1 /*
2 * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_CODE_CODEBLOB_HPP
26 #define SHARE_VM_CODE_CODEBLOB_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "compiler/compilerDefinitions.hpp"
30 #include "compiler/oopMap.hpp"
31 #include "runtime/frame.hpp"
32 #include "runtime/handles.hpp"
33 #include "utilities/align.hpp"
34 #include "utilities/macros.hpp"
35
36 // CodeBlob Types
37 // Used in the CodeCache to assign CodeBlobs to different CodeHeaps
38 struct CodeBlobType {
39 enum {
40 MethodNonProfiled = 0, // Execution level 1 and 4 (non-profiled) nmethods (including native nmethods)
41 MethodProfiled = 1, // Execution level 2 and 3 (profiled) nmethods
42 NonNMethod = 2, // Non-nmethods like Buffers, Adapters and Runtime Stubs
43 All = 3, // All types (No code cache segmentation)
44 AOT = 4, // AOT methods
45 NumTypes = 5 // Number of CodeBlobTypes
46 };
47 };
48
49 // CodeBlob - superclass for all entries in the CodeCache.
50 //
51 // Subtypes are:
52 // CompiledMethod : Compiled Java methods (include method that calls to native code)
53 // nmethod : JIT Compiled Java methods
54 // AOTCompiledMethod : AOT Compiled Java methods - Not in the CodeCache!
55 // AOTCompiledMethod objects are allocated in the C-Heap, the code they
56 // point to is allocated in the AOTCodeHeap which is in the C-Heap as
57 // well (i.e. it's the memory where the shared library was loaded to)
58 // RuntimeBlob : Non-compiled method code; generated glue code
59 // BufferBlob : Used for non-relocatable code such as interpreter, stubroutines, etc.
60 // AdapterBlob : Used to hold C2I/I2C adapters
61 // VtableBlob : Used for holding vtable chunks
62 // MethodHandlesAdapterBlob : Used to hold MethodHandles adapters
63 // RuntimeStub : Call to VM runtime methods
64 // SingletonBlob : Super-class for all blobs that exist in only one instance
65 // DeoptimizationBlob : Used for deoptimization
66 // ExceptionBlob : Used for stack unrolling
67 // SafepointBlob : Used to handle illegal instruction exceptions
68 // UncommonTrapBlob : Used to handle uncommon traps
69 //
70 //
71 // Layout (all except AOTCompiledMethod) : continuous in the CodeCache
72 // - header
73 // - relocation
74 // - content space
75 // - instruction space
76 // - data space
77 //
78 // Layout (AOTCompiledMethod) : in the C-Heap
79 // - header -\
80 // ... |
81 // - code <-/
82
83
84 class CodeBlobLayout;
85
86 class CodeBlob {
87 friend class VMStructs;
88 friend class JVMCIVMStructs;
89 friend class CodeCacheDumper;
90
91 protected:
92
93 const CompilerType _type; // CompilerType
94 int _size; // total size of CodeBlob in bytes
95 int _header_size; // size of header (depends on subclass)
96 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have
97 // not finished setting up their frame. Beware of pc's in
98 // that range. There is a similar range(s) on returns
99 // which we don't detect.
