1 /*
  2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
  3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  4  *
  5  * This code is free software; you can redistribute it and/or modify it
  6  * under the terms of the GNU General Public License version 2 only, as
  7  * published by the Free Software Foundation.
  8  *
  9  * This code is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 12  * version 2 for more details (a copy is included in the LICENSE file that
 13  * accompanied this code).
 14  *
 15  * You should have received a copy of the GNU General Public License version
 16  * 2 along with this work; if not, write to the Free Software Foundation,
 17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 20  * or visit www.oracle.com if you need additional information or have any
 21  * questions.
 22  *
 23  */
 24 
 25 #include "precompiled.hpp"
 26 #include "asm/macroAssembler.inline.hpp"
 27 #include "gc/g1/g1BarrierSet.hpp"
 28 #include "gc/g1/g1BarrierSetAssembler.hpp"
 29 #include "gc/g1/g1BarrierSetRuntime.hpp"
 30 #include "gc/g1/g1CardTable.hpp"
 31 #include "gc/g1/g1ThreadLocalData.hpp"
 32 #include "gc/g1/heapRegion.hpp"
 33 #include "interpreter/interp_masm.hpp"
 34 #include "runtime/sharedRuntime.hpp"
 35 #include "utilities/debug.hpp"
 36 #include "utilities/macros.hpp"
 37 #ifdef COMPILER1
 38 #include "c1/c1_LIRAssembler.hpp"
 39 #include "c1/c1_MacroAssembler.hpp"
 40 #include "gc/g1/c1/g1BarrierSetC1.hpp"
 41 #endif
 42 
 43 #define __ masm->
 44 
 45 void G1BarrierSetAssembler::gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators,
 46                                                             Register addr, Register count) {
 47   bool dest_uninitialized = (decorators & IS_DEST_UNINITIALIZED) != 0;
 48 
 49   if (!dest_uninitialized) {
 50     Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
 51 #ifndef _LP64
 52     __ push(thread);
 53     __ get_thread(thread);
 54 #endif
 55 
 56     Label filtered;
 57     Address in_progress(thread, in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset()));
 58     // Is marking active?
 59     if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
 60       __ cmpl(in_progress, 0);
 61     } else {
 62       assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
 63       __ cmpb(in_progress, 0);
 64     }
 65 
 66     NOT_LP64(__ pop(thread);)
 67 
 68     __ jcc(Assembler::equal, filtered);
 69 
 70     __ pusha();                      // push registers
 71 #ifdef _LP64
 72     if (count == c_rarg0) {
 73       if (addr == c_rarg1) {
 74         // exactly backwards!!
 75         __ xchgptr(c_rarg1, c_rarg0);
 76       } else {
 77         __ movptr(c_rarg1, count);
 78         __ movptr(c_rarg0, addr);
 79       }
 80     } else {
 81       __ movptr(c_rarg0, addr);
 82       __ movptr(c_rarg1, count);
 83     }
 84     if (UseCompressedOops) {
 85       __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_array_pre_narrow_oop_entry), 2);
 86     } else {
 87       __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_array_pre_oop_entry), 2);
 88     }
 89 #else
 90     __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_array_pre_oop_entry),
 91                     addr, count);
 92 #endif
 93     __ popa();
 94 
 95     __ bind(filtered);
 96   }
 97 }
 98 
 99 void G1BarrierSetAssembler::gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators,
100                                                              Register addr, Register count, Register tmp) {
101   __ pusha();             // push registers (overkill)
102 #ifdef _LP64
103   if (c_rarg0 == count) { // On win64 c_rarg0 == rcx
104     assert_different_registers(c_rarg1, addr);
105     __ mov(c_rarg1, count);
106     __ mov(c_rarg0, addr);
107   } else {
108     assert_different_registers(c_rarg0, count);
109     __ mov(c_rarg0, addr);
110     __ mov(c_rarg1, count);
111   }
112   __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_array_post_entry), 2);
113 #else
114   __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_array_post_entry),
115                   addr, count);
116 #endif
117   __ popa();
118 }
119 
120 void G1BarrierSetAssembler::load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
121                                     Register dst, Address src, Register tmp1, Register tmp_thread) {
122   bool on_oop = is_reference_type(type);
123   bool on_weak = (decorators & ON_WEAK_OOP_REF) != 0;
124   bool on_phantom = (decorators & ON_PHANTOM_OOP_REF) != 0;
125   bool on_reference = on_weak || on_phantom;
126   ModRefBarrierSetAssembler::load_at(masm, decorators, type, dst, src, tmp1, tmp_thread);
127   if (on_oop && on_reference) {
128     const Register thread = NOT_LP64(tmp_thread) LP64_ONLY(r15_thread);
129     NOT_LP64(__ get_thread(thread));
















130 
131     // Generate the G1 pre-barrier code to log the value of
132     // the referent field in an SATB buffer.
