1 /*
2 * Copyright (c) 1998, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_CODE_CODEBLOB_HPP
26 #define SHARE_CODE_CODEBLOB_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "compiler/compilerDefinitions.hpp"
30 #include "compiler/oopMap.hpp"
31 #include "runtime/javaFrameAnchor.hpp"
32 #include "runtime/frame.hpp"
33 #include "runtime/handles.hpp"
34 #include "utilities/align.hpp"
35 #include "utilities/macros.hpp"
36
37 class ImmutableOopMap;
38 class ImmutableOopMapSet;
39 class JNIHandleBlock;
40 class OopMapSet;
41
42 // CodeBlob Types
43 // Used in the CodeCache to assign CodeBlobs to different CodeHeaps
44 enum class CodeBlobType {
45 MethodNonProfiled = 0, // Execution level 1 and 4 (non-profiled) nmethods (including native nmethods)
46 MethodProfiled = 1, // Execution level 2 and 3 (profiled) nmethods
47 NonNMethod = 2, // Non-nmethods like Buffers, Adapters and Runtime Stubs
48 All = 3, // All types (No code cache segmentation)
49 NumTypes = 4 // Number of CodeBlobTypes
50 };
51
52 // CodeBlob - superclass for all entries in the CodeCache.
53 //
54 // Subtypes are:
55 // CompiledMethod : Compiled Java methods (include method that calls to native code)
56 // nmethod : JIT Compiled Java methods
57 // RuntimeBlob : Non-compiled method code; generated glue code
58 // BufferBlob : Used for non-relocatable code such as interpreter, stubroutines, etc.
59 // AdapterBlob : Used to hold C2I/I2C adapters
60 // VtableBlob : Used for holding vtable chunks
61 // MethodHandlesAdapterBlob : Used to hold MethodHandles adapters
62 // RuntimeStub : Call to VM runtime methods
63 // SingletonBlob : Super-class for all blobs that exist in only one instance
64 // DeoptimizationBlob : Used for deoptimization
65 // ExceptionBlob : Used for stack unrolling
66 // SafepointBlob : Used to handle illegal instruction exceptions
67 // UncommonTrapBlob : Used to handle uncommon traps
68 // UpcallStub : Used for upcalls from native code
69 //
70 //
71 // Layout : continuous in the CodeCache
72 // - header
73 // - relocation
74 // - content space
75 // - instruction space
76 // - data space
77
78
79 class CodeBlobLayout;
80 class UpcallStub; // for as_upcall_stub()
81 class RuntimeStub; // for as_runtime_stub()
82 class JavaFrameAnchor; // for UpcallStub::jfa_for_frame
83
84 class CodeBlob {
85 friend class VMStructs;
86 friend class JVMCIVMStructs;
87 friend class CodeCacheDumper;
88
89 protected:
90
91 // order fields from large to small to minimize padding between fields
92 address _code_begin;
93 address _code_end;
94 address _content_begin; // address to where content region begins (this includes consts, insts, stubs)
95 // address _content_end - not required, for all CodeBlobs _code_end == _content_end for now
96 address _data_end;
97 address _relocation_begin;
98 address _relocation_end;
99
100 ImmutableOopMapSet* _oop_maps; // OopMap for this CodeBlob
101
102 const char* _name;
103 S390_ONLY(int _ctable_offset;)
104
105 int _size; // total size of CodeBlob in bytes
106 int _header_size; // size of header (depends on subclass)
107 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have
108 // not finished setting up their frame. Beware of pc's in
109 // that range. There is a similar range(s) on returns
110 // which we don't detect.
111 int _data_offset; // offset to where data region begins
112 int _frame_size; // size of stack frame in words (NOT slots. On x64 these are 64bit words)
113
114 bool _caller_must_gc_arguments;
115
116 bool _is_compiled;
117 const CompilerType _type; // CompilerType
118
119 #ifndef PRODUCT
120 AsmRemarks _asm_remarks;
121 DbgStrings _dbg_strings;
122 #endif // not PRODUCT
123
124 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, int frame_complete_offset,
125 int frame_size, ImmutableOopMapSet* oop_maps,
126 bool caller_must_gc_arguments, bool compiled = false);
127 CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, CodeBuffer* cb, int frame_complete_offset,
128 int frame_size, OopMapSet* oop_maps,
129 bool caller_must_gc_arguments, bool compiled = false);
130
131 void operator delete(void* p) { }
132
133 public:
134 // Only used by unit test.
