Mercurial > hg > graal-compiler
annotate src/share/vm/code/relocInfo.cpp @ 14456:abec000618bf
Merge
| author | kvn |
|---|---|
| date | Tue, 28 Jan 2014 12:25:34 -0800 |
| parents | de6a9e811145 53fa76359eb1 |
| children | d8041d695d19 78bbf4d43a14 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 #include "precompiled.hpp" |
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26 #include "code/codeCache.hpp" |
| 1972 | 27 #include "code/compiledIC.hpp" |
| 28 #include "code/nmethod.hpp" | |
| 29 #include "code/relocInfo.hpp" | |
| 30 #include "memory/resourceArea.hpp" | |
| 31 #include "runtime/stubCodeGenerator.hpp" | |
| 32 #include "utilities/copy.hpp" | |
| 0 | 33 |
| 34 | |
| 35 const RelocationHolder RelocationHolder::none; // its type is relocInfo::none | |
| 36 | |
| 37 | |
| 38 // Implementation of relocInfo | |
| 39 | |
| 40 #ifdef ASSERT | |
| 41 relocInfo::relocInfo(relocType t, int off, int f) { | |
| 42 assert(t != data_prefix_tag, "cannot build a prefix this way"); | |
| 43 assert((t & type_mask) == t, "wrong type"); | |
| 44 assert((f & format_mask) == f, "wrong format"); | |
| 45 assert(off >= 0 && off < offset_limit(), "offset out off bounds"); | |
| 46 assert((off & (offset_unit-1)) == 0, "misaligned offset"); | |
| 47 (*this) = relocInfo(t, RAW_BITS, off, f); | |
| 48 } | |
| 49 #endif | |
| 50 | |
| 51 void relocInfo::initialize(CodeSection* dest, Relocation* reloc) { | |
| 52 relocInfo* data = this+1; // here's where the data might go | |
| 53 dest->set_locs_end(data); // sync end: the next call may read dest.locs_end | |
| 54 reloc->pack_data_to(dest); // maybe write data into locs, advancing locs_end | |
| 55 relocInfo* data_limit = dest->locs_end(); | |
| 56 if (data_limit > data) { | |
| 57 relocInfo suffix = (*this); | |
| 58 data_limit = this->finish_prefix((short*) data_limit); | |
| 59 // Finish up with the suffix. (Hack note: pack_data_to might edit this.) | |
| 60 *data_limit = suffix; | |
| 61 dest->set_locs_end(data_limit+1); | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 relocInfo* relocInfo::finish_prefix(short* prefix_limit) { | |
| 66 assert(sizeof(relocInfo) == sizeof(short), "change this code"); | |
| 67 short* p = (short*)(this+1); | |
| 68 assert(prefix_limit >= p, "must be a valid span of data"); | |
| 69 int plen = prefix_limit - p; | |
| 70 if (plen == 0) { | |
| 71 debug_only(_value = 0xFFFF); | |
| 72 return this; // no data: remove self completely | |
| 73 } | |
| 74 if (plen == 1 && fits_into_immediate(p[0])) { | |
| 75 (*this) = immediate_relocInfo(p[0]); // move data inside self | |
| 76 return this+1; | |
| 77 } | |
| 78 // cannot compact, so just update the count and return the limit pointer | |
| 79 (*this) = prefix_relocInfo(plen); // write new datalen | |
| 80 assert(data() + datalen() == prefix_limit, "pointers must line up"); | |
| 81 return (relocInfo*)prefix_limit; | |
| 82 } | |
| 83 | |
| 84 | |
| 85 void relocInfo::set_type(relocType t) { | |
| 86 int old_offset = addr_offset(); | |
| 87 int old_format = format(); | |
| 88 (*this) = relocInfo(t, old_offset, old_format); | |
| 89 assert(type()==(int)t, "sanity check"); | |
| 90 assert(addr_offset()==old_offset, "sanity check"); | |
| 91 assert(format()==old_format, "sanity check"); | |
| 92 } | |
| 93 | |
| 94 | |
| 95 void relocInfo::set_format(int f) { | |
| 96 int old_offset = addr_offset(); | |
| 97 assert((f & format_mask) == f, "wrong format"); | |
| 98 _value = (_value & ~(format_mask << offset_width)) | (f << offset_width); | |
| 99 assert(addr_offset()==old_offset, "sanity check"); | |
| 100 } | |
| 101 | |
| 102 | |
| 103 void relocInfo::change_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type, relocType new_type) { | |
| 104 bool found = false; | |
| 105 while (itr->next() && !found) { | |
| 106 if (itr->addr() == pc) { | |
| 107 assert(itr->type()==old_type, "wrong relocInfo type found"); | |
| 108 itr->current()->set_type(new_type); | |
| 109 found=true; | |
| 110 } | |
| 111 } | |
| 112 assert(found, "no relocInfo found for pc"); | |
| 113 } | |
| 114 | |
| 115 | |
| 116 void relocInfo::remove_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type) { | |
| 117 change_reloc_info_for_address(itr, pc, old_type, none); | |
| 118 } | |
| 119 | |
| 120 | |
| 121 // ---------------------------------------------------------------------------------------------------- | |
| 122 // Implementation of RelocIterator | |
| 123 | |
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124 void RelocIterator::initialize(nmethod* nm, address begin, address limit) { |
| 0 | 125 initialize_misc(); |
| 126 | |
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127 if (nm == NULL && begin != NULL) { |