100 int _data_offset; // offset to where data region begins
101 int _frame_size; // size of stack frame
102
103 address _code_begin;
104 address _code_end;
105 address _content_begin; // address to where content region begins (this includes consts, insts, stubs)
106 // address _content_end - not required, for all CodeBlobs _code_end == _content_end for now
107 address _data_end;
108 address _relocation_begin;
109 address _relocation_end;
110
111 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob
112 bool _caller_must_gc_arguments;
113 CodeStrings _strings;
114 const char* _name;
115 S390_ONLY(int _ctable_offset;)
116
117 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, int frame_complete_offset, int frame_size, ImmutableOopMapSet* oop_maps, bool caller_must_gc_arguments);
118 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, CodeBuffer* cb, int frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments);
119 public:
120 // Returns the space needed for CodeBlob
121 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
122 static unsigned int align_code_offset(int offset);
123
124 // Deletion
125 virtual void flush();
126
127 // Typing
128 virtual bool is_buffer_blob() const { return false; }
129 virtual bool is_nmethod() const { return false; }
130 virtual bool is_runtime_stub() const { return false; }
131 virtual bool is_deoptimization_stub() const { return false; }
132 virtual bool is_uncommon_trap_stub() const { return false; }
133 virtual bool is_exception_stub() const { return false; }
134 virtual bool is_safepoint_stub() const { return false; }
135 virtual bool is_adapter_blob() const { return false; }
136 virtual bool is_vtable_blob() const { return false; }
137 virtual bool is_method_handles_adapter_blob() const { return false; }
138 virtual bool is_aot() const { return false; }
139 virtual bool is_compiled() const { return false; }
140 virtual bool is_buffered_value_type_blob() const { return false; }
141
142 inline bool is_compiled_by_c1() const { return _type == compiler_c1; };
143 inline bool is_compiled_by_c2() const { return _type == compiler_c2; };
144 inline bool is_compiled_by_jvmci() const { return _type == compiler_jvmci; };
145 const char* compiler_name() const;
146
147 // Casting
148 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; }
149 nmethod* as_nmethod() { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
150 CompiledMethod* as_compiled_method_or_null() { return is_compiled() ? (CompiledMethod*) this : NULL; }
151 CompiledMethod* as_compiled_method() { assert(is_compiled(), "must be compiled"); return (CompiledMethod*) this; }
152 CodeBlob* as_codeblob_or_null() const { return (CodeBlob*) this; }
153
154 // Boundaries
155 address header_begin() const { return (address) this; }
156 relocInfo* relocation_begin() const { return (relocInfo*) _relocation_begin; };
157 relocInfo* relocation_end() const { return (relocInfo*) _relocation_end; }
158 address content_begin() const { return _content_begin; }
159 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
160 address code_begin() const { return _code_begin; }
161 address code_end() const { return _code_end; }
162 address data_end() const { return _data_end; }
163
164 // This field holds the beginning of the const section in the old code buffer.
165 // It is needed to fix relocations of pc-relative loads when resizing the
166 // the constant pool or moving it.
167 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
168 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
169
170 // Sizes
171 int size() const { return _size; }
172 int header_size() const { return _header_size; }
173 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); }
174 int content_size() const { return content_end() - content_begin(); }
175 int code_size() const { return code_end() - code_begin(); }
176 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed
177 void adjust_size(size_t used) {
178 _size = (int)used;
179 _data_offset = (int)used;
180 _code_end = (address)this + used;
181 _data_end = (address)this + used;
182 }
183
184 // Containment
185 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); }
186 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
187 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
188 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
189 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
190
191 // CodeCache support: really only used by the nmethods, but in order to get
192 // asserts and certain bookkeeping to work in the CodeCache they are defined
193 // virtual here.
194 virtual bool is_zombie() const { return false; }
195 virtual bool is_locked_by_vm() const { return false; }
196
197 virtual bool is_unloaded() const { return false; }
198 virtual bool is_not_entrant() const { return false; }
199
200 // GC support
201 virtual bool is_alive() const = 0;
202
203 // OopMap for frame
204 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
205 void set_oop_maps(OopMapSet* p);
206 const ImmutableOopMap* oop_map_for_return_address(address return_address);
207 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) = 0;
208
209 // Frame support
210 int frame_size() const { return _frame_size; }
211 void set_frame_size(int size) { _frame_size = size; }
212
213 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
214 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
215
216 // Naming
217 const char* name() const { return _name; }
218 void set_name(const char* name) { _name = name; }
219
220 // Debugging
221 virtual void verify() = 0;
222 virtual void print() const { print_on(tty); };