135 CodeBlob() : _type(compiler_none) {}
136
137 virtual ~CodeBlob() {
138 assert(_oop_maps == nullptr, "Not flushed");
139 }
140
141 // Returns the space needed for CodeBlob
142 static unsigned int allocation_size(CodeBuffer* cb, int header_size);
143 static unsigned int align_code_offset(int offset);
144
145 // Deletion
146 virtual void purge(bool free_code_cache_data = true);
147
148 // Typing
149 virtual bool is_buffer_blob() const { return false; }
150 virtual bool is_nmethod() const { return false; }
151 virtual bool is_runtime_stub() const { return false; }
152 virtual bool is_deoptimization_stub() const { return false; }
153 virtual bool is_uncommon_trap_stub() const { return false; }
154 virtual bool is_exception_stub() const { return false; }
155 virtual bool is_safepoint_stub() const { return false; }
156 virtual bool is_adapter_blob() const { return false; }
157 virtual bool is_vtable_blob() const { return false; }
158 virtual bool is_method_handles_adapter_blob() const { return false; }
159 virtual bool is_upcall_stub() const { return false; }
160 bool is_compiled() const { return _is_compiled; }
161 const bool* is_compiled_addr() const { return &_is_compiled; }
162 virtual bool is_buffered_inline_type_blob() const { return false; }
163
164 inline bool is_compiled_by_c1() const { return _type == compiler_c1; };
165 inline bool is_compiled_by_c2() const { return _type == compiler_c2; };
166 inline bool is_compiled_by_jvmci() const { return _type == compiler_jvmci; };
167 const char* compiler_name() const;
168 CompilerType compiler_type() const { return _type; }
169
170 // Casting
171 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : nullptr; }
172 nmethod* as_nmethod() { assert(is_nmethod(), "must be nmethod"); return (nmethod*) this; }
173 CompiledMethod* as_compiled_method_or_null() { return is_compiled() ? (CompiledMethod*) this : nullptr; }
174 CompiledMethod* as_compiled_method() { assert(is_compiled(), "must be compiled"); return (CompiledMethod*) this; }
175 CodeBlob* as_codeblob_or_null() const { return (CodeBlob*) this; }
176 UpcallStub* as_upcall_stub() const { assert(is_upcall_stub(), "must be upcall stub"); return (UpcallStub*) this; }
177 RuntimeStub* as_runtime_stub() const { assert(is_runtime_stub(), "must be runtime blob"); return (RuntimeStub*) this; }
178
179 // Boundaries
180 address header_begin() const { return (address) this; }
181 relocInfo* relocation_begin() const { return (relocInfo*) _relocation_begin; };
182 relocInfo* relocation_end() const { return (relocInfo*) _relocation_end; }
183 address content_begin() const { return _content_begin; }
184 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
185 address code_begin() const { return _code_begin; }
186 address code_end() const { return _code_end; }
187 address data_end() const { return _data_end; }
188
189 // This field holds the beginning of the const section in the old code buffer.
190 // It is needed to fix relocations of pc-relative loads when resizing the
191 // the constant pool or moving it.
192 S390_ONLY(address ctable_begin() const { return header_begin() + _ctable_offset; })
193 void set_ctable_begin(address ctable) { S390_ONLY(_ctable_offset = ctable - header_begin();) }
194
195 // Sizes
196 int size() const { return _size; }
197 int header_size() const { return _header_size; }
198 int relocation_size() const { return pointer_delta_as_int((address) relocation_end(), (address) relocation_begin()); }
199 int content_size() const { return pointer_delta_as_int(content_end(), content_begin()); }
200 int code_size() const { return pointer_delta_as_int(code_end(), code_begin()); }
201 // Only used from CodeCache::free_unused_tail() after the Interpreter blob was trimmed
202 void adjust_size(size_t used) {
203 _size = (int)used;
204 _data_offset = (int)used;
205 _code_end = (address)this + used;
206 _data_end = (address)this + used;
207 }
208
209 // Containment
210 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); }
211 bool code_contains(address addr) const { return code_begin() <= addr && addr < code_end(); }
212 bool contains(address addr) const { return content_begin() <= addr && addr < content_end(); }
213 bool is_frame_complete_at(address addr) const { return _frame_complete_offset != CodeOffsets::frame_never_safe &&
214 code_contains(addr) && addr >= code_begin() + _frame_complete_offset; }
215 int frame_complete_offset() const { return _frame_complete_offset; }
216
217 virtual bool is_not_entrant() const { return false; }
218
219 // OopMap for frame
220 ImmutableOopMapSet* oop_maps() const { return _oop_maps; }
221 void set_oop_maps(OopMapSet* p);
222
223 const ImmutableOopMap* oop_map_for_slot(int slot, address return_address) const;
224 const ImmutableOopMap* oop_map_for_return_address(address return_address) const;
225 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) = 0;
226
227 // Frame support. Sizes are in word units.
