1 /*
2 * Copyright (c) 1998, 2018, 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 // AOTCompiledMethod : AOT Compiled Java methods - Not in the CodeCache!
55 // AOTCompiledMethod objects are allocated in the C-Heap, the code they
56 // point to is allocated in the AOTCodeHeap which is in the C-Heap as
57 // well (i.e. it's the memory where the shared library was loaded to)
58 // RuntimeBlob : Non-compiled method code; generated glue code
59 // BufferBlob : Used for non-relocatable code such as interpreter, stubroutines, etc.
60 // AdapterBlob : Used to hold C2I/I2C adapters
61 // VtableBlob : Used for holding vtable chunks
62 // MethodHandlesAdapterBlob : Used to hold MethodHandles adapters
63 // RuntimeStub : Call to VM runtime methods
64 // SingletonBlob : Super-class for all blobs that exist in only one instance
65 // DeoptimizationBlob : Used for deoptimization
66 // ExceptionBlob : Used for stack unrolling
67 // SafepointBlob : Used to handle illegal instruction exceptions
68 // UncommonTrapBlob : Used to handle uncommon traps
69 //
70 //
71 // Layout (all except AOTCompiledMethod) : continuous in the CodeCache
72 // - header
73 // - relocation
74 // - content space
75 // - instruction space
76 // - data space
77 //
78 // Layout (AOTCompiledMethod) : in the C-Heap
79 // - header -\
80 // ... |
81 // - code <-/
82
83
84 class CodeBlobLayout;
85
86 class CodeBlob {
87 friend class VMStructs;
88 friend class JVMCIVMStructs;
89 friend class CodeCacheDumper;
90
91 protected:
92
93 const CompilerType _type; // CompilerType
94 int _size; // total size of CodeBlob in bytes
95 int _header_size; // size of header (depends on subclass)
96 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have
97 // not finished setting up their frame. Beware of pc's in
98 // that range. There is a similar range(s) on returns
99 // which we don't detect.
100 int _data_offset; // offset to where data region begins
101 int _frame_size; // size of stack frame
102
103 address _code_begin;
104 address _code_end;
105 address _content_begin; // address to where content region begins (this includes consts, insts, stubs)
106 // address _content_end - not required, for all CodeBlobs _code_end == _content_end for now
107 address _data_end;
108 address _relocation_begin;
109 address _relocation_end;
110
111 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob
112 bool _caller_must_gc_arguments;
113 CodeStrings _strings;
114 const char* _name;
115 S390_ONLY(int _ctable_offset;)
116
117 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, int frame_complete_offset, int frame_size, ImmutableOopMapSet* oop_maps, bool caller_must_gc_arguments);
118 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);
119 public:
120 // Returns the space needed for CodeBlob
121 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
122 static unsigned int align_code_offset(int offset);
123
124 // Deletion
125 virtual void flush();
126
127 // Typing
128 virtual bool is_buffer_blob() const { return false; }
129 virtual bool is_nmethod() const { return false; }
130 virtual bool is_runtime_stub() const { return false; }
131 virtual bool is_deoptimization_stub() const { return false; }
132 virtual bool is_uncommon_trap_stub() const { return false; }
133 virtual bool is_exception_stub() const { return false; }
134 virtual bool is_safepoint_stub() const { return false; }
135 virtual bool is_adapter_blob() const { return false; }
136 virtual bool is_vtable_blob() const { return false; }
137 virtual bool is_method_handles_adapter_blob() const { return false; }
138 virtual bool is_aot() const { return false; }
139 virtual bool is_compiled() const { return false; }
140
141 inline bool is_compiled_by_c1() const { return _type == compiler_c1; };
142 inline bool is_compiled_by_c2() const { return _type == compiler_c2; };
143 inline bool is_compiled_by_jvmci() const { return _type == compiler_jvmci; };
144 const char* compiler_name() const;
145
146 // Casting
147 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; }
148 nmethod* as_nmethod() { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
149 CompiledMethod* as_compiled_method_or_null() { return is_compiled() ? (CompiledMethod*) this : NULL; }
150 CompiledMethod* as_compiled_method() { assert(is_compiled(), "must be compiled"); return (CompiledMethod*) this; }
151 CodeBlob* as_codeblob_or_null() const { return (CodeBlob*) this; }
152
153 // Boundaries
154 address header_begin() const { return (address) this; }
155 relocInfo* relocation_begin() const { return (relocInfo*) _relocation_begin; };
156 relocInfo* relocation_end() const { return (relocInfo*) _relocation_end; }
157 address content_begin() const { return _content_begin; }
158 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
159 address code_begin() const { return _code_begin; }
160 address code_end() const { return _code_end; }
161 address data_end() const { return _data_end; }
162
163 // This field holds the beginning of the const section in the old code buffer.
