1 /*
2 * Copyright (c) 1997, 2014, 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_ASM_CODEBUFFER_HPP
26 #define SHARE_VM_ASM_CODEBUFFER_HPP
27
28 #include "code/oopRecorder.hpp"
29 #include "code/relocInfo.hpp"
30 #include "utilities/debug.hpp"
31
32 class CodeStrings;
33 class PhaseCFG;
34 class Compile;
35 class BufferBlob;
36 class CodeBuffer;
37 class Label;
38
39 class CodeOffsets: public StackObj {
40 public:
41 enum Entries { Entry,
42 Verified_Entry,
43 Frame_Complete, // Offset in the code where the frame setup is (for forte stackwalks) is complete
44 OSR_Entry,
45 Dtrace_trap = OSR_Entry, // dtrace probes can never have an OSR entry so reuse it
46 Exceptions, // Offset where exception handler lives
47 Deopt, // Offset where deopt handler lives
48 DeoptMH, // Offset where MethodHandle deopt handler lives
49 UnwindHandler, // Offset to default unwind handler
50 max_Entries };
51
52 // special value to note codeBlobs where profile (forte) stack walking is
53 // always dangerous and suspect.
54
55 enum { frame_never_safe = -1 };
56
57 private:
58 int _values[max_Entries];
59
60 public:
61 CodeOffsets() {
62 _values[Entry ] = 0;
63 _values[Verified_Entry] = 0;
64 _values[Frame_Complete] = frame_never_safe;
65 _values[OSR_Entry ] = 0;
66 _values[Exceptions ] = -1;
67 _values[Deopt ] = -1;
68 _values[DeoptMH ] = -1;
69 _values[UnwindHandler ] = -1;
70 }
71
72 int value(Entries e) { return _values[e]; }
73 void set_value(Entries e, int val) { _values[e] = val; }
74 };
75
76 // This class represents a stream of code and associated relocations.
77 // There are a few in each CodeBuffer.
78 // They are filled concurrently, and concatenated at the end.
79 class CodeSection VALUE_OBJ_CLASS_SPEC {
80 friend class CodeBuffer;
81 public:
82 typedef int csize_t; // code size type; would be size_t except for history
83
84 private:
85 address _start; // first byte of contents (instructions)
86 address _mark; // user mark, usually an instruction beginning
87 address _end; // current end address
88 address _limit; // last possible (allocated) end address
89 relocInfo* _locs_start; // first byte of relocation information
90 relocInfo* _locs_end; // first byte after relocation information
91 relocInfo* _locs_limit; // first byte after relocation information buf
92 address _locs_point; // last relocated position (grows upward)
93 bool _locs_own; // did I allocate the locs myself?
94 bool _frozen; // no more expansion of this section
95 char _index; // my section number (SECT_INST, etc.)
96 CodeBuffer* _outer; // enclosing CodeBuffer
97
98 // (Note: _locs_point used to be called _last_reloc_offset.)
99
100 CodeSection() {
101 _start = NULL;
102 _mark = NULL;
103 _end = NULL;
104 _limit = NULL;
105 _locs_start = NULL;
106 _locs_end = NULL;
107 _locs_limit = NULL;
108 _locs_point = NULL;
109 _locs_own = false;
110 _frozen = false;
111 debug_only(_index = (char)-1);
112 debug_only(_outer = (CodeBuffer*)badAddress);
113 }
114
115 void initialize_outer(CodeBuffer* outer, int index) {
116 _outer = outer;
117 _index = index;
118 }
119
120 void initialize(address start, csize_t size = 0) {
121 assert(_start == NULL, "only one init step, please");
122 _start = start;
123 _mark = NULL;
124 _end = start;
125
126 _limit = start + size;
127 _locs_point = start;
128 }
129
130 void initialize_locs(int locs_capacity);
131 void expand_locs(int new_capacity);
132 void initialize_locs_from(const CodeSection* source_cs);
133
134 // helper for CodeBuffer::expand()
135 void take_over_code_from(CodeSection* cs) {
136 _start = cs->_start;
137 _mark = cs->_mark;
