1 /*
2 * Copyright (c) 1998, 2025, 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_CODE_CODEBLOB_HPP
26 #define SHARE_CODE_CODEBLOB_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "compiler/compilerDefinitions.hpp"
30 #include "compiler/oopMap.hpp"
31 #include "runtime/javaFrameAnchor.hpp"
32 #include "runtime/frame.hpp"
33 #include "runtime/handles.hpp"
34 #include "utilities/align.hpp"
35 #include "utilities/macros.hpp"
36
37 class ImmutableOopMap;
38 class ImmutableOopMapSet;
39 class JNIHandleBlock;
40 class OopMapSet;
41
42 // CodeBlob Types
43 // Used in the CodeCache to assign CodeBlobs to different CodeHeaps
44 enum class CodeBlobType {
45 MethodNonProfiled = 0, // Execution level 1 and 4 (non-profiled) nmethods (including native nmethods)
46 MethodProfiled = 1, // Execution level 2 and 3 (profiled) nmethods
47 NonNMethod = 2, // Non-nmethods like Buffers, Adapters and Runtime Stubs
48 All = 3, // All types (No code cache segmentation)
49 NumTypes = 4 // Number of CodeBlobTypes
50 };
51
52 // CodeBlob - superclass for all entries in the CodeCache.
53 //
54 // Subtypes are:
55 // nmethod : JIT Compiled Java methods
56 // RuntimeBlob : Non-compiled method code; generated glue code
57 // BufferBlob : Used for non-relocatable code such as interpreter, stubroutines, etc.
58 // AdapterBlob : Used to hold C2I/I2C adapters
59 // VtableBlob : Used for holding vtable chunks
60 // MethodHandlesAdapterBlob : Used to hold MethodHandles adapters
61 // RuntimeStub : Call to VM runtime methods
62 // SingletonBlob : Super-class for all blobs that exist in only one instance
63 // DeoptimizationBlob : Used for deoptimization
64 // SafepointBlob : Used to handle illegal instruction exceptions
65 // ExceptionBlob : Used for stack unrolling
66 // UncommonTrapBlob : Used to handle uncommon traps
67 // UpcallStub : Used for upcalls from native code
68 //
69 //
70 // Layout in the CodeCache:
71 // - header
72 // - content space
73 // - instruction space
74 // Outside of the CodeCache:
75 // - mutable_data
76 // - relocation info
77 // - additional data for subclasses
78
79 enum class CodeBlobKind : u1 {
80 None,
81 Nmethod,
82 Buffer,
83 Adapter,
84 Vtable,
85 MHAdapter,
86 RuntimeStub,
87 Deoptimization,
88 Safepoint,
89 #ifdef COMPILER2
90 Exception,
91 UncommonTrap,
92 #endif
93 Upcall,
94 Number_Of_Kinds
95 };
96
97 class UpcallStub; // for as_upcall_stub()
98 class RuntimeStub; // for as_runtime_stub()
99 class JavaFrameAnchor; // for UpcallStub::jfa_for_frame
100 class AdapterBlob;
101 class ExceptionBlob;
102
103 class CodeBlob {
104 friend class VMStructs;
105 friend class JVMCIVMStructs;
106
107 private:
108 void restore_mutable_data(address reloc_data);
109
110 protected:
111 // order fields from large to small to minimize padding between fields
112 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob
113 const char* _name;
114 address _mutable_data;
115
116 int _size; // total size of CodeBlob in bytes
117 int _relocation_size; // size of relocation (could be bigger than 64Kb)
118 int _content_offset; // offset to where content region begins (this includes consts, insts, stubs)
119 int _code_offset; // offset to where instructions region begins (this includes insts, stubs)
120 int _data_offset; // offset to where data region begins
121 int _frame_size; // size of stack frame in words (NOT slots. On x64 these are 64bit words)
122 int _mutable_data_size;
123
124 S390_ONLY(int _ctable_offset;)
125
126 uint16_t _header_size; // size of header (depends on subclass)
127 int16_t _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have
128 // not finished setting up their frame. Beware of pc's in
129 // that range. There is a similar range(s) on returns
130 // which we don't detect.
