Mercurial > hg > truffle
annotate src/share/vm/asm/codeBuffer.hpp @ 8767:a5de0cc2f91c
8008555: Debugging code in compiled method sometimes leaks memory
Summary: support for strings that have same life-time as code that uses them.
Reviewed-by: kvn, twisti
| author | roland |
|---|---|
| date | Mon, 18 Mar 2013 13:19:06 +0100 |
| parents | cd3d6a6b95d9 |
| children | 9758d9f36299 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 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 | |
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31 class CodeStrings; |
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32 class PhaseCFG; |
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33 class Compile; |
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34 class BufferBlob; |
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35 class CodeBuffer; |
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36 class Label; |
| 0 | 37 |
| 38 class CodeOffsets: public StackObj { | |
| 39 public: | |
| 40 enum Entries { Entry, | |
| 41 Verified_Entry, | |
| 42 Frame_Complete, // Offset in the code where the frame setup is (for forte stackwalks) is complete | |
| 43 OSR_Entry, | |
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44 Dtrace_trap = OSR_Entry, // dtrace probes can never have an OSR entry so reuse it |
| 0 | 45 Exceptions, // Offset where exception handler lives |
| 46 Deopt, // Offset where deopt handler lives | |
| 1204 | 47 DeoptMH, // Offset where MethodHandle deopt handler lives |
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48 UnwindHandler, // Offset to default unwind handler |
| 0 | 49 max_Entries }; |
| 50 | |
| 51 // special value to note codeBlobs where profile (forte) stack walking is | |
| 52 // always dangerous and suspect. | |
| 53 | |
| 54 enum { frame_never_safe = -1 }; | |
| 55 | |
| 56 private: | |
| 57 int _values[max_Entries]; | |
| 58 | |
| 59 public: | |
| 60 CodeOffsets() { | |
| 1204 | 61 _values[Entry ] = 0; |
| 0 | 62 _values[Verified_Entry] = 0; |
| 63 _values[Frame_Complete] = frame_never_safe; | |
| 1204 | 64 _values[OSR_Entry ] = 0; |
| 65 _values[Exceptions ] = -1; | |
| 66 _values[Deopt ] = -1; | |
| 67 _values[DeoptMH ] = -1; | |
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68 _values[UnwindHandler ] = -1; |
| 0 | 69 } |
| 70 | |
| 71 int value(Entries e) { return _values[e]; } | |
| 72 void set_value(Entries e, int val) { _values[e] = val; } | |
| 73 }; | |
| 74 | |
| 75 // This class represents a stream of code and associated relocations. | |
| 76 // There are a few in each CodeBuffer. | |
| 77 // They are filled concurrently, and concatenated at the end. | |
| 78 class CodeSection VALUE_OBJ_CLASS_SPEC { | |
| 79 friend class CodeBuffer; | |
| 80 public: | |
| 81 typedef int csize_t; // code size type; would be size_t except for history | |
| 82 | |
| 83 private: | |
| 84 address _start; // first byte of contents (instructions) | |
| 85 address _mark; // user mark, usually an instruction beginning | |
| 86 address _end; // current end address | |
| 87 address _limit; // last possible (allocated) end address | |
| 88 relocInfo* _locs_start; // first byte of relocation information | |
| 89 relocInfo* _locs_end; // first byte after relocation information | |
| 90 relocInfo* _locs_limit; // first byte after relocation information buf | |
| 91 address _locs_point; // last relocated position (grows upward) | |
| 92 bool _locs_own; // did I allocate the locs myself? | |
| 93 bool _frozen; // no more expansion of this section | |
| 94 char _index; // my section number (SECT_INST, etc.) | |
| 95 CodeBuffer* _outer; // enclosing CodeBuffer | |
| 96 | |
| 97 // (Note: _locs_point used to be called _last_reloc_offset.) | |
| 98 | |
| 99 CodeSection() { | |
| 100 _start = NULL; | |
| 101 _mark = NULL; | |
| 102 _end = NULL; | |
| 103 _limit = NULL; | |
| 104 _locs_start = NULL; | |
| 105 _locs_end = NULL; | |
| 106 _locs_limit = NULL; | |
| 107 _locs_point = NULL; | |
| 108 _locs_own = false; | |
| 109 _frozen = false; | |
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110 debug_only(_index = (char)-1); |
| 0 | 111 debug_only(_outer = (CodeBuffer*)badAddress); |
| 112 } | |
| 113 | |
| 114 void initialize_outer(CodeBuffer* outer, int index) { | |