164 // It is needed to fix relocations of pc-relative loads when resizing the
165 // the constant pool or moving it.
166 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
167 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
168
169 // Sizes
170 int size() const { return _size; }
171 int header_size() const { return _header_size; }
172 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); }
173 int content_size() const { return content_end() - content_begin(); }
174 int code_size() const { return code_end() - code_begin(); }
175 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed
176 void adjust_size(size_t used) {
177 _size = (int)used;
178 _data_offset = (int)used;
179 _code_end = (address)this + used;
180 _data_end = (address)this + used;
181 }
182
183 // Containment
184 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); }
185 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
186 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
187 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
188 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
189 int frame_complete_offset() const { return _frame_complete_offset; }
190
191 // CodeCache support: really only used by the nmethods, but in order to get
192 // asserts and certain bookkeeping to work in the CodeCache they are defined
193 // virtual here.
194 virtual bool is_zombie() const { return false; }
195 virtual bool is_locked_by_vm() const { return false; }
196
197 virtual bool is_unloaded() const { return false; }
198 virtual bool is_not_entrant() const { return false; }
199
200 // GC support
201 virtual bool is_alive() const = 0;
202
203 // OopMap for frame
204 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
205 void set_oop_maps(OopMapSet* p);
206 const ImmutableOopMap* oop_map_for_return_address(address return_address);
207 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) = 0;
208
209 // Frame support
210 int frame_size() const { return _frame_size; }
211 void set_frame_size(int size) { _frame_size = size; }
212
213 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
214 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
215
216 // Naming
217 const char* name() const { return _name; }
218 void set_name(const char* name) { _name = name; }
219
220 // Debugging
221 virtual void verify() = 0;
222 virtual void print() const { print_on(tty); };
223 virtual void print_on(outputStream* st) const;
224 virtual void print_value_on(outputStream* st) const;
225 void dump_for_addr(address addr, outputStream* st, bool verbose) const;
226 void print_code();
227
228 // Print the comment associated with offset on stream, if there is one
229 virtual void print_block_comment(outputStream* stream, address block_begin) const {
230 intptr_t offset = (intptr_t)(block_begin - code_begin());
231 _strings.print_block_comment(stream, offset);
232 }
233
234 // Transfer ownership of comments to this CodeBlob
235 void set_strings(CodeStrings& strings) {
236 assert(!is_aot(), "invalid on aot");
237 _strings.assign(strings);
238 }
239
240 static ByteSize name_field_offset() {
241 return byte_offset_of(CodeBlob, _name);
242 }
243
244 static ByteSize oop_maps_field_offset() {
245 return byte_offset_of(CodeBlob, _oop_maps);
246 }
247 };
248
249 class CodeBlobLayout : public StackObj {
250 private:
251 int _size;
252 int _header_size;
253 int _relocation_size;
254 int _content_offset;
255 int _code_offset;
256 int _data_offset;
257 address _code_begin;
258 address _code_end;
259 address _content_begin;
260 address _content_end;
261 address _data_end;
262 address _relocation_begin;
263 address _relocation_end;
264
265 public:
266 CodeBlobLayout(address code_begin, address code_end, address content_begin, address content_end, address data_end, address relocation_begin, address relocation_end) :
267 _size(0),
268 _header_size(0),
269 _relocation_size(0),
270 _content_offset(0),
271 _code_offset(0),
272 _data_offset(0),
273 _code_begin(code_begin),
274 _code_end(code_end),
275 _content_begin(content_begin),
276 _content_end(content_end),
277 _data_end(data_end),
278 _relocation_begin(relocation_begin),
279 _relocation_end(relocation_end)
280 {
281 }
282
283 CodeBlobLayout(const address start, int size, int header_size, int relocation_size, int data_offset) :
284 _size(size),
285 _header_size(header_size),
286 _relocation_size(relocation_size),
287 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
