // handler or point to the slow one.
1518 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call),
1519 Rmethod);
1520
1521 // Reload method.
1522 __ get_method(Rmethod);
1523
1524 // Reload signature handler, it must have been created/assigned in the meantime.
1525 __ z_lg(signature_handler_entry, method2_(Rmethod, signature_handler));
1526
1527 __ bind(call_signature_handler);
1528
1529 // We have a TOP_IJAVA_FRAME here, which belongs to us.
1530 __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1/*tmp*/);
1531
1532 // Call signature handler and pass locals address in Z_ARG1.
1533 __ z_lgr(Z_ARG1, Z_locals);
1534 __ call_stub(signature_handler_entry);
1535 // Save result handler returned by signature handler.
1536 __ z_lgr(Rresult_handler, Z_RET);
1537
1538 // Reload method (the slow signature handler may block for GC).
1539 __ get_method(Rmethod);
1540
1541 // Pass mirror handle if static call.
1542 {
1543 Label method_is_not_static;
1544 __ testbit(method2_(Rmethod, access_flags), JVM_ACC_STATIC_BIT);
1545 __ z_bfalse(method_is_not_static);
1546 // Get mirror.
1547 __ load_mirror(Z_R1, Rmethod);
1548 // z_ijava_state.oop_temp = pool_holder->klass_part()->java_mirror();
1549 __ z_stg(Z_R1, oop_tmp_offset, Z_fp);
1550 // Pass handle to mirror as 2nd argument to JNI method.
1551 __ add2reg(Z_ARG2, oop_tmp_offset, Z_fp);
1552 __ bind(method_is_not_static);
1553 }
1554
1555 // Pass JNIEnv address as first parameter.
1556 __ add2reg(Z_ARG1, in_bytes(JavaThread::jni_environment_offset()), Z_thread);
1557
1558 // Note: last java frame has been set above already. The pc from there
1559 // is precise enough.
1560
1561 // Get native function entry point before we change the thread state.
1562 __ z_lg(Z_R1/*native_method_entry*/, method2_(Rmethod, native_function));
1563
1564 //=============================================================================
1565 // Transition from _thread_in_Java to _thread_in_native. As soon as
1566 // we make this change the safepoint code needs to be certain that
1567 // the last Java frame we established is good. The pc in that frame
1568 // just need to be near here not an actual return address.
1569 #ifdef ASSERT
1570 {
1571 NearLabel L;
1572 __ mem2reg_opt(Z_R14, Address(Z_thread, JavaThread::thread_state_offset()), false /*32 bits*/);
1573 __ compareU32_and_branch(Z_R14, _thread_in_Java, Assembler::bcondEqual, L);
1574 reentry = __ stop_chain_static(reentry, "Wrong thread state in native stub");
1575 __ bind(L);
1576 }
1577 #endif
1578
1579 // Memory ordering: Z does not reorder store/load with subsequent load. That's strong enough.
1580 __ set_thread_state(_thread_in_native);
1581
1582 //=============================================================================
1583 // Call the native method. Argument registers must not have been
1584 // overwritten since "__ call_stub(signature_handler);" (except for
1585 // ARG1 and ARG2 for static methods).
1586
1587 __ call_c(Z_R1/*native_method_entry*/);
1588
1589 // NOTE: frame::interpreter_frame_result() depends on these stores.
1590 __ z_stg(Z_RET, _z_ijava_state_neg(lresult), Z_fp);
1591 __ freg2mem_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult)));
1592 const Register Rlresult = signature_handler_entry;
1593 assert(Rlresult->is_nonvolatile(), "Rlresult must be in a non-volatile register");
1594 __ z_lgr(Rlresult, Z_RET);
1595
1596 // Z_method may no longer be valid, because of GC.
1597
1598 // Block, if necessary, before resuming in _thread_in_Java state.
1599 // In order for GC to work, don't clear the last_Java_sp until after
1600 // blocking.
1601
1602 //=============================================================================
1603 // Switch thread to "native transition" state before reading the
1604 // synchronization state. This additional state is necessary
1605 // because reading and testing the synchronization state is not
1606 // atomic w.r.t. GC, as this scenario demonstrates: Java thread A,
1607 // in _thread_in_native state, loads _not_synchronized and is
1608 // preempted. VM thread changes sync state to synchronizing and
1609 // suspends threads for GC. Thread A is resumed to finish this
1610 // native method, but doesn't block here since it didn't see any
1611 // synchronization is progress, and escapes.
1612
1613 __ set_thread_state(_thread_in_native_trans);
1614 if (UseMembar) {
1615 __ z_fence();
1616 } else {
1617 // Write serialization page so VM thread can do a pseudo remote
1618 // membar. We use the current thread pointer to calculate a thread
1619 // specific offset to write to within the page. This minimizes bus
1620 // traffic due to cache line collision.
1621 __ serialize_memory(Z_thread, Z_R1, Z_R0);
1622 }
1623 // Now before we return to java we must look for a current safepoint
1624 // (a new safepoint can not start since we entered native_trans).
1625 // We must check here because a current safepoint could be modifying
1626 // the callers registers right this moment.
1627
1628 // Check for safepoint operation in progress and/or pending suspend requests.
1629 {
1630 Label Continue, do_safepoint;
1631 __ generate_safepoint_check(do_safepoint, Z_R1, true);
1632 // Check for suspend.