| 115 _outer = outer; | |
| 116 _index = index; | |
| 117 } | |
| 118 | |
| 119 void initialize(address start, csize_t size = 0) { | |
| 120 assert(_start == NULL, "only one init step, please"); | |
| 121 _start = start; | |
| 122 _mark = NULL; | |
| 123 _end = start; | |
| 124 | |
| 125 _limit = start + size; | |
| 126 _locs_point = start; | |
| 127 } | |
| 128 | |
| 129 void initialize_locs(int locs_capacity); | |
| 130 void expand_locs(int new_capacity); | |
| 131 void initialize_locs_from(const CodeSection* source_cs); | |
| 132 | |
| 133 // helper for CodeBuffer::expand() | |
| 134 void take_over_code_from(CodeSection* cs) { | |
| 135 _start = cs->_start; | |
| 136 _mark = cs->_mark; | |
| 137 _end = cs->_end; | |
| 138 _limit = cs->_limit; | |
| 139 _locs_point = cs->_locs_point; | |
| 140 } | |
| 141 | |
| 142 public: | |
| 143 address start() const { return _start; } | |
| 144 address mark() const { return _mark; } | |
| 145 address end() const { return _end; } | |
| 146 address limit() const { return _limit; } | |
| 147 csize_t size() const { return (csize_t)(_end - _start); } | |
| 148 csize_t mark_off() const { assert(_mark != NULL, "not an offset"); | |
| 149 return (csize_t)(_mark - _start); } | |
| 150 csize_t capacity() const { return (csize_t)(_limit - _start); } | |
| 151 csize_t remaining() const { return (csize_t)(_limit - _end); } | |
| 152 | |
| 153 relocInfo* locs_start() const { return _locs_start; } | |
| 154 relocInfo* locs_end() const { return _locs_end; } | |
| 155 int locs_count() const { return (int)(_locs_end - _locs_start); } | |
| 156 relocInfo* locs_limit() const { return _locs_limit; } | |
| 157 address locs_point() const { return _locs_point; } | |
| 158 csize_t locs_point_off() const{ return (csize_t)(_locs_point - _start); } | |
| 159 csize_t locs_capacity() const { return (csize_t)(_locs_limit - _locs_start); } | |
| 160 csize_t locs_remaining()const { return (csize_t)(_locs_limit - _locs_end); } | |
| 161 | |
| 162 int index() const { return _index; } | |
| 163 bool is_allocated() const { return _start != NULL; } | |
| 164 bool is_empty() const { return _start == _end; } | |
| 165 bool is_frozen() const { return _frozen; } | |
| 166 bool has_locs() const { return _locs_end != NULL; } | |
| 167 | |
| 168 CodeBuffer* outer() const { return _outer; } | |
| 169 | |
| 170 // is a given address in this section? (2nd version is end-inclusive) | |
| 171 bool contains(address pc) const { return pc >= _start && pc < _end; } | |
| 172 bool contains2(address pc) const { return pc >= _start && pc <= _end; } | |
| 173 bool allocates(address pc) const { return pc >= _start && pc < _limit; } | |
| 174 bool allocates2(address pc) const { return pc >= _start && pc <= _limit; } | |
| 175 | |
| 1846 | 176 void set_end(address pc) { assert(allocates2(pc), err_msg("not in CodeBuffer memory: " PTR_FORMAT " <= " PTR_FORMAT " <= " PTR_FORMAT, _start, pc, _limit)); _end = pc; } |
| 177 void set_mark(address pc) { assert(contains2(pc), "not in codeBuffer"); | |
| 0 | 178 _mark = pc; } |
| 179 void set_mark_off(int offset) { assert(contains2(offset+_start),"not in codeBuffer"); | |
| 180 _mark = offset + _start; } | |
| 181 void set_mark() { _mark = _end; } | |
| 182 void clear_mark() { _mark = NULL; } | |
| 183 | |
| 184 void set_locs_end(relocInfo* p) { | |
| 185 assert(p <= locs_limit(), "locs data fits in allocated buffer"); | |
| 186 _locs_end = p; | |
| 187 } | |
| 188 void set_locs_point(address pc) { | |
| 189 assert(pc >= locs_point(), "relocation addr may not decrease"); | |
| 190 assert(allocates2(pc), "relocation addr must be in this section"); | |
| 191 _locs_point = pc; | |
| 192 } | |
| 193 | |
| 1748 | 194 // Code emission |
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195 void emit_int8 ( int8_t x) { *((int8_t*) end()) = x; set_end(end() + sizeof(int8_t)); } |
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196 void emit_int16( int16_t x) { *((int16_t*) end()) = x; set_end(end() + sizeof(int16_t)); } |
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197 void emit_int32( int32_t x) { *((int32_t*) end()) = x; set_end(end() + sizeof(int32_t)); } |
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198 void emit_int64( int64_t x) { *((int64_t*) end()) = x; set_end(end() + sizeof(int64_t)); } |
