1 /*
2 * Copyright (c) 1998, 2016, 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 #ifndef SHARE_VM_CODE_CODEBLOB_HPP
26 #define SHARE_VM_CODE_CODEBLOB_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "compiler/compilerDefinitions.hpp"
30 #include "compiler/oopMap.hpp"
31 #include "runtime/frame.hpp"
32 #include "runtime/handles.hpp"
33 #include "utilities/align.hpp"
34 #include "utilities/macros.hpp"
35
36 // CodeBlob Types
37 // Used in the CodeCache to assign CodeBlobs to different CodeHeaps
38 struct CodeBlobType {
39 enum {
40 MethodNonProfiled = 0, // Execution level 1 and 4 (non-profiled) nmethods (including native nmethods)
41 MethodProfiled = 1, // Execution level 2 and 3 (profiled) nmethods
42 NonNMethod = 2, // Non-nmethods like Buffers, Adapters and Runtime Stubs
43 All = 3, // All types (No code cache segmentation)
44 AOT = 4, // AOT methods
45 NumTypes = 5 // Number of CodeBlobTypes
46 };
47 };
48
49 // CodeBlob - superclass for all entries in the CodeCache.
50 //
51 // Subtypes are:
52 // CompiledMethod : Compiled Java methods (include method that calls to native code)
53 // nmethod : JIT Compiled Java methods
54 // RuntimeBlob : Non-compiled method code; generated glue code
55 // RuntimeStub : Call to VM runtime methods
56 // DeoptimizationBlob : Used for deoptimization
57 // ExceptionBlob : Used for stack unrolling
58 // SafepointBlob : Used to handle illegal instruction exceptions
59 //
60 //
61 // Layout:
62 // - header
63 // - relocation
64 // - content space
65 // - instruction space
66 // - data space
67
68
69 class CodeBlobLayout;
70
71 class CodeBlob VALUE_OBJ_CLASS_SPEC {
72 friend class VMStructs;
73 friend class JVMCIVMStructs;
74 friend class CodeCacheDumper;
75
76 protected:
77
78 const CompilerType _type; // CompilerType
79 int _size; // total size of CodeBlob in bytes
80 int _header_size; // size of header (depends on subclass)
81 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have
82 // not finished setting up their frame. Beware of pc's in
83 // that range. There is a similar range(s) on returns
84 // which we don't detect.
85 int _data_offset; // offset to where data region begins
86 int _frame_size; // size of stack frame
87
88 address _code_begin;
89 address _code_end;
90 address _content_begin; // address to where content region begins (this includes consts, insts, stubs)
91 // address _content_end - not required, for all CodeBlobs _code_end == _content_end for now
92 address _data_end;
93 address _relocation_begin;
94 address _relocation_end;
95
96 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob
97 bool _caller_must_gc_arguments;
98 CodeStrings _strings;
99 const char* _name;
100 S390_ONLY(int _ctable_offset;)
101
102 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, int frame_complete_offset, int frame_size, ImmutableOopMapSet* oop_maps, bool caller_must_gc_arguments);
103 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, CodeBuffer* cb, int frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments);
104 public:
105 // Returns the space needed for CodeBlob
106 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
107 static unsigned int align_code_offset(int offset);
108
109 // Deletion
110 virtual void flush();
111
112 // Typing
113 virtual bool is_buffer_blob() const { return false; }
114 virtual bool is_nmethod() const { return false; }
115 virtual bool is_runtime_stub() const { return false; }
116 virtual bool is_deoptimization_stub() const { return false; }
117 virtual bool is_uncommon_trap_stub() const { return false; }
118 virtual bool is_exception_stub() const { return false; }
119 virtual bool is_safepoint_stub() const { return false; }
120 virtual bool is_adapter_blob() const { return false; }
121 virtual bool is_method_handles_adapter_blob() const { return false; }
122 virtual bool is_aot() const { return false; }
123 virtual bool is_compiled() const { return false; }
