1 /*
2 * Copyright (c) 1998, 2019, 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 "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
120 public:
121 // Only used by unit test.
122 CodeBlob()
123 : _type(compiler_none) {}
124
125 // Returns the space needed for CodeBlob
126 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
127 static unsigned int align_code_offset(int offset);
128
129 // Deletion
130 virtual void flush();
131
132 // Typing
133 virtual bool is_buffer_blob() const { return false; }
134 virtual bool is_nmethod() const { return false; }
135 virtual bool is_runtime_stub() const { return false; }
136 virtual bool is_deoptimization_stub() const { return false; }
137 virtual bool is_uncommon_trap_stub() const { return false; }
138 virtual bool is_exception_stub() const { return false; }
139 virtual bool is_safepoint_stub() const { return false; }
140 virtual bool is_adapter_blob() const { return false; }
141 virtual bool is_vtable_blob() const { return false; }
142 virtual bool is_method_handles_adapter_blob() const { return false; }
143 virtual bool is_aot() const { return false; }
144 virtual bool is_compiled() const { return false; }
145 virtual bool is_buffered_value_type_blob() const { return false; }
146
147 inline bool is_compiled_by_c1() const { return _type == compiler_c1; };
148 inline bool is_compiled_by_c2() const { return _type == compiler_c2; };
149 inline bool is_compiled_by_jvmci() const { return _type == compiler_jvmci; };
150 const char* compiler_name() const;
151
152 // Casting
153 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; }
154 nmethod* as_nmethod() { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
155 CompiledMethod* as_compiled_method_or_null() { return is_compiled() ? (CompiledMethod*) this : NULL; }
156 CompiledMethod* as_compiled_method() { assert(is_compiled(), "must be compiled"); return (CompiledMethod*) this; }
157 CodeBlob* as_codeblob_or_null() const { return (CodeBlob*) this; }
158
159 // Boundaries
160 address header_begin() const { return (address) this; }
161 relocInfo* relocation_begin() const { return (relocInfo*) _relocation_begin; };
162 relocInfo* relocation_end() const { return (relocInfo*) _relocation_end; }
163 address content_begin() const { return _content_begin; }
164 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
165 address code_begin() const { return _code_begin; }
166 address code_end() const { return _code_end; }
167 address data_end() const { return _data_end; }
168
169 // This field holds the beginning of the const section in the old code buffer.
170 // It is needed to fix relocations of pc-relative loads when resizing the
171 // the constant pool or moving it.
172 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
173 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
174
175 // Sizes
176 int size() const { return _size; }
177 int header_size() const { return _header_size; }
178 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); }
179 int content_size() const { return content_end() - content_begin(); }
180 int code_size() const { return code_end() - code_begin(); }
181 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed
182 void adjust_size(size_t used) {
183 _size = (int)used;
184 _data_offset = (int)used;
185 _code_end = (address)this + used;
186 _data_end = (address)this + used;
187 }
188
189 // Containment
190 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); }
191 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
192 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
193 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
194 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
195 int frame_complete_offset() const { return _frame_complete_offset; }
196
197 // CodeCache support: really only used by the nmethods, but in order to get
198 // asserts and certain bookkeeping to work in the CodeCache they are defined
199 // virtual here.
200 virtual bool is_zombie() const { return false; }
201 virtual bool is_locked_by_vm() const { return false; }
202
203 virtual bool is_unloaded() const { return false; }
204 virtual bool is_not_entrant() const { return false; }
205
206 // GC support
207 virtual bool is_alive() const = 0;
208
209 // OopMap for frame
210 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
211 void set_oop_maps(OopMapSet* p);
212 const ImmutableOopMap* oop_map_for_return_address(address return_address);
213 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) = 0;
214
215 // Frame support
216 int frame_size() const { return _frame_size; }
217 void set_frame_size(int size) { _frame_size = size; }
218
219 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