228 int frame_size() const { return _frame_size; }
229 void set_frame_size(int size) { _frame_size = size; }
230
231 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
232 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; }
233
234 // Naming
235 const char* name() const { return _name; }
236 void set_name(const char* name) { _name = name; }
237
238 // Debugging
239 virtual void verify() = 0;
240 virtual void print() const;
241 virtual void print_on(outputStream* st) const;
242 virtual void print_value_on(outputStream* st) const;
243 void dump_for_addr(address addr, outputStream* st, bool verbose) const;
244 void print_code();
245
246 // Print to stream, any comments associated with offset.
247 virtual void print_block_comment(outputStream* stream, address block_begin) const {
248 #ifndef PRODUCT
249 ptrdiff_t offset = block_begin - code_begin();
250 assert(offset >= 0, "Expecting non-negative offset!");
251 _asm_remarks.print(uint(offset), stream);
252 #endif
253 }
254
255 #ifndef PRODUCT
256 AsmRemarks &asm_remarks() { return _asm_remarks; }
257 DbgStrings &dbg_strings() { return _dbg_strings; }
258
259 void use_remarks(AsmRemarks &remarks) { _asm_remarks.share(remarks); }
260 void use_strings(DbgStrings &strings) { _dbg_strings.share(strings); }
261 #endif
262 };
263
264 class CodeBlobLayout : public StackObj {
265 private:
266 int _size;
267 int _header_size;
268 int _relocation_size;
269 int _content_offset;
270 int _code_offset;
271 int _data_offset;
272 address _code_begin;
273 address _code_end;
274 address _content_begin;
275 address _content_end;
276 address _data_end;
277 address _relocation_begin;
278 address _relocation_end;
279
280 public:
281 CodeBlobLayout(address code_begin, address code_end, address content_begin, address content_end, address data_end, address relocation_begin, address relocation_end) :
282 _size(0),
283 _header_size(0),
284 _relocation_size(0),
285 _content_offset(0),
286 _code_offset(0),
287 _data_offset(0),
288 _code_begin(code_begin),
289 _code_end(code_end),
290 _content_begin(content_begin),
291 _content_end(content_end),
292 _data_end(data_end),
293 _relocation_begin(relocation_begin),
294 _relocation_end(relocation_end)
295 {
296 }
297
298 CodeBlobLayout(const address start, int size, int header_size, int relocation_size, int data_offset) :
299 _size(size),
300 _header_size(header_size),
301 _relocation_size(relocation_size),
302 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
303 _code_offset(_content_offset),
304 _data_offset(data_offset)
305 {
306 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
307
308 _code_begin = (address) start + _code_offset;
309 _code_end = (address) start + _data_offset;
310
311 _content_begin = (address) start + _content_offset;
312 _content_end = (address) start + _data_offset;
313
314 _data_end = (address) start + _size;
315 _relocation_begin = (address) start + _header_size;
316 _relocation_end = _relocation_begin + _relocation_size;
317 }
318
319 CodeBlobLayout(const address start, int size, int header_size, const CodeBuffer* cb) :
320 _size(size),
321 _header_size(header_size),
322 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
323 _content_offset(CodeBlob::align_code_offset(_header_size + _relocation_size)),
324 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
325 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize))
326 {
327 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
328
329 _code_begin = (address) start + _code_offset;
330 _code_end = (address) start + _data_offset;
331
332 _content_begin = (address) start + _content_offset;
333 _content_end = (address) start + _data_offset;
334
335 _data_end = (address) start + _size;
336 _relocation_begin = (address) start + _header_size;
337 _relocation_end = _relocation_begin + _relocation_size;
338 }
339
340 int size() const { return _size; }
341 int header_size() const { return _header_size; }
342 int relocation_size() const { return _relocation_size; }
343 int content_offset() const { return _content_offset; }
344 int code_offset() const { return _code_offset; }
345 int data_offset() const { return _data_offset; }
346 address code_begin() const { return _code_begin; }
347 address code_end() const { return _code_end; }
348 address data_end() const { return _data_end; }
349 address relocation_begin() const { return _relocation_begin; }
350 address relocation_end() const { return _relocation_end; }
351 address content_begin() const { return _content_begin; }
352 address content_end() const { return _content_end; }
353 };
354
355
356 class RuntimeBlob : public CodeBlob {
357 friend class VMStructs;
358 public:
359
360 // Creation
361 // a) simple CodeBlob
362 // frame_complete is the offset from the beginning of the instructions
363 // to where the frame setup (from stackwalk viewpoint) is complete.