138 _end = cs->_end;
139 _limit = cs->_limit;
140 _locs_point = cs->_locs_point;
141 }
142
143 public:
144 address start() const { return _start; }
145 address mark() const { return _mark; }
146 address end() const { return _end; }
147 address limit() const { return _limit; }
148 csize_t size() const { return (csize_t)(_end - _start); }
149 csize_t mark_off() const { assert(_mark != NULL, "not an offset");
150 return (csize_t)(_mark - _start); }
151 csize_t capacity() const { return (csize_t)(_limit - _start); }
152 csize_t remaining() const { return (csize_t)(_limit - _end); }
153
154 relocInfo* locs_start() const { return _locs_start; }
155 relocInfo* locs_end() const { return _locs_end; }
156 int locs_count() const { return (int)(_locs_end - _locs_start); }
157 relocInfo* locs_limit() const { return _locs_limit; }
158 address locs_point() const { return _locs_point; }
159 csize_t locs_point_off() const{ return (csize_t)(_locs_point - _start); }
160 csize_t locs_capacity() const { return (csize_t)(_locs_limit - _locs_start); }
161 csize_t locs_remaining()const { return (csize_t)(_locs_limit - _locs_end); }
162
163 int index() const { return _index; }
164 bool is_allocated() const { return _start != NULL; }
165 bool is_empty() const { return _start == _end; }
166 bool is_frozen() const { return _frozen; }
167 bool has_locs() const { return _locs_end != NULL; }
168
169 CodeBuffer* outer() const { return _outer; }
170
171 // is a given address in this section? (2nd version is end-inclusive)
172 bool contains(address pc) const { return pc >= _start && pc < _end; }
173 bool contains2(address pc) const { return pc >= _start && pc <= _end; }
174 bool allocates(address pc) const { return pc >= _start && pc < _limit; }
175 bool allocates2(address pc) const { return pc >= _start && pc <= _limit; }
176
177 void set_end(address pc) { assert(allocates2(pc), err_msg("not in CodeBuffer memory: " PTR_FORMAT " <= " PTR_FORMAT " <= " INTPTR_FORMAT, p2i(_start), p2i(pc), p2i(_limit))); _end = pc; }
178 void set_mark(address pc) { assert(contains2(pc), "not in codeBuffer");
179 _mark = pc; }
180 void set_mark_off(int offset) { assert(contains2(offset+_start),"not in codeBuffer");
181 _mark = offset + _start; }
182 void set_mark() { _mark = _end; }
183 void clear_mark() { _mark = NULL; }
184
185 void set_locs_end(relocInfo* p) {
186 assert(p <= locs_limit(), "locs data fits in allocated buffer");
187 _locs_end = p;
188 }
189 void set_locs_point(address pc) {
190 assert(pc >= locs_point(), "relocation addr may not decrease");
191 assert(allocates2(pc), "relocation addr must be in this section");
192 _locs_point = pc;
193 }
194
195 // Code emission
196 void emit_int8 ( int8_t x) { *((int8_t*) end()) = x; set_end(end() + sizeof(int8_t)); }
197 void emit_int16( int16_t x) { *((int16_t*) end()) = x; set_end(end() + sizeof(int16_t)); }
198 void emit_int32( int32_t x) { *((int32_t*) end()) = x; set_end(end() + sizeof(int32_t)); }
199 void emit_int64( int64_t x) { *((int64_t*) end()) = x; set_end(end() + sizeof(int64_t)); }
200
201 void emit_float( jfloat x) { *((jfloat*) end()) = x; set_end(end() + sizeof(jfloat)); }
202 void emit_double(jdouble x) { *((jdouble*) end()) = x; set_end(end() + sizeof(jdouble)); }
203 void emit_address(address x) { *((address*) end()) = x; set_end(end() + sizeof(address)); }
204
205 // Share a scratch buffer for relocinfo. (Hacky; saves a resource allocation.)
206 void initialize_shared_locs(relocInfo* buf, int length);
207
208 // Manage labels and their addresses.
209 address target(Label& L, address branch_pc);
210
211 // Emit a relocation.
