1 /*
2 * Copyright (c) 1998, 2021, 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 "runtime/javaFrameAnchor.hpp"
31 #include "runtime/frame.hpp"
32 #include "runtime/handles.hpp"
33 #include "utilities/align.hpp"
34 #include "utilities/macros.hpp"
35
36 class ImmutableOopMap;
37 class ImmutableOopMapSet;
38 class JNIHandleBlock;
39 class OopMapSet;
40
41 // CodeBlob Types
42 // Used in the CodeCache to assign CodeBlobs to different CodeHeaps
43 struct CodeBlobType {
44 enum {
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
53 // CodeBlob - superclass for all entries in the CodeCache.
54 //
55 // Subtypes are:
56 // CompiledMethod : Compiled Java methods (include method that calls to native code)
57 // nmethod : JIT Compiled Java methods
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 // OptimizedEntryBlob : Used for upcalls from native code
64 // RuntimeStub : Call to VM runtime methods
65 // SingletonBlob : Super-class for all blobs that exist in only one instance
66 // DeoptimizationBlob : Used for deoptimization
67 // ExceptionBlob : Used for stack unrolling
68 // SafepointBlob : Used to handle illegal instruction exceptions
69 // UncommonTrapBlob : Used to handle uncommon traps
70 //
71 //
72 // Layout : continuous in the CodeCache
73 // - header
74 // - relocation
75 // - content space
76 // - instruction space
77 // - data space
78
79
80 class CodeBlobLayout;
81 class OptimizedEntryBlob; // for as_optimized_entry_blob()
82 class JavaFrameAnchor; // for OptimizedEntryBlob::jfa_for_frame
83
84 class CodeBlob {
85 friend class VMStructs;
86 friend class JVMCIVMStructs;
87 friend class CodeCacheDumper;
88
89 protected:
90
91 const CompilerType _type; // CompilerType
92 int _size; // total size of CodeBlob in bytes
93 int _header_size; // size of header (depends on subclass)
94 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have
95 // not finished setting up their frame. Beware of pc's in
96 // that range. There is a similar range(s) on returns
97 // which we don't detect.
98 int _data_offset; // offset to where data region begins
99 int _frame_size; // size of stack frame
100
101 address _code_begin;
102 address _code_end;
103 address _content_begin; // address to where content region begins (this includes consts, insts, stubs)
104 // address _content_end - not required, for all CodeBlobs _code_end == _content_end for now
105 address _data_end;
106 address _relocation_begin;
107 address _relocation_end;
108
109 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob
110 bool _caller_must_gc_arguments;
111
112 const char* _name;
113 S390_ONLY(int _ctable_offset;)
114
115 #ifndef PRODUCT
116 AsmRemarks _asm_remarks;
117 DbgStrings _dbg_strings;
118
119 ~CodeBlob() {
120 _asm_remarks.clear();
121 _dbg_strings.clear();
122 }
123 #endif // not PRODUCT
124
125 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, int frame_complete_offset, int frame_size, ImmutableOopMapSet* oop_maps, bool caller_must_gc_arguments);
126 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);
127
128 public:
129 // Only used by unit test.
130 CodeBlob() : _type(compiler_none) {}
131
132 // Returns the space needed for CodeBlob
133 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
134 static unsigned int align_code_offset(int offset);
135
136 // Deletion
137 virtual void flush();
138
139 // Typing
140 virtual bool is_buffer_blob() const { return false; }
141 virtual bool is_nmethod() const { return false; }
142 virtual bool is_runtime_stub() const { return false; }
143 virtual bool is_deoptimization_stub() const { return false; }
144 virtual bool is_uncommon_trap_stub() const { return false; }
145 virtual bool is_exception_stub() const { return false; }
146 virtual bool is_safepoint_stub() const { return false; }
147 virtual bool is_adapter_blob() const { return false; }
148 virtual bool is_vtable_blob() const { return false; }
149 virtual bool is_method_handles_adapter_blob() const { return false; }
150 virtual bool is_compiled() const { return false; }
151 virtual bool is_optimized_entry_blob() const { return false; }
152
153 inline bool is_compiled_by_c1() const { return _type == compiler_c1; };
154 inline bool is_compiled_by_c2() const { return _type == compiler_c2; };
155 inline bool is_compiled_by_jvmci() const { return _type == compiler_jvmci; };
156 const char* compiler_name() const;
157 CompilerType compiler_type() const { return _type; }
158
159 // Casting
160 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; }
161 nmethod* as_nmethod() { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
162 CompiledMethod* as_compiled_method_or_null() { return is_compiled() ? (CompiledMethod*) this : NULL; }
163 CompiledMethod* as_compiled_method() { assert(is_compiled(), "must be compiled"); return (CompiledMethod*) this; }
164 CodeBlob* as_codeblob_or_null() const { return (CodeBlob*) this; }
165 OptimizedEntryBlob* as_optimized_entry_blob() const { assert(is_optimized_entry_blob(), "must be entry blob"); return (OptimizedEntryBlob*) this; }
166
167 // Boundaries
168 address header_begin() const { return (address) this; }
169 relocInfo* relocation_begin() const { return (relocInfo*) _relocation_begin; };
170 relocInfo* relocation_end() const { return (relocInfo*) _relocation_end; }
171 address content_begin() const { return _content_begin; }
172 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
173 address code_begin() const { return _code_begin; }
174 address code_end() const { return _code_end; }
175 address data_end() const { return _data_end; }
176
177 // This field holds the beginning of the const section in the old code buffer.