223 virtual void print_on(outputStream* st) const;
224 virtual void print_value_on(outputStream* st) const;
225 void print_code();
226
227 // Print the comment associated with offset on stream, if there is one
228 virtual void print_block_comment(outputStream* stream, address block_begin) const {
229 intptr_t offset = (intptr_t)(block_begin - code_begin());
230 _strings.print_block_comment(stream, offset);
231 }
232
233 // Transfer ownership of comments to this CodeBlob
234 void set_strings(CodeStrings& strings) {
235 assert(!is_aot(), "invalid on aot");
236 _strings.assign(strings);
237 }
238
239 static ByteSize name_field_offset() {
240 return byte_offset_of(CodeBlob, _name);
241 }
242
243 static ByteSize oop_maps_field_offset() {
244 return byte_offset_of(CodeBlob, _oop_maps);
245 }
246 };
247
248 class CodeBlobLayout : public StackObj {
249 private:
250 int _size;
251 int _header_size;
252 int _relocation_size;
253 int _content_offset;
254 int _code_offset;
255 int _data_offset;
256 address _code_begin;
257 address _code_end;
258 address _content_begin;
259 address _content_end;
260 address _data_end;
261 address _relocation_begin;
262 address _relocation_end;
263
264 public:
265 CodeBlobLayout(address code_begin, address code_end, address content_begin, address content_end, address data_end, address relocation_begin, address relocation_end) :
266 _size(0),
267 _header_size(0),
268 _relocation_size(0),
269 _content_offset(0),
270 _code_offset(0),
271 _data_offset(0),
272 _code_begin(code_begin),
273 _code_end(code_end),
274 _content_begin(content_begin),
275 _content_end(content_end),
276 _data_end(data_end),
277 _relocation_begin(relocation_begin),
278 _relocation_end(relocation_end)
279 {
280 }
281
282 CodeBlobLayout(const address start, int size, int header_size, int relocation_size, int data_offset) :
283 _size(size),
284 _header_size(header_size),
285 _relocation_size(relocation_size),
286 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
287 _code_offset(_content_offset),
288 _data_offset(data_offset)
289 {
290 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
291
292 _code_begin = (address) start + _code_offset;
293 _code_end = (address) start + _data_offset;
294
295 _content_begin = (address) start + _content_offset;
296 _content_end = (address) start + _data_offset;
297
298 _data_end = (address) start + _size;
299 _relocation_begin = (address) start + _header_size;
300 _relocation_end = _relocation_begin + _relocation_size;
301 }
302
303 CodeBlobLayout(const address start, int size, int header_size, const CodeBuffer* cb) :
304 _size(size),
305 _header_size(header_size),
306 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
307 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
308 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
309 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize))
310 {
311 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
312
313 _code_begin = (address) start + _code_offset;
314 _code_end = (address) start + _data_offset;
315
316 _content_begin = (address) start + _content_offset;
317 _content_end = (address) start + _data_offset;
318
319 _data_end = (address) start + _size;
320 _relocation_begin = (address) start + _header_size;
321 _relocation_end = _relocation_begin + _relocation_size;
322 }
323
324 int size() const { return _size; }
325 int header_size() const { return _header_size; }
326 int relocation_size() const { return _relocation_size; }
327 int content_offset() const { return _content_offset; }
328 int code_offset() const { return _code_offset; }
329 int data_offset() const { return _data_offset; }
330 address code_begin() const { return _code_begin; }
331 address code_end() const { return _code_end; }
332 address data_end() const { return _data_end; }
333 address relocation_begin() const { return _relocation_begin; }
334 address relocation_end() const { return _relocation_end; }
335 address content_begin() const { return _content_begin; }
336 address content_end() const { return _content_end; }
337 };
338
339
340 class RuntimeBlob : public CodeBlob {
341 friend class VMStructs;
342 public:
343
344 // Creation
345 // a) simple CodeBlob
346 // frame_complete is the offset from the beginning of the instructions
347 // to where the frame setup (from stackwalk viewpoint) is complete.
348 RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size);
349
350 // b) full CodeBlob
351 RuntimeBlob(
352 const char* name,
353 CodeBuffer* cb,
354 int header_size,
355 int size,
356 int frame_complete,
357 int frame_size,
358 OopMapSet* oop_maps,
359 bool caller_must_gc_arguments = false
360 );
361
362 // GC support
363 virtual bool is_alive() const = 0;
364
365 void verify();
366
367 // OopMap for frame
368 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); }
369
370 // Debugging
371 void print() const { print_on(tty); }
372 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); }
373 virtual void print_value_on(outputStream* st) const { CodeBlob::print_value_on(st); }
374
375 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
376 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
377 };
378
379 class WhiteBox;
380 //----------------------------------------------------------------------------------------------------
381 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
382
383 class BufferBlob: public RuntimeBlob {
384 friend class VMStructs;
385 friend class AdapterBlob;
386 friend class VtableBlob;
387 friend class MethodHandlesAdapterBlob;
388 friend class BufferedValueTypeBlob;
389 friend class WhiteBox;
390
391 private:
392 // Creation support