133     g1_write_barrier_pre(masm /* masm */,
134                          noreg /* obj */,
135                          dst /* pre_val */,
136                          thread /* thread */,
137                          tmp1 /* tmp */,
138                          true /* tosca_live */,
139                          true /* expand_call */);




140   }
141 }
142 
143 void G1BarrierSetAssembler::g1_write_barrier_pre(MacroAssembler* masm,
144                                                  Register obj,
145                                                  Register pre_val,
146                                                  Register thread,
147                                                  Register tmp,
148                                                  bool tosca_live,
149                                                  bool expand_call) {
150   // If expand_call is true then we expand the call_VM_leaf macro
151   // directly to skip generating the check by
152   // InterpreterMacroAssembler::call_VM_leaf_base that checks _last_sp.
153 
154 #ifdef _LP64
155   assert(thread == r15_thread, "must be");
156 #endif // _LP64
157 
158   Label done;
159   Label runtime;
160 
161   assert(pre_val != noreg, "check this code");
162 
163   if (obj != noreg) {
164     assert_different_registers(obj, pre_val, tmp);
165     assert(pre_val != rax, "check this code");
166   }
167 
168   Address in_progress(thread, in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset()));
169   Address index(thread, in_bytes(G1ThreadLocalData::satb_mark_queue_index_offset()));
170   Address buffer(thread, in_bytes(G1ThreadLocalData::satb_mark_queue_buffer_offset()));
171 
172   // Is marking active?
173   if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
174     __ cmpl(in_progress, 0);
175   } else {
176     assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
177     __ cmpb(in_progress, 0);
178   }
179   __ jcc(Assembler::equal, done);
180 
181   // Do we need to load the previous value?
182   if (obj != noreg) {
183     __ load_heap_oop(pre_val, Address(obj, 0), noreg, noreg, AS_RAW);
184   }
185 
186   // Is the previous value null?
187   __ cmpptr(pre_val, (int32_t) NULL_WORD);
188   __ jcc(Assembler::equal, done);
189 
190   // Can we store original value in the thread's buffer?
191   // Is index == 0?
192   // (The index field is typed as size_t.)
193 
194   __ movptr(tmp, index);                   // tmp := *index_adr
195   __ cmpptr(tmp, 0);                       // tmp == 0?
196   __ jcc(Assembler::equal, runtime);       // If yes, goto runtime
197 
198   __ subptr(tmp, wordSize);                // tmp := tmp - wordSize
199   __ movptr(index, tmp);                   // *index_adr := tmp
200   __ addptr(tmp, buffer);                  // tmp := tmp + *buffer_adr
201 
202   // Record the previous value
203   __ movptr(Address(tmp, 0), pre_val);
204   __ jmp(done);
205 
206   __ bind(runtime);
207   // save the live input values
208   if(tosca_live) __ push(rax);
209 
210   if (obj != noreg && obj != rax)
211     __ push(obj);
212 
213   if (pre_val != rax)
214     __ push(pre_val);
215 
216   // Calling the runtime using the regular call_VM_leaf mechanism generates
217   // code (generated by InterpreterMacroAssember::call_VM_leaf_base)
218   // that checks that the *(ebp+frame::interpreter_frame_last_sp) == NULL.
219   //
220   // If we care generating the pre-barrier without a frame (e.g. in the
221   // intrinsified Reference.get() routine) then ebp might be pointing to
222   // the caller frame and so this check will most likely fail at runtime.
223   //
224   // Expanding the call directly bypasses the generation of the check.
225   // So when we do not have have a full interpreter frame on the stack
226   // expand_call should be passed true.