178 // It is needed to fix relocations of pc-relative loads when resizing the
179 // the constant pool or moving it.
180 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
181 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
182
183 // Sizes
184 int size() const { return _size; }
185 int header_size() const { return _header_size; }
186 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); }
187 int content_size() const { return content_end() - content_begin(); }
188 int code_size() const { return code_end() - code_begin(); }
189 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed
190 void adjust_size(size_t used) {
191 _size = (int)used;
192 _data_offset = (int)used;
193 _code_end = (address)this + used;
194 _data_end = (address)this + used;
195 }
196
197 // Containment
198 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); }
199 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
200 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
201 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
202 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
203 int frame_complete_offset() const { return _frame_complete_offset; }
204
205 // CodeCache support: really only used by the nmethods, but in order to get
206 // asserts and certain bookkeeping to work in the CodeCache they are defined
207 // virtual here.
208 virtual bool is_zombie() const { return false; }
209 virtual bool is_locked_by_vm() const { return false; }
210
211 virtual bool is_unloaded() const { return false; }
212 virtual bool is_not_entrant() const { return false; }
213
214 // GC support
215 virtual bool is_alive() const = 0;
216
217 // OopMap for frame
218 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
219 void set_oop_maps(OopMapSet* p);
220 const ImmutableOopMap* oop_map_for_return_address(address return_address);
221 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) = 0;
222
223 // Frame support. Sizes are in word units.
224 int frame_size() const { return _frame_size; }
225 void set_frame_size(int size) { _frame_size = size; }
226
227 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
228 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
229
230 // Naming
231 const char* name() const { return _name; }
232 void set_name(const char* name) { _name = name; }
233
234 // Debugging
235 virtual void verify() = 0;
236 virtual void print() const;
237 virtual void print_on(outputStream* st) const;
238 virtual void print_value_on(outputStream* st) const;
239 void dump_for_addr(address addr, outputStream* st, bool verbose) const;
240 void print_code();
241
242 // Print to stream, any comments associated with offset.
243 virtual void print_block_comment(outputStream* stream, address block_begin) const {
244 #ifndef PRODUCT
245 ptrdiff_t offset = block_begin - code_begin();
246 assert(offset >= 0, "Expecting non-negative offset!");
247 _asm_remarks.print(uint(offset), stream);
248 #endif
249 }
250
251 #ifndef PRODUCT
252 AsmRemarks &asm_remarks() { return _asm_remarks; }
253 DbgStrings &dbg_strings() { return _dbg_strings; }
254
255 void use_remarks(AsmRemarks &remarks) { _asm_remarks.share(remarks); }
256 void use_strings(DbgStrings &strings) { _dbg_strings.share(strings); }
257 #endif
258 };
259
260 class CodeBlobLayout : public StackObj {
261 private:
262 int _size;
263 int _header_size;
264 int _relocation_size;
265 int _content_offset;
266 int _code_offset;
267 int _data_offset;
268 address _code_begin;
269 address _code_end;
270 address _content_begin;
271 address _content_end;
272 address _data_end;
273 address _relocation_begin;
274 address _relocation_end;
275
276 public:
277 CodeBlobLayout(address code_begin, address code_end, address content_begin, address content_end, address data_end, address relocation_begin, address relocation_end) :
278 _size(0),
279 _header_size(0),
280 _relocation_size(0),
281 _content_offset(0),
282 _code_offset(0),
283 _data_offset(0),
284 _code_begin(code_begin),
285 _code_end(code_end),
286 _content_begin(content_begin),
287 _content_end(content_end),
288 _data_end(data_end),
289 _relocation_begin(relocation_begin),
290 _relocation_end(relocation_end)
291 {
292 }
293
294 CodeBlobLayout(const address start, int size, int header_size, int relocation_size, int data_offset) :
295 _size(size),
296 _header_size(header_size),
297 _relocation_size(relocation_size),
298 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
299 _code_offset(_content_offset),
300 _data_offset(data_offset)
301 {
302 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
303
304 _code_begin = (address) start + _code_offset;
305 _code_end = (address) start + _data_offset;
306
307 _content_begin = (address) start + _content_offset;
308 _content_end = (address) start + _data_offset;
309
310 _data_end = (address) start + _size;
311 _relocation_begin = (address) start + _header_size;