212 void relocate(address at, RelocationHolder const& rspec, int format = 0);
213 void relocate(address at, relocInfo::relocType rtype, int format = 0) {
214 if (rtype != relocInfo::none)
215 relocate(at, Relocation::spec_simple(rtype), format);
216 }
217
218 // alignment requirement for starting offset
219 // Requirements are that the instruction area and the
220 // stubs area must start on CodeEntryAlignment, and
221 // the ctable on sizeof(jdouble)
222 int alignment() const { return MAX2((int)sizeof(jdouble), (int)CodeEntryAlignment); }
223
224 // Slop between sections, used only when allocating temporary BufferBlob buffers.
225 static csize_t end_slop() { return MAX2((int)sizeof(jdouble), (int)CodeEntryAlignment); }
226
227 csize_t align_at_start(csize_t off) const { return (csize_t) align_size_up(off, alignment()); }
228
229 // Mark a section frozen. Assign its remaining space to
230 // the following section. It will never expand after this point.
231 inline void freeze(); // { _outer->freeze_section(this); }
232
233 // Ensure there's enough space left in the current section.
234 // Return true if there was an expansion.
235 bool maybe_expand_to_ensure_remaining(csize_t amount);
236
237 #ifndef PRODUCT
238 void decode();
239 void dump();
240 void print(const char* name);
241 #endif //PRODUCT
242 };
243
244 class CodeString;
245 class CodeStrings VALUE_OBJ_CLASS_SPEC {
246 private:
247 #ifndef PRODUCT
248 CodeString* _strings;
249 #ifdef ASSERT
250 // Becomes true after copy-out, forbids further use.
251 bool _defunct; // Zero bit pattern is "valid", see memset call in decode_env::decode_env
252 #endif
253 #endif
254
255 CodeString* find(intptr_t offset) const;
256 CodeString* find_last(intptr_t offset) const;
257
258 void set_null_and_invalidate() {
259 #ifndef PRODUCT
260 _strings = NULL;
261 #ifdef ASSERT
262 _defunct = true;
263 #endif
264 #endif
265 }
266
267 public:
268 CodeStrings() {
269 #ifndef PRODUCT
270 _strings = NULL;
271 #ifdef ASSERT
272 _defunct = false;
273 #endif
274 #endif
275 }
276
277 bool is_null() {
278 #ifdef ASSERT
279 return _strings == NULL;
280 #else
281 return true;
282 #endif
283 }
284
285 const char* add_string(const char * string) PRODUCT_RETURN_(return NULL;);
286
287 void add_comment(intptr_t offset, const char * comment) PRODUCT_RETURN;
288 void print_block_comment(outputStream* stream, intptr_t offset) const PRODUCT_RETURN;
289 // MOVE strings from other to this; invalidate other.
290 void assign(CodeStrings& other) PRODUCT_RETURN;
291 // COPY strings from other to this; leave other valid.
292 void copy(CodeStrings& other) PRODUCT_RETURN;
293 void free() PRODUCT_RETURN;
294 // Guarantee that _strings are used at most once; assign invalidates a buffer.
295 inline void check_valid() const {
296 #ifdef ASSERT
297 assert(!_defunct, "Use of invalid CodeStrings");
298 #endif
299 }
300 };
301
302 // A CodeBuffer describes a memory space into which assembly
303 // code is generated. This memory space usually occupies the
304 // interior of a single BufferBlob, but in some cases it may be
305 // an arbitrary span of memory, even outside the code cache.
306 //
307 // A code buffer comes in two variants:
308 //
309 // (1) A CodeBuffer referring to an already allocated piece of memory:
310 // This is used to direct 'static' code generation (e.g. for interpreter
311 // or stubroutine generation, etc.). This code comes with NO relocation
312 // information.
313 //
314 // (2) A CodeBuffer referring to a piece of memory allocated when the
315 // CodeBuffer is allocated. This is used for nmethod generation.
316 //
317 // The memory can be divided up into several parts called sections.
318 // Each section independently accumulates code (or data) an relocations.
319 // Sections can grow (at the expense of a reallocation of the BufferBlob
320 // and recopying of all active sections). When the buffered code is finally
321 // written to an nmethod (or other CodeBlob), the contents (code, data,
322 // and relocations) of the sections are padded to an alignment and concatenated.
323 // Instructions and data in one section can contain relocatable references to
324 // addresses in a sibling section.
325
326 class CodeBuffer: public StackObj {
327 friend class CodeSection;
328
329 private:
330 // CodeBuffers must be allocated on the stack except for a single
331 // special case during expansion which is handled internally. This
332 // is done to guarantee proper cleanup of resources.