364 RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size);
365
366 // b) full CodeBlob
367 RuntimeBlob(
368 const char* name,
369 CodeBuffer* cb,
370 int header_size,
371 int size,
372 int frame_complete,
373 int frame_size,
374 OopMapSet* oop_maps,
375 bool caller_must_gc_arguments = false
376 );
377
378 static void free(RuntimeBlob* blob);
379
380 void verify();
381
382 // OopMap for frame
383 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); }
384
385 // Debugging
386 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); }
387 virtual void print_value_on(outputStream* st) const { CodeBlob::print_value_on(st); }
388
389 // Deal with Disassembler, VTune, Forte, JvmtiExport, MemoryService.
390 static void trace_new_stub(RuntimeBlob* blob, const char* name1, const char* name2 = "");
391 };
392
393 class WhiteBox;
394 //----------------------------------------------------------------------------------------------------
395 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc.
396
397 class BufferBlob: public RuntimeBlob {
398 friend class VMStructs;
399 friend class AdapterBlob;
400 friend class VtableBlob;
401 friend class MethodHandlesAdapterBlob;
402 friend class BufferedInlineTypeBlob;
403 friend class UpcallStub;
404 friend class WhiteBox;
405
406 private:
407 // Creation support
408 BufferBlob(const char* name, int size);
409 BufferBlob(const char* name, int header_size, int size, CodeBuffer* cb);
410 BufferBlob(const char* name, int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false);
411
412 void* operator new(size_t s, unsigned size) throw();
413
414 public:
415 // Creation
416 static BufferBlob* create(const char* name, uint buffer_size);
417 static BufferBlob* create(const char* name, CodeBuffer* cb);
418
419 static void free(BufferBlob* buf);
420
421 // Typing
422 virtual bool is_buffer_blob() const { return true; }
423
424 // GC/Verification support
425 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
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, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments = false);
439
440 public:
441 // Creation
442 static AdapterBlob* create(CodeBuffer* cb,
443 int frame_complete,
444 int frame_size,
445 OopMapSet* oop_maps,
446 bool caller_must_gc_arguments = false);
447
448 // Typing
449 virtual bool is_adapter_blob() const { return true; }
450
451 bool caller_must_gc_arguments(JavaThread* thread) const { return true; }
452 };
453
454 //---------------------------------------------------------------------------------------------------
455 class VtableBlob: public BufferBlob {
456 private:
457 VtableBlob(const char*, int);
458
459 void* operator new(size_t s, unsigned size) throw();
460
461 public:
462 // Creation
463 static VtableBlob* create(const char* name, int buffer_size);
464
465 // Typing
466 virtual bool is_vtable_blob() const { return true; }
467 };
468
469 //----------------------------------------------------------------------------------------------------
470 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
471
472 class MethodHandlesAdapterBlob: public BufferBlob {
473 private:
474 MethodHandlesAdapterBlob(int size): BufferBlob("MethodHandles adapters", size) {}
475
476 public:
477 // Creation
478 static MethodHandlesAdapterBlob* create(int buffer_size);
479
480 // Typing
481 virtual bool is_method_handles_adapter_blob() const { return true; }
482 };
483
484 //----------------------------------------------------------------------------------------------------
485 // BufferedInlineTypeBlob : used for pack/unpack handlers
486
487 class BufferedInlineTypeBlob: public BufferBlob {
488 private:
489 const int _pack_fields_off;
490 const int _pack_fields_jobject_off;
491 const int _unpack_fields_off;
492
493 BufferedInlineTypeBlob(int size, CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off);
494
495 public:
496 // Creation
497 static BufferedInlineTypeBlob* create(CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off);
498
499 address pack_fields() const { return code_begin() + _pack_fields_off; }
500 address pack_fields_jobject() const { return code_begin() + _pack_fields_jobject_off; }
501 address unpack_fields() const { return code_begin() + _unpack_fields_off; }
502
503 // Typing
