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/frame.hpp"
32 #include "runtime/handles.hpp"
33 #include "runtime/javaFrameAnchor.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 class DeoptimizationBlob;
103 class SafepointBlob;
104 class UncommonTrapBlob;
105
106 class CodeBlob {
107 friend class VMStructs;
108 friend class JVMCIVMStructs;
109
110 private:
111 void restore_mutable_data(address reloc_data);
112
113 protected:
114 // order fields from large to small to minimize padding between fields
115 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob
116 const char* _name;
117 address _mutable_data;
118
119 int _size; // total size of CodeBlob in bytes
120 int _relocation_size; // size of relocation (could be bigger than 64Kb)
121 int _content_offset; // offset to where content region begins (this includes consts, insts, stubs)
122 int _code_offset; // offset to where instructions region begins (this includes insts, stubs)
123 int _data_offset; // offset to where data region begins
124 int _frame_size; // size of stack frame in words (NOT slots. On x64 these are 64bit words)
125 int _mutable_data_size;
126
127 S390_ONLY(int _ctable_offset;)
128
129 uint16_t _header_size; // size of header (depends on subclass)
130 int16_t _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have
131 // not finished setting up their frame. Beware of pc's in
132 // that range. There is a similar range(s) on returns
133 // which we don't detect.
134
135 CodeBlobKind _kind; // Kind of this code blob
136
137 bool _caller_must_gc_arguments;
138
139 #ifndef PRODUCT
140 AsmRemarks _asm_remarks;
141 DbgStrings _dbg_strings;
142 #endif
143
144 void print_on_impl(outputStream* st) const;
145 void print_value_on_impl(outputStream* st) const;
146
147 class Vptr {
148 public:
149 virtual void print_on(const CodeBlob* instance, outputStream* st) const = 0;
150 virtual void print_value_on(const CodeBlob* instance, outputStream* st) const = 0;
151 virtual void prepare_for_archiving(CodeBlob* instance) const {
152 instance->prepare_for_archiving_impl();
153 };
154 virtual void post_restore(CodeBlob* instance) const {
155 instance->post_restore_impl();
156 };
157 };
158
159 static const Vptr* vptr(CodeBlobKind kind);
160 const Vptr* vptr() const;
161
162 CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
163 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments,
164 int mutable_data_size);
165
166 // Simple CodeBlob used for simple BufferBlob.
167 CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size);
168
169
170 void operator delete(void* p) { }
171
172 void prepare_for_archiving_impl();
173 void post_restore_impl();
174
175 public:
176
177 ~CodeBlob() NOT_DEBUG_RETURN;
178
179 // Returns the space needed for CodeBlob
180 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
181 static unsigned int align_code_offset(int offset);
182
183 // Deletion
184 void purge();
185
186 // Typing
187 bool is_nmethod() const { return _kind == CodeBlobKind::Nmethod; }
188 bool is_buffer_blob() const { return _kind == CodeBlobKind::Buffer; }
189 bool is_runtime_stub() const { return _kind == CodeBlobKind::RuntimeStub; }
190 bool is_deoptimization_stub() const { return _kind == CodeBlobKind::Deoptimization; }
191 #ifdef COMPILER2
192 bool is_uncommon_trap_stub() const { return _kind == CodeBlobKind::UncommonTrap; }
193 bool is_exception_stub() const { return _kind == CodeBlobKind::Exception; }
194 #else
195 bool is_uncommon_trap_stub() const { return false; }
196 bool is_exception_stub() const { return false; }
197 #endif
198 bool is_safepoint_stub() const { return _kind == CodeBlobKind::Safepoint; }
199 bool is_adapter_blob() const { return _kind == CodeBlobKind::Adapter; }
200 bool is_vtable_blob() const { return _kind == CodeBlobKind::Vtable; }
201 bool is_method_handles_adapter_blob() const { return _kind == CodeBlobKind::MHAdapter; }
202 bool is_upcall_stub() const { return _kind == CodeBlobKind::Upcall; }
203
204 // Casting
205 nmethod* as_nmethod_or_null() const { return is_nmethod() ? (nmethod*) this : nullptr; }
206 nmethod* as_nmethod() const { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
207 CodeBlob* as_codeblob() const { return (CodeBlob*) this; }
208 AdapterBlob* as_adapter_blob() const { assert(is_adapter_blob(), "must be adapter blob"); return (AdapterBlob*) this; }
209 ExceptionBlob* as_exception_blob() const { assert(is_exception_stub(), "must be exception stub"); return (ExceptionBlob*) this; }