333 void* operator new(size_t size) throw() { return ResourceObj::operator new(size); }
334 void operator delete(void* p) { ShouldNotCallThis(); }
335
336 public:
337 typedef int csize_t; // code size type; would be size_t except for history
338 enum {
339 // Here is the list of all possible sections. The order reflects
340 // the final layout.
341 SECT_FIRST = 0,
342 SECT_CONSTS = SECT_FIRST, // Non-instruction data: Floats, jump tables, etc.
343 SECT_INSTS, // Executable instructions.
344 SECT_STUBS, // Outbound trampolines for supporting call sites.
345 SECT_LIMIT, SECT_NONE = -1
346 };
347
348 private:
349 enum {
350 sect_bits = 2, // assert (SECT_LIMIT <= (1<<sect_bits))
351 sect_mask = (1<<sect_bits)-1
352 };
353
354 const char* _name;
355
356 CodeSection _consts; // constants, jump tables
357 CodeSection _insts; // instructions (the main section)
358 CodeSection _stubs; // stubs (call site support), deopt, exception handling
359
360 CodeBuffer* _before_expand; // dead buffer, from before the last expansion
361
362 BufferBlob* _blob; // optional buffer in CodeCache for generated code
363 address _total_start; // first address of combined memory buffer
364 csize_t _total_size; // size in bytes of combined memory buffer
365
366 OopRecorder* _oop_recorder;
367 CodeStrings _code_strings;
368 OopRecorder _default_oop_recorder; // override with initialize_oop_recorder
369 Arena* _overflow_arena;
370
371 address _decode_begin; // start address for decode
372 address decode_begin();
373
374 void initialize_misc(const char * name) {
375 // all pointers other than code_start/end and those inside the sections
376 assert(name != NULL, "must have a name");
377 _name = name;
378 _before_expand = NULL;
379 _blob = NULL;
380 _oop_recorder = NULL;
381 _decode_begin = NULL;
382 _overflow_arena = NULL;
383 }
384
385 void initialize(address code_start, csize_t code_size) {
386 _consts.initialize_outer(this, SECT_CONSTS);
387 _insts.initialize_outer(this, SECT_INSTS);
388 _stubs.initialize_outer(this, SECT_STUBS);
389 _total_start = code_start;
390 _total_size = code_size;
391 // Initialize the main section:
392 _insts.initialize(code_start, code_size);
393 assert(!_stubs.is_allocated(), "no garbage here");
394 assert(!_consts.is_allocated(), "no garbage here");
395 _oop_recorder = &_default_oop_recorder;
396 }
397
398 void initialize_section_size(CodeSection* cs, csize_t size);
399
400 void freeze_section(CodeSection* cs);
401
402 // helper for CodeBuffer::expand()
403 void take_over_code_from(CodeBuffer* cs);
404
405 // ensure sections are disjoint, ordered, and contained in the blob
406 void verify_section_allocation();
407
408 // copies combined relocations to the blob, returns bytes copied
409 // (if target is null, it is a dry run only, just for sizing)
410 csize_t copy_relocations_to(CodeBlob* blob) const;
411
412 // copies combined code to the blob (assumes relocs are already in there)
413 void copy_code_to(CodeBlob* blob);
414
415 // moves code sections to new buffer (assumes relocs are already in there)
416 void relocate_code_to(CodeBuffer* cb) const;
417
418 // set up a model of the final layout of my contents
419 void compute_final_layout(CodeBuffer* dest) const;
420
421 // Expand the given section so at least 'amount' is remaining.
422 // Creates a new, larger BufferBlob, and rewrites the code & relocs.
423 void expand(CodeSection* which_cs, csize_t amount);
424
425 // Helper for expand.
426 csize_t figure_expanded_capacities(CodeSection* which_cs, csize_t amount, csize_t* new_capacity);
427
428 public:
429 // (1) code buffer referring to pre-allocated instruction memory
430 CodeBuffer(address code_start, csize_t code_size) {
431 assert(code_start != NULL, "sanity");
432 initialize_misc("static buffer");
433 initialize(code_start, code_size);
434 verify_section_allocation();
435 }
436
437 // (2) CodeBuffer referring to pre-allocated CodeBlob.