312 _relocation_end = _relocation_begin + _relocation_size;
313 }
314
315 CodeBlobLayout(const address start, int size, int header_size, const CodeBuffer* cb) :
316 _size(size),
317 _header_size(header_size),
318 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
319 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
320 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
321 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize))
322 {
323 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
324
325 _code_begin = (address) start + _code_offset;
326 _code_end = (address) start + _data_offset;
327
328 _content_begin = (address) start + _content_offset;
329 _content_end = (address) start + _data_offset;
330
331 _data_end = (address) start + _size;
332 _relocation_begin = (address) start + _header_size;
333 _relocation_end = _relocation_begin + _relocation_size;
334 }
335
336 int size() const { return _size; }
337 int header_size() const { return _header_size; }
338 int relocation_size() const { return _relocation_size; }
339 int content_offset() const { return _content_offset; }
340 int code_offset() const { return _code_offset; }
341 int data_offset() const { return _data_offset; }
342 address code_begin() const { return _code_begin; }
343 address code_end() const { return _code_end; }
344 address data_end() const { return _data_end; }
345 address relocation_begin() const { return _relocation_begin; }
346 address relocation_end() const { return _relocation_end; }
347 address content_begin() const { return _content_begin; }
348 address content_end() const { return _content_end; }
349 };
350
351
352 class RuntimeBlob : public CodeBlob {
353 friend class VMStructs;
354 public:
355
356 // Creation
357 // a) simple CodeBlob
358 // frame_complete is the offset from the beginning of the instructions
359 // to where the frame setup (from stackwalk viewpoint) is complete.
360 RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size);
361
362 // b) full CodeBlob
363 RuntimeBlob(
364 const char* name,
365 CodeBuffer* cb,
366 int header_size,
367 int size,
368 int frame_complete,
369 int frame_size,
370 OopMapSet* oop_maps,
371 bool caller_must_gc_arguments = false
372 );
373
374 // GC support
375 virtual bool is_alive() const = 0;
376
377 void verify();
378
379 // OopMap for frame
380 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); }
381
382 // Debugging
383 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); }
384 virtual void print_value_on(outputStream* st) const { CodeBlob::print_value_on(st); }
385
386 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
387 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
388 };
389
390 class WhiteBox;
391 //----------------------------------------------------------------------------------------------------
392 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
393
394 class BufferBlob: public RuntimeBlob {
395 friend class VMStructs;
396 friend class AdapterBlob;
397 friend class VtableBlob;
398 friend class MethodHandlesAdapterBlob;
399 friend class OptimizedEntryBlob;
400 friend class WhiteBox;
401
402 private:
403 // Creation support
404 BufferBlob(const char* name, int size);
405 BufferBlob(const char* name, int size, CodeBuffer* cb);
406
407 // This ordinary operator delete is needed even though not used, so the
408 // below two-argument operator delete will be treated as a placement
409 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
410 void operator delete(void* p);
411 void* operator new(size_t s, unsigned size) throw();
412
413 public:
414 // Creation
415 static BufferBlob* create(const char* name, int buffer_size);
416 static BufferBlob* create(const char* name, CodeBuffer* cb);
417
418 static void free(BufferBlob* buf);
419
420 // Typing
421 virtual bool is_buffer_blob() const { return true; }
422
423 // GC/Verification support
424 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
425 bool is_alive() const { return true; }
426
427 void verify();
428 void print_on(outputStream* st) const;
429 void print_value_on(outputStream* st) const;
430 };
431
432
433 //----------------------------------------------------------------------------------------------------
434 // AdapterBlob: used to hold C2I/I2C adapters
435
436 class AdapterBlob: public BufferBlob {
437 private:
438 AdapterBlob(int size, CodeBuffer* cb);
439
440 public:
441 // Creation
442 static AdapterBlob* create(CodeBuffer* cb);
443
444 // Typing
445 virtual bool is_adapter_blob() const { return true; }
446 };
447
448 //---------------------------------------------------------------------------------------------------
449 class VtableBlob: public BufferBlob {
450 private:
451 VtableBlob(const char*, int);
452
453 void* operator new(size_t s, unsigned size) throw();
454
455 public:
456 // Creation
457 static VtableBlob* create(const char* name, int buffer_size);
458
459 // Typing