210 DeoptimizationBlob* as_deoptimization_blob() const { assert(is_deoptimization_stub(), "must be deopt stub"); return (DeoptimizationBlob*) this; }
211 SafepointBlob* as_safepoint_blob() const { assert(is_safepoint_stub(), "must be safepoint stub"); return (SafepointBlob*) this; }
212 UpcallStub* as_upcall_stub() const { assert(is_upcall_stub(), "must be upcall stub"); return (UpcallStub*) this; }
213 RuntimeStub* as_runtime_stub() const { assert(is_runtime_stub(), "must be runtime blob"); return (RuntimeStub*) this; }
214 UncommonTrapBlob* as_uncommon_trap_blob() const { assert(is_uncommon_trap_stub(), "must be uncommon trap stub"); return (UncommonTrapBlob*) this; }
215
216 // Boundaries
217 address header_begin() const { return (address) this; }
218 address header_end() const { return ((address) this) + _header_size; }
219 address content_begin() const { return (address) header_begin() + _content_offset; }
220 address content_end() const { return (address) header_begin() + _data_offset; }
221 address code_begin() const { return (address) header_begin() + _code_offset; }
222 address code_end() const { return (address) header_begin() + _data_offset; }
223 address data_begin() const { return (address) header_begin() + _data_offset; }
224 address data_end() const { return (address) header_begin() + _size; }
225 address blob_end() const { return (address) header_begin() + _size; }
226 // code_end == content_end is true for all types of blobs for now, it is also checked in the constructor
227
228 int mutable_data_size() const { return _mutable_data_size; }
229 address mutable_data_begin() const { return _mutable_data; }
230 address mutable_data_end() const { return _mutable_data + _mutable_data_size; }
231
232 relocInfo* relocation_begin() const { return (relocInfo*)_mutable_data; }
233 relocInfo* relocation_end() const { return (relocInfo*)((address)relocation_begin() + _relocation_size); }
234
235 // Offsets
236 int content_offset() const { return _content_offset; }
237 int code_offset() const { return _code_offset; }
238
239 // This field holds the beginning of the const section in the old code buffer.
240 // It is needed to fix relocations of pc-relative loads when resizing the
241 // the constant pool or moving it.
242 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
243 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
244
245 // Sizes
246 int size() const { return _size; }
247 int header_size() const { return _header_size; }
248 int relocation_size() const { return _relocation_size; }
249 int content_size() const { return pointer_delta_as_int(content_end(), content_begin()); }
250 int code_size() const { return pointer_delta_as_int(code_end(), code_begin()); }
251
252 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed
253 void adjust_size(size_t used) {
254 _size = (int)used;
255 _data_offset = _size;
256 }
257
258 // Containment
259 bool blob_contains(address addr) const { return header_begin() <= addr && addr < blob_end(); }
260 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
261 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
262 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
263 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
264 int frame_complete_offset() const { return _frame_complete_offset; }
265
266 // OopMap for frame
267 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
268 void set_oop_maps(OopMapSet* p);
269 void set_oop_maps(ImmutableOopMapSet* p) { _oop_maps = p; }
270
271 const ImmutableOopMap* oop_map_for_slot(int slot, address return_address) const;
272 const ImmutableOopMap* oop_map_for_return_address(address return_address) const;
273
274 // Frame support. Sizes are in word units.
275 int frame_size() const { return _frame_size; }
276 void set_frame_size(int size) { _frame_size = size; }
277
278 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
279 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
280
281 // Naming
282 const char* name() const { return _name; }
283 void set_name(const char* name) { _name = name; }
284
285 // Debugging
286 void verify();
287 void print() const;
288 void print_on(outputStream* st) const;
289 void print_value_on(outputStream* st) const;
290
291 void dump_for_addr(address addr, outputStream* st, bool verbose) const;
292 void print_code_on(outputStream* st);
293
294 // Print to stream, any comments associated with offset.