131
132 CodeBlobKind _kind; // Kind of this code blob
133
134 bool _caller_must_gc_arguments;
135
136 #ifndef PRODUCT
137 AsmRemarks _asm_remarks;
138 DbgStrings _dbg_strings;
139 #endif
140
141 void print_on_impl(outputStream* st) const;
142 void print_value_on_impl(outputStream* st) const;
143
144 class Vptr {
145 public:
146 virtual void print_on(const CodeBlob* instance, outputStream* st) const = 0;
147 virtual void print_value_on(const CodeBlob* instance, outputStream* st) const = 0;
148 virtual void prepare_for_archiving(CodeBlob* instance) const {
149 instance->prepare_for_archiving_impl();
150 };
151 virtual void post_restore(CodeBlob* instance) const {
152 instance->post_restore_impl();
153 };
154 };
155
156 static const Vptr* vptr(CodeBlobKind kind);
157 const Vptr* vptr() const;
158
159 CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
160 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments,
161 int mutable_data_size);
162
163 // Simple CodeBlob used for simple BufferBlob.
164 CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size);
165
166
167 void operator delete(void* p) { }
168
169 void prepare_for_archiving_impl();
170 void post_restore_impl();
171
172 public:
173
174 ~CodeBlob() {
175 assert(_oop_maps == nullptr, "Not flushed");
176 }
177
178 // Returns the space needed for CodeBlob
179 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
180 static unsigned int align_code_offset(int offset);
181
182 // Deletion
183 void purge();
184
185 // Typing
186 bool is_nmethod() const { return _kind == CodeBlobKind::Nmethod; }
187 bool is_buffer_blob() const { return _kind == CodeBlobKind::Buffer; }
188 bool is_runtime_stub() const { return _kind == CodeBlobKind::RuntimeStub; }
189 bool is_deoptimization_stub() const { return _kind == CodeBlobKind::Deoptimization; }
190 #ifdef COMPILER2
191 bool is_uncommon_trap_stub() const { return _kind == CodeBlobKind::UncommonTrap; }
192 bool is_exception_stub() const { return _kind == CodeBlobKind::Exception; }
193 #else
194 bool is_uncommon_trap_stub() const { return false; }
195 bool is_exception_stub() const { return false; }
196 #endif
197 bool is_safepoint_stub() const { return _kind == CodeBlobKind::Safepoint; }
198 bool is_adapter_blob() const { return _kind == CodeBlobKind::Adapter; }
199 bool is_vtable_blob() const { return _kind == CodeBlobKind::Vtable; }
200 bool is_method_handles_adapter_blob() const { return _kind == CodeBlobKind::MHAdapter; }
201 bool is_upcall_stub() const { return _kind == CodeBlobKind::Upcall; }
202
203 // Casting
204 nmethod* as_nmethod_or_null() const { return is_nmethod() ? (nmethod*) this : nullptr; }
205 nmethod* as_nmethod() const { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
206 CodeBlob* as_codeblob() const { return (CodeBlob*) this; }
207 AdapterBlob* as_adapter_blob() const { assert(is_adapter_blob(), "must be adapter blob"); return (AdapterBlob*) this; }
208 UpcallStub* as_upcall_stub() const { assert(is_upcall_stub(), "must be upcall stub"); return (UpcallStub*) this; }
209 RuntimeStub* as_runtime_stub() const { assert(is_runtime_stub(), "must be runtime blob"); return (RuntimeStub*) this; }
210
211 // Boundaries
212 address header_begin() const { return (address) this; }
213 address header_end() const { return ((address) this) + _header_size; }
214 address content_begin() const { return (address) header_begin() + _content_offset; }
215 address content_end() const { return (address) header_begin() + _data_offset; }
216 address code_begin() const { return (address) header_begin() + _code_offset; }
217 address code_end() const { return (address) header_begin() + _data_offset; }
218 address data_begin() const { return (address) header_begin() + _data_offset; }
219 address data_end() const { return (address) header_begin() + _size; }
220 address blob_end() const { return (address) header_begin() + _size; }
221 // code_end == content_end is true for all types of blobs for now, it is also checked in the constructor
222
223 int mutable_data_size() const { return _mutable_data_size; }
224 address mutable_data_begin() const { return _mutable_data; }
225 address mutable_data_end() const { return _mutable_data + _mutable_data_size; }
226
227 relocInfo* relocation_begin() const { return (relocInfo*)_mutable_data; }
228 relocInfo* relocation_end() const { return (relocInfo*)((address)relocation_begin() + _relocation_size); }
229
230 // Offsets
231 int content_offset() const { return _content_offset; }
232 int code_offset() const { return _code_offset; }
233
234 // This field holds the beginning of the const section in the old code buffer.