124
125 inline bool is_compiled_by_c1() const { return _type == compiler_c1; };
126 inline bool is_compiled_by_c2() const { return _type == compiler_c2; };
127 inline bool is_compiled_by_jvmci() const { return _type == compiler_jvmci; };
128 const char* compiler_name() const;
129
130 // Casting
131 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; }
132 nmethod* as_nmethod() { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
133 CompiledMethod* as_compiled_method_or_null() { return is_compiled() ? (CompiledMethod*) this : NULL; }
134 CompiledMethod* as_compiled_method() { assert(is_compiled(), "must be compiled"); return (CompiledMethod*) this; }
135 CodeBlob* as_codeblob_or_null() const { return (CodeBlob*) this; }
136
137 // Boundaries
138 address header_begin() const { return (address) this; }
139 relocInfo* relocation_begin() const { return (relocInfo*) _relocation_begin; };
140 relocInfo* relocation_end() const { return (relocInfo*) _relocation_end; }
141 address content_begin() const { return _content_begin; }
142 address content_end() const { return _code_end; } // _code_end == _content_end is true for all types of blobs for now, it is also checked in the constructor
143 address code_begin() const { return _code_begin; }
144 address code_end() const { return _code_end; }
145 address data_end() const { return _data_end; }
146
147 // This field holds the beginning of the const section in the old code buffer.
148 // It is needed to fix relocations of pc-relative loads when resizing the
149 // the constant pool or moving it.
150 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
151 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
152
153 // Sizes
154 int size() const { return _size; }
155 int header_size() const { return _header_size; }
156 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); }
157 int content_size() const { return content_end() - content_begin(); }
158 int code_size() const { return code_end() - code_begin(); }
159
160 // Containment
161 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); }
162 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
163 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
164 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
165 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
166
167 // CodeCache support: really only used by the nmethods, but in order to get
168 // asserts and certain bookkeeping to work in the CodeCache they are defined
169 // virtual here.
170 virtual bool is_zombie() const { return false; }
171 virtual bool is_locked_by_vm() const { return false; }
172
173 virtual bool is_unloaded() const { return false; }
174 virtual bool is_not_entrant() const { return false; }
175
176 // GC support
177 virtual bool is_alive() const = 0;
178
179 // OopMap for frame
180 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
181 void set_oop_maps(OopMapSet* p);
182 const ImmutableOopMap* oop_map_for_return_address(address return_address);
183 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) = 0;
184
185 // Frame support
186 int frame_size() const { return _frame_size; }
187 void set_frame_size(int size) { _frame_size = size; }
188
189 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
190 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
191
192 // Naming
193 const char* name() const { return _name; }
194 void set_name(const char* name) { _name = name; }
195
196 // Debugging
197 virtual void verify() = 0;
198 virtual void print() const { print_on(tty); };
199 virtual void print_on(outputStream* st) const;
200 virtual void print_value_on(outputStream* st) const;
201 void print_code();
202
203 // Print the comment associated with offset on stream, if there is one
204 virtual void print_block_comment(outputStream* stream, address block_begin) const {
205 intptr_t offset = (intptr_t)(block_begin - code_begin());
206 _strings.print_block_comment(stream, offset);