295 void print_block_comment(outputStream* stream, address block_begin) const;
296
297 #ifndef PRODUCT
298 AsmRemarks &asm_remarks() { return _asm_remarks; }
299 DbgStrings &dbg_strings() { return _dbg_strings; }
300
301 void use_remarks(AsmRemarks &remarks) { _asm_remarks.share(remarks); }
302 void use_strings(DbgStrings &strings) { _dbg_strings.share(strings); }
303 #endif
304
305 void copy_to(address buffer) {
306 memcpy(buffer, this, this->size());
307 }
308
309 // methods to archive a blob into AOT code cache
310 void prepare_for_archiving();
311 static void archive_blob(CodeBlob* blob, address archive_buffer);
312
313 // methods to restore a blob from AOT code cache into the CodeCache
314 void post_restore();
315 CodeBlob* restore(address code_cache_buffer, const char* name, address archived_reloc_data, ImmutableOopMapSet* archived_oop_maps);
316 static CodeBlob* create(CodeBlob* archived_blob,
317 const char* name,
318 address archived_reloc_data,
319 ImmutableOopMapSet* archived_oop_maps);
320 };
321
322 //----------------------------------------------------------------------------------------------------
323 // RuntimeBlob: used for non-compiled method code (adapters, stubs, blobs)
324
325 class RuntimeBlob : public CodeBlob {
326 friend class VMStructs;
327 public:
328
329 // Creation
330 // a) simple CodeBlob
331 RuntimeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size)
332 : CodeBlob(name, kind, size, header_size)
333 {}
334
335 // b) full CodeBlob
336 // frame_complete is the offset from the beginning of the instructions
337 // to where the frame setup (from stackwalk viewpoint) is complete.
338 RuntimeBlob(
339 const char* name,
340 CodeBlobKind kind,
341 CodeBuffer* cb,
342 int size,
343 uint16_t header_size,
344 int16_t frame_complete,
345 int frame_size,
346 OopMapSet* oop_maps,
347 bool caller_must_gc_arguments = false
348 );
349
350 static void free(RuntimeBlob* blob);
351
352 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
353 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
354
355 class Vptr : public CodeBlob::Vptr {
356 };
357 };
358
359 class WhiteBox;
360 //----------------------------------------------------------------------------------------------------
361 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
362
363 class BufferBlob: public RuntimeBlob {
364 friend class VMStructs;
365 friend class AdapterBlob;
366 friend class VtableBlob;
367 friend class MethodHandlesAdapterBlob;
368 friend class UpcallStub;
369 friend class WhiteBox;
370
371 private:
372 // Creation support
373 BufferBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size = sizeof(BufferBlob));
374 BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size = sizeof(BufferBlob));
375
376 void* operator new(size_t s, unsigned size) throw();
377
378 public:
379 // Creation
380 static BufferBlob* create(const char* name, uint buffer_size);
381 static BufferBlob* create(const char* name, CodeBuffer* cb);
382
383 static void free(BufferBlob* buf);
384
385 void print_on_impl(outputStream* st) const;
386 void print_value_on_impl(outputStream* st) const;
387
388 class Vptr : public RuntimeBlob::Vptr {
389 void print_on(const CodeBlob* instance, outputStream* st) const override {
390 ((const BufferBlob*)instance)->print_on_impl(st);
391 }
392 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
393 ((const BufferBlob*)instance)->print_value_on_impl(st);
394 }
395 };
396
397 static const Vptr _vpntr;
398 };
399
400
401 //----------------------------------------------------------------------------------------------------
402 // AdapterBlob: used to hold C2I/I2C adapters
403
404 class AdapterBlob: public BufferBlob {
405 public:
406 static const int ENTRY_COUNT = 4;
407 private:
408 AdapterBlob(int size, CodeBuffer* cb, int entry_offset[ENTRY_COUNT]);
409 // _i2c_offset is always 0 so no need to store it
410 int _c2i_offset;
411 int _c2i_unverified_offset;
412 int _c2i_no_clinit_check_offset;
413 public:
414 // Creation
415 static AdapterBlob* create(CodeBuffer* cb, int entry_offset[ENTRY_COUNT]);
416 void get_offsets(int entry_offset[ENTRY_COUNT]);
417 };
418
419 //---------------------------------------------------------------------------------------------------
420 class VtableBlob: public BufferBlob {
421 private:
422 VtableBlob(const char*, int);
423
424 void* operator new(size_t s, unsigned size) throw();
425
426 public:
427 // Creation
428 static VtableBlob* create(const char* name, int buffer_size);
429 };
430
431 //----------------------------------------------------------------------------------------------------
432 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
433
434 class MethodHandlesAdapterBlob: public BufferBlob {