1633 __ load_and_test_int(Z_R0/*suspend_flags*/, thread_(suspend_flags));
1634 __ z_bre(Continue); // 0 -> no flag set -> not suspended
1635 __ bind(do_safepoint);
1636 __ z_lgr(Z_ARG1, Z_thread);
1637 __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
1638 __ bind(Continue);
1639 }
1640
1641 //=============================================================================
1642 // Back in Interpreter Frame.
1643
1644 // We are in thread_in_native_trans here and back in the normal
1645 // interpreter frame. We don't have to do anything special about
1646 // safepoints and we can switch to Java mode anytime we are ready.
1647
1648 // Note: frame::interpreter_frame_result has a dependency on how the
1649 // method result is saved across the call to post_method_exit. For
1650 // native methods it assumes that the non-FPU/non-void result is
1651 // saved in z_ijava_state.lresult and a FPU result in z_ijava_state.fresult. If
1652 // this changes then the interpreter_frame_result implementation
1653 // will need to be updated too.
1654
1655 //=============================================================================
1656 // Back in Java.
1657
1658 // Memory ordering: Z does not reorder store/load with subsequent
1659 // load. That's strong enough.
1660 __ set_thread_state(_thread_in_Java);
1661
1662 __ reset_last_Java_frame();
1663
1664 // We reset the JNI handle block only after unboxing the result; see below.
1665
1666 // The method register is junk from after the thread_in_native transition
1667 // until here. Also can't call_VM until the bcp has been
1668 // restored. Need bcp for throwing exception below so get it now.
1669 __ get_method(Rmethod);
1670
1671 // Restore Z_bcp to have legal interpreter frame,
1672 // i.e., bci == 0 <=> Z_bcp == code_base().
1673 __ z_lg(Z_bcp, Address(Rmethod, Method::const_offset())); // get constMethod
1674 __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); // get codebase
1675
1676 if (CheckJNICalls) {
1677 // clear_pending_jni_exception_check
1678 __ clear_mem(Address(Z_thread, JavaThread::pending_jni_exception_check_fn_offset()), sizeof(oop));
1679 }
1680
1681 // Check if the native method returns an oop, and if so, move it
1682 // from the jni handle to z_ijava_state.oop_temp. This is
1683 // necessary, because we reset the jni handle block below.
1684 // NOTE: frame::interpreter_frame_result() depends on this, too.
1685 { NearLabel no_oop_result;
1686 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT));
1687 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_result);
1688 __ resolve_jobject(Rlresult, /* tmp1 */ Rmethod, /* tmp2 */ Z_R1);
1689 __ z_stg(Rlresult, oop_tmp_offset, Z_fp);
1690 __ bind(no_oop_result);
1691 }
1692
1693 // Reset handle block.
1694 __ z_lg(Z_R1/*active_handles*/, thread_(active_handles));
1695 __ clear_mem(Address(Z_R1, JNIHandleBlock::top_offset_in_bytes()), 4);
1696
1697 // Bandle exceptions (exception handling will handle unlocking!).
1698 {
1699 Label L;
1700 __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception));
1701 __ z_bre(L);
1702 __ MacroAssembler::call_VM(noreg,
1703 CAST_FROM_FN_PTR(address,
1704 InterpreterRuntime::throw_pending_exception));
1705 __ should_not_reach_here();
1706 __ bind(L);
1707 }
1708
1709 if (synchronized) {
1710 Register Rfirst_monitor = Z_ARG2;
1711 __ add2reg(Rfirst_monitor, -(frame::z_ijava_state_size + (int)sizeof(BasicObjectLock)), Z_fp);
1712 #ifdef ASSERT
1713 NearLabel ok;
1714 __ z_lg(Z_R1, _z_ijava_state_neg(monitors), Z_fp);
1715 __ compareU64_and_branch(Rfirst_monitor, Z_R1, Assembler::bcondEqual, ok);
1716 reentry = __ stop_chain_static(reentry, "native_entry:unlock: inconsistent z_ijava_state.monitors");
1717 __ bind(ok);
1718 #endif
1719 __ unlock_object(Rfirst_monitor);
1720 }
1721
1722 // JVMTI support. Result has already been saved above to the frame.
1723 __ notify_method_exit(true/*native_method*/, ilgl, InterpreterMacroAssembler::NotifyJVMTI);
1724
1725 // Move native method result back into proper registers and return.
1726 // C++ interpreter does not use result handler. So do we need to here? TODO(ZASM): check if correct.
1727 { NearLabel no_oop_or_null;
1728 __ mem2freg_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult)));
1729 __ load_and_test_long(Z_RET, Address(Z_fp, _z_ijava_state_neg(lresult)));
1730 __ z_bre(no_oop_or_null); // No unboxing if the result is NULL.
1731 __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT));
1732 __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_or_null);
1733 __ z_lg(Z_RET, oop_tmp_offset, Z_fp);
1734 __ verify_oop(Z_RET);
1735 __ bind(no_oop_or_null);
1736 }
1737
1738 // Pop the native method's interpreter frame.
1739 __ pop_interpreter_frame(Z_R14 /*return_pc*/, Z_ARG2/*tmp1*/, Z_ARG3/*tmp2*/);
1740
1741 // Return to caller.
1742 __ z_br(Z_R14);
1743
1744 if (inc_counter) {
1745 // Handle overflow of counter and compile method.