460 virtual bool is_vtable_blob() const { return true; }
461 };
462
463 //----------------------------------------------------------------------------------------------------
464 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
465
466 class MethodHandlesAdapterBlob: public BufferBlob {
467 private:
468 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {}
469
470 public:
471 // Creation
472 static MethodHandlesAdapterBlob* create(int buffer_size);
473
474 // Typing
475 virtual bool is_method_handles_adapter_blob() const { return true; }
476 };
477
478
479 //----------------------------------------------------------------------------------------------------
480 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
481
482 class RuntimeStub: public RuntimeBlob {
483 friend class VMStructs;
484 private:
485 // Creation support
486 RuntimeStub(
487 const char* name,
488 CodeBuffer* cb,
489 int size,
490 int frame_complete,
491 int frame_size,
492 OopMapSet* oop_maps,
493 bool caller_must_gc_arguments
494 );
495
496 // This ordinary operator delete is needed even though not used, so the
497 // below two-argument operator delete will be treated as a placement
498 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
499 void operator delete(void* p);
500 void* operator new(size_t s, unsigned size) throw();
501
502 public:
503 // Creation
504 static RuntimeStub* new_runtime_stub(
505 const char* stub_name,
506 CodeBuffer* cb,
507 int frame_complete,
508 int frame_size,
509 OopMapSet* oop_maps,
510 bool caller_must_gc_arguments
511 );
512
513 // Typing
514 bool is_runtime_stub() const { return true; }
515
516 address entry_point() const { return code_begin(); }
517
518 // GC/Verification support
519 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
520 bool is_alive() const { return true; }
521
522 void verify();
523 void print_on(outputStream* st) const;
524 void print_value_on(outputStream* st) const;
525 };
526
527
528 //----------------------------------------------------------------------------------------------------
529 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
530
531 class SingletonBlob: public RuntimeBlob {
532 friend class VMStructs;
533
534 protected:
535 // This ordinary operator delete is needed even though not used, so the
536 // below two-argument operator delete will be treated as a placement
537 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
538 void operator delete(void* p);
539 void* operator new(size_t s, unsigned size) throw();
540
541 public:
542 SingletonBlob(
543 const char* name,
544 CodeBuffer* cb,
545 int header_size,
546 int size,
547 int frame_size,
548 OopMapSet* oop_maps
549 )
550 : RuntimeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
551 {};
552
553 address entry_point() { return code_begin(); }
554
555 bool is_alive() const { return true; }
556
557 // GC/Verification support
558 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
559 void verify(); // does nothing
560 void print_on(outputStream* st) const;
561 void print_value_on(outputStream* st) const;
562 };
563
564
565 //----------------------------------------------------------------------------------------------------
566 // DeoptimizationBlob
567
568 class DeoptimizationBlob: public SingletonBlob {
569 friend class VMStructs;
570 friend class JVMCIVMStructs;
571 private:
572 int _unpack_offset;
573 int _unpack_with_exception;
574 int _unpack_with_reexecution;
575
576 int _unpack_with_exception_in_tls;
577
578 #if INCLUDE_JVMCI
579 // Offsets when JVMCI calls uncommon_trap.
580 int _uncommon_trap_offset;
581 int _implicit_exception_uncommon_trap_offset;
582 #endif
583
584 // Creation support
585 DeoptimizationBlob(
586 CodeBuffer* cb,
587 int size,
588 OopMapSet* oop_maps,
589 int unpack_offset,
590 int unpack_with_exception_offset,
591 int unpack_with_reexecution_offset,
592 int frame_size
593 );
594
595 public:
596 // Creation
597 static DeoptimizationBlob* create(
598 CodeBuffer* cb,
599 OopMapSet* oop_maps,
600 int unpack_offset,
601 int unpack_with_exception_offset,
602 int unpack_with_reexecution_offset,
603 int frame_size
604 );
605
606 // Typing
607 bool is_deoptimization_stub() const { return true; }
608
609 // GC for args
610 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
611
612 // Printing
613 void print_value_on(outputStream* st) const;
614
615 address unpack() const { return code_begin() + _unpack_offset; }
616 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
617 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
618
619 // Alternate entry point for C1 where the exception and issuing pc
620 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
621 // instead of being in registers. This is needed because C1 doesn't
622 // model exception paths in a way that keeps these registers free so
623 // there may be live values in those registers during deopt.