235 // It is needed to fix relocations of pc-relative loads when resizing the
236 // the constant pool or moving it.
237 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
238 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
239
240 // Sizes
241 int size() const { return _size; }
242 int header_size() const { return _header_size; }
243 int relocation_size() const { return pointer_delta_as_int((address) relocation_end(), (address) relocation_begin()); }
244 int content_size() const { return pointer_delta_as_int(content_end(), content_begin()); }
245 int code_size() const { return pointer_delta_as_int(code_end(), code_begin()); }
246
247 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed
248 void adjust_size(size_t used) {
249 _size = (int)used;
250 _data_offset = _size;
251 }
252
253 // Containment
254 bool blob_contains(address addr) const { return header_begin() <= addr && addr < blob_end(); }
255 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
256 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
257 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
258 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
259 int frame_complete_offset() const { return _frame_complete_offset; }
260
261 // OopMap for frame
262 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
263 void set_oop_maps(OopMapSet* p);
264 void set_oop_maps(ImmutableOopMapSet* p) { _oop_maps = p; }
265
266 const ImmutableOopMap* oop_map_for_slot(int slot, address return_address) const;
267 const ImmutableOopMap* oop_map_for_return_address(address return_address) const;
268
269 // Frame support. Sizes are in word units.
270 int frame_size() const { return _frame_size; }
271 void set_frame_size(int size) { _frame_size = size; }
272
273 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
274 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
275
276 // Naming
277 const char* name() const { return _name; }
278 void set_name(const char* name) { _name = name; }
279
280 // Debugging
281 void verify();
282 void print() const;
283 void print_on(outputStream* st) const;
284 void print_value_on(outputStream* st) const;
285
286 void dump_for_addr(address addr, outputStream* st, bool verbose) const;
287 void print_code_on(outputStream* st);
288
289 // Print to stream, any comments associated with offset.
290 void print_block_comment(outputStream* stream, address block_begin) const;
291
292 #ifndef PRODUCT
293 AsmRemarks &asm_remarks() { return _asm_remarks; }
294 DbgStrings &dbg_strings() { return _dbg_strings; }
295
296 void use_remarks(AsmRemarks &remarks) { _asm_remarks.share(remarks); }
297 void use_strings(DbgStrings &strings) { _dbg_strings.share(strings); }
298 #endif
299
300 void copy_to(address buffer) {
301 memcpy(buffer, this, this->size());
302 }
303
304 // methods to archive a blob into AOT code cache
305 void prepare_for_archiving();
306 static void archive_blob(CodeBlob* blob, address archive_buffer);
307
308 // methods to restore a blob from AOT code cache into the CodeCache
309 void post_restore();
310 CodeBlob* restore(address code_cache_buffer, const char* name, address archived_reloc_data, ImmutableOopMapSet* archived_oop_maps);
311 static CodeBlob* create(CodeBlob* archived_blob, const char* name, address archived_reloc_data, ImmutableOopMapSet* archived_oop_maps);
312 };
313
314 //----------------------------------------------------------------------------------------------------
315 // RuntimeBlob: used for non-compiled method code (adapters, stubs, blobs)
316
317 class RuntimeBlob : public CodeBlob {
318 friend class VMStructs;
319 public:
320
321 // Creation
322 // a) simple CodeBlob
323 RuntimeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size)
324 : CodeBlob(name, kind, size, header_size)
325 {}
326
327 // b) full CodeBlob
328 // frame_complete is the offset from the beginning of the instructions
329 // to where the frame setup (from stackwalk viewpoint) is complete.