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199 |
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200 void emit_float( jfloat x) { *((jfloat*) end()) = x; set_end(end() + sizeof(jfloat)); } |
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201 void emit_double(jdouble x) { *((jdouble*) end()) = x; set_end(end() + sizeof(jdouble)); } |
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202 void emit_address(address x) { *((address*) end()) = x; set_end(end() + sizeof(address)); } |
| 1748 | 203 |
| 0 | 204 // Share a scratch buffer for relocinfo. (Hacky; saves a resource allocation.) |
| 205 void initialize_shared_locs(relocInfo* buf, int length); | |
| 206 | |
| 207 // Manage labels and their addresses. | |
| 208 address target(Label& L, address branch_pc); | |
| 209 | |
| 210 // Emit a relocation. | |
| 211 void relocate(address at, RelocationHolder const& rspec, int format = 0); | |
| 212 void relocate(address at, relocInfo::relocType rtype, int format = 0) { | |
| 213 if (rtype != relocInfo::none) | |
| 214 relocate(at, Relocation::spec_simple(rtype), format); | |
| 215 } | |
| 216 | |
| 217 // alignment requirement for starting offset | |
| 218 // Requirements are that the instruction area and the | |
| 219 // stubs area must start on CodeEntryAlignment, and | |
| 220 // the ctable on sizeof(jdouble) | |
| 221 int alignment() const { return MAX2((int)sizeof(jdouble), (int)CodeEntryAlignment); } | |
| 222 | |
| 223 // Slop between sections, used only when allocating temporary BufferBlob buffers. | |
| 224 static csize_t end_slop() { return MAX2((int)sizeof(jdouble), (int)CodeEntryAlignment); } | |
| 225 | |
| 226 csize_t align_at_start(csize_t off) const { return (csize_t) align_size_up(off, alignment()); } | |
| 227 | |
| 228 // Mark a section frozen. Assign its remaining space to | |
| 229 // the following section. It will never expand after this point. | |
| 230 inline void freeze(); // { _outer->freeze_section(this); } | |
| 231 | |
| 232 // Ensure there's enough space left in the current section. | |
| 233 // Return true if there was an expansion. | |
| 234 bool maybe_expand_to_ensure_remaining(csize_t amount); | |
| 235 | |
| 236 #ifndef PRODUCT | |
| 237 void decode(); | |
| 238 void dump(); | |
| 239 void print(const char* name); | |
| 240 #endif //PRODUCT | |
| 241 }; | |
| 242 | |
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243 class CodeString; |
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244 class CodeStrings VALUE_OBJ_CLASS_SPEC { |
| 0 | 245 private: |
| 246 #ifndef PRODUCT | |
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247 CodeString* _strings; |
| 0 | 248 #endif |
| 249 | |
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250 CodeString* find(intptr_t offset) const; |
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251 CodeString* find_last(intptr_t offset) const; |
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252 |
| 0 | 253 public: |
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254 CodeStrings() { |
| 0 | 255 #ifndef PRODUCT |
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256 _strings = NULL; |
| 0 | 257 #endif |
| 258 } | |
| 259 | |
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260 const char* add_string(const char * string) PRODUCT_RETURN_(return NULL;); |
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261 |
| 0 | 262 void add_comment(intptr_t offset, const char * comment) PRODUCT_RETURN; |
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263 void print_block_comment(outputStream* stream, intptr_t offset) const PRODUCT_RETURN; |
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264 void assign(CodeStrings& other) PRODUCT_RETURN; |
| 0 | 265 void free() PRODUCT_RETURN; |
| 266 }; | |
| 267 | |
| 268 // A CodeBuffer describes a memory space into which assembly | |
| 269 // code is generated. This memory space usually occupies the | |
| 270 // interior of a single BufferBlob, but in some cases it may be | |
| 271 // an arbitrary span of memory, even outside the code cache. | |
| 272 // | |
| 273 // A code buffer comes in two variants: | |
| 274 // | |
| 275 // (1) A CodeBuffer referring to an already allocated piece of memory: | |
