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: " INTPTR_FORMAT " <= " INTPTR_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 // Becomes true after copy-out, forbids further use. 250 bool _defunct; // Zero bit pattern is "valid", see memset call in decode_env::decode_env 251 #endif 252 253 CodeString* find(intptr_t offset) const; 254 CodeString* find_last(intptr_t offset) const; 255 256 void set_null_and_invalidate() { 257 #ifdef ASSERT 258 _strings = NULL; 259 _defunct = true; 260 #endif 261 } 262 263 public: 264 CodeStrings() { 265 #ifndef PRODUCT 266 _strings = NULL; 267 _defunct = false; 268 #endif 269 } 270 271 bool isNull() { 272 #ifdef ASSERT 273 return _strings == NULL; 274 #else 275 return true; 276 #endif 277 } 278 279 const char* add_string(const char * string) PRODUCT_RETURN_(return NULL;); 280 281 void add_comment(intptr_t offset, const char * comment) PRODUCT_RETURN; 282 void print_block_comment(outputStream* stream, intptr_t offset) const PRODUCT_RETURN; 283 // MOVE strings from other to this; invalidate other. 284 void assign(CodeStrings& other) PRODUCT_RETURN; 285 // COPY strings from other to this; leave other valid. 286 void copy(CodeStrings& other) PRODUCT_RETURN; 287 void free() PRODUCT_RETURN; 288 // Guarantee that _strings are used at most once; assign invalidates a buffer. 289 inline void check_valid() const { 290 #ifdef ASSERT 291 assert(!_defunct, "Use of invalid CodeStrings"); 292 #endif 293 } 294 }; 295 296 // A CodeBuffer describes a memory space into which assembly 297 // code is generated. This memory space usually occupies the 298 // interior of a single BufferBlob, but in some cases it may be 299 // an arbitrary span of memory, even outside the code cache. 300 // 301 // A code buffer comes in two variants: 302 // 303 // (1) A CodeBuffer referring to an already allocated piece of memory: 304 // This is used to direct 'static' code generation (e.g. for interpreter 305 // or stubroutine generation, etc.). This code comes with NO relocation 306 // information. 307 // 308 // (2) A CodeBuffer referring to a piece of memory allocated when the 309 // CodeBuffer is allocated. This is used for nmethod generation. 310 // 311 // The memory can be divided up into several parts called sections. 312 // Each section independently accumulates code (or data) an relocations. 313 // Sections can grow (at the expense of a reallocation of the BufferBlob 314 // and recopying of all active sections). When the buffered code is finally 315 // written to an nmethod (or other CodeBlob), the contents (code, data, 316 // and relocations) of the sections are padded to an alignment and concatenated. 317 // Instructions and data in one section can contain relocatable references to 318 // addresses in a sibling section. 319 320 class CodeBuffer: public StackObj { 321 friend class CodeSection; 322 323 private: 324 // CodeBuffers must be allocated on the stack except for a single 325 // special case during expansion which is handled internally. This 326 // is done to guarantee proper cleanup of resources. 327 void* operator new(size_t size) throw() { return ResourceObj::operator new(size); } 328 void operator delete(void* p) { ShouldNotCallThis(); } 329 330 public: 331 typedef int csize_t; // code size type; would be size_t except for history 332 enum { 333 // Here is the list of all possible sections. The order reflects 334 // the final layout. 335 SECT_FIRST = 0, 336 SECT_CONSTS = SECT_FIRST, // Non-instruction data: Floats, jump tables, etc. 337 SECT_INSTS, // Executable instructions. 338 SECT_STUBS, // Outbound trampolines for supporting call sites. 