220 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
221
222 // Naming
223 const char* name() const { return _name; }
224 void set_name(const char* name) { _name = name; }
225
226 // Debugging
227 virtual void verify() = 0;
228 virtual void print() const { print_on(tty); };
229 virtual void print_on(outputStream* st) const;
230 virtual void print_value_on(outputStream* st) const;
231 void dump_for_addr(address addr, outputStream* st, bool verbose) const;
232 void print_code();
233
234 // Print the comment associated with offset on stream, if there is one
235 virtual void print_block_comment(outputStream* stream, address block_begin) const {
236 intptr_t offset = (intptr_t)(block_begin - code_begin());
237 _strings.print_block_comment(stream, offset);
238 }
239
240 // Transfer ownership of comments to this CodeBlob
241 void set_strings(CodeStrings& strings) {
242 assert(!is_aot(), "invalid on aot");
243 _strings.assign(strings);
244 }
245
246 static ByteSize name_field_offset() {
247 return byte_offset_of(CodeBlob, _name);
248 }
249
250 static ByteSize oop_maps_field_offset() {
251 return byte_offset_of(CodeBlob, _oop_maps);
252 }
253 };
254
255 class CodeBlobLayout : public StackObj {
256 private:
257 int _size;
258 int _header_size;
259 int _relocation_size;
260 int _content_offset;
261 int _code_offset;
262 int _data_offset;
263 address _code_begin;
264 address _code_end;
265 address _content_begin;
266 address _content_end;
267 address _data_end;
268 address _relocation_begin;
269 address _relocation_end;
270
271 public:
272 CodeBlobLayout(address code_begin, address code_end, address content_begin, address content_end, address data_end, address relocation_begin, address relocation_end) :
273 _size(0),
274 _header_size(0),
275 _relocation_size(0),
276 _content_offset(0),
277 _code_offset(0),
278 _data_offset(0),
279 _code_begin(code_begin),
280 _code_end(code_end),
281 _content_begin(content_begin),
282 _content_end(content_end),
283 _data_end(data_end),
284 _relocation_begin(relocation_begin),
285 _relocation_end(relocation_end)
286 {
287 }
288
289 CodeBlobLayout(const address start, int size, int header_size, int relocation_size, int data_offset) :
290 _size(size),
291 _header_size(header_size),
292 _relocation_size(relocation_size),
293 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
294 _code_offset(_content_offset),
295 _data_offset(data_offset)
296 {
297 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
298
299 _code_begin = (address) start + _code_offset;
300 _code_end = (address) start + _data_offset;
301
302 _content_begin = (address) start + _content_offset;
303 _content_end = (address) start + _data_offset;
304
305 _data_end = (address) start + _size;
306 _relocation_begin = (address) start + _header_size;
307 _relocation_end = _relocation_begin + _relocation_size;
308 }
309
310 CodeBlobLayout(const address start, int size, int header_size, const CodeBuffer* cb) :
311 _size(size),
312 _header_size(header_size),
313 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
314 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
315 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
316 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize))
317 {
318 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
319
320 _code_begin = (address) start + _code_offset;
321 _code_end = (address) start + _data_offset;
322
323 _content_begin = (address) start + _content_offset;
324 _content_end = (address) start + _data_offset;
325
326 _data_end = (address) start + _size;
327 _relocation_begin = (address) start + _header_size;
328 _relocation_end = _relocation_begin + _relocation_size;
329 }
330
331 int size() const { return _size; }
332 int header_size() const { return _header_size; }
333 int relocation_size() const { return _relocation_size; }
334 int content_offset() const { return _content_offset; }
335 int code_offset() const { return _code_offset; }
336 int data_offset() const { return _data_offset; }
337 address code_begin() const { return _code_begin; }
338 address code_end() const { return _code_end; }
339 address data_end() const { return _data_end; }
340 address relocation_begin() const { return _relocation_begin; }
341 address relocation_end() const { return _relocation_end; }
342 address content_begin() const { return _content_begin; }
343 address content_end() const { return _content_end; }
344 };
345
346
347 class RuntimeBlob : public CodeBlob {
348 friend class VMStructs;
349 public:
350
351 // Creation
352 // a) simple CodeBlob
353 // frame_complete is the offset from the beginning of the instructions
354 // to where the frame setup (from stackwalk viewpoint) is complete.