| 276 // This is used to direct 'static' code generation (e.g. for interpreter | |
| 277 // or stubroutine generation, etc.). This code comes with NO relocation | |
| 278 // information. | |
| 279 // | |
| 280 // (2) A CodeBuffer referring to a piece of memory allocated when the | |
| 281 // CodeBuffer is allocated. This is used for nmethod generation. | |
| 282 // | |
| 283 // The memory can be divided up into several parts called sections. | |
| 284 // Each section independently accumulates code (or data) an relocations. | |
| 285 // Sections can grow (at the expense of a reallocation of the BufferBlob | |
| 286 // and recopying of all active sections). When the buffered code is finally | |
| 287 // written to an nmethod (or other CodeBlob), the contents (code, data, | |
| 288 // and relocations) of the sections are padded to an alignment and concatenated. | |
| 289 // Instructions and data in one section can contain relocatable references to | |
| 290 // addresses in a sibling section. | |
| 291 | |
| 292 class CodeBuffer: public StackObj { | |
| 293 friend class CodeSection; | |
| 294 | |
| 295 private: | |
| 296 // CodeBuffers must be allocated on the stack except for a single | |
| 297 // special case during expansion which is handled internally. This | |
| 298 // is done to guarantee proper cleanup of resources. | |
| 299 void* operator new(size_t size) { return ResourceObj::operator new(size); } | |
| 1685 | 300 void operator delete(void* p) { ShouldNotCallThis(); } |
| 0 | 301 |
| 302 public: | |
| 303 typedef int csize_t; // code size type; would be size_t except for history | |
| 304 enum { | |
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305 // Here is the list of all possible sections. The order reflects |
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306 // the final layout. |
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307 SECT_FIRST = 0, |
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308 SECT_CONSTS = SECT_FIRST, // Non-instruction data: Floats, jump tables, etc. |
| 0 | 309 SECT_INSTS, // Executable instructions. |
| 310 SECT_STUBS, // Outbound trampolines for supporting call sites. | |
| 311 SECT_LIMIT, SECT_NONE = -1 | |
| 312 }; | |
| 313 | |
| 314 private: | |
| 315 enum { | |
| 316 sect_bits = 2, // assert (SECT_LIMIT <= (1<<sect_bits)) | |
| 317 sect_mask = (1<<sect_bits)-1 | |
| 318 }; | |
| 319 | |
| 320 const char* _name; | |
| 321 | |
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322 CodeSection _consts; // constants, jump tables |
| 0 | 323 CodeSection _insts; // instructions (the main section) |
| 324 CodeSection _stubs; // stubs (call site support), deopt, exception handling | |
| 325 | |
| 326 CodeBuffer* _before_expand; // dead buffer, from before the last expansion | |
| 327 | |
| 328 BufferBlob* _blob; // optional buffer in CodeCache for generated code | |
| 329 address _total_start; // first address of combined memory buffer | |
| 330 csize_t _total_size; // size in bytes of combined memory buffer | |
| 331 | |
| 332 OopRecorder* _oop_recorder; | |
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333 CodeStrings _strings; |
| 0 | 334 OopRecorder _default_oop_recorder; // override with initialize_oop_recorder |
| 335 Arena* _overflow_arena; | |
| 336 | |
| 337 address _decode_begin; // start address for decode | |
| 338 address decode_begin(); | |
| 339 | |
| 340 void initialize_misc(const char * name) { | |
| 341 // all pointers other than code_start/end and those inside the sections | |
| 342 assert(name != NULL, "must have a name"); | |
| 343 _name = name; | |
| 344 _before_expand = NULL; | |
| 345 _blob = NULL; | |
| 346 _oop_recorder = NULL; | |
| 347 _decode_begin = NULL; | |
| 348 _overflow_arena = NULL; | |
| 349 } | |
| 350 | |
| 351 void initialize(address code_start, csize_t code_size) { | |
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352 _consts.initialize_outer(this, SECT_CONSTS); |
| 0 | 353 _insts.initialize_outer(this, SECT_INSTS); |
| 354 _stubs.initialize_outer(this, SECT_STUBS); | |
| 355 _total_start = code_start; | |
| 356 _total_size = code_size; | |
| 357 // Initialize the main section: | |
| 358 _insts.initialize(code_start, code_size); | |
| 359 assert(!_stubs.is_allocated(), "no garbage here"); | |
| 360 assert(!_consts.is_allocated(), "no garbage here"); | |