227 
228   NOT_LP64( __ push(thread); )
229 
230   if (expand_call) {
231     LP64_ONLY( assert(pre_val != c_rarg1, "smashed arg"); )
232 #ifdef _LP64
233     if (c_rarg1 != thread) {
234       __ mov(c_rarg1, thread);
235     }
236     if (c_rarg0 != pre_val) {
237       __ mov(c_rarg0, pre_val);
238     }
239 #else
240     __ push(thread);
241     __ push(pre_val);
242 #endif
243     __ MacroAssembler::call_VM_leaf_base(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_pre_entry), 2);
244   } else {
245     __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_pre_entry), pre_val, thread);
246   }
247 
248   NOT_LP64( __ pop(thread); )
249 
250   // save the live input values
251   if (pre_val != rax)
252     __ pop(pre_val);
253 
254   if (obj != noreg && obj != rax)
255     __ pop(obj);
256 
257   if(tosca_live) __ pop(rax);
258 
259   __ bind(done);
260 }
261 
262 void G1BarrierSetAssembler::g1_write_barrier_post(MacroAssembler* masm,
263                                                   Register store_addr,
264                                                   Register new_val,
265                                                   Register thread,
266                                                   Register tmp,
267                                                   Register tmp2) {
268   // Generated code assumes that buffer index is pointer sized.
269   STATIC_ASSERT(in_bytes(SATBMarkQueue::byte_width_of_index()) == sizeof(intptr_t));
270 #ifdef _LP64
271   assert(thread == r15_thread, "must be");
272 #endif // _LP64
273 
274   Address queue_index(thread, in_bytes(G1ThreadLocalData::dirty_card_queue_index_offset()));
275   Address buffer(thread, in_bytes(G1ThreadLocalData::dirty_card_queue_buffer_offset()));
276 
277   CardTableBarrierSet* ct =
278     barrier_set_cast<CardTableBarrierSet>(BarrierSet::barrier_set());
279 
280   Label done;
281   Label runtime;
282 
283   // Does store cross heap regions?
284 
285   __ movptr(tmp, store_addr);
286   __ xorptr(tmp, new_val);
287   __ shrptr(tmp, HeapRegion::LogOfHRGrainBytes);
288   __ jcc(Assembler::equal, done);
289 
290   // crosses regions, storing NULL?
291 
292   __ cmpptr(new_val, (int32_t) NULL_WORD);
293   __ jcc(Assembler::equal, done);
294 
295   // storing region crossing non-NULL, is card already dirty?
296 
297   const Register card_addr = tmp;
298   const Register cardtable = tmp2;
299 
300   __ movptr(card_addr, store_addr);
301   __ shrptr(card_addr, CardTable::card_shift);
302   // Do not use ExternalAddress to load 'byte_map_base', since 'byte_map_base' is NOT
303   // a valid address and therefore is not properly handled by the relocation code.
304   __ movptr(cardtable, (intptr_t)ct->card_table()->byte_map_base());
305   __ addptr(card_addr, cardtable);
306 
307   __ cmpb(Address(card_addr, 0), (int)G1CardTable::g1_young_card_val());
308   __ jcc(Assembler::equal, done);
309 
310   __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
311   __ cmpb(Address(card_addr, 0), (int)G1CardTable::dirty_card_val());
312   __ jcc(Assembler::equal, done);
313 
314 
315   // storing a region crossing, non-NULL oop, card is clean.
316   // dirty card and log.
317 
318   __ movb(Address(card_addr, 0), (int)G1CardTable::dirty_card_val());
319 
320   __ movptr(tmp2, queue_index);
321   __ testptr(tmp2, tmp2);
322   __ jcc(Assembler::zero, runtime);
323   __ subptr(tmp2, wordSize);
324   __ movptr(queue_index, tmp2);
325   __ addptr(tmp2, buffer);
326   __ movptr(Address(tmp2, 0), card_addr);
327   __ jmp(done);
328 
329   __ bind(runtime);
330   // save the live input values
331   __ push(store_addr);
332 #ifdef _LP64
333   __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_post_entry), card_addr, r15_thread);
334 #else
335   __ push(thread);
336   __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_post_entry), card_addr, thread);
337   __ pop(thread);
338 #endif
339   __ pop(store_addr);
340 
341   __ bind(done);
342 }
343 
344 void G1BarrierSetAssembler::oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
345                                          Address dst, Register val, Register tmp1, Register tmp2) {
346   bool in_heap = (decorators & IN_HEAP) != 0;
347   bool as_normal = (decorators & AS_NORMAL) != 0;
348   assert((decorators & IS_DEST_UNINITIALIZED) == 0, "unsupported");
349 
350   bool needs_pre_barrier = as_normal;
351   bool needs_post_barrier = val != noreg && in_heap;
352 
353   Register tmp3 = LP64_ONLY(r8) NOT_LP64(rsi);
354   Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
355   // flatten object address if needed
356   // We do it regardless of precise because we need the registers
357   if (dst.index() == noreg && dst.disp() == 0) {
358     if (dst.base() != tmp1) {
359       __ movptr(tmp1, dst.base());
360     }
361   } else {
362     __ lea(tmp1, dst);
363   }
364 
365 #ifndef _LP64
366   InterpreterMacroAssembler *imasm = static_cast<InterpreterMacroAssembler*>(masm);
367 #endif
368 
369   NOT_LP64(__ get_thread(rcx));
370   NOT_LP64(imasm->save_bcp());
371 
372   if (needs_pre_barrier) {
373     g1_write_barrier_pre(masm /*masm*/,
374                          tmp1 /* obj */,
375                          tmp2 /* pre_val */,
376                          rthread /* thread */,
377                          tmp3  /* tmp */,
378                          val != noreg /* tosca_live */,
379                          false /* expand_call */);
380   }
381   if (val == noreg) {
382     BarrierSetAssembler::store_at(masm, decorators, type, Address(tmp1, 0), val, noreg, noreg);
383   } else {
384     Register new_val = val;
385     if (needs_post_barrier) {
386       // G1 barrier needs uncompressed oop for region cross check.