339 SECT_LIMIT, SECT_NONE = -1 340 }; 341 342 private: 343 enum { 344 sect_bits = 2, // assert (SECT_LIMIT <= (1<<sect_bits)) 345 sect_mask = (1<<sect_bits)-1 346 }; 347 348 const char* _name; 349 350 CodeSection _consts; // constants, jump tables 351 CodeSection _insts; // instructions (the main section) 352 CodeSection _stubs; // stubs (call site support), deopt, exception handling 353 354 CodeBuffer* _before_expand; // dead buffer, from before the last expansion 355 356 BufferBlob* _blob; // optional buffer in CodeCache for generated code 357 address _total_start; // first address of combined memory buffer 358 csize_t _total_size; // size in bytes of combined memory buffer 359 360 OopRecorder* _oop_recorder; 361 CodeStrings _strings; 362 OopRecorder _default_oop_recorder; // override with initialize_oop_recorder 363 Arena* _overflow_arena; 364 365 address _decode_begin; // start address for decode 366 address decode_begin(); 367 368 void initialize_misc(const char * name) { 369 // all pointers other than code_start/end and those inside the sections 370 assert(name != NULL, "must have a name"); 371 _name = name; 372 _before_expand = NULL; 373 _blob = NULL; 374 _oop_recorder = NULL; 375 _decode_begin = NULL; 376 _overflow_arena = NULL; 377 } 378 379 void initialize(address code_start, csize_t code_size) { 380 _consts.initialize_outer(this, SECT_CONSTS); 381 _insts.initialize_outer(this, SECT_INSTS); 382 _stubs.initialize_outer(this, SECT_STUBS); 383 _total_start = code_start; 384 _total_size = code_size; 385 // Initialize the main section: 386 _insts.initialize(code_start, code_size); 387 assert(!_stubs.is_allocated(), "no garbage here"); 388 assert(!_consts.is_allocated(), "no garbage here"); 389 _oop_recorder = &_default_oop_recorder; 390 } 391 392 void initialize_section_size(CodeSection* cs, csize_t size); 393 394 void freeze_section(CodeSection* cs); 395 396 // helper for CodeBuffer::expand() 397 void take_over_code_from(CodeBuffer* cs); 398 399 // ensure sections are disjoint, ordered, and contained in the blob 400 void verify_section_allocation(); 401 402 // copies combined relocations to the blob, returns bytes copied 403 // (if target is null, it is a dry run only, just for sizing) 404 csize_t copy_relocations_to(CodeBlob* blob) const; 405 406 // copies combined code to the blob (assumes relocs are already in there) 407 void copy_code_to(CodeBlob* blob); 408 409 // moves code sections to new buffer (assumes relocs are already in there) 410 void relocate_code_to(CodeBuffer* cb) const; 411 412 // set up a model of the final layout of my contents 413 void compute_final_layout(CodeBuffer* dest) const; 414 415 // Expand the given section so at least 'amount' is remaining. 416 // Creates a new, larger BufferBlob, and rewrites the code & relocs. 417 void expand(CodeSection* which_cs, csize_t amount); 418 419 // Helper for expand. 420 csize_t figure_expanded_capacities(CodeSection* which_cs, csize_t amount, csize_t* new_capacity); 421 422 public: 423 // (1) code buffer referring to pre-allocated instruction memory 424 CodeBuffer(address code_start, csize_t code_size) { 425 assert(code_start != NULL, "sanity"); 426 initialize_misc("static buffer"); 427 initialize(code_start, code_size); 428 verify_section_allocation(); 429 } 430 431 // (2) CodeBuffer referring to pre-allocated CodeBlob. 432 CodeBuffer(CodeBlob* blob); 433 434 // (3) code buffer allocating codeBlob memory for code & relocation 435 // info but with lazy initialization. The name must be something 436 // informative. 437 CodeBuffer(const char* name) { 438 initialize_misc(name); 439 } 440 441 442 // (4) code buffer allocating codeBlob memory for code & relocation 443 // info. The name must be something informative and code_size must 444 // include both code and stubs sizes. 