624 void set_unpack_with_exception_in_tls_offset(int offset) {
625 _unpack_with_exception_in_tls = offset;
626 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
627 }
628 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
629
630 #if INCLUDE_JVMCI
631 // Offsets when JVMCI calls uncommon_trap.
632 void set_uncommon_trap_offset(int offset) {
633 _uncommon_trap_offset = offset;
634 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
635 }
636 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
637
638 void set_implicit_exception_uncommon_trap_offset(int offset) {
639 _implicit_exception_uncommon_trap_offset = offset;
640 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
641 }
642 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
643 #endif // INCLUDE_JVMCI
644 };
645
646
647 //----------------------------------------------------------------------------------------------------
648 // UncommonTrapBlob (currently only used by Compiler 2)
649
650 #ifdef COMPILER2
651
652 class UncommonTrapBlob: public SingletonBlob {
653 friend class VMStructs;
654 private:
655 // Creation support
656 UncommonTrapBlob(
657 CodeBuffer* cb,
658 int size,
659 OopMapSet* oop_maps,
660 int frame_size
661 );
662
663 public:
664 // Creation
665 static UncommonTrapBlob* create(
666 CodeBuffer* cb,
667 OopMapSet* oop_maps,
668 int frame_size
669 );
670
671 // GC for args
672 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
673
674 // Typing
675 bool is_uncommon_trap_stub() const { return true; }
676 };
677
678
679 //----------------------------------------------------------------------------------------------------
680 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
681
682 class ExceptionBlob: public SingletonBlob {
683 friend class VMStructs;
684 private:
685 // Creation support
686 ExceptionBlob(
687 CodeBuffer* cb,
688 int size,
689 OopMapSet* oop_maps,
690 int frame_size
691 );
692
693 public:
694 // Creation
695 static ExceptionBlob* create(
696 CodeBuffer* cb,
697 OopMapSet* oop_maps,
698 int frame_size
699 );
700
701 // GC for args
702 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
703
704 // Typing
705 bool is_exception_stub() const { return true; }
706 };
707 #endif // COMPILER2
708
709
710 //----------------------------------------------------------------------------------------------------
711 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
712
713 class SafepointBlob: public SingletonBlob {
714 friend class VMStructs;
715 private:
716 // Creation support
717 SafepointBlob(
718 CodeBuffer* cb,
719 int size,
720 OopMapSet* oop_maps,
721 int frame_size
722 );
723
724 public:
725 // Creation
726 static SafepointBlob* create(
727 CodeBuffer* cb,
728 OopMapSet* oop_maps,
729 int frame_size
730 );
731
732 // GC for args
733 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
734
735 // Typing
736 bool is_safepoint_stub() const { return true; }
737 };
738
739 //----------------------------------------------------------------------------------------------------
740
741 class ProgrammableUpcallHandler;
742
743 class OptimizedEntryBlob: public BufferBlob {
744 friend class ProgrammableUpcallHandler;
745 private:
746 intptr_t _exception_handler_offset;
747 jobject _receiver;
748 ByteSize _frame_data_offset;
749
750 OptimizedEntryBlob(const char* name, int size, CodeBuffer* cb, intptr_t exception_handler_offset,
751 jobject receiver, ByteSize frame_data_offset);
752
753 struct FrameData {
754 JavaFrameAnchor jfa;
755 JavaThread* thread;
756 JNIHandleBlock* old_handles;
757 JNIHandleBlock* new_handles;
758 bool should_detach;
759 };
760
761 // defined in frame_ARCH.cpp
762 FrameData* frame_data_for_frame(const frame& frame) const;
763 public:
764 // Creation
765 static OptimizedEntryBlob* create(const char* name, CodeBuffer* cb,
766 intptr_t exception_handler_offset, jobject receiver,
767 ByteSize frame_data_offset);
768
769 address exception_handler() { return code_begin() + _exception_handler_offset; }
770 jobject receiver() { return _receiver; }
771
772 JavaFrameAnchor* jfa_for_frame(const frame& frame) const;
773
774 void oops_do(OopClosure* f, const frame& frame);
775
776 // Typing
777 virtual bool is_optimized_entry_blob() const override { return true; }
778 };
779
780 #endif // SHARE_CODE_CODEBLOB_HPP