1746 __ bind(invocation_counter_overflow);
1747 generate_counter_overflow(continue_after_compile);
1748 }
1749
1750 BLOCK_COMMENT("} native_entry");
1751
1752 return entry_point;
1753 }
1754
1755 //
1756 // Generic interpreted method entry to template interpreter.
1757 //
1758 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1759 address entry_point = __ pc();
1760
1761 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1762
1763 // Interpreter entry for ordinary Java methods.
1764 //
1765 // Registers alive
1766 // Z_SP - stack pointer
1767 // Z_thread - JavaThread*
1768 // Z_method - callee's method (method to be invoked)
1769 // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg.
1770 // Z_R10 - sender sp (before modifications, e.g. by c2i adapter
1771 // and as well by generate_fixed_frame below)
1772 // Z_R14 - return address to caller (call_stub or c2i_adapter)
1773 //
1774 // Registers updated
1775 // Z_SP - stack pointer
1776 // Z_fp - callee's framepointer
1777 // Z_esp - callee's operand stack pointer
1778 // points to the slot above the value on top
1779 // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord)
1780 // Z_tos - integer result, if any
1781 // z_ftos - floating point result, if any
1782 //
1783 //
1784 // stack layout at this point:
1785 //
1786 // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if
1787 // frame was extended by c2i adapter)
1788 // [outgoing Java arguments] <-- Z_esp
1789 // ...
1790 // PARENT [PARENT_IJAVA_FRAME_ABI]
1791 // ...
1792 //
1793 // stack layout before dispatching the first bytecode:
1794 //
1795 // F0 [TOP_IJAVA_FRAME_ABI] <-- Z_SP
1796 // [operand stack] <-- Z_esp
1797 // monitor (optional, can grow)
1798 // [IJAVA_STATE]
1799 // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_fp (== *Z_SP)
1800 // [F0's locals] <-- Z_locals
1801 // [F1's operand stack]
1802 // [F1's monitors] (optional)
1803 // [IJAVA_STATE]
1804
1805 // Make sure registers are different!
1806 assert_different_registers(Z_thread, Z_method, Z_esp);
1807
1808 BLOCK_COMMENT("normal_entry {");
1809
1810 // Make sure method is not native and not abstract.
1811 // Rethink these assertions - they can be simplified and shared.
1812 #ifdef ASSERT
1813 address reentry = NULL;
1814 { Label L;
1815 __ testbit(method_(access_flags), JVM_ACC_NATIVE_BIT);
1816 __ z_bfalse(L);
1817 reentry = __ stop_chain_static(reentry, "tried to execute native method as non-native");
1818 __ bind(L);
1819 }
1820 { Label L;
1821 __ testbit(method_(access_flags), JVM_ACC_ABSTRACT_BIT);
1822 __ z_bfalse(L);
1823 reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract");
1824 __ bind(L);
1825 }
1826 #endif // ASSERT
1827
1828 #ifdef ASSERT
1829 // Save the return PC into the callers frame for assertion in generate_fixed_frame.
1830 __ save_return_pc(Z_R14);
1831 #endif
1832
1833 // Generate the code to allocate the interpreter stack frame.
1834 generate_fixed_frame(false);
1835
1836 const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset());
1837 // Since at this point in the method invocation the exception handler
1838 // would try to exit the monitor of synchronized methods which hasn't
1839 // been entered yet, we set the thread local variable
1840 // _do_not_unlock_if_synchronized to true. If any exception was thrown by
1841 // runtime, exception handling i.e. unlock_if_synchronized_method will
1842 // check this thread local flag.
1843 __ z_mvi(do_not_unlock_if_synchronized, true);
1844
1845 __ profile_parameters_type(Z_tmp_2, Z_ARG3, Z_ARG4);
1846
1847 // Increment invocation counter and check for overflow.
1848 //
1849 // Note: checking for negative value instead of overflow so we have a 'sticky'
1850 // overflow test (may be of importance as soon as we have true MT/MP).
1851 NearLabel invocation_counter_overflow;
1852 NearLabel profile_method;
1853 NearLabel profile_method_continue;
1854 NearLabel Lcontinue;
1855 if (inc_counter) {
1856 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1857 if (ProfileInterpreter) {
1858 __ bind(profile_method_continue);
1859 }
1860 }
1861 __ bind(Lcontinue);
1862
1863 bang_stack_shadow_pages(false);
1864
1865 // Reset the _do_not_unlock_if_synchronized flag.
1866 __ z_mvi(do_not_unlock_if_synchronized, false);
1867
1868 // Check for synchronized methods.
1869 // Must happen AFTER invocation_counter check and stack overflow check,
1870 // so method is not locked if overflows.
1871 if (synchronized) {
1872 // Allocate monitor and lock method.
1873 lock_method();
1874 } else {
1875 #ifdef ASSERT
1876 { Label L;
1877 __ get_method(Z_R1_scratch);
1878 __ testbit(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT);
1879 __ z_bfalse(L);
1880 reentry = __ stop_chain_static(reentry, "method needs synchronization");
1881 __ bind(L);
1882 }
1883 #endif // ASSERT
1884 }
1885
1886 // start execution
1887
1888 #ifdef ASSERT
1889 __ verify_esp(Z_esp, Z_R1_scratch);
1890
1891 __ verify_thread();
1892 #endif
1893
1894 // jvmti support
1895 __ notify_method_entry();
1896
1897 // Start executing instructions.