435 private:
436 MethodHandlesAdapterBlob(int size): BufferBlob("MethodHandles adapters", CodeBlobKind::MHAdapter, size) {}
437
438 public:
439 // Creation
440 static MethodHandlesAdapterBlob* create(int buffer_size);
441 };
442
443
444 //----------------------------------------------------------------------------------------------------
445 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
446
447 class RuntimeStub: public RuntimeBlob {
448 friend class VMStructs;
449 private:
450 // Creation support
451 RuntimeStub(
452 const char* name,
453 CodeBuffer* cb,
454 int size,
455 int16_t frame_complete,
456 int frame_size,
457 OopMapSet* oop_maps,
458 bool caller_must_gc_arguments
459 );
460
461 void* operator new(size_t s, unsigned size) throw();
462
463 public:
464 static const int ENTRY_COUNT = 1;
465 // Creation
466 static RuntimeStub* new_runtime_stub(
467 const char* stub_name,
468 CodeBuffer* cb,
469 int16_t frame_complete,
470 int frame_size,
471 OopMapSet* oop_maps,
472 bool caller_must_gc_arguments,
473 bool alloc_fail_is_fatal=true
474 );
475
476 static void free(RuntimeStub* stub) { RuntimeBlob::free(stub); }
477
478 address entry_point() const { return code_begin(); }
479
480 void print_on_impl(outputStream* st) const;
481 void print_value_on_impl(outputStream* st) const;
482
483 class Vptr : public RuntimeBlob::Vptr {
484 void print_on(const CodeBlob* instance, outputStream* st) const override {
485 instance->as_runtime_stub()->print_on_impl(st);
486 }
487 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
488 instance->as_runtime_stub()->print_value_on_impl(st);
489 }
490 };
491
492 static const Vptr _vpntr;
493 };
494
495
496 //----------------------------------------------------------------------------------------------------
497 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
498
499 class SingletonBlob: public RuntimeBlob {
500 friend class VMStructs;
501
502 protected:
503 void* operator new(size_t s, unsigned size, bool alloc_fail_is_fatal=true) throw();
504
505 public:
506 SingletonBlob(
507 const char* name,
508 CodeBlobKind kind,
509 CodeBuffer* cb,
510 int size,
511 uint16_t header_size,
512 int frame_size,
513 OopMapSet* oop_maps
514 )
515 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
516 {};
517
518 address entry_point() { return code_begin(); }
519
520 void print_on_impl(outputStream* st) const;
521 void print_value_on_impl(outputStream* st) const;
522
523 class Vptr : public RuntimeBlob::Vptr {
524 void print_on(const CodeBlob* instance, outputStream* st) const override {
525 ((const SingletonBlob*)instance)->print_on_impl(st);
526 }
527 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
528 ((const SingletonBlob*)instance)->print_value_on_impl(st);
529 }
530 };
531
532 static const Vptr _vpntr;
533 };
534
535
536 //----------------------------------------------------------------------------------------------------
537 // DeoptimizationBlob
538
539 class DeoptimizationBlob: public SingletonBlob {
540 friend class VMStructs;
541 friend class JVMCIVMStructs;
542 private:
543 int _unpack_offset;
544 int _unpack_with_exception;
545 int _unpack_with_reexecution;
546
547 int _unpack_with_exception_in_tls;
548
549 #if INCLUDE_JVMCI
550 // Offsets when JVMCI calls uncommon_trap.
551 int _uncommon_trap_offset;
552 int _implicit_exception_uncommon_trap_offset;
553 #endif
554
555 // Creation support
556 DeoptimizationBlob(
557 CodeBuffer* cb,
558 int size,
559 OopMapSet* oop_maps,
560 int unpack_offset,
561 int unpack_with_exception_offset,
562 int unpack_with_reexecution_offset,
563 int frame_size
564 );
565
566 public:
567 static const int ENTRY_COUNT = 4 JVMTI_ONLY(+ 2);
568 // Creation
569 static DeoptimizationBlob* create(
570 CodeBuffer* cb,
571 OopMapSet* oop_maps,
572 int unpack_offset,
573 int unpack_with_exception_offset,
574 int unpack_with_reexecution_offset,
575 int frame_size
576 );
577
578 address unpack() const { return code_begin() + _unpack_offset; }
579 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
580 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
581
582 // Alternate entry point for C1 where the exception and issuing pc
583 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
584 // instead of being in registers. This is needed because C1 doesn't
585 // model exception paths in a way that keeps these registers free so
586 // there may be live values in those registers during deopt.
587 void set_unpack_with_exception_in_tls_offset(int offset) {
588 _unpack_with_exception_in_tls = offset;
589 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
590 }
591 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
592
593 #if INCLUDE_JVMCI
594 // Offsets when JVMCI calls uncommon_trap.