355 RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size);
356
357 // b) full CodeBlob
358 RuntimeBlob(
359 const char* name,
360 CodeBuffer* cb,
361 int header_size,
362 int size,
363 int frame_complete,
364 int frame_size,
365 OopMapSet* oop_maps,
366 bool caller_must_gc_arguments = false
367 );
368
369 // GC support
370 virtual bool is_alive() const = 0;
371
372 void verify();
373
374 // OopMap for frame
375 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); }
376
377 // Debugging
378 void print() const { print_on(tty); }
379 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); }
380 virtual void print_value_on(outputStream* st) const { CodeBlob::print_value_on(st); }
381
382 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
383 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
384 };
385
386 class WhiteBox;
387 //----------------------------------------------------------------------------------------------------
388 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
389
390 class BufferBlob: public RuntimeBlob {
391 friend class VMStructs;
392 friend class AdapterBlob;
393 friend class VtableBlob;
394 friend class MethodHandlesAdapterBlob;
395 friend class BufferedValueTypeBlob;
396 friend class WhiteBox;
397
398 private:
399 // Creation support
400 BufferBlob(const char* name, int size);
401 BufferBlob(const char* name, int size, CodeBuffer* cb);
402 BufferBlob(const char* name, int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false);
403
404 // This ordinary operator delete is needed even though not used, so the
405 // below two-argument operator delete will be treated as a placement
406 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
407 void operator delete(void* p);
408 void* operator new(size_t s, unsigned size) throw();
409
410 public:
411 // Creation
412 static BufferBlob* create(const char* name, int buffer_size);
413 static BufferBlob* create(const char* name, CodeBuffer* cb);
414
415 static void free(BufferBlob* buf);
416
417 // Typing
418 virtual bool is_buffer_blob() const { return true; }
419
420 // GC/Verification support
421 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
422 bool is_alive() const { return true; }
423
424 void verify();
425 void print_on(outputStream* st) const;
426 void print_value_on(outputStream* st) const;
427 };
428
429
430 //----------------------------------------------------------------------------------------------------
431 // AdapterBlob: used to hold C2I/I2C adapters
432
433 class AdapterBlob: public BufferBlob {
434 private:
435 AdapterBlob(int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false);
436
437 public:
438 // Creation
439 static AdapterBlob* create(CodeBuffer* cb,
440 int frame_complete,
441 int frame_size,
442 OopMapSet* oop_maps,
443 bool caller_must_gc_arguments = false);
444
445 // Typing
446 virtual bool is_adapter_blob() const { return true; }
447
448 bool caller_must_gc_arguments(JavaThread* thread) const { return true; }
449 };
450
451 //---------------------------------------------------------------------------------------------------
452 class VtableBlob: public BufferBlob {
453 private:
454 VtableBlob(const char*, int);
455
456 public:
457 // Creation
458 static VtableBlob* create(const char* name, int buffer_size);
459
460 // Typing
461 virtual bool is_vtable_blob() const { return true; }
462 };
463
464 //----------------------------------------------------------------------------------------------------
465 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
466
467 class MethodHandlesAdapterBlob: public BufferBlob {
468 private:
469 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {}
470
471 public:
472 // Creation
473 static MethodHandlesAdapterBlob* create(int buffer_size);
474
475 // Typing
476 virtual bool is_method_handles_adapter_blob() const { return true; }
477 };
478
479 //----------------------------------------------------------------------------------------------------
480 // BufferedValueTypeBlob : used for pack/unpack handlers
481
482 class BufferedValueTypeBlob: public BufferBlob {
483 private:
484 const int _pack_fields_off;
485 const int _unpack_fields_off;
486
487 BufferedValueTypeBlob(int size, CodeBuffer* cb, int pack_fields_off, int unpack_fields_off);
488
489 public:
490 // Creation
491 static BufferedValueTypeBlob* create(CodeBuffer* cb, int pack_fields_off, int unpack_fields_off);
492
493 address pack_fields() const { return code_begin() + _pack_fields_off; }
494 address unpack_fields() const { return code_begin() + _unpack_fields_off; }
495
496 // Typing
497 virtual bool is_buffered_value_type_blob() const { return true; }
498 };
499
500 //----------------------------------------------------------------------------------------------------
501 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
502
503 class RuntimeStub: public RuntimeBlob {
504 friend class VMStructs;
505 private:
506 // Creation support
507 RuntimeStub(
508 const char* name,
509 CodeBuffer* cb,
510 int size,
511 int frame_complete,
512 int frame_size,
513 OopMapSet* oop_maps,
514 bool caller_must_gc_arguments
515 );
516
517 // This ordinary operator delete is needed even though not used, so the
518 // below two-argument operator delete will be treated as a placement
519 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
520 void operator delete(void* p);
521 void* operator new(size_t s, unsigned size) throw();
522
523 public:
524 // Creation
525 static RuntimeStub* new_runtime_stub(
526 const char* stub_name,
527 CodeBuffer* cb,
528 int frame_complete,
529 int frame_size,
530 OopMapSet* oop_maps,
531 bool caller_must_gc_arguments
532 );
533
534 // Typing
535 bool is_runtime_stub() const { return true; }
536
537 address entry_point() const { return code_begin(); }
538
539 // GC/Verification support
540 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
541 bool is_alive() const { return true; }
542
543 void verify();
544 void print_on(outputStream* st) const;
545 void print_value_on(outputStream* st) const;
546 };
547
548
549 //----------------------------------------------------------------------------------------------------
550 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
551
552 class SingletonBlob: public RuntimeBlob {
553 friend class VMStructs;
554
555 protected:
556 // This ordinary operator delete is needed even though not used, so the
557 // below two-argument operator delete will be treated as a placement
558 // delete rather than an ordinary sized delete; see C++14 3.7.4.2/p2.