207 }
208
209 // Transfer ownership of comments to this CodeBlob
210 void set_strings(CodeStrings& strings) {
211 assert(!is_aot(), "invalid on aot");
212 _strings.assign(strings);
213 }
214
215 static ByteSize name_field_offset() {
216 return byte_offset_of(CodeBlob, _name);
217 }
218
219 static ByteSize oop_maps_field_offset() {
220 return byte_offset_of(CodeBlob, _oop_maps);
221 }
222 };
223
224 class CodeBlobLayout : public StackObj {
225 private:
226 int _size;
227 int _header_size;
228 int _relocation_size;
229 int _content_offset;
230 int _code_offset;
231 int _data_offset;
232 address _code_begin;
233 address _code_end;
234 address _content_begin;
235 address _content_end;
236 address _data_end;
237 address _relocation_begin;
238 address _relocation_end;
239
240 public:
241 CodeBlobLayout(address code_begin, address code_end, address content_begin, address content_end, address data_end, address relocation_begin, address relocation_end) :
242 _size(0),
243 _header_size(0),
244 _relocation_size(0),
245 _content_offset(0),
246 _code_offset(0),
247 _data_offset(0),
248 _content_begin(content_begin),
249 _content_end(content_end),
250 _code_begin(code_begin),
251 _code_end(code_end),
252 _data_end(data_end),
253 _relocation_begin(relocation_begin),
254 _relocation_end(relocation_end)
255 {
256 }
257
258 CodeBlobLayout(const address start, int size, int header_size, int relocation_size, int data_offset) :
259 _size(size),
260 _header_size(header_size),
261 _relocation_size(relocation_size),
262 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
263 _code_offset(_content_offset),
264 _data_offset(data_offset)
265 {
266 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
267
268 _code_begin = (address) start + _code_offset;
269 _code_end = (address) start + _data_offset;
270
271 _content_begin = (address) start + _content_offset;
272 _content_end = (address) start + _data_offset;
273
274 _data_end = (address) start + _size;
275 _relocation_begin = (address) start + _header_size;
276 _relocation_end = _relocation_begin + _relocation_size;
277 }
278
279 CodeBlobLayout(const address start, int size, int header_size, const CodeBuffer* cb) :
280 _size(size),
281 _header_size(header_size),
282 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
283 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
284 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
285 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize))
286 {
287 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
288
289 _code_begin = (address) start + _code_offset;
290 _code_end = (address) start + _data_offset;
291
292 _content_begin = (address) start + _content_offset;
293 _content_end = (address) start + _data_offset;
294
295 _data_end = (address) start + _size;
296 _relocation_begin = (address) start + _header_size;
297 _relocation_end = _relocation_begin + _relocation_size;
298 }
299
300 int size() const { return _size; }
301 int header_size() const { return _header_size; }
302 int relocation_size() const { return _relocation_size; }
303 int content_offset() const { return _content_offset; }
304 int code_offset() const { return _code_offset; }
305 int data_offset() const { return _data_offset; }
306 address code_begin() const { return _code_begin; }
307 address code_end() const { return _code_end; }
308 address data_end() const { return _data_end; }
309 address relocation_begin() const { return _relocation_begin; }
310 address relocation_end() const { return _relocation_end; }
311 address content_begin() const { return _content_begin; }
312 address content_end() const { return _content_end; }
313 };
314
315
316 class RuntimeBlob : public CodeBlob {
317 friend class VMStructs;
318 public:
319
320 // Creation
321 // a) simple CodeBlob
322 // frame_complete is the offset from the beginning of the instructions
323 // to where the frame setup (from stackwalk viewpoint) is complete.