387       if (UseCompressedOops) {
388         new_val = tmp2;
389         __ movptr(new_val, val);
390       }
391     }
392     BarrierSetAssembler::store_at(masm, decorators, type, Address(tmp1, 0), val, noreg, noreg);
393     if (needs_post_barrier) {
394       g1_write_barrier_post(masm /*masm*/,
395                             tmp1 /* store_adr */,
396                             new_val /* new_val */,
397                             rthread /* thread */,
398                             tmp3 /* tmp */,
399                             tmp2 /* tmp2 */);
400     }
401   }
402   NOT_LP64(imasm->restore_bcp());
403 }
404 
405 #ifdef COMPILER1
406 
407 #undef __
408 #define __ ce->masm()->
409 
410 void G1BarrierSetAssembler::gen_pre_barrier_stub(LIR_Assembler* ce, G1PreBarrierStub* stub) {
411   G1BarrierSetC1* bs = (G1BarrierSetC1*)BarrierSet::barrier_set()->barrier_set_c1();
412   // At this point we know that marking is in progress.
413   // If do_load() is true then we have to emit the
414   // load of the previous value; otherwise it has already
415   // been loaded into _pre_val.
416 
417   __ bind(*stub->entry());
418   assert(stub->pre_val()->is_register(), "Precondition.");
419 
420   Register pre_val_reg = stub->pre_val()->as_register();
421 
422   if (stub->do_load()) {
423     ce->mem2reg(stub->addr(), stub->pre_val(), T_OBJECT, stub->patch_code(), stub->info(), false /*wide*/);
424   }
425 
426   __ cmpptr(pre_val_reg, (int32_t)NULL_WORD);
427   __ jcc(Assembler::equal, *stub->continuation());
428   ce->store_parameter(stub->pre_val()->as_register(), 0);
429   __ call(RuntimeAddress(bs->pre_barrier_c1_runtime_code_blob()->code_begin()));
430   __ jmp(*stub->continuation());
431 
432 }
433 
434 void G1BarrierSetAssembler::gen_post_barrier_stub(LIR_Assembler* ce, G1PostBarrierStub* stub) {
435   G1BarrierSetC1* bs = (G1BarrierSetC1*)BarrierSet::barrier_set()->barrier_set_c1();
436   __ bind(*stub->entry());
437   assert(stub->addr()->is_register(), "Precondition.");
438   assert(stub->new_val()->is_register(), "Precondition.");
439   Register new_val_reg = stub->new_val()->as_register();
440   __ cmpptr(new_val_reg, (int32_t) NULL_WORD);
441   __ jcc(Assembler::equal, *stub->continuation());
442   ce->store_parameter(stub->addr()->as_pointer_register(), 0);
443   __ call(RuntimeAddress(bs->post_barrier_c1_runtime_code_blob()->code_begin()));
444   __ jmp(*stub->continuation());
445 }
446 
447 #undef __
448 
449 #define __ sasm->
450 
451 void G1BarrierSetAssembler::generate_c1_pre_barrier_runtime_stub(StubAssembler* sasm) {
452   // Generated code assumes that buffer index is pointer sized.