288 _code_offset(_content_offset),
289 _data_offset(data_offset)
290 {
291 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
292
293 _code_begin = (address) start + _code_offset;
294 _code_end = (address) start + _data_offset;
295
296 _content_begin = (address) start + _content_offset;
297 _content_end = (address) start + _data_offset;
298
299 _data_end = (address) start + _size;
300 _relocation_begin = (address) start + _header_size;
301 _relocation_end = _relocation_begin + _relocation_size;
302 }
303
304 CodeBlobLayout(const address start, int size, int header_size, const CodeBuffer* cb) :
305 _size(size),
306 _header_size(header_size),
307 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
308 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
309 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
310 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize))
311 {
312 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
313
314 _code_begin = (address) start + _code_offset;
315 _code_end = (address) start + _data_offset;
316
317 _content_begin = (address) start + _content_offset;
318 _content_end = (address) start + _data_offset;
319
320 _data_end = (address) start + _size;
321 _relocation_begin = (address) start + _header_size;
322 _relocation_end = _relocation_begin + _relocation_size;
323 }
324
325 int size() const { return _size; }
326 int header_size() const { return _header_size; }
327 int relocation_size() const { return _relocation_size; }
328 int content_offset() const { return _content_offset; }
329 int code_offset() const { return _code_offset; }
330 int data_offset() const { return _data_offset; }
331 address code_begin() const { return _code_begin; }
332 address code_end() const { return _code_end; }
333 address data_end() const { return _data_end; }
334 address relocation_begin() const { return _relocation_begin; }
335 address relocation_end() const { return _relocation_end; }
336 address content_begin() const { return _content_begin; }
337 address content_end() const { return _content_end; }
338 };
339
340
341 class RuntimeBlob : public CodeBlob {
342 friend class VMStructs;
343 public:
344
345 // Creation
346 // a) simple CodeBlob
347 // frame_complete is the offset from the beginning of the instructions
348 // to where the frame setup (from stackwalk viewpoint) is complete.
349 RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size);
350
351 // b) full CodeBlob
352 RuntimeBlob(
353 const char* name,
354 CodeBuffer* cb,
355 int header_size,
356 int size,
357 int frame_complete,
358 int frame_size,
359 OopMapSet* oop_maps,
360 bool caller_must_gc_arguments = false
361 );
362
363 // GC support
364 virtual bool is_alive() const = 0;
365
366 void verify();
367
368 // OopMap for frame
369 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); }
370
371 // Debugging
372 void print() const { print_on(tty); }
373 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); }
374 virtual void print_value_on(outputStream* st) const { CodeBlob::print_value_on(st); }
375
376 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
377 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
378 };
379
380 class WhiteBox;
381 //----------------------------------------------------------------------------------------------------
382 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
383
384 class BufferBlob: public RuntimeBlob {
385 friend class VMStructs;
386 friend class AdapterBlob;
387 friend class VtableBlob;
388 friend class MethodHandlesAdapterBlob;
389 friend class WhiteBox;
390
391 private:
392 // Creation support
393 BufferBlob(const char* name, int size);
394 BufferBlob(const char* name, int size, CodeBuffer* cb);
395
396 // This ordinary operator delete is needed even though not used, so the
397 // below two-argument operator delete will be treated as a placement
398 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
399 void operator delete(void* p);
400 void* operator new(size_t s, unsigned size) throw();
401
402 public:
403 // Creation
404 static BufferBlob* create(const char* name, int buffer_size);
405 static BufferBlob* create(const char* name, CodeBuffer* cb);
406
407 static void free(BufferBlob* buf);
408
409 // Typing
410 virtual bool is_buffer_blob() const { return true; }
411
412 // GC/Verification support
413 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
414 bool is_alive() const { return true; }