504 virtual bool is_buffered_inline_type_blob() const { return true; }
505 };
506
507 //----------------------------------------------------------------------------------------------------
508 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine
509
510 class RuntimeStub: public RuntimeBlob {
511 friend class VMStructs;
512 private:
513 // Creation support
514 RuntimeStub(
515 const char* name,
516 CodeBuffer* cb,
517 int size,
518 int frame_complete,
519 int frame_size,
520 OopMapSet* oop_maps,
521 bool caller_must_gc_arguments
522 );
523
524 void* operator new(size_t s, unsigned size) throw();
525
526 public:
527 // Creation
528 static RuntimeStub* new_runtime_stub(
529 const char* stub_name,
530 CodeBuffer* cb,
531 int frame_complete,
532 int frame_size,
533 OopMapSet* oop_maps,
534 bool caller_must_gc_arguments,
535 bool alloc_fail_is_fatal=true
536 );
537
538 static void free(RuntimeStub* stub) { RuntimeBlob::free(stub); }
539
540 // Typing
541 bool is_runtime_stub() const { return true; }
542
543 address entry_point() const { return code_begin(); }
544
545 // GC/Verification support
546 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
547
548 void verify();
549 void print_on(outputStream* st) const;
550 void print_value_on(outputStream* st) const;
551 };
552
553
554 //----------------------------------------------------------------------------------------------------
555 // Super-class for all blobs that exist in only one instance. Implements default behaviour.
556
557 class SingletonBlob: public RuntimeBlob {
558 friend class VMStructs;
559
560 protected:
561 void* operator new(size_t s, unsigned size) throw();
562
563 public:
564 SingletonBlob(
565 const char* name,
566 CodeBuffer* cb,
567 int header_size,
568 int size,
569 int frame_size,
570 OopMapSet* oop_maps
571 )
572 : RuntimeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps)
573 {};
574
575 address entry_point() { return code_begin(); }
576
577 // GC/Verification support
578 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
579 void verify(); // does nothing
580 void print_on(outputStream* st) const;
581 void print_value_on(outputStream* st) const;
582 };
583
584
585 //----------------------------------------------------------------------------------------------------
586 // DeoptimizationBlob
587
588 class DeoptimizationBlob: public SingletonBlob {
589 friend class VMStructs;
590 friend class JVMCIVMStructs;
591 private:
592 int _unpack_offset;
593 int _unpack_with_exception;
594 int _unpack_with_reexecution;
595
596 int _unpack_with_exception_in_tls;
597
598 #if INCLUDE_JVMCI
599 // Offsets when JVMCI calls uncommon_trap.
600 int _uncommon_trap_offset;
601 int _implicit_exception_uncommon_trap_offset;
602 #endif
603
604 // Creation support
605 DeoptimizationBlob(
606 CodeBuffer* cb,
607 int size,
608 OopMapSet* oop_maps,
609 int unpack_offset,
610 int unpack_with_exception_offset,
611 int unpack_with_reexecution_offset,
612 int frame_size
613 );
614
615 public:
616 // Creation
617 static DeoptimizationBlob* create(
618 CodeBuffer* cb,
619 OopMapSet* oop_maps,
620 int unpack_offset,
621 int unpack_with_exception_offset,
622 int unpack_with_reexecution_offset,
623 int frame_size
624 );
625
626 // Typing
627 bool is_deoptimization_stub() const { return true; }
628
629 // GC for args
630 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
631
632 // Printing
633 void print_value_on(outputStream* st) const;
634
635 address unpack() const { return code_begin() + _unpack_offset; }
636 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
637 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
638
639 // Alternate entry point for C1 where the exception and issuing pc
640 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
641 // instead of being in registers. This is needed because C1 doesn't
642 // model exception paths in a way that keeps these registers free so
643 // there may be live values in those registers during deopt.
644 void set_unpack_with_exception_in_tls_offset(int offset) {
645 _unpack_with_exception_in_tls = offset;
646 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
647 }
648 address unpack_with_exception_in_tls() const { return code_begin() + _unpack_with_exception_in_tls; }
649
650 #if INCLUDE_JVMCI
651 // Offsets when JVMCI calls uncommon_trap.