1898 __ dispatch_next(vtos);
1899 // Dispatch_next does not return.
1900 DEBUG_ONLY(__ should_not_reach_here());
1901
1902 // Invocation counter overflow.
1903 if (inc_counter) {
1904 if (ProfileInterpreter) {
1905 // We have decided to profile this method in the interpreter.
1906 __ bind(profile_method);
1907
1908 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1909 __ set_method_data_pointer_for_bcp();
1910 __ z_bru(profile_method_continue);
1911 }
1912
1913 // Handle invocation counter overflow.
1914 __ bind(invocation_counter_overflow);
1915 generate_counter_overflow(Lcontinue);
1916 }
1917
1918 BLOCK_COMMENT("} normal_entry");
1919
1920 return entry_point;
1921 }
1922
1923
1924 /**
1925 * Method entry for static native methods:
1926 * int java.util.zip.CRC32.update(int crc, int b)
1927 */
1928 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
1929
1930 if (UseCRC32Intrinsics) {
1931 uint64_t entry_off = __ offset();
1932 Label slow_path;
1933
1934 // If we need a safepoint check, generate full interpreter entry.
1935 __ generate_safepoint_check(slow_path, Z_R1, false);
1936
1937 BLOCK_COMMENT("CRC32_update {");
1938
1939 // We don't generate local frame and don't align stack because
1940 // we not even call stub code (we generate the code inline)
1941 // and there is no safepoint on this path.
1942
1943 // Load java parameters.
1944 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
1945 const Register argP = Z_esp;
1946 const Register crc = Z_ARG1; // crc value
1947 const Register data = Z_ARG2; // address of java byte value (kernel_crc32 needs address)
1948 const Register dataLen = Z_ARG3; // source data len (1 byte). Not used because calling the single-byte emitter.
1949 const Register table = Z_ARG4; // address of crc32 table
1950
1951 // Arguments are reversed on java expression stack.
1952 __ z_la(data, 3+1*wordSize, argP); // byte value (stack address).
1953 // Being passed as an int, the single byte is at offset +3.
1954 __ z_llgf(crc, 2 * wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register.
1955
1956 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table);
1957 __ kernel_crc32_singleByte(crc, data, dataLen, table, Z_R1, true);
1958
1959 // Restore caller sp for c2i case.
1960 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
1961
1962 __ z_br(Z_R14);
1963
1964 BLOCK_COMMENT("} CRC32_update");
1965
1966 // Use a previously generated vanilla native entry as the slow path.
1967 BIND(slow_path);
1968 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1);
1969 return __ addr_at(entry_off);
1970 }
1971
1972 return NULL;
1973 }
1974
1975
1976 /**
1977 * Method entry for static native methods:
1978 * int java.util.zip.CRC32.updateBytes( int crc, byte[] b, int off, int len)
1979 * int java.util.zip.CRC32.updateByteBuffer(int crc, long* buf, int off, int len)
1980 */
1981 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
1982
1983 if (UseCRC32Intrinsics) {
1984 uint64_t entry_off = __ offset();
1985 Label slow_path;
1986
1987 // If we need a safepoint check, generate full interpreter entry.
1988 __ generate_safepoint_check(slow_path, Z_R1, false);
1989
1990 // We don't generate local frame and don't align stack because
1991 // we call stub code and there is no safepoint on this path.
1992
1993 // Load parameters.
1994 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
1995 const Register argP = Z_esp;
1996 const Register crc = Z_ARG1; // crc value
1997 const Register data = Z_ARG2; // address of java byte array
1998 const Register dataLen = Z_ARG3; // source data len
1999 const Register table = Z_ARG4; // address of crc32 table
2000 const Register t0 = Z_R10; // work reg for kernel* emitters
2001 const Register t1 = Z_R11; // work reg for kernel* emitters
2002 const Register t2 = Z_R12; // work reg for kernel* emitters
2003 const Register t3 = Z_R13; // work reg for kernel* emitters
2004
2005 // Arguments are reversed on java expression stack.
2006 // Calculate address of start element.
2007 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { // Used for "updateByteBuffer direct".
2008 // crc @ (SP + 5W) (32bit)
2009 // buf @ (SP + 3W) (64bit ptr to long array)
2010 // off @ (SP + 2W) (32bit)
2011 // dataLen @ (SP + 1W) (32bit)
2012 // data = buf + off
2013 BLOCK_COMMENT("CRC32_updateByteBuffer {");
2014 __ z_llgf(crc, 5*wordSize, argP); // current crc state
2015 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2016 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2017 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process
2018 } else { // Used for "updateBytes update".
2019 // crc @ (SP + 4W) (32bit)
2020 // buf @ (SP + 3W) (64bit ptr to byte array)
2021 // off @ (SP + 2W) (32bit)
2022 // dataLen @ (SP + 1W) (32bit)
2023 // data = buf + off + base_offset
2024 BLOCK_COMMENT("CRC32_updateBytes {");
2025 __ z_llgf(crc, 4*wordSize, argP); // current crc state
2026 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2027 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2028 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process
2029 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
2030 }
2031
2032 StubRoutines::zarch::generate_load_crc_table_addr(_masm, table);
2033
2034 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers.
2035 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers.
2036 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, true);
2037 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack.
2038
2039 // Restore caller sp for c2i case.