| 361 _oop_recorder = &_default_oop_recorder; | |
| 362 } | |
| 363 | |
| 364 void initialize_section_size(CodeSection* cs, csize_t size); | |
| 365 | |
| 366 void freeze_section(CodeSection* cs); | |
| 367 | |
| 368 // helper for CodeBuffer::expand() | |
| 369 void take_over_code_from(CodeBuffer* cs); | |
| 370 | |
| 371 // ensure sections are disjoint, ordered, and contained in the blob | |
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372 void verify_section_allocation(); |
| 0 | 373 |
| 374 // copies combined relocations to the blob, returns bytes copied | |
| 375 // (if target is null, it is a dry run only, just for sizing) | |
| 376 csize_t copy_relocations_to(CodeBlob* blob) const; | |
| 377 | |
| 378 // copies combined code to the blob (assumes relocs are already in there) | |
| 379 void copy_code_to(CodeBlob* blob); | |
| 380 | |
| 381 // moves code sections to new buffer (assumes relocs are already in there) | |
| 382 void relocate_code_to(CodeBuffer* cb) const; | |
| 383 | |
| 384 // set up a model of the final layout of my contents | |
| 385 void compute_final_layout(CodeBuffer* dest) const; | |
| 386 | |
| 387 // Expand the given section so at least 'amount' is remaining. | |
| 388 // Creates a new, larger BufferBlob, and rewrites the code & relocs. | |
| 389 void expand(CodeSection* which_cs, csize_t amount); | |
| 390 | |
| 391 // Helper for expand. | |
| 392 csize_t figure_expanded_capacities(CodeSection* which_cs, csize_t amount, csize_t* new_capacity); | |
| 393 | |
| 394 public: | |
| 395 // (1) code buffer referring to pre-allocated instruction memory | |
| 1748 | 396 CodeBuffer(address code_start, csize_t code_size) { |
| 397 assert(code_start != NULL, "sanity"); | |
| 398 initialize_misc("static buffer"); | |
| 399 initialize(code_start, code_size); | |
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400 verify_section_allocation(); |
| 1748 | 401 } |
| 0 | 402 |
| 1748 | 403 // (2) CodeBuffer referring to pre-allocated CodeBlob. |
| 404 CodeBuffer(CodeBlob* blob); | |
| 405 | |
| 406 // (3) code buffer allocating codeBlob memory for code & relocation | |
| 0 | 407 // info but with lazy initialization. The name must be something |
| 408 // informative. | |
| 409 CodeBuffer(const char* name) { | |
| 410 initialize_misc(name); | |
| 411 } | |
| 412 | |
| 413 | |
| 1748 | 414 // (4) code buffer allocating codeBlob memory for code & relocation |
| 0 | 415 // info. The name must be something informative and code_size must |
| 416 // include both code and stubs sizes. | |
| 417 CodeBuffer(const char* name, csize_t code_size, csize_t locs_size) { | |
| 418 initialize_misc(name); | |
| 419 initialize(code_size, locs_size); | |
| 420 } | |
| 421 | |
| 422 ~CodeBuffer(); | |
| 423 | |
| 1748 | 424 // Initialize a CodeBuffer constructed using constructor 3. Using |
| 425 // constructor 4 is equivalent to calling constructor 3 and then | |
| 0 | 426 // calling this method. It's been factored out for convenience of |
| 427 // construction. | |
| 428 void initialize(csize_t code_size, csize_t locs_size); | |
| 429 | |
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430 CodeSection* consts() { return &_consts; } |
| 0 | 431 CodeSection* insts() { return &_insts; } |
| 432 CodeSection* stubs() { return &_stubs; } | |
| 433 | |
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434 // present sections in order; return NULL at end; consts is #0, etc. |
| 0 | 435 CodeSection* code_section(int n) { |
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436 // This makes the slightly questionable but portable assumption |
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437 // that the various members (_consts, _insts, _stubs, etc.) are |
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438 // adjacent in the layout of CodeBuffer. |
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439 CodeSection* cs = &_consts + n; |
| 0 | 440 assert(cs->index() == n || !cs->is_allocated(), "sanity"); |
| 441 return cs; | |
| 442 } | |
| 443 const CodeSection* code_section(int n) const { // yucky const stuff | |
| 444 return ((CodeBuffer*)this)->code_section(n); | |
| 445 } | |
| 446 static const char* code_section_name(int n); | |
| 447 int section_index_of(address addr) const; | |