393 BufferBlob(const char* name, int size);
394 BufferBlob(const char* name, int size, CodeBuffer* cb);
395 BufferBlob(const char* name, int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false);
396
397 void* operator new(size_t s, unsigned size) throw();
398
399 public:
400 // Creation
401 static BufferBlob* create(const char* name, int buffer_size);
402 static BufferBlob* create(const char* name, CodeBuffer* cb);
403
404 static void free(BufferBlob* buf);
405
406 // Typing
407 virtual bool is_buffer_blob() const { return true; }
408
409 // GC/Verification support
410 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
411 bool is_alive() const { return true; }
412
413 void verify();
414 void print_on(outputStream* st) const;
415 void print_value_on(outputStream* st) const;
416 };
417
418
419 //----------------------------------------------------------------------------------------------------
420 // AdapterBlob: used to hold C2I/I2C adapters
421
422 class AdapterBlob: public BufferBlob {
423 private:
424 AdapterBlob(int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false);
425
426 public:
427 // Creation
428 static AdapterBlob* create(CodeBuffer* cb,
429 int frame_complete,
430 int frame_size,
431 OopMapSet* oop_maps,
432 bool caller_must_gc_arguments = false);
433
434 // Typing
435 virtual bool is_adapter_blob() const { return true; }
436
437 bool caller_must_gc_arguments(JavaThread* thread) const { return true; }
438 };
439
440 //---------------------------------------------------------------------------------------------------
441 class VtableBlob: public BufferBlob {
442 private:
443 VtableBlob(const char*, int);
444
445 public:
446 // Creation
447 static VtableBlob* create(const char* name, int buffer_size);
448
449 // Typing
450 virtual bool is_vtable_blob() const { return true; }
451 };
452
453 //----------------------------------------------------------------------------------------------------
454 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
455
456 class MethodHandlesAdapterBlob: public BufferBlob {
457 private:
458 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {}
459
460 public:
461 // Creation
462 static MethodHandlesAdapterBlob* create(int buffer_size);
463
464 // Typing
465 virtual bool is_method_handles_adapter_blob() const { return true; }
466 };
467
468 //----------------------------------------------------------------------------------------------------
469 // BufferedValueTypeBlob : used for pack/unpack handlers
470
471 class BufferedValueTypeBlob: public BufferBlob {
472 private:
473 const int _pack_fields_off;
474 const int _unpack_fields_off;
475
476 BufferedValueTypeBlob(int size, CodeBuffer* cb, int pack_fields_off, int unpack_fields_off);
477
478 public:
479 // Creation
480 static BufferedValueTypeBlob* create(CodeBuffer* cb, int pack_fields_off, int unpack_fields_off);
481
482 address pack_fields() const { return code_begin() + _pack_fields_off; }
483 address unpack_fields() const { return code_begin() + _unpack_fields_off; }
484
485 // Typing
486 virtual bool is_buffered_value_type_blob() const { return true; }
487 };
488
489 //----------------------------------------------------------------------------------------------------
490 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
491
492 class RuntimeStub: public RuntimeBlob {
493 friend class VMStructs;
494 private:
495 // Creation support
496 RuntimeStub(
497 const char* name,
498 CodeBuffer* cb,
499 int size,
500 int frame_complete,
501 int frame_size,
502 OopMapSet* oop_maps,
503 bool caller_must_gc_arguments
504 );
505
506 void* operator new(size_t s, unsigned size) throw();
507
508 public:
509 // Creation
510 static RuntimeStub* new_runtime_stub(
511 const char* stub_name,
512 CodeBuffer* cb,
513 int frame_complete,
514 int frame_size,
515 OopMapSet* oop_maps,
516 bool caller_must_gc_arguments
517 );
518
519 // Typing
520 bool is_runtime_stub() const { return true; }
521
522 address entry_point() const { return code_begin(); }
523
524 // GC/Verification support
525 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
526 bool is_alive() const { return true; }
527
528 void verify();
529 void print_on(outputStream* st) const;
530 void print_value_on(outputStream* st) const;
531 };
532
533
534 //----------------------------------------------------------------------------------------------------
535 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
536
537 class SingletonBlob: public RuntimeBlob {
538 friend class VMStructs;
539
540 protected:
541 void* operator new(size_t s, unsigned size) throw();
542
543 public:
544 SingletonBlob(
545 const char* name,
546 CodeBuffer* cb,
547 int header_size,
548 int size,
549 int frame_size,
550 OopMapSet* oop_maps
551 )
552 : RuntimeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
553 {};
554
555 address entry_point() { return code_begin(); }
556
557 bool is_alive() const { return true; }
558
559 // GC/Verification support
560 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
561 void verify(); // does nothing
562 void print_on(outputStream* st) const;
563 void print_value_on(outputStream* st) const;
564 };
565
566
567 //----------------------------------------------------------------------------------------------------
568 // DeoptimizationBlob
569
570 class DeoptimizationBlob: public SingletonBlob {
571 friend class VMStructs;
572 friend class JVMCIVMStructs;
573 private:
574 int _unpack_offset;
575 int _unpack_with_exception;
576 int _unpack_with_reexecution;
577
578 int _unpack_with_exception_in_tls;
579
580 #if INCLUDE_JVMCI
581 // Offsets when JVMCI calls uncommon_trap.