652 void set_uncommon_trap_offset(int offset) {
653 _uncommon_trap_offset = offset;
654 assert(contains(code_begin() + _uncommon_trap_offset), "must be PC inside codeblob");
655 }
656 address uncommon_trap() const { return code_begin() + _uncommon_trap_offset; }
657
658 void set_implicit_exception_uncommon_trap_offset(int offset) {
659 _implicit_exception_uncommon_trap_offset = offset;
660 assert(contains(code_begin() + _implicit_exception_uncommon_trap_offset), "must be PC inside codeblob");
661 }
662 address implicit_exception_uncommon_trap() const { return code_begin() + _implicit_exception_uncommon_trap_offset; }
663 #endif // INCLUDE_JVMCI
664 };
665
666
667 //----------------------------------------------------------------------------------------------------
668 // UncommonTrapBlob (currently only used by Compiler 2)
669
670 #ifdef COMPILER2
671
672 class UncommonTrapBlob: public SingletonBlob {
673 friend class VMStructs;
674 private:
675 // Creation support
676 UncommonTrapBlob(
677 CodeBuffer* cb,
678 int size,
679 OopMapSet* oop_maps,
680 int frame_size
681 );
682
683 public:
684 // Creation
685 static UncommonTrapBlob* create(
686 CodeBuffer* cb,
687 OopMapSet* oop_maps,
688 int frame_size
689 );
690
691 // GC for args
692 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ }
693
694 // Typing
695 bool is_uncommon_trap_stub() const { return true; }
696 };
697
698
699 //----------------------------------------------------------------------------------------------------
700 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
701
702 class ExceptionBlob: public SingletonBlob {
703 friend class VMStructs;
704 private:
705 // Creation support
706 ExceptionBlob(
707 CodeBuffer* cb,
708 int size,
709 OopMapSet* oop_maps,
710 int frame_size
711 );
712
713 public:
714 // Creation
715 static ExceptionBlob* create(
716 CodeBuffer* cb,
717 OopMapSet* oop_maps,
718 int frame_size
719 );
720
721 // GC for args
722 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
723
724 // Typing
725 bool is_exception_stub() const { return true; }
726 };
727 #endif // COMPILER2
728
729
730 //----------------------------------------------------------------------------------------------------
731 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
732
733 class SafepointBlob: public SingletonBlob {
734 friend class VMStructs;
735 private:
736 // Creation support
737 SafepointBlob(
738 CodeBuffer* cb,
739 int size,
740 OopMapSet* oop_maps,
741 int frame_size
742 );
743
744 public:
745 // Creation
746 static SafepointBlob* create(
747 CodeBuffer* cb,
748 OopMapSet* oop_maps,
749 int frame_size
750 );
751
752 // GC for args
753 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ }
754
755 // Typing
756 bool is_safepoint_stub() const { return true; }
757 };
758
759 //----------------------------------------------------------------------------------------------------
760
761 class UpcallLinker;
762
763 // A (Panama) upcall stub. Not used by JNI.
764 class UpcallStub: public RuntimeBlob {
765 friend class UpcallLinker;
766 private:
767 jobject _receiver;
768 ByteSize _frame_data_offset;
769
770 UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset);
771
772 void* operator new(size_t s, unsigned size) throw();
773
774 struct FrameData {
775 JavaFrameAnchor jfa;
776 JavaThread* thread;
777 JNIHandleBlock* old_handles;
778 JNIHandleBlock* new_handles;
779 };
780
781 // defined in frame_ARCH.cpp
782 FrameData* frame_data_for_frame(const frame& frame) const;
783 public:
784 // Creation
785 static UpcallStub* create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset);
786
787 static void free(UpcallStub* blob);
788
789 jobject receiver() { return _receiver; }
790
791 JavaFrameAnchor* jfa_for_frame(const frame& frame) const;
792
793 // Typing
794 virtual bool is_upcall_stub() const override { return true; }
795
796 // GC/Verification support
797 void oops_do(OopClosure* f, const frame& frame);
798 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) override;
799 virtual void verify() override;
800
801 // Misc.
802 virtual void print_on(outputStream* st) const override;
803 virtual void print_value_on(outputStream* st) const override;
804 };
805
806 #endif // SHARE_CODE_CODEBLOB_HPP