| 448 bool contains(address addr) const { | |
| 449 // handy for debugging | |
| 450 return section_index_of(addr) > SECT_NONE; | |
| 451 } | |
| 452 | |
| 453 // A stable mapping between 'locators' (small ints) and addresses. | |
| 454 static int locator_pos(int locator) { return locator >> sect_bits; } | |
| 455 static int locator_sect(int locator) { return locator & sect_mask; } | |
| 456 static int locator(int pos, int sect) { return (pos << sect_bits) | sect; } | |
| 457 int locator(address addr) const; | |
| 458 address locator_address(int locator) const; | |
| 459 | |
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460 // Heuristic for pre-packing the taken/not-taken bit of a predicted branch. |
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461 bool is_backward_branch(Label& L); |
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462 |
| 0 | 463 // Properties |
| 464 const char* name() const { return _name; } | |
| 465 CodeBuffer* before_expand() const { return _before_expand; } | |
| 466 BufferBlob* blob() const { return _blob; } | |
| 467 void set_blob(BufferBlob* blob); | |
| 468 void free_blob(); // Free the blob, if we own one. | |
| 469 | |
| 470 // Properties relative to the insts section: | |
| 1748 | 471 address insts_begin() const { return _insts.start(); } |
| 472 address insts_end() const { return _insts.end(); } | |
| 473 void set_insts_end(address end) { _insts.set_end(end); } | |
| 474 address insts_limit() const { return _insts.limit(); } | |
| 475 address insts_mark() const { return _insts.mark(); } | |
| 476 void set_insts_mark() { _insts.set_mark(); } | |
| 477 void clear_insts_mark() { _insts.clear_mark(); } | |
| 0 | 478 |
| 479 // is there anything in the buffer other than the current section? | |
| 1748 | 480 bool is_pure() const { return insts_size() == total_content_size(); } |
| 0 | 481 |
| 482 // size in bytes of output so far in the insts sections | |
| 1748 | 483 csize_t insts_size() const { return _insts.size(); } |
| 0 | 484 |
| 1748 | 485 // same as insts_size(), except that it asserts there is no non-code here |
| 486 csize_t pure_insts_size() const { assert(is_pure(), "no non-code"); | |
| 487 return insts_size(); } | |
| 0 | 488 // capacity in bytes of the insts sections |
| 1748 | 489 csize_t insts_capacity() const { return _insts.capacity(); } |
| 0 | 490 |
| 491 // number of bytes remaining in the insts section | |
| 1748 | 492 csize_t insts_remaining() const { return _insts.remaining(); } |
| 0 | 493 |
| 494 // is a given address in the insts section? (2nd version is end-inclusive) | |
| 1748 | 495 bool insts_contains(address pc) const { return _insts.contains(pc); } |
| 496 bool insts_contains2(address pc) const { return _insts.contains2(pc); } | |
| 0 | 497 |
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498 // Record any extra oops required to keep embedded metadata alive |
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499 void finalize_oop_references(methodHandle method); |
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500 |
| 1748 | 501 // Allocated size in all sections, when aligned and concatenated |
| 502 // (this is the eventual state of the content in its final | |
| 503 // CodeBlob). | |
| 504 csize_t total_content_size() const; | |
| 0 | 505 |
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506 // Combined offset (relative to start of first section) of given |
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507 // section, as eventually found in the final CodeBlob. |
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508 csize_t total_offset_of(CodeSection* cs) const; |
| 0 | 509 |
| 510 // allocated size of all relocation data, including index, rounded up | |
| 511 csize_t total_relocation_size() const; | |
| 512 | |
| 513 // allocated size of any and all recorded oops | |
| 514 csize_t total_oop_size() const { | |
| 515 OopRecorder* recorder = oop_recorder(); | |
| 516 return (recorder == NULL)? 0: recorder->oop_size(); | |
| 517 } | |
| 518 | |
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519 // allocated size of any and all recorded metadata |
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520 csize_t total_metadata_size() const { |