2040 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
2041
2042 __ z_br(Z_R14);
2043
2044 BLOCK_COMMENT("} CRC32_update{Bytes|ByteBuffer}");
2045
2046 // Use a previously generated vanilla native entry as the slow path.
2047 BIND(slow_path);
2048 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1);
2049 return __ addr_at(entry_off);
2050 }
2051
2052 return NULL;
2053 }
2054
2055
2056 /**
2057 * Method entry for intrinsic-candidate (non-native) methods:
2058 * int java.util.zip.CRC32C.updateBytes( int crc, byte[] b, int off, int end)
2059 * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long* buf, int off, int end)
2060 * Unlike CRC32, CRC32C does not have any methods marked as native
2061 * CRC32C also uses an "end" variable instead of the length variable CRC32 uses
2062 */
2063 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
2064
2065 if (UseCRC32CIntrinsics) {
2066 uint64_t entry_off = __ offset();
2067
2068 // We don't generate local frame and don't align stack because
2069 // we call stub code and there is no safepoint on this path.
2070
2071 // Load parameters.
2072 // Z_esp is callers operand stack pointer, i.e. it points to the parameters.
2073 const Register argP = Z_esp;
2074 const Register crc = Z_ARG1; // crc value
2075 const Register data = Z_ARG2; // address of java byte array
2076 const Register dataLen = Z_ARG3; // source data len
2077 const Register table = Z_ARG4; // address of crc32 table
2078 const Register t0 = Z_R10; // work reg for kernel* emitters
2079 const Register t1 = Z_R11; // work reg for kernel* emitters
2080 const Register t2 = Z_R12; // work reg for kernel* emitters
2081 const Register t3 = Z_R13; // work reg for kernel* emitters
2082
2083 // Arguments are reversed on java expression stack.
2084 // Calculate address of start element.
2085 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { // Used for "updateByteBuffer direct".
2086 // crc @ (SP + 5W) (32bit)
2087 // buf @ (SP + 3W) (64bit ptr to long array)
2088 // off @ (SP + 2W) (32bit)
2089 // dataLen @ (SP + 1W) (32bit)
2090 // data = buf + off
2091 BLOCK_COMMENT("CRC32C_updateDirectByteBuffer {");
2092 __ z_llgf(crc, 5*wordSize, argP); // current crc state
2093 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2094 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2095 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as
2096 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset)
2097 } else { // Used for "updateBytes update".
2098 // crc @ (SP + 4W) (32bit)
2099 // buf @ (SP + 3W) (64bit ptr to byte array)
2100 // off @ (SP + 2W) (32bit)
2101 // dataLen @ (SP + 1W) (32bit)
2102 // data = buf + off + base_offset
2103 BLOCK_COMMENT("CRC32C_updateBytes {");
2104 __ z_llgf(crc, 4*wordSize, argP); // current crc state
2105 __ z_lg(data, 3*wordSize, argP); // start of byte buffer
2106 __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset.
2107 __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as
2108 __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset)
2109 __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
2110 }
2111
2112 StubRoutines::zarch::generate_load_crc32c_table_addr(_masm, table);
2113
2114 __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers.
2115 __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers.
2116 __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, false);
2117 __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack.
2118
2119 // Restore caller sp for c2i case.
2120 __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started.
2121
2122 __ z_br(Z_R14);
2123
2124 BLOCK_COMMENT("} CRC32C_update{Bytes|DirectByteBuffer}");
2125 return __ addr_at(entry_off);
2126 }
2127
2128 return NULL;
2129 }
2130
2131 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
2132 // Quick & dirty stack overflow checking: bang the stack & handle trap.
2133 // Note that we do the banging after the frame is setup, since the exception
2134 // handling code expects to find a valid interpreter frame on the stack.
2135 // Doing the banging earlier fails if the caller frame is not an interpreter
2136 // frame.
2137 // (Also, the exception throwing code expects to unlock any synchronized
2138 // method receiver, so do the banging after locking the receiver.)
2139
2140 // Bang each page in the shadow zone. We can't assume it's been done for
2141 // an interpreter frame with greater than a page of locals, so each page
2142 // needs to be checked. Only true for non-native. For native, we only bang the last page.
2143 if (UseStackBanging) {
2144 const int page_size = os::vm_page_size();
2145 const int n_shadow_pages = (int)(JavaThread::stack_shadow_zone_size()/page_size);
2146 const int start_page_num = native_call ? n_shadow_pages : 1;
2147 for (int pages = start_page_num; pages <= n_shadow_pages; pages++) {
2148 __ bang_stack_with_offset(pages*page_size);
2149 }
2150 }
2151 }
2152
2153 //-----------------------------------------------------------------------------
2154 // Exceptions
2155
2156 void TemplateInterpreterGenerator::generate_throw_exception() {
2157
2158 BLOCK_COMMENT("throw_exception {");
2159
2160 // Entry point in previous activation (i.e., if the caller was interpreted).
2161 Interpreter::_rethrow_exception_entry = __ pc();
2162 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Frame accessors use Z_fp.
2163 // Z_ARG1 (==Z_tos): exception
2164 // Z_ARG2 : Return address/pc that threw exception.
2165 __ restore_bcp(); // R13 points to call/send.
2166 __ restore_locals();
2167
2168 // Fallthrough, no need to restore Z_esp.
2169
2170 // Entry point for exceptions thrown within interpreter code.
2171 Interpreter::_throw_exception_entry = __ pc();
2172 // Expression stack is undefined here.