559 void operator delete(void* p);
560 void* operator new(size_t s, unsigned size) throw();
561
562 public:
563 SingletonBlob(
564 const char* name,
565 CodeBuffer* cb,
566 int header_size,
567 int size,
568 int frame_size,
569 OopMapSet* oop_maps
570 )
571 : RuntimeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
572 {};
573
574 address entry_point() { return code_begin(); }
575
576 bool is_alive() const { return true; }
577
578 // GC/Verification support
579 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
580 void verify(); // does nothing
581 void print_on(outputStream* st) const;
582 void print_value_on(outputStream* st) const;
583 };
584
585
586 //----------------------------------------------------------------------------------------------------
587 // DeoptimizationBlob
588
589 class DeoptimizationBlob: public SingletonBlob {
590 friend class VMStructs;
591 friend class JVMCIVMStructs;
592 private:
593 int _unpack_offset;
594 int _unpack_with_exception;
595 int _unpack_with_reexecution;
596
597 int _unpack_with_exception_in_tls;
598
599 #if INCLUDE_JVMCI
600 // Offsets when JVMCI calls uncommon_trap.
601 int _uncommon_trap_offset;
602 int _implicit_exception_uncommon_trap_offset;
603 #endif
604
605 // Creation support
606 DeoptimizationBlob(
607 CodeBuffer* cb,
608 int size,
609 OopMapSet* oop_maps,
610 int unpack_offset,
611 int unpack_with_exception_offset,
612 int unpack_with_reexecution_offset,
613 int frame_size
614 );
615
616 public:
617 // Creation
618 static DeoptimizationBlob* create(
619 CodeBuffer* cb,
620 OopMapSet* oop_maps,
621 int unpack_offset,
622 int unpack_with_exception_offset,
623 int unpack_with_reexecution_offset,
624 int frame_size
625 );
626
627 // Typing
628 bool is_deoptimization_stub() const { return true; }
629 bool exception_address_is_unpack_entry(address pc) const {
630 address unpack_pc = unpack();
631 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);
632 }
633
634 // GC for args
635 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
636
637 // Printing
638 void print_value_on(outputStream* st) const;
639
640 address unpack() const { return code_begin() + _unpack_offset; }
641 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
642 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
643
644 // Alternate entry point for C1 where the exception and issuing pc
645 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
646 // instead of being in registers. This is needed because C1 doesn't
647 // model exception paths in a way that keeps these registers free so
648 // there may be live values in those registers during deopt.
649 void set_unpack_with_exception_in_tls_offset(int offset) {
650 _unpack_with_exception_in_tls = offset;
651 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
652 }
653 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
654
655 #if INCLUDE_JVMCI
656 // Offsets when JVMCI calls uncommon_trap.
657 void set_uncommon_trap_offset(int offset) {
658 _uncommon_trap_offset = offset;
659 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
660 }
661 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
662
663 void set_implicit_exception_uncommon_trap_offset(int offset) {
664 _implicit_exception_uncommon_trap_offset = offset;
665 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
666 }
667 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
668 #endif // INCLUDE_JVMCI
669 };
670
671
672 //----------------------------------------------------------------------------------------------------
673 // UncommonTrapBlob (currently only used by Compiler 2)
674
675 #ifdef COMPILER2
676
677 class UncommonTrapBlob: public SingletonBlob {
678 friend class VMStructs;
679 private:
680 // Creation support
681 UncommonTrapBlob(
682 CodeBuffer* cb,
683 int size,
684 OopMapSet* oop_maps,
685 int frame_size
686 );
687
688 public:
689 // Creation
690 static UncommonTrapBlob* create(
691 CodeBuffer* cb,
692 OopMapSet* oop_maps,
693 int frame_size
694 );
695
696 // GC for args
697 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
698
699 // Typing
700 bool is_uncommon_trap_stub() const { return true; }
701 };
702
703
704 //----------------------------------------------------------------------------------------------------
705 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
706
707 class ExceptionBlob: public SingletonBlob {
708 friend class VMStructs;
709 private:
710 // Creation support
711 ExceptionBlob(
712 CodeBuffer* cb,
713 int size,
714 OopMapSet* oop_maps,
715 int frame_size
716 );
717
718 public:
719 // Creation
720 static ExceptionBlob* create(
721 CodeBuffer* cb,
722 OopMapSet* oop_maps,
723 int frame_size
724 );
725
726 // GC for args
727 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
728
729 // Typing
730 bool is_exception_stub() const { return true; }
731 };
732 #endif // COMPILER2
733
734
735 //----------------------------------------------------------------------------------------------------
736 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
737
738 class SafepointBlob: public SingletonBlob {
739 friend class VMStructs;
740 private:
741 // Creation support
742 SafepointBlob(
743 CodeBuffer* cb,
744 int size,
745 OopMapSet* oop_maps,
746 int frame_size
747 );
748
749 public:
750 // Creation
751 static SafepointBlob* create(
752 CodeBuffer* cb,
753 OopMapSet* oop_maps,
754 int frame_size
755 );
756
757 // GC for args
758 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
759
760 // Typing
761 bool is_safepoint_stub() const { return true; }
762 };
763
764 #endif // SHARE_CODE_CODEBLOB_HPP