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521 OopRecorder* recorder = oop_recorder(); |
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522 return (recorder == NULL)? 0: recorder->metadata_size(); |
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523 } |
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524 |
| 0 | 525 // Configuration functions, called immediately after the CB is constructed. |
| 526 // The section sizes are subtracted from the original insts section. | |
| 527 // Note: Call them in reverse section order, because each steals from insts. | |
| 528 void initialize_consts_size(csize_t size) { initialize_section_size(&_consts, size); } | |
| 529 void initialize_stubs_size(csize_t size) { initialize_section_size(&_stubs, size); } | |
| 530 // Override default oop recorder. | |
| 531 void initialize_oop_recorder(OopRecorder* r); | |
| 532 | |
| 533 OopRecorder* oop_recorder() const { return _oop_recorder; } | |
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534 CodeStrings& strings() { return _strings; } |
| 0 | 535 |
| 536 // Code generation | |
| 537 void relocate(address at, RelocationHolder const& rspec, int format = 0) { | |
| 538 _insts.relocate(at, rspec, format); | |
| 539 } | |
| 540 void relocate(address at, relocInfo::relocType rtype, int format = 0) { | |
| 541 _insts.relocate(at, rtype, format); | |
| 542 } | |
| 543 | |
| 544 // Management of overflow storage for binding of Labels. | |
| 545 GrowableArray<int>* create_patch_overflow(); | |
| 546 | |
| 547 // NMethod generation | |
| 548 void copy_code_and_locs_to(CodeBlob* blob) { | |
| 549 assert(blob != NULL, "sane"); | |
| 550 copy_relocations_to(blob); | |
| 551 copy_code_to(blob); | |
| 552 } | |
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553 void copy_values_to(nmethod* nm) { |
| 0 | 554 if (!oop_recorder()->is_unused()) { |
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555 oop_recorder()->copy_values_to(nm); |
| 0 | 556 } |
| 557 } | |
| 558 | |
| 559 // Transform an address from the code in this code buffer to a specified code buffer | |
| 560 address transform_address(const CodeBuffer &cb, address addr) const; | |
| 561 | |
| 562 void block_comment(intptr_t offset, const char * comment) PRODUCT_RETURN; | |
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563 const char* code_string(const char* str) PRODUCT_RETURN_(return NULL;); |
| 0 | 564 |
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565 // Log a little info about section usage in the CodeBuffer |
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566 void log_section_sizes(const char* name); |
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567 |
| 0 | 568 #ifndef PRODUCT |
| 569 public: | |
| 570 // Printing / Decoding | |
| 571 // decodes from decode_begin() to code_end() and sets decode_begin to end | |
| 572 void decode(); | |
| 573 void decode_all(); // decodes all the code | |
| 574 void skip_decode(); // sets decode_begin to code_end(); | |
| 575 void print(); | |
| 576 #endif | |
| 577 | |
| 578 | |
| 579 // The following header contains architecture-specific implementations | |
| 1972 | 580 #ifdef TARGET_ARCH_x86 |
| 581 # include "codeBuffer_x86.hpp" | |
| 582 #endif | |
| 583 #ifdef TARGET_ARCH_sparc | |
| 584 # include "codeBuffer_sparc.hpp" | |
| 585 #endif | |
| 586 #ifdef TARGET_ARCH_zero | |
| 587 # include "codeBuffer_zero.hpp" | |
| 588 #endif | |
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589 #ifdef TARGET_ARCH_arm |
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590 # include "codeBuffer_arm.hpp" |
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591 #endif |
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592 #ifdef TARGET_ARCH_ppc |
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593 # include "codeBuffer_ppc.hpp" |
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594 #endif |
| 1972 | 595 |
| 0 | 596 }; |
| 597 | |
| 598 | |
| 599 inline void CodeSection::freeze() { | |
| 600 _outer->freeze_section(this); | |
| 601 } | |
| 602 | |
| 603 inline bool CodeSection::maybe_expand_to_ensure_remaining(csize_t amount) { | |
| 604 if (remaining() < amount) { _outer->expand(this, amount); return true; } | |
| 605 return false; | |
| 606 } | |
| 1972 | 607 |
| 608 #endif // SHARE_VM_ASM_CODEBUFFER_HPP |