2173 // Z_ARG1 (==Z_tos): exception
2174 // Z_bcp: exception bcp
2175 __ verify_oop(Z_ARG1);
2176 __ z_lgr(Z_ARG2, Z_ARG1);
2177
2178 // Expression stack must be empty before entering the VM in case of
2179 // an exception.
2180 __ empty_expression_stack();
2181 // Find exception handler address and preserve exception oop.
2182 const Register Rpreserved_exc_oop = Z_tmp_1;
2183 __ call_VM(Rpreserved_exc_oop,
2184 CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception),
2185 Z_ARG2);
2186 // Z_RET: exception handler entry point
2187 // Z_bcp: bcp for exception handler
2188 __ push_ptr(Rpreserved_exc_oop); // Push exception which is now the only value on the stack.
2189 __ z_br(Z_RET); // Jump to exception handler (may be _remove_activation_entry!).
2190
2191 // If the exception is not handled in the current frame the frame is
2192 // removed and the exception is rethrown (i.e. exception
2193 // continuation is _rethrow_exception).
2194 //
2195 // Note: At this point the bci is still the bci for the instruction
2196 // which caused the exception and the expression stack is
2197 // empty. Thus, for any VM calls at this point, GC will find a legal
2198 // oop map (with empty expression stack).
2199
2200 //
2201 // JVMTI PopFrame support
2202 //
2203
2204 Interpreter::_remove_activation_preserving_args_entry = __ pc();
2205 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP);
2206 __ empty_expression_stack();
2207 // Set the popframe_processing bit in pending_popframe_condition
2208 // indicating that we are currently handling popframe, so that
2209 // call_VMs that may happen later do not trigger new popframe
2210 // handling cycles.
2211 __ load_sized_value(Z_tmp_1, Address(Z_thread, JavaThread::popframe_condition_offset()), 4, false /*signed*/);
2212 __ z_oill(Z_tmp_1, JavaThread::popframe_processing_bit);
2213 __ z_sty(Z_tmp_1, thread_(popframe_condition));
2214
2215 {
2216 // Check to see whether we are returning to a deoptimized frame.
2217 // (The PopFrame call ensures that the caller of the popped frame is
2218 // either interpreted or compiled and deoptimizes it if compiled.)
2219 // In this case, we can't call dispatch_next() after the frame is
2220 // popped, but instead must save the incoming arguments and restore
2221 // them after deoptimization has occurred.
2222 //
2223 // Note that we don't compare the return PC against the
2224 // deoptimization blob's unpack entry because of the presence of
2225 // adapter frames in C2.
2226 NearLabel caller_not_deoptimized;
2227 __ z_lg(Z_ARG1, _z_parent_ijava_frame_abi(return_pc), Z_fp);
2228 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), Z_ARG1);
2229 __ compareU64_and_branch(Z_RET, (intptr_t)0, Assembler::bcondNotEqual, caller_not_deoptimized);
2230
2231 // Compute size of arguments for saving when returning to
2232 // deoptimized caller.
2233 __ get_method(Z_ARG2);
2234 __ z_lg(Z_ARG2, Address(Z_ARG2, Method::const_offset()));
2235 __ z_llgh(Z_ARG2, Address(Z_ARG2, ConstMethod::size_of_parameters_offset()));
2236 __ z_sllg(Z_ARG2, Z_ARG2, Interpreter::logStackElementSize); // slots 2 bytes
2237 __ restore_locals();
2238 // Compute address of args to be saved.
2239 __ z_lgr(Z_ARG3, Z_locals);
2240 __ z_slgr(Z_ARG3, Z_ARG2);
2241 __ add2reg(Z_ARG3, wordSize);
2242 // Save these arguments.
2243 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args),
2244 Z_thread, Z_ARG2, Z_ARG3);
2245
2246 __ remove_activation(vtos, Z_R14,
2247 /* throw_monitor_exception */ false,
2248 /* install_monitor_exception */ false,
2249 /* notify_jvmdi */ false);
2250
2251 // Inform deoptimization that it is responsible for restoring
2252 // these arguments.
2253 __ store_const(thread_(popframe_condition),
2254 JavaThread::popframe_force_deopt_reexecution_bit,
2255 Z_tmp_1, false);
2256
2257 // Continue in deoptimization handler.
2258 __ z_br(Z_R14);
2259
2260 __ bind(caller_not_deoptimized);
2261 }
2262
2263 // Clear the popframe condition flag.
2264 __ clear_mem(thread_(popframe_condition), sizeof(int));
2265
2266 __ remove_activation(vtos,
2267 noreg, // Retaddr is not used.
2268 false, // throw_monitor_exception
2269 false, // install_monitor_exception
2270 false); // notify_jvmdi
2271 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
2272 __ restore_bcp();
2273 __ restore_locals();
2274 __ restore_esp();
2275 // The method data pointer was incremented already during
2276 // call profiling. We have to restore the mdp for the current bcp.
2277 if (ProfileInterpreter) {
2278 __ set_method_data_pointer_for_bcp();
2279 }
2280 #if INCLUDE_JVMTI
2281 {
2282 Label L_done;
2283
2284 __ z_cli(0, Z_bcp, Bytecodes::_invokestatic);
2285 __ z_brc(Assembler::bcondNotEqual, L_done);
2286
2287 // The member name argument must be restored if _invokestatic is
2288 // re-executed after a PopFrame call. Detect such a case in the
2289 // InterpreterRuntime function and return the member name
2290 // argument, or NULL.