330 RuntimeBlob(
331 const char* name,
332 CodeBlobKind kind,
333 CodeBuffer* cb,
334 int size,
335 uint16_t header_size,
336 int16_t frame_complete,
337 int frame_size,
338 OopMapSet* oop_maps,
339 bool caller_must_gc_arguments = false
340 );
341
342 static void free(RuntimeBlob* blob);
343
344 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
345 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
346
347 class Vptr : public CodeBlob::Vptr {
348 };
349 };
350
351 class WhiteBox;
352 //----------------------------------------------------------------------------------------------------
353 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
354
355 class BufferBlob: public RuntimeBlob {
356 friend class VMStructs;
357 friend class AdapterBlob;
358 friend class VtableBlob;
359 friend class MethodHandlesAdapterBlob;
360 friend class UpcallStub;
361 friend class WhiteBox;
362
363 private:
364 // Creation support
365 BufferBlob(const char* name, CodeBlobKind kind, int size);
366 BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size);
367
368 void* operator new(size_t s, unsigned size) throw();
369
370 public:
371 // Creation
372 static BufferBlob* create(const char* name, uint buffer_size);
373 static BufferBlob* create(const char* name, CodeBuffer* cb);
374
375 static void free(BufferBlob* buf);
376
377 void print_on_impl(outputStream* st) const;
378 void print_value_on_impl(outputStream* st) const;
379
380 class Vptr : public RuntimeBlob::Vptr {
381 void print_on(const CodeBlob* instance, outputStream* st) const override {
382 ((const BufferBlob*)instance)->print_on_impl(st);
383 }
384 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
385 ((const BufferBlob*)instance)->print_value_on_impl(st);
386 }
387 };
388
389 static const Vptr _vpntr;
390 };
391
392
393 //----------------------------------------------------------------------------------------------------
394 // AdapterBlob: used to hold C2I/I2C adapters
395
396 class AdapterBlob: public BufferBlob {
397 private:
398 AdapterBlob(int size, CodeBuffer* cb);
399
400 public:
401 // Creation
402 static AdapterBlob* create(CodeBuffer* cb);
403 };
404
405 //---------------------------------------------------------------------------------------------------
406 class VtableBlob: public BufferBlob {
407 private:
408 VtableBlob(const char*, int);
409
410 void* operator new(size_t s, unsigned size) throw();
411
412 public:
413 // Creation
414 static VtableBlob* create(const char* name, int buffer_size);
415 };
416
417 //----------------------------------------------------------------------------------------------------
418 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
419
420 class MethodHandlesAdapterBlob: public BufferBlob {
421 private:
422 MethodHandlesAdapterBlob(int size): BufferBlob("MethodHandles adapters", CodeBlobKind::MHAdapter, size) {}
423
424 public:
425 // Creation
426 static MethodHandlesAdapterBlob* create(int buffer_size);
427 };
428
429
430 //----------------------------------------------------------------------------------------------------
431 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
432
433 class RuntimeStub: public RuntimeBlob {
434 friend class VMStructs;
435 private:
436 // Creation support
437 RuntimeStub(
438 const char* name,
439 CodeBuffer* cb,
440 int size,
441 int16_t frame_complete,
442 int frame_size,
443 OopMapSet* oop_maps,
444 bool caller_must_gc_arguments
445 );
446
447 void* operator new(size_t s, unsigned size) throw();
448
449 public:
450 // Creation
451 static RuntimeStub* new_runtime_stub(
452 const char* stub_name,
453 CodeBuffer* cb,
454 int16_t frame_complete,
455 int frame_size,
456 OopMapSet* oop_maps,