324 RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size);
325
326 // b) full CodeBlob
327 RuntimeBlob(
328 const char* name,
329 CodeBuffer* cb,
330 int header_size,
331 int size,
332 int frame_complete,
333 int frame_size,
334 OopMapSet* oop_maps,
335 bool caller_must_gc_arguments = false
336 );
337
338 // GC support
339 virtual bool is_alive() const = 0;
340
341 void verify();
342
343 // OopMap for frame
344 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); }
345
346 // Debugging
347 void print() const { print_on(tty); }
348 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); }
349 virtual void print_value_on(outputStream* st) const { CodeBlob::print_value_on(st); }
350
351 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
352 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
353 };
354
355 class WhiteBox;
356 //----------------------------------------------------------------------------------------------------
357 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
358
359 class BufferBlob: public RuntimeBlob {
360 friend class VMStructs;
361 friend class AdapterBlob;
362 friend class MethodHandlesAdapterBlob;
363 friend class WhiteBox;
364
365 private:
366 // Creation support
367 BufferBlob(const char* name, int size);
368 BufferBlob(const char* name, int size, CodeBuffer* cb);
369
370 void* operator new(size_t s, unsigned size) throw();
371
372 public:
373 // Creation
374 static BufferBlob* create(const char* name, int buffer_size);
375 static BufferBlob* create(const char* name, CodeBuffer* cb);
376
377 static void free(BufferBlob* buf);
378
379 // Typing
380 virtual bool is_buffer_blob() const { return true; }
381
382 // GC/Verification support
383 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
384 bool is_alive() const { return true; }
385
386 void verify();
387 void print_on(outputStream* st) const;
388 void print_value_on(outputStream* st) const;
389 };
390
391
392 //----------------------------------------------------------------------------------------------------
393 // AdapterBlob: used to hold C2I/I2C adapters
394
395 class AdapterBlob: public BufferBlob {
396 private:
397 AdapterBlob(int size, CodeBuffer* cb);
398
399 public:
400 // Creation
401 static AdapterBlob* create(CodeBuffer* cb);
402
403 // Typing
404 virtual bool is_adapter_blob() const { return true; }
405 };
406
407
408 //----------------------------------------------------------------------------------------------------
409 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
410
411 class MethodHandlesAdapterBlob: public BufferBlob {
412 private:
413 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {}
414
415 public:
416 // Creation
417 static MethodHandlesAdapterBlob* create(int buffer_size);
418
419 // Typing
420 virtual bool is_method_handles_adapter_blob() const { return true; }
421 };
422
423
424 //----------------------------------------------------------------------------------------------------
425 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
426
427 class RuntimeStub: public RuntimeBlob {
428 friend class VMStructs;
429 private:
430 // Creation support
431 RuntimeStub(
432 const char* name,
433 CodeBuffer* cb,
434 int size,
435 int frame_complete,
436 int frame_size,
437 OopMapSet* oop_maps,
438 bool caller_must_gc_arguments
439 );
440
441 void* operator new(size_t s, unsigned size) throw();
442
443 public:
444 // Creation
445 static RuntimeStub* new_runtime_stub(
446 const char* stub_name,
447 CodeBuffer* cb,
448 int frame_complete,
449 int frame_size,
450 OopMapSet* oop_maps,
451 bool caller_must_gc_arguments
452 );
453
454 // Typing
455 bool is_runtime_stub() const { return true; }
456
457 address entry_point() const { return code_begin(); }
458
459 // GC/Verification support
460 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
461 bool is_alive() const { return true; }
462
463 void verify();
464 void print_on(outputStream* st) const;
465 void print_value_on(outputStream* st) const;
466 };
467
468
469 //----------------------------------------------------------------------------------------------------
470 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
471
472 class SingletonBlob: public RuntimeBlob {
473 friend class VMStructs;
474
475 protected:
476 void* operator new(size_t s, unsigned size) throw();
477
478 public:
479 SingletonBlob(
480 const char* name,
481 CodeBuffer* cb,
482 int header_size,
483 int size,
484 int frame_size,
485 OopMapSet* oop_maps
486 )
487 : RuntimeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
488 {};
489
490 address entry_point() { return code_begin(); }
491
492 bool is_alive() const { return true; }
493
494 // GC/Verification support
495 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
496 void verify(); // does nothing
497 void print_on(outputStream* st) const;
498 void print_value_on(outputStream* st) const;
499 };
500
501
502 //----------------------------------------------------------------------------------------------------
503 // DeoptimizationBlob
504
505 class DeoptimizationBlob: public SingletonBlob {
506 friend class VMStructs;
507 friend class JVMCIVMStructs;
508 private:
509 int _unpack_offset;
510 int _unpack_with_exception;
511 int _unpack_with_reexecution;
512
513 int _unpack_with_exception_in_tls;
514
515 #if INCLUDE_JVMCI
516 // Offsets when JVMCI calls uncommon_trap.