438 CodeBuffer(CodeBlob* blob);
439
440 // (3) code buffer allocating codeBlob memory for code & relocation
441 // info but with lazy initialization. The name must be something
442 // informative.
443 CodeBuffer(const char* name) {
444 initialize_misc(name);
445 }
446
447
448 // (4) code buffer allocating codeBlob memory for code & relocation
449 // info. The name must be something informative and code_size must
450 // include both code and stubs sizes.
451 CodeBuffer(const char* name, csize_t code_size, csize_t locs_size) {
452 initialize_misc(name);
453 initialize(code_size, locs_size);
454 }
455
456 ~CodeBuffer();
457
458 // Initialize a CodeBuffer constructed using constructor 3. Using
459 // constructor 4 is equivalent to calling constructor 3 and then
460 // calling this method. It's been factored out for convenience of
461 // construction.
462 void initialize(csize_t code_size, csize_t locs_size);
463
464 CodeSection* consts() { return &_consts; }
465 CodeSection* insts() { return &_insts; }
466 CodeSection* stubs() { return &_stubs; }
467
468 // present sections in order; return NULL at end; consts is #0, etc.
469 CodeSection* code_section(int n) {
470 // This makes the slightly questionable but portable assumption
471 // that the various members (_consts, _insts, _stubs, etc.) are
472 // adjacent in the layout of CodeBuffer.
473 CodeSection* cs = &_consts + n;
474 assert(cs->index() == n || !cs->is_allocated(), "sanity");
475 return cs;
476 }
477 const CodeSection* code_section(int n) const { // yucky const stuff
478 return ((CodeBuffer*)this)->code_section(n);
479 }
480 static const char* code_section_name(int n);
481 int section_index_of(address addr) const;
482 bool contains(address addr) const {
483 // handy for debugging
484 return section_index_of(addr) > SECT_NONE;
485 }
486
487 // A stable mapping between 'locators' (small ints) and addresses.
488 static int locator_pos(int locator) { return locator >> sect_bits; }
489 static int locator_sect(int locator) { return locator & sect_mask; }
490 static int locator(int pos, int sect) { return (pos << sect_bits) | sect; }
491 int locator(address addr) const;
492 address locator_address(int locator) const;
493
494 // Heuristic for pre-packing the taken/not-taken bit of a predicted branch.
495 bool is_backward_branch(Label& L);
496
497 // Properties
498 const char* name() const { return _name; }
499 CodeBuffer* before_expand() const { return _before_expand; }
500 BufferBlob* blob() const { return _blob; }
501 void set_blob(BufferBlob* blob);
502 void free_blob(); // Free the blob, if we own one.
503
504 // Properties relative to the insts section:
505 address insts_begin() const { return _insts.start(); }
506 address insts_end() const { return _insts.end(); }
507 void set_insts_end(address end) { _insts.set_end(end); }
508 address insts_limit() const { return _insts.limit(); }
509 address insts_mark() const { return _insts.mark(); }
510 void set_insts_mark() { _insts.set_mark(); }
511 void clear_insts_mark() { _insts.clear_mark(); }
512
513 // is there anything in the buffer other than the current section?
514 bool is_pure() const { return insts_size() == total_content_size(); }
515
516 // size in bytes of output so far in the insts sections
517 csize_t insts_size() const { return _insts.size(); }
518
519 // same as insts_size(), except that it asserts there is no non-code here
520 csize_t pure_insts_size() const { assert(is_pure(), "no non-code");
521 return insts_size(); }
522 // capacity in bytes of the insts sections
523 csize_t insts_capacity() const { return _insts.capacity(); }
524
525 // number of bytes remaining in the insts section
526 csize_t insts_remaining() const { return _insts.remaining(); }
527
528 // is a given address in the insts section? (2nd version is end-inclusive)
529 bool insts_contains(address pc) const { return _insts.contains(pc); }
530 bool insts_contains2(address pc) const { return _insts.contains2(pc); }
531
532 // Record any extra oops required to keep embedded metadata alive
533 void finalize_oop_references(methodHandle method);
534
535 // Allocated size in all sections, when aligned and concatenated
536 // (this is the eventual state of the content in its final
537 // CodeBlob).