457 bool caller_must_gc_arguments,
458 bool alloc_fail_is_fatal=true
459 );
460
461 static void free(RuntimeStub* stub) { RuntimeBlob::free(stub); }
462
463 address entry_point() const { return code_begin(); }
464
465 void print_on_impl(outputStream* st) const;
466 void print_value_on_impl(outputStream* st) const;
467
468 class Vptr : public RuntimeBlob::Vptr {
469 void print_on(const CodeBlob* instance, outputStream* st) const override {
470 instance->as_runtime_stub()->print_on_impl(st);
471 }
472 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
473 instance->as_runtime_stub()->print_value_on_impl(st);
474 }
475 };
476
477 static const Vptr _vpntr;
478 };
479
480
481 //----------------------------------------------------------------------------------------------------
482 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
483
484 class SingletonBlob: public RuntimeBlob {
485 friend class VMStructs;
486
487 protected:
488 void* operator new(size_t s, unsigned size, bool alloc_fail_is_fatal=true) throw();
489
490 public:
491 SingletonBlob(
492 const char* name,
493 CodeBlobKind kind,
494 CodeBuffer* cb,
495 int size,
496 uint16_t header_size,
497 int frame_size,
498 OopMapSet* oop_maps
499 )
500 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
501 {};
502
503 address entry_point() { return code_begin(); }
504
505 void print_on_impl(outputStream* st) const;
506 void print_value_on_impl(outputStream* st) const;
507
508 class Vptr : public RuntimeBlob::Vptr {
509 void print_on(const CodeBlob* instance, outputStream* st) const override {
510 ((const SingletonBlob*)instance)->print_on_impl(st);
511 }
512 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
513 ((const SingletonBlob*)instance)->print_value_on_impl(st);
514 }
515 };
516
517 static const Vptr _vpntr;
518 };
519
520
521 //----------------------------------------------------------------------------------------------------
522 // DeoptimizationBlob
523
524 class DeoptimizationBlob: public SingletonBlob {
525 friend class VMStructs;
526 friend class JVMCIVMStructs;
527 private:
528 int _unpack_offset;
529 int _unpack_with_exception;
530 int _unpack_with_reexecution;
531
532 int _unpack_with_exception_in_tls;
533
534 #if INCLUDE_JVMCI
535 // Offsets when JVMCI calls uncommon_trap.
536 int _uncommon_trap_offset;
537 int _implicit_exception_uncommon_trap_offset;
538 #endif
539
540 // Creation support
541 DeoptimizationBlob(
542 CodeBuffer* cb,
543 int size,
544 OopMapSet* oop_maps,
545 int unpack_offset,
546 int unpack_with_exception_offset,
547 int unpack_with_reexecution_offset,
548 int frame_size
549 );
550
551 public:
552 // Creation
553 static DeoptimizationBlob* create(
554 CodeBuffer* cb,
555 OopMapSet* oop_maps,
556 int unpack_offset,
557 int unpack_with_exception_offset,
558 int unpack_with_reexecution_offset,
559 int frame_size
560 );
561
562 address unpack() const { return code_begin() + _unpack_offset; }
563 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
564 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
565
566 // Alternate entry point for C1 where the exception and issuing pc
567 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
568 // instead of being in registers. This is needed because C1 doesn't
569 // model exception paths in a way that keeps these registers free so
570 // there may be live values in those registers during deopt.
571 void set_unpack_with_exception_in_tls_offset(int offset) {
572 _unpack_with_exception_in_tls = offset;
573 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
574 }
575 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
576
577 #if INCLUDE_JVMCI
578 // Offsets when JVMCI calls uncommon_trap.