2291 __ z_lg(Z_ARG2, Address(Z_locals));
2292 __ get_method(Z_ARG3);
2293 __ call_VM(Z_tmp_1,
2294 CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null),
2295 Z_ARG2, Z_ARG3, Z_bcp);
2296
2297 __ z_ltgr(Z_tmp_1, Z_tmp_1);
2298 __ z_brc(Assembler::bcondEqual, L_done);
2299
2300 __ z_stg(Z_tmp_1, Address(Z_esp, wordSize));
2301 __ bind(L_done);
2302 }
2303 #endif // INCLUDE_JVMTI
2304 __ dispatch_next(vtos);
2305 // End of PopFrame support.
2306 Interpreter::_remove_activation_entry = __ pc();
2307
2308 // In between activations - previous activation type unknown yet
2309 // compute continuation point - the continuation point expects the
2310 // following registers set up:
2311 //
2312 // Z_ARG1 (==Z_tos): exception
2313 // Z_ARG2 : return address/pc that threw exception
2314
2315 Register return_pc = Z_tmp_1;
2316 Register handler = Z_tmp_2;
2317 assert(return_pc->is_nonvolatile(), "use non-volatile reg. to preserve exception pc");
2318 assert(handler->is_nonvolatile(), "use non-volatile reg. to handler pc");
2319 __ asm_assert_ijava_state_magic(return_pc/*tmp*/); // The top frame should be an interpreter frame.
2320 __ z_lg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_fp);
2321
2322 // Moved removing the activation after VM call, because the new top
2323 // frame does not necessarily have the z_abi_160 required for a VM
2324 // call (e.g. if it is compiled).
2325
2326 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
2327 SharedRuntime::exception_handler_for_return_address),
2328 Z_thread, return_pc);
2329 __ z_lgr(handler, Z_RET); // Save exception handler.
2330
2331 // Preserve exception over this code sequence.
2332 __ pop_ptr(Z_ARG1);
2333 __ set_vm_result(Z_ARG1);
2334 // Remove the activation (without doing throws on illegalMonitorExceptions).
2335 __ remove_activation(vtos, noreg/*ret.pc already loaded*/, false/*throw exc*/, true/*install exc*/, false/*notify jvmti*/);
2336 __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer.
2337
2338 __ get_vm_result(Z_ARG1); // Restore exception.
2339 __ verify_oop(Z_ARG1);
2340 __ z_lgr(Z_ARG2, return_pc); // Restore return address.
2341
2342 #ifdef ASSERT
2343 // The return_pc in the new top frame is dead... at least that's my
2344 // current understanding. To assert this I overwrite it.
2345 // Note: for compiled frames the handler is the deopt blob
2346 // which writes Z_ARG2 into the return_pc slot.
2347 __ load_const_optimized(return_pc, 0xb00b1);
2348 __ z_stg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_SP);
2349 #endif
2350
2351 // Z_ARG1 (==Z_tos): exception
2352 // Z_ARG2 : return address/pc that threw exception
2353
2354 // Note that an "issuing PC" is actually the next PC after the call.
2355 __ z_br(handler); // Jump to exception handler of caller.
2356
2357 BLOCK_COMMENT("} throw_exception");
2358 }
2359
2360 //
2361 // JVMTI ForceEarlyReturn support
2362 //
2363 address TemplateInterpreterGenerator::generate_earlyret_entry_for (TosState state) {
2364 address entry = __ pc();
2365
2366 BLOCK_COMMENT("earlyret_entry {");
2367
2368 __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP);
2369 __ restore_bcp();
2370 __ restore_locals();
2371 __ restore_esp();
2372 __ empty_expression_stack();
2373 __ load_earlyret_value(state);
2374
2375 Register RjvmtiState = Z_tmp_1;
2376 __ z_lg(RjvmtiState, thread_(jvmti_thread_state));
2377 __ store_const(Address(RjvmtiState, JvmtiThreadState::earlyret_state_offset()),
2378 JvmtiThreadState::earlyret_inactive, 4, 4, Z_R0_scratch);
2379
2380 if (state == itos) {
2381 // Narrow result if state is itos but result type is smaller.
2382 // Need to narrow in the return bytecode rather than in generate_return_entry
2383 // since compiled code callers expect the result to already be narrowed.
2384 __ narrow(Z_tos, Z_tmp_1); /* fall through */
2385 }
2386 __ remove_activation(state,
2387 Z_tmp_1, // retaddr
2388 false, // throw_monitor_exception
2389 false, // install_monitor_exception
2390 true); // notify_jvmdi
2391 __ z_br(Z_tmp_1);
2392
2393 BLOCK_COMMENT("} earlyret_entry");
2394
2395 return entry;
2396 }
2397
2398 //-----------------------------------------------------------------------------
2399 // Helper for vtos entry point generation.