538 csize_t total_content_size() const;
539
540 // Combined offset (relative to start of first section) of given
541 // section, as eventually found in the final CodeBlob.
542 csize_t total_offset_of(CodeSection* cs) const;
543
544 // allocated size of all relocation data, including index, rounded up
545 csize_t total_relocation_size() const;
546
547 // allocated size of any and all recorded oops
548 csize_t total_oop_size() const {
549 OopRecorder* recorder = oop_recorder();
550 return (recorder == NULL)? 0: recorder->oop_size();
551 }
552
553 // allocated size of any and all recorded metadata
554 csize_t total_metadata_size() const {
555 OopRecorder* recorder = oop_recorder();
556 return (recorder == NULL)? 0: recorder->metadata_size();
557 }
558
559 // Configuration functions, called immediately after the CB is constructed.
560 // The section sizes are subtracted from the original insts section.
561 // Note: Call them in reverse section order, because each steals from insts.
562 void initialize_consts_size(csize_t size) { initialize_section_size(&_consts, size); }
563 void initialize_stubs_size(csize_t size) { initialize_section_size(&_stubs, size); }
564 // Override default oop recorder.
565 void initialize_oop_recorder(OopRecorder* r);
566
567 OopRecorder* oop_recorder() const { return _oop_recorder; }
568 CodeStrings& strings() { return _code_strings; }
569
570 void free_strings() {
571 if (!_code_strings.is_null()) {
572 _code_strings.free(); // sets _strings Null as a side-effect.
573 }
574 }
575
576 // Code generation
577 void relocate(address at, RelocationHolder const& rspec, int format = 0) {
578 _insts.relocate(at, rspec, format);
579 }
580 void relocate(address at, relocInfo::relocType rtype, int format = 0) {
581 _insts.relocate(at, rtype, format);
582 }
583
584 // Management of overflow storage for binding of Labels.
585 GrowableArray<int>* create_patch_overflow();
586
587 // NMethod generation
588 void copy_code_and_locs_to(CodeBlob* blob) {
589 assert(blob != NULL, "sane");
590 copy_relocations_to(blob);
591 copy_code_to(blob);
592 }
593 void copy_values_to(nmethod* nm) {
594 if (!oop_recorder()->is_unused()) {
595 oop_recorder()->copy_values_to(nm);
596 }
597 }
598
599 // Transform an address from the code in this code buffer to a specified code buffer
600 address transform_address(const CodeBuffer &cb, address addr) const;
601
602 void block_comment(intptr_t offset, const char * comment) PRODUCT_RETURN;
603 const char* code_string(const char* str) PRODUCT_RETURN_(return NULL;);
604
605 // Log a little info about section usage in the CodeBuffer
606 void log_section_sizes(const char* name);
607
608 #ifndef PRODUCT
609 public:
610 // Printing / Decoding
611 // decodes from decode_begin() to code_end() and sets decode_begin to end
612 void decode();
613 void decode_all(); // decodes all the code
614 void skip_decode(); // sets decode_begin to code_end();
615 void print();
616 #endif
617
618
619 // The following header contains architecture-specific implementations
620 #ifdef TARGET_ARCH_x86
621 # include "codeBuffer_x86.hpp"
622 #endif
623 #ifdef TARGET_ARCH_aarch64
624 # include "codeBuffer_aarch64.hpp"
625 #endif
626 #ifdef TARGET_ARCH_sparc
627 # include "codeBuffer_sparc.hpp"
628 #endif
629 #ifdef TARGET_ARCH_zero
630 # include "codeBuffer_zero.hpp"
631 #endif
632 #ifdef TARGET_ARCH_arm
633 # include "codeBuffer_arm.hpp"
634 #endif
635 #ifdef TARGET_ARCH_ppc
636 # include "codeBuffer_ppc.hpp"
637 #endif
638
639 };
640
641
642 inline void CodeSection::freeze() {
643 _outer->freeze_section(this);
644 }
645
646 inline bool CodeSection::maybe_expand_to_ensure_remaining(csize_t amount) {
647 if (remaining() < amount) { _outer->expand(this, amount); return true; }
648 return false;
649 }
650
651 #endif // SHARE_VM_ASM_CODEBUFFER_HPP