445 CodeBuffer(const char* name, csize_t code_size, csize_t locs_size) { 446 initialize_misc(name); 447 initialize(code_size, locs_size); 448 } 449 450 ~CodeBuffer(); 451 452 // Initialize a CodeBuffer constructed using constructor 3. Using 453 // constructor 4 is equivalent to calling constructor 3 and then 454 // calling this method. It's been factored out for convenience of 455 // construction. 456 void initialize(csize_t code_size, csize_t locs_size); 457 458 CodeSection* consts() { return &_consts; } 459 CodeSection* insts() { return &_insts; } 460 CodeSection* stubs() { return &_stubs; } 461 462 // present sections in order; return NULL at end; consts is #0, etc. 463 CodeSection* code_section(int n) { 464 // This makes the slightly questionable but portable assumption 465 // that the various members (_consts, _insts, _stubs, etc.) are 466 // adjacent in the layout of CodeBuffer. 467 CodeSection* cs = &_consts + n; 468 assert(cs->index() == n || !cs->is_allocated(), "sanity"); 469 return cs; 470 } 471 const CodeSection* code_section(int n) const { // yucky const stuff 472 return ((CodeBuffer*)this)->code_section(n); 473 } 474 static const char* code_section_name(int n); 475 int section_index_of(address addr) const; 476 bool contains(address addr) const { 477 // handy for debugging 478 return section_index_of(addr) > SECT_NONE; 479 } 480 481 // A stable mapping between 'locators' (small ints) and addresses. 482 static int locator_pos(int locator) { return locator >> sect_bits; } 483 static int locator_sect(int locator) { return locator & sect_mask; } 484 static int locator(int pos, int sect) { return (pos << sect_bits) | sect; } 485 int locator(address addr) const; 486 address locator_address(int locator) const; 487 488 // Heuristic for pre-packing the taken/not-taken bit of a predicted branch. 489 bool is_backward_branch(Label& L); 490 491 // Properties 492 const char* name() const { return _name; } 493 CodeBuffer* before_expand() const { return _before_expand; } 494 BufferBlob* blob() const { return _blob; } 495 void set_blob(BufferBlob* blob); 496 void free_blob(); // Free the blob, if we own one. 497 498 // Properties relative to the insts section: 499 address insts_begin() const { return _insts.start(); } 500 address insts_end() const { return _insts.end(); } 501 void set_insts_end(address end) { _insts.set_end(end); } 502 address insts_limit() const { return _insts.limit(); } 503 address insts_mark() const { return _insts.mark(); } 504 void set_insts_mark() { _insts.set_mark(); } 505 void clear_insts_mark() { _insts.clear_mark(); } 506 507 // is there anything in the buffer other than the current section? 508 bool is_pure() const { return insts_size() == total_content_size(); } 509 510 // size in bytes of output so far in the insts sections 511 csize_t insts_size() const { return _insts.size(); } 512 513 // same as insts_size(), except that it asserts there is no non-code here 514 csize_t pure_insts_size() const { assert(is_pure(), "no non-code"); 515 return insts_size(); } 516 // capacity in bytes of the insts sections 517 csize_t insts_capacity() const { return _insts.capacity(); } 518 519 // number of bytes remaining in the insts section 520 csize_t insts_remaining() const { return _insts.remaining(); } 521 522 // is a given address in the insts section? (2nd version is end-inclusive) 523 bool insts_contains(address pc) const { return _insts.contains(pc); } 524 bool insts_contains2(address pc) const { return _insts.contains2(pc); } 525 526 // Record any extra oops required to keep embedded metadata alive 527 void finalize_oop_references(methodHandle method); 528 529 // Allocated size in all sections, when aligned and concatenated 530 // (this is the eventual state of the content in its final 531 // CodeBlob). 