2400
2401 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
2402 address& bep,
2403 address& cep,
2404 address& sep,
2405 address& aep,
2406 address& iep,
2407 address& lep,
2408 address& fep,
2409 address& dep,
2410 address& vep) {
2411 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
2412 Label L;
2413 aep = __ pc(); __ push_ptr(); __ z_bru(L);
2414 fep = __ pc(); __ push_f(); __ z_bru(L);
2415 dep = __ pc(); __ push_d(); __ z_bru(L);
2416 lep = __ pc(); __ push_l(); __ z_bru(L);
2417 bep = cep = sep =
2418 iep = __ pc(); __ push_i();
2419 vep = __ pc();
2420 __ bind(L);
2421 generate_and_dispatch(t);
2422 }
2423
2424 //-----------------------------------------------------------------------------
2425
2426 #ifndef PRODUCT
2427 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
2428 address entry = __ pc();
2429 NearLabel counter_below_trace_threshold;
2430
2431 if (TraceBytecodesAt > 0) {
2432 // Skip runtime call, if the trace threshold is not yet reached.
2433 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value);
2434 __ load_absolute_address(Z_tmp_2, (address)&TraceBytecodesAt);
2435 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/);
2436 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/);
2437 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, counter_below_trace_threshold);
2438 }
2439
2440 int offset2 = state == ltos || state == dtos ? 2 : 1;
2441
2442 __ push(state);
2443 // Preserved return pointer is in Z_R14.
2444 // InterpreterRuntime::trace_bytecode() preserved and returns the value passed as second argument.
2445 __ z_lgr(Z_ARG2, Z_R14);
2446 __ z_lg(Z_ARG3, Address(Z_esp, Interpreter::expr_offset_in_bytes(0)));
2447 if (WizardMode) {
2448 __ z_lgr(Z_ARG4, Z_esp); // Trace Z_esp in WizardMode.
2449 } else {
2450 __ z_lg(Z_ARG4, Address(Z_esp, Interpreter::expr_offset_in_bytes(offset2)));
2451 }
2452 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), Z_ARG2, Z_ARG3, Z_ARG4);
2453 __ z_lgr(Z_R14, Z_RET); // Estore return address (see above).
2454 __ pop(state);
2455
2456 __ bind(counter_below_trace_threshold);
2457 __ z_br(Z_R14); // return
2458
2459 return entry;
2460 }
2461
2462 // Make feasible for old CPUs.
2463 void TemplateInterpreterGenerator::count_bytecode() {
2464 __ load_absolute_address(Z_R1_scratch, (address) &BytecodeCounter::_counter_value);
2465 __ add2mem_32(Address(Z_R1_scratch), 1, Z_R0_scratch);
2466 }
2467
2468 void TemplateInterpreterGenerator::histogram_bytecode(Template * t) {
2469 __ load_absolute_address(Z_R1_scratch, (address)&BytecodeHistogram::_counters[ t->bytecode() ]);
2470 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1);
2471 }
2472
2473 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template * t) {
2474 Address index_addr(Z_tmp_1, (intptr_t) 0);
2475 Register index = Z_tmp_2;
2476
2477 // Load previous index.
2478 __ load_absolute_address(Z_tmp_1, (address) &BytecodePairHistogram::_index);
2479 __ mem2reg_opt(index, index_addr, false);
2480
2481 // Mask with current bytecode and store as new previous index.
2482 __ z_srl(index, BytecodePairHistogram::log2_number_of_codes);
2483 __ load_const_optimized(Z_R0_scratch,
2484 (int)t->bytecode() << BytecodePairHistogram::log2_number_of_codes);
2485 __ z_or(index, Z_R0_scratch);
2486 __ reg2mem_opt(index, index_addr, false);
2487
2488 // Load counter array's address.
2489 __ z_lgfr(index, index); // Sign extend for addressing.
2490 __ z_sllg(index, index, LogBytesPerInt); // index2bytes
2491 __ load_absolute_address(Z_R1_scratch,
2492 (address) &BytecodePairHistogram::_counters);
2493 // Add index and increment counter.
2494 __ z_agr(Z_R1_scratch, index);
2495 __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1);
2496 }
2497
2498 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
2499 // Call a little run-time stub to avoid blow-up for each bytecode.
2500 // The run-time runtime saves the right registers, depending on
2501 // the tosca in-state for the given template.
2502 address entry = Interpreter::trace_code(t->tos_in());
2503 guarantee(entry != NULL, "entry must have been generated");
2504 __ call_stub(entry);
2505 }
2506
2507 void TemplateInterpreterGenerator::stop_interpreter_at() {
2508 NearLabel L;
2509
2510 __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value);
2511 __ load_absolute_address(Z_tmp_2, (address)&StopInterpreterAt);
2512 __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 4, false /*signed*/);
2513 __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/);
2514 __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, L);
2515 assert(Z_tmp_1->is_nonvolatile(), "must be nonvolatile to preserve Z_tos");
2516 assert(Z_F8->is_nonvolatile(), "must be nonvolatile to preserve Z_ftos");
2517 __ z_lgr(Z_tmp_1, Z_tos); // Save tos.
2518 __ z_lgr(Z_tmp_2, Z_bytecode); // Save Z_bytecode.
2519 __ z_ldr(Z_F8, Z_ftos); // Save ftos.
2520 // Use -XX:StopInterpreterAt=<num> to set the limit
2521 // and break at breakpoint().
2522 __ call_VM(noreg, CAST_FROM_FN_PTR(address, breakpoint), false);
2523 __ z_lgr(Z_tos, Z_tmp_1); // Restore tos.
2524 __ z_lgr(Z_bytecode, Z_tmp_2); // Save Z_bytecode.
2525 __ z_ldr(Z_ftos, Z_F8); // Restore ftos.
2526 __ bind(L);
2527 }
2528
2529 #endif // !PRODUCT