582 int _uncommon_trap_offset;
583 int _implicit_exception_uncommon_trap_offset;
584 #endif
585
586 // Creation support
587 DeoptimizationBlob(
588 CodeBuffer* cb,
589 int size,
590 OopMapSet* oop_maps,
591 int unpack_offset,
592 int unpack_with_exception_offset,
593 int unpack_with_reexecution_offset,
594 int frame_size
595 );
596
597 public:
598 // Creation
599 static DeoptimizationBlob* create(
600 CodeBuffer* cb,
601 OopMapSet* oop_maps,
602 int unpack_offset,
603 int unpack_with_exception_offset,
604 int unpack_with_reexecution_offset,
605 int frame_size
606 );
607
608 // Typing
609 bool is_deoptimization_stub() const { return true; }
610 bool exception_address_is_unpack_entry(address pc) const {
611 address unpack_pc = unpack();
612 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);
613 }
614
615 // GC for args
616 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
617
618 // Printing
619 void print_value_on(outputStream* st) const;
620
621 address unpack() const { return code_begin() + _unpack_offset; }
622 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
623 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
624
625 // Alternate entry point for C1 where the exception and issuing pc
626 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
627 // instead of being in registers. This is needed because C1 doesn't
628 // model exception paths in a way that keeps these registers free so
629 // there may be live values in those registers during deopt.
630 void set_unpack_with_exception_in_tls_offset(int offset) {
631 _unpack_with_exception_in_tls = offset;
632 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
633 }
634 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
635
636 #if INCLUDE_JVMCI
637 // Offsets when JVMCI calls uncommon_trap.
638 void set_uncommon_trap_offset(int offset) {
639 _uncommon_trap_offset = offset;
640 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
641 }
642 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
643
644 void set_implicit_exception_uncommon_trap_offset(int offset) {
645 _implicit_exception_uncommon_trap_offset = offset;
646 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
647 }
648 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
649 #endif // INCLUDE_JVMCI
650 };
651
652
653 //----------------------------------------------------------------------------------------------------
654 // UncommonTrapBlob (currently only used by Compiler 2)
655
656 #ifdef COMPILER2
657
658 class UncommonTrapBlob: public SingletonBlob {
659 friend class VMStructs;
660 private:
661 // Creation support
662 UncommonTrapBlob(
663 CodeBuffer* cb,
664 int size,
665 OopMapSet* oop_maps,
666 int frame_size
667 );
668
669 public:
670 // Creation
671 static UncommonTrapBlob* create(
672 CodeBuffer* cb,
673 OopMapSet* oop_maps,
674 int frame_size
675 );
676
677 // GC for args
678 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
679
680 // Typing
681 bool is_uncommon_trap_stub() const { return true; }
682 };
683
684
685 //----------------------------------------------------------------------------------------------------
686 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
687
688 class ExceptionBlob: public SingletonBlob {
689 friend class VMStructs;
690 private:
691 // Creation support
692 ExceptionBlob(
693 CodeBuffer* cb,
694 int size,
695 OopMapSet* oop_maps,
696 int frame_size
697 );
698
699 public:
700 // Creation
701 static ExceptionBlob* create(
702 CodeBuffer* cb,
703 OopMapSet* oop_maps,
704 int frame_size
705 );
706
707 // GC for args
708 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
709
710 // Typing
711 bool is_exception_stub() const { return true; }
712 };
713 #endif // COMPILER2
714
715
716 //----------------------------------------------------------------------------------------------------
717 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
718
719 class SafepointBlob: public SingletonBlob {
720 friend class VMStructs;
721 private:
722 // Creation support
723 SafepointBlob(
724 CodeBuffer* cb,
725 int size,
726 OopMapSet* oop_maps,
727 int frame_size
728 );
729
730 public:
731 // Creation
732 static SafepointBlob* create(
733 CodeBuffer* cb,
734 OopMapSet* oop_maps,
735 int frame_size
736 );
737
738 // GC for args
739 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
740
741 // Typing
742 bool is_safepoint_stub() const { return true; }
743 };
744
745 #endif // SHARE_VM_CODE_CODEBLOB_HPP