453   STATIC_ASSERT(in_bytes(SATBMarkQueue::byte_width_of_index()) == sizeof(intptr_t));
454 
455   __ prologue("g1_pre_barrier", false);
456   // arg0 : previous value of memory
457 
458   __ push(rax);
459   __ push(rdx);
460 
461   const Register pre_val = rax;
462   const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
463   const Register tmp = rdx;
464 
465   NOT_LP64(__ get_thread(thread);)
466 
467   Address queue_active(thread, in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset()));
468   Address queue_index(thread, in_bytes(G1ThreadLocalData::satb_mark_queue_index_offset()));
469   Address buffer(thread, in_bytes(G1ThreadLocalData::satb_mark_queue_buffer_offset()));
470 
471   Label done;
472   Label runtime;
473 
474   // Is marking still active?
475   if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
476     __ cmpl(queue_active, 0);
477   } else {
478     assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
479     __ cmpb(queue_active, 0);
480   }
481   __ jcc(Assembler::equal, done);
482 
483   // Can we store original value in the thread's buffer?
484 
485   __ movptr(tmp, queue_index);
486   __ testptr(tmp, tmp);
487   __ jcc(Assembler::zero, runtime);
488   __ subptr(tmp, wordSize);
489   __ movptr(queue_index, tmp);
490   __ addptr(tmp, buffer);
491 
492   // prev_val (rax)
493   __ load_parameter(0, pre_val);
494   __ movptr(Address(tmp, 0), pre_val);
495   __ jmp(done);
496 
497   __ bind(runtime);
498 
499   __ save_live_registers_no_oop_map(true);
500 
501   // load the pre-value
502   __ load_parameter(0, rcx);
503   __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_pre_entry), rcx, thread);
504 
505   __ restore_live_registers(true);
506 
507   __ bind(done);
508 
509   __ pop(rdx);
510   __ pop(rax);
511 
512   __ epilogue();
513 }
514 
515 void G1BarrierSetAssembler::generate_c1_post_barrier_runtime_stub(StubAssembler* sasm) {
516   __ prologue("g1_post_barrier", false);
517 
518   // arg0: store_address
519   Address store_addr(rbp, 2*BytesPerWord);
520 
521   CardTableBarrierSet* ct =
522     barrier_set_cast<CardTableBarrierSet>(BarrierSet::barrier_set());
523 
524   Label done;
525   Label enqueued;
526   Label runtime;
527 
528   // At this point we know new_value is non-NULL and the new_value crosses regions.
529   // Must check to see if card is already dirty
530 
531   const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
532 
533   Address queue_index(thread, in_bytes(G1ThreadLocalData::dirty_card_queue_index_offset()));
534   Address buffer(thread, in_bytes(G1ThreadLocalData::dirty_card_queue_buffer_offset()));
535 
536   __ push(rax);
537   __ push(rcx);
538 
539   const Register cardtable = rax;
540   const Register card_addr = rcx;
541 
542   __ load_parameter(0, card_addr);
543   __ shrptr(card_addr, CardTable::card_shift);
544   // Do not use ExternalAddress to load 'byte_map_base', since 'byte_map_base' is NOT
545   // a valid address and therefore is not properly handled by the relocation code.
546   __ movptr(cardtable, (intptr_t)ct->card_table()->byte_map_base());
547   __ addptr(card_addr, cardtable);
548 
549   NOT_LP64(__ get_thread(thread);)
550 
551   __ cmpb(Address(card_addr, 0), (int)G1CardTable::g1_young_card_val());
552   __ jcc(Assembler::equal, done);
553 
554   __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
555   __ cmpb(Address(card_addr, 0), (int)CardTable::dirty_card_val());
556   __ jcc(Assembler::equal, done);
557 
558   // storing region crossing non-NULL, card is clean.
559   // dirty card and log.
560 
561   __ movb(Address(card_addr, 0), (int)CardTable::dirty_card_val());
562 
563   const Register tmp = rdx;
564   __ push(rdx);
565 
566   __ movptr(tmp, queue_index);
567   __ testptr(tmp, tmp);
568   __ jcc(Assembler::zero, runtime);
569   __ subptr(tmp, wordSize);
570   __ movptr(queue_index, tmp);
571   __ addptr(tmp, buffer);
572   __ movptr(Address(tmp, 0), card_addr);
573   __ jmp(enqueued);
574 
575   __ bind(runtime);
576 
577   __ save_live_registers_no_oop_map(true);
578 
579   __ call_VM_leaf(CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_post_entry), card_addr, thread);
580 
581   __ restore_live_registers(true);
582 
583   __ bind(enqueued);
584   __ pop(rdx);
585 
586   __ bind(done);
587   __ pop(rcx);
588   __ pop(rax);
589 
590   __ epilogue();
591 }
592 
593 #undef __
594 
595 #endif // COMPILER1
--- EOF ---