532 csize_t total_content_size() const; 533 534 // Combined offset (relative to start of first section) of given 535 // section, as eventually found in the final CodeBlob. 536 csize_t total_offset_of(CodeSection* cs) const; 537 538 // allocated size of all relocation data, including index, rounded up 539 csize_t total_relocation_size() const; 540 541 // allocated size of any and all recorded oops 542 csize_t total_oop_size() const { 543 OopRecorder* recorder = oop_recorder(); 544 return (recorder == NULL)? 0: recorder->oop_size(); 545 } 546 547 // allocated size of any and all recorded metadata 548 csize_t total_metadata_size() const { 549 OopRecorder* recorder = oop_recorder(); 550 return (recorder == NULL)? 0: recorder->metadata_size(); 551 } 552 553 // Configuration functions, called immediately after the CB is constructed. 554 // The section sizes are subtracted from the original insts section. 555 // Note: Call them in reverse section order, because each steals from insts. 556 void initialize_consts_size(csize_t size) { initialize_section_size(&_consts, size); } 557 void initialize_stubs_size(csize_t size) { initialize_section_size(&_stubs, size); } 558 // Override default oop recorder. 559 void initialize_oop_recorder(OopRecorder* r); 560 561 OopRecorder* oop_recorder() const { return _oop_recorder; } 562 CodeStrings& strings() { return _strings; } 563 564 void free_strings() { 565 if (!_strings.isNull()) { 566 _strings.free(); // sets _strings Null as a side-effect. 567 } 568 } 569 570 // Code generation 571 void relocate(address at, RelocationHolder const& rspec, int format = 0) { 572 _insts.relocate(at, rspec, format); 573 } 574 void relocate(address at, relocInfo::relocType rtype, int format = 0) { 575 _insts.relocate(at, rtype, format); 576 } 577 578 // Management of overflow storage for binding of Labels. 579 GrowableArray<int>* create_patch_overflow(); 580 581 // NMethod generation 582 void copy_code_and_locs_to(CodeBlob* blob) { 583 assert(blob != NULL, "sane"); 584 copy_relocations_to(blob); 585 copy_code_to(blob); 586 } 587 void copy_values_to(nmethod* nm) { 588 if (!oop_recorder()->is_unused()) { 589 oop_recorder()->copy_values_to(nm); 590 } 591 } 592 593 // Transform an address from the code in this code buffer to a specified code buffer 594 address transform_address(const CodeBuffer &cb, address addr) const; 595 596 void block_comment(intptr_t offset, const char * comment) PRODUCT_RETURN; 597 const char* code_string(const char* str) PRODUCT_RETURN_(return NULL;); 598 599 // Log a little info about section usage in the CodeBuffer 600 void log_section_sizes(const char* name); 601 602 #ifndef PRODUCT 603 public: 604 // Printing / Decoding 605 // decodes from decode_begin() to code_end() and sets decode_begin to end 606 void decode(); 607 void decode_all(); // decodes all the code 608 void skip_decode(); // sets decode_begin to code_end(); 609 void print(); 610 #endif 611 612 613 // The following header contains architecture-specific implementations 614 #ifdef TARGET_ARCH_x86 615 # include "codeBuffer_x86.hpp" 616 #endif 617 #ifdef TARGET_ARCH_sparc 618 # include "codeBuffer_sparc.hpp" 619 #endif 620 #ifdef TARGET_ARCH_zero 621 # include "codeBuffer_zero.hpp" 622 #endif 623 #ifdef TARGET_ARCH_arm 624 # include "codeBuffer_arm.hpp" 625 #endif 626 #ifdef TARGET_ARCH_ppc 627 # include "codeBuffer_ppc.hpp" 628 #endif 629 630 }; 631 632 633 inline void CodeSection::freeze() { 634 _outer->freeze_section(this); 635 } 636 637 inline bool CodeSection::maybe_expand_to_ensure_remaining(csize_t amount) { 638 if (remaining() < amount) { _outer->expand(this, amount); return true; } 639 return false; 640 } 641 642 #endif // SHARE_VM_ASM_CODEBUFFER_HPP