415
416 void verify();
417 void print_on(outputStream* st) const;
418 void print_value_on(outputStream* st) const;
419 };
420
421
422 //----------------------------------------------------------------------------------------------------
423 // AdapterBlob: used to hold C2I/I2C adapters
424
425 class AdapterBlob: public BufferBlob {
426 private:
427 AdapterBlob(int size, CodeBuffer* cb);
428
429 public:
430 // Creation
431 static AdapterBlob* create(CodeBuffer* cb);
432
433 // Typing
434 virtual bool is_adapter_blob() const { return true; }
435 };
436
437 //---------------------------------------------------------------------------------------------------
438 class VtableBlob: public BufferBlob {
439 private:
440 VtableBlob(const char*, int);
441
442 public:
443 // Creation
444 static VtableBlob* create(const char* name, int buffer_size);
445
446 // Typing
447 virtual bool is_vtable_blob() const { return true; }
448 };
449
450 //----------------------------------------------------------------------------------------------------
451 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
452
453 class MethodHandlesAdapterBlob: public BufferBlob {
454 private:
455 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {}
456
457 public:
458 // Creation
459 static MethodHandlesAdapterBlob* create(int buffer_size);
460
461 // Typing
462 virtual bool is_method_handles_adapter_blob() const { return true; }
463 };
464
465
466 //----------------------------------------------------------------------------------------------------
467 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
468
469 class RuntimeStub: public RuntimeBlob {
470 friend class VMStructs;
471 private:
472 // Creation support
473 RuntimeStub(
474 const char* name,
475 CodeBuffer* cb,
476 int size,
477 int frame_complete,
478 int frame_size,
479 OopMapSet* oop_maps,
480 bool caller_must_gc_arguments
481 );
482
483 // This ordinary operator delete is needed even though not used, so the
484 // below two-argument operator delete will be treated as a placement
485 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
486 void operator delete(void* p);
487 void* operator new(size_t s, unsigned size) throw();
488
489 public:
490 // Creation
491 static RuntimeStub* new_runtime_stub(
492 const char* stub_name,
493 CodeBuffer* cb,
494 int frame_complete,
495 int frame_size,
496 OopMapSet* oop_maps,
497 bool caller_must_gc_arguments
498 );
499
500 // Typing
501 bool is_runtime_stub() const { return true; }
502
503 address entry_point() const { return code_begin(); }
504
505 // GC/Verification support
506 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
507 bool is_alive() const { return true; }
508
509 void verify();
510 void print_on(outputStream* st) const;
511 void print_value_on(outputStream* st) const;
512 };
513
514
515 //----------------------------------------------------------------------------------------------------
516 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
517
518 class SingletonBlob: public RuntimeBlob {
519 friend class VMStructs;
520
521 protected:
522 // This ordinary operator delete is needed even though not used, so the
523 // below two-argument operator delete will be treated as a placement
524 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
525 void operator delete(void* p);
526 void* operator new(size_t s, unsigned size) throw();
527
528 public:
529 SingletonBlob(
530 const char* name,
531 CodeBuffer* cb,
532 int header_size,
533 int size,
534 int frame_size,
535 OopMapSet* oop_maps
536 )
537 : RuntimeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
538 {};
539
540 address entry_point() { return code_begin(); }
541
542 bool is_alive() const { return true; }
543
544 // GC/Verification support
545 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
546 void verify(); // does nothing
547 void print_on(outputStream* st) const;
548 void print_value_on(outputStream* st) const;
549 };
550
551
552 //----------------------------------------------------------------------------------------------------
553 // DeoptimizationBlob
554
555 class DeoptimizationBlob: public SingletonBlob {
556 friend class VMStructs;
557 friend class JVMCIVMStructs;
558 private:
559 int _unpack_offset;
560 int _unpack_with_exception;
561 int _unpack_with_reexecution;
562
563 int _unpack_with_exception_in_tls;
564
565 #if INCLUDE_JVMCI
566 // Offsets when JVMCI calls uncommon_trap.