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128 // allow nmethod to be deduced from beginning address |
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129 CodeBlob* cb = CodeCache::find_blob(begin); |
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130 nm = cb->as_nmethod_or_null(); |
| 0 | 131 } |
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132 assert(nm != NULL, "must be able to deduce nmethod from other arguments"); |
| 0 | 133 |
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134 _code = nm; |
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135 _current = nm->relocation_begin() - 1; |
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136 _end = nm->relocation_end(); |
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137 _addr = nm->content_begin(); |
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138 |
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139 // Initialize code sections. |
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140 _section_start[CodeBuffer::SECT_CONSTS] = nm->consts_begin(); |
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141 _section_start[CodeBuffer::SECT_INSTS ] = nm->insts_begin() ; |
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142 _section_start[CodeBuffer::SECT_STUBS ] = nm->stub_begin() ; |
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143 |
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144 _section_end [CodeBuffer::SECT_CONSTS] = nm->consts_end() ; |
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145 _section_end [CodeBuffer::SECT_INSTS ] = nm->insts_end() ; |
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146 _section_end [CodeBuffer::SECT_STUBS ] = nm->stub_end() ; |
| 0 | 147 |
| 148 assert(!has_current(), "just checking"); | |
| 1748 | 149 assert(begin == NULL || begin >= nm->code_begin(), "in bounds"); |
| 150 assert(limit == NULL || limit <= nm->code_end(), "in bounds"); | |
| 0 | 151 set_limits(begin, limit); |
| 152 } | |
| 153 | |
| 154 | |
| 155 RelocIterator::RelocIterator(CodeSection* cs, address begin, address limit) { | |
| 156 initialize_misc(); | |
| 157 | |
| 158 _current = cs->locs_start()-1; | |
| 159 _end = cs->locs_end(); | |
| 160 _addr = cs->start(); | |
| 161 _code = NULL; // Not cb->blob(); | |
| 162 | |
| 163 CodeBuffer* cb = cs->outer(); | |
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164 assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal"); |
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165 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) { |
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166 CodeSection* cs = cb->code_section(n); |
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167 _section_start[n] = cs->start(); |
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168 _section_end [n] = cs->end(); |
| 0 | 169 } |
| 170 | |
| 171 assert(!has_current(), "just checking"); | |
| 172 | |
| 173 assert(begin == NULL || begin >= cs->start(), "in bounds"); | |
| 174 assert(limit == NULL || limit <= cs->end(), "in bounds"); | |
| 175 set_limits(begin, limit); | |
| 176 } | |
| 177 | |
| 178 | |
| 179 enum { indexCardSize = 128 }; | |
| 180 struct RelocIndexEntry { | |
| 181 jint addr_offset; // offset from header_end of an addr() | |
| 182 jint reloc_offset; // offset from header_end of a relocInfo (prefix) | |
| 183 }; | |
| 184 | |
| 185 | |
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186 bool RelocIterator::addr_in_const() const { |
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187 const int n = CodeBuffer::SECT_CONSTS; |
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188 return section_start(n) <= addr() && addr() < section_end(n); |
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189 } |
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190 |
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191 |
| 0 | 192 static inline int num_cards(int code_size) { |
| 193 return (code_size-1) / indexCardSize; | |
| 194 } | |
| 195 | |
| 196 | |
| 197 int RelocIterator::locs_and_index_size(int code_size, int locs_size) { | |
| 198 if (!UseRelocIndex) return locs_size; // no index | |
| 199 code_size = round_to(code_size, oopSize); | |
| 200 locs_size = round_to(locs_size, oopSize); | |
| 201 int index_size = num_cards(code_size) * sizeof(RelocIndexEntry); | |
| 202 // format of indexed relocs: | |
| 203 // relocation_begin: relocInfo ... | |
| 204 // index: (addr,reloc#) ... | |
| 205 // indexSize :relocation_end | |
| 206 return locs_size + index_size + BytesPerInt; | |
| 207 } | |
| 208 | |
| 209 | |
| 210 void RelocIterator::create_index(relocInfo* dest_begin, int dest_count, relocInfo* dest_end) { | |
| 211 address relocation_begin = (address)dest_begin; | |