517 int _uncommon_trap_offset;
518 int _implicit_exception_uncommon_trap_offset;
519 #endif
520
521 // Creation support
522 DeoptimizationBlob(
523 CodeBuffer* cb,
524 int size,
525 OopMapSet* oop_maps,
526 int unpack_offset,
527 int unpack_with_exception_offset,
528 int unpack_with_reexecution_offset,
529 int frame_size
530 );
531
532 public:
533 // Creation
534 static DeoptimizationBlob* create(
535 CodeBuffer* cb,
536 OopMapSet* oop_maps,
537 int unpack_offset,
538 int unpack_with_exception_offset,
539 int unpack_with_reexecution_offset,
540 int frame_size
541 );
542
543 // Typing
544 bool is_deoptimization_stub() const { return true; }
545 bool exception_address_is_unpack_entry(address pc) const {
546 address unpack_pc = unpack();
547 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);
548 }
549
550 // GC for args
551 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
552
553 // Printing
554 void print_value_on(outputStream* st) const;
555
556 address unpack() const { return code_begin() + _unpack_offset; }
557 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
558 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
559
560 // Alternate entry point for C1 where the exception and issuing pc
561 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
562 // instead of being in registers. This is needed because C1 doesn't
563 // model exception paths in a way that keeps these registers free so
564 // there may be live values in those registers during deopt.
565 void set_unpack_with_exception_in_tls_offset(int offset) {
566 _unpack_with_exception_in_tls = offset;
567 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
568 }
569 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
570
571 #if INCLUDE_JVMCI
572 // Offsets when JVMCI calls uncommon_trap.
573 void set_uncommon_trap_offset(int offset) {
574 _uncommon_trap_offset = offset;
575 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
576 }
577 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
578
579 void set_implicit_exception_uncommon_trap_offset(int offset) {
580 _implicit_exception_uncommon_trap_offset = offset;
581 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
582 }
583 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
584 #endif // INCLUDE_JVMCI
585 };
586
587
588 //----------------------------------------------------------------------------------------------------
589 // UncommonTrapBlob (currently only used by Compiler 2)
590
591 #ifdef COMPILER2
592
593 class UncommonTrapBlob: public SingletonBlob {
594 friend class VMStructs;
595 private:
596 // Creation support
597 UncommonTrapBlob(
598 CodeBuffer* cb,
599 int size,
600 OopMapSet* oop_maps,
601 int frame_size
602 );
603
604 public:
605 // Creation
606 static UncommonTrapBlob* create(
607 CodeBuffer* cb,
608 OopMapSet* oop_maps,
609 int frame_size
610 );
611
612 // GC for args
613 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
614
615 // Typing
616 bool is_uncommon_trap_stub() const { return true; }
617 };
618
619
620 //----------------------------------------------------------------------------------------------------
621 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
622
623 class ExceptionBlob: public SingletonBlob {
624 friend class VMStructs;
625 private:
626 // Creation support
627 ExceptionBlob(
628 CodeBuffer* cb,
629 int size,
630 OopMapSet* oop_maps,
631 int frame_size
632 );
633
634 public:
635 // Creation
636 static ExceptionBlob* create(
637 CodeBuffer* cb,
638 OopMapSet* oop_maps,
639 int frame_size
640 );
641
642 // GC for args
643 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
644
645 // Typing
646 bool is_exception_stub() const { return true; }
647 };
648 #endif // COMPILER2
649
650
651 //----------------------------------------------------------------------------------------------------
652 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
653
654 class SafepointBlob: public SingletonBlob {
655 friend class VMStructs;
656 private:
657 // Creation support
658 SafepointBlob(
659 CodeBuffer* cb,
660 int size,
661 OopMapSet* oop_maps,
662 int frame_size
663 );
664
665 public:
666 // Creation
667 static SafepointBlob* create(
668 CodeBuffer* cb,
669 OopMapSet* oop_maps,
670 int frame_size
671 );
672
673 // GC for args
674 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
675
676 // Typing
677 bool is_safepoint_stub() const { return true; }
678 };
679
680 #endif // SHARE_VM_CODE_CODEBLOB_HPP