595 void set_uncommon_trap_offset(int offset) {
596 _uncommon_trap_offset = offset;
597 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
598 }
599 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
600
601 void set_implicit_exception_uncommon_trap_offset(int offset) {
602 _implicit_exception_uncommon_trap_offset = offset;
603 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
604 }
605 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
606 #endif // INCLUDE_JVMCI
607
608 void print_value_on_impl(outputStream* st) const;
609
610 class Vptr : public SingletonBlob::Vptr {
611 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
612 ((const DeoptimizationBlob*)instance)->print_value_on_impl(st);
613 }
614 };
615
616 static const Vptr _vpntr;
617 };
618
619
620 //----------------------------------------------------------------------------------------------------
621 // UncommonTrapBlob (currently only used by Compiler 2)
622
623 #ifdef COMPILER2
624
625 class UncommonTrapBlob: public SingletonBlob {
626 friend class VMStructs;
627 private:
628 // Creation support
629 UncommonTrapBlob(
630 CodeBuffer* cb,
631 int size,
632 OopMapSet* oop_maps,
633 int frame_size
634 );
635
636 public:
637 // Creation
638 static UncommonTrapBlob* create(
639 CodeBuffer* cb,
640 OopMapSet* oop_maps,
641 int frame_size
642 );
643 };
644
645
646 //----------------------------------------------------------------------------------------------------
647 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
648
649 class ExceptionBlob: public SingletonBlob {
650 friend class VMStructs;
651 private:
652 // Creation support
653 ExceptionBlob(
654 CodeBuffer* cb,
655 int size,
656 OopMapSet* oop_maps,
657 int frame_size
658 );
659
660 public:
661 // Creation
662 static ExceptionBlob* create(
663 CodeBuffer* cb,
664 OopMapSet* oop_maps,
665 int frame_size
666 );
667
668 void post_restore_impl() {
669 trace_new_stub(this, "ExceptionBlob");
670 }
671
672 class Vptr : public SingletonBlob::Vptr {
673 void post_restore(CodeBlob* instance) const override {
674 ((ExceptionBlob*)instance)->post_restore_impl();
675 }
676 };
677
678 static const Vptr _vpntr;
679 };
680 #endif // COMPILER2
681
682
683 //----------------------------------------------------------------------------------------------------
684 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
685
686 class SafepointBlob: public SingletonBlob {
687 friend class VMStructs;
688 private:
689 // Creation support
690 SafepointBlob(
691 CodeBuffer* cb,
692 int size,
693 OopMapSet* oop_maps,
694 int frame_size
695 );
696
697 public:
698 static const int ENTRY_COUNT = 1;
699 // Creation
700 static SafepointBlob* create(
701 CodeBuffer* cb,
702 OopMapSet* oop_maps,
703 int frame_size
704 );
705 };
706
707 //----------------------------------------------------------------------------------------------------
708
709 class UpcallLinker;
710
711 // A (Panama) upcall stub. Not used by JNI.
712 class UpcallStub: public RuntimeBlob {
713 friend class VMStructs;
714 friend class UpcallLinker;
715 private:
716 jobject _receiver;
717 ByteSize _frame_data_offset;
718
719 UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset);
720
721 void* operator new(size_t s, unsigned size) throw();
722
723 struct FrameData {
724 JavaFrameAnchor jfa;
725 JavaThread* thread;
726 JNIHandleBlock* old_handles;
727 JNIHandleBlock* new_handles;
728 };
729
730 // defined in frame_ARCH.cpp
731 FrameData* frame_data_for_frame(const frame& frame) const;
732 public:
733 // Creation
734 static UpcallStub* create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset);
735
736 static void free(UpcallStub* blob);
737
738 jobject receiver() { return _receiver; }
739
740 JavaFrameAnchor* jfa_for_frame(const frame& frame) const;
741
742 // GC support
743 void oops_do(OopClosure* f, const frame& frame);
744
745 void print_on_impl(outputStream* st) const;
746 void print_value_on_impl(outputStream* st) const;
747
748 class Vptr : public RuntimeBlob::Vptr {
749 void print_on(const CodeBlob* instance, outputStream* st) const override {
750 instance->as_upcall_stub()->print_on_impl(st);
751 }
752 void print_value_on(const CodeBlob* instance, outputStream* st) const override {
753 instance->as_upcall_stub()->print_value_on_impl(st);
754 }
755 };
756
757 static const Vptr _vpntr;
758 };
759
760 #endif // SHARE_CODE_CODEBLOB_HPP