567 int _uncommon_trap_offset;
568 int _implicit_exception_uncommon_trap_offset;
569 #endif
570
571 // Creation support
572 DeoptimizationBlob(
573 CodeBuffer* cb,
574 int size,
575 OopMapSet* oop_maps,
576 int unpack_offset,
577 int unpack_with_exception_offset,
578 int unpack_with_reexecution_offset,
579 int frame_size
580 );
581
582 public:
583 // Creation
584 static DeoptimizationBlob* create(
585 CodeBuffer* cb,
586 OopMapSet* oop_maps,
587 int unpack_offset,
588 int unpack_with_exception_offset,
589 int unpack_with_reexecution_offset,
590 int frame_size
591 );
592
593 // Typing
594 bool is_deoptimization_stub() const { return true; }
595 bool exception_address_is_unpack_entry(address pc) const {
596 address unpack_pc = unpack();
597 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);
598 }
599
600 // GC for args
601 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
602
603 // Printing
604 void print_value_on(outputStream* st) const;
605
606 address unpack() const { return code_begin() + _unpack_offset; }
607 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
608 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
609
610 // Alternate entry point for C1 where the exception and issuing pc
611 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
612 // instead of being in registers. This is needed because C1 doesn't
613 // model exception paths in a way that keeps these registers free so
614 // there may be live values in those registers during deopt.
615 void set_unpack_with_exception_in_tls_offset(int offset) {
616 _unpack_with_exception_in_tls = offset;
617 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
618 }
619 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
620
621 #if INCLUDE_JVMCI
622 // Offsets when JVMCI calls uncommon_trap.
623 void set_uncommon_trap_offset(int offset) {
624 _uncommon_trap_offset = offset;
625 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
626 }
627 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
628
629 void set_implicit_exception_uncommon_trap_offset(int offset) {
630 _implicit_exception_uncommon_trap_offset = offset;
631 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
632 }
633 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
634 #endif // INCLUDE_JVMCI
635 };
636
637
638 //----------------------------------------------------------------------------------------------------
639 // UncommonTrapBlob (currently only used by Compiler 2)
640
641 #ifdef COMPILER2
642
643 class UncommonTrapBlob: public SingletonBlob {
644 friend class VMStructs;
645 private:
646 // Creation support
647 UncommonTrapBlob(
648 CodeBuffer* cb,
649 int size,
650 OopMapSet* oop_maps,
651 int frame_size
652 );
653
654 public:
655 // Creation
656 static UncommonTrapBlob* create(
657 CodeBuffer* cb,
658 OopMapSet* oop_maps,
659 int frame_size
660 );
661
662 // GC for args
663 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
664
665 // Typing
666 bool is_uncommon_trap_stub() const { return true; }
667 };
668
669
670 //----------------------------------------------------------------------------------------------------
671 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
672
673 class ExceptionBlob: public SingletonBlob {
674 friend class VMStructs;
675 private:
676 // Creation support
677 ExceptionBlob(
678 CodeBuffer* cb,
679 int size,
680 OopMapSet* oop_maps,
681 int frame_size
682 );
683
684 public:
685 // Creation
686 static ExceptionBlob* create(
687 CodeBuffer* cb,
688 OopMapSet* oop_maps,
689 int frame_size
690 );
691
692 // GC for args
693 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
694
695 // Typing
696 bool is_exception_stub() const { return true; }
697 };
698 #endif // COMPILER2
699
700
701 //----------------------------------------------------------------------------------------------------
702 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
703
704 class SafepointBlob: public SingletonBlob {
705 friend class VMStructs;
706 private:
707 // Creation support
708 SafepointBlob(
709 CodeBuffer* cb,
710 int size,
711 OopMapSet* oop_maps,
712 int frame_size
713 );
714
715 public:
716 // Creation
717 static SafepointBlob* create(
718 CodeBuffer* cb,
719 OopMapSet* oop_maps,
720 int frame_size
721 );
722
723 // GC for args
724 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
725
726 // Typing
727 bool is_safepoint_stub() const { return true; }
728 };
729
730 #endif // SHARE_VM_CODE_CODEBLOB_HPP