579 void set_uncommon_trap_offset(int offset) {
580 _uncommon_trap_offset = offset;
581 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
582 }
583 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
584
585 void set_implicit_exception_uncommon_trap_offset(int offset) {
586 _implicit_exception_uncommon_trap_offset = offset;
587 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
588 }
589 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
590 #endif // INCLUDE_JVMCI
591
592 void print_value_on_impl(outputStream* st) const;
593
594 class Vptr : public SingletonBlob::Vptr {
595 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
596 ((const DeoptimizationBlob*)instance)->print_value_on_impl(st);
597 }
598 };
599
600 static const Vptr _vpntr;
601 };
602
603
604 //----------------------------------------------------------------------------------------------------
605 // UncommonTrapBlob (currently only used by Compiler 2)
606
607 #ifdef COMPILER2
608
609 class UncommonTrapBlob: public SingletonBlob {
610 friend class VMStructs;
611 private:
612 // Creation support
613 UncommonTrapBlob(
614 CodeBuffer* cb,
615 int size,
616 OopMapSet* oop_maps,
617 int frame_size
618 );
619
620 public:
621 // Creation
622 static UncommonTrapBlob* create(
623 CodeBuffer* cb,
624 OopMapSet* oop_maps,
625 int frame_size
626 );
627 };
628
629
630 //----------------------------------------------------------------------------------------------------
631 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
632
633 class ExceptionBlob: public SingletonBlob {
634 friend class VMStructs;
635 private:
636 // Creation support
637 ExceptionBlob(
638 CodeBuffer* cb,
639 int size,
640 OopMapSet* oop_maps,
641 int frame_size
642 );
643
644 public:
645 // Creation
646 static ExceptionBlob* create(
647 CodeBuffer* cb,
648 OopMapSet* oop_maps,
649 int frame_size
650 );
651
652 void post_restore_impl() {
653 trace_new_stub(this, "ExceptionBlob");
654 }
655
656 class Vptr : public SingletonBlob::Vptr {
657 void post_restore(CodeBlob* instance) const override {
658 ((ExceptionBlob*)instance)->post_restore_impl();
659 }
660 };
661
662 static const Vptr _vpntr;
663 };
664 #endif // COMPILER2
665
666
667 //----------------------------------------------------------------------------------------------------
668 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
669
670 class SafepointBlob: public SingletonBlob {
671 friend class VMStructs;
672 private:
673 // Creation support
674 SafepointBlob(
675 CodeBuffer* cb,
676 int size,
677 OopMapSet* oop_maps,
678 int frame_size
679 );
680
681 public:
682 // Creation
683 static SafepointBlob* create(
684 CodeBuffer* cb,
685 OopMapSet* oop_maps,
686 int frame_size
687 );
688 };
689
690 //----------------------------------------------------------------------------------------------------
691
692 class UpcallLinker;
693
694 // A (Panama) upcall stub. Not used by JNI.
695 class UpcallStub: public RuntimeBlob {
696 friend class VMStructs;
697 friend class UpcallLinker;
698 private:
699 jobject _receiver;
700 ByteSize _frame_data_offset;
701
702 UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset);
703
704 void* operator new(size_t s, unsigned size) throw();
705
706 struct FrameData {
707 JavaFrameAnchor jfa;
708 JavaThread* thread;
709 JNIHandleBlock* old_handles;
710 JNIHandleBlock* new_handles;
711 };
712
713 // defined in frame_ARCH.cpp
714 FrameData* frame_data_for_frame(const frame& frame) const;
715 public:
716 // Creation
717 static UpcallStub* create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset);
718
719 static void free(UpcallStub* blob);
720
721 jobject receiver() { return _receiver; }
722
723 JavaFrameAnchor* jfa_for_frame(const frame& frame) const;
724
725 // GC support
726 void oops_do(OopClosure* f, const frame& frame);
727
728 void print_on_impl(outputStream* st) const;
729 void print_value_on_impl(outputStream* st) const;
730
731 class Vptr : public RuntimeBlob::Vptr {
732 void print_on(const CodeBlob* instance, outputStream* st) const override {
733 instance->as_upcall_stub()->print_on_impl(st);
734 }
735 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
736 instance->as_upcall_stub()->print_value_on_impl(st);
737 }
738 };
739
740 static const Vptr _vpntr;
741 };
742
743 #endif // SHARE_CODE_CODEBLOB_HPP