| 212 address relocation_end = (address)dest_end; | |
| 213 int total_size = relocation_end - relocation_begin; | |
| 214 int locs_size = dest_count * sizeof(relocInfo); | |
| 215 if (!UseRelocIndex) { | |
| 216 Copy::fill_to_bytes(relocation_begin + locs_size, total_size-locs_size, 0); | |
| 217 return; | |
| 218 } | |
| 219 int index_size = total_size - locs_size - BytesPerInt; // find out how much space is left | |
| 220 int ncards = index_size / sizeof(RelocIndexEntry); | |
| 221 assert(total_size == locs_size + index_size + BytesPerInt, "checkin'"); | |
| 222 assert(index_size >= 0 && index_size % sizeof(RelocIndexEntry) == 0, "checkin'"); | |
| 223 jint* index_size_addr = (jint*)relocation_end - 1; | |
| 224 | |
| 225 assert(sizeof(jint) == BytesPerInt, "change this code"); | |
| 226 | |
| 227 *index_size_addr = index_size; | |
| 228 if (index_size != 0) { | |
| 229 assert(index_size > 0, "checkin'"); | |
| 230 | |
| 231 RelocIndexEntry* index = (RelocIndexEntry *)(relocation_begin + locs_size); | |
| 232 assert(index == (RelocIndexEntry*)index_size_addr - ncards, "checkin'"); | |
| 233 | |
| 234 // walk over the relocations, and fill in index entries as we go | |
| 235 RelocIterator iter; | |
| 236 const address initial_addr = NULL; | |
| 237 relocInfo* const initial_current = dest_begin - 1; // biased by -1 like elsewhere | |
| 238 | |
| 239 iter._code = NULL; | |
| 240 iter._addr = initial_addr; | |
| 241 iter._limit = (address)(intptr_t)(ncards * indexCardSize); | |
| 242 iter._current = initial_current; | |
| 243 iter._end = dest_begin + dest_count; | |
| 244 | |
| 245 int i = 0; | |
| 246 address next_card_addr = (address)indexCardSize; | |
| 247 int addr_offset = 0; | |
| 248 int reloc_offset = 0; | |
| 249 while (true) { | |
| 250 // Checkpoint the iterator before advancing it. | |
| 251 addr_offset = iter._addr - initial_addr; | |
| 252 reloc_offset = iter._current - initial_current; | |
| 253 if (!iter.next()) break; | |
| 254 while (iter.addr() >= next_card_addr) { | |
| 255 index[i].addr_offset = addr_offset; | |
| 256 index[i].reloc_offset = reloc_offset; | |
| 257 i++; | |
| 258 next_card_addr += indexCardSize; | |
| 259 } | |
| 260 } | |
| 261 while (i < ncards) { | |
| 262 index[i].addr_offset = addr_offset; | |
| 263 index[i].reloc_offset = reloc_offset; | |
| 264 i++; | |
| 265 } | |
| 266 } | |
| 267 } | |
| 268 | |
| 269 | |
| 270 void RelocIterator::set_limits(address begin, address limit) { | |
| 271 int index_size = 0; | |
| 272 if (UseRelocIndex && _code != NULL) { | |
| 273 index_size = ((jint*)_end)[-1]; | |
| 274 _end = (relocInfo*)( (address)_end - index_size - BytesPerInt ); | |
| 275 } | |
| 276 | |
| 277 _limit = limit; | |
| 278 | |
| 279 // the limit affects this next stuff: | |
| 280 if (begin != NULL) { | |
| 281 #ifdef ASSERT | |
| 282 // In ASSERT mode we do not actually use the index, but simply | |
| 283 // check that its contents would have led us to the right answer. | |
| 284 address addrCheck = _addr; | |
| 285 relocInfo* infoCheck = _current; | |
| 286 #endif // ASSERT | |
| 287 if (index_size > 0) { | |
| 288 // skip ahead | |
| 289 RelocIndexEntry* index = (RelocIndexEntry*)_end; | |
| 290 RelocIndexEntry* index_limit = (RelocIndexEntry*)((address)index + index_size); | |
| 1748 | 291 assert(_addr == _code->code_begin(), "_addr must be unadjusted"); |
| 0 | 292 int card = (begin - _addr) / indexCardSize; |
| 293 if (card > 0) { | |
| 294 if (index+card-1 < index_limit) index += card-1; | |
| 295 else index = index_limit - 1; | |
| 296 #ifdef ASSERT | |
| 297 addrCheck = _addr + index->addr_offset; | |
| 298 infoCheck = _current + index->reloc_offset; | |
| 299 #else | |
| 300 // Advance the iterator immediately to the last valid state | |
| 301 // for the previous card. Calling "next" will then advance | |
| 302 // it to the first item on the required card. | |
| 303 _addr += index->addr_offset; | |
| 304 _current += index->reloc_offset; | |
| 305 #endif // ASSERT | |
| 306 } | |
| 307 } | |
| 308 | |
| 309 relocInfo* backup; | |
| 310 address backup_addr; | |
| 311 while (true) { | |
| 312 backup = _current; | |
| 313 backup_addr = _addr; | |
| 314 #ifdef ASSERT | |
| 315 if (backup == infoCheck) { | |
| 316 assert(backup_addr == addrCheck, "must match"); addrCheck = NULL; infoCheck = NULL; | |
| 317 } else { | |
| 318 assert(addrCheck == NULL || backup_addr <= addrCheck, "must not pass addrCheck"); | |
| 319 } | |
| 320 #endif // ASSERT | |
| 321 if (!next() || addr() >= begin) break; | |
| 322 } | |
| 323 assert(addrCheck == NULL || addrCheck == backup_addr, "must have matched addrCheck"); | |
| 324 assert(infoCheck == NULL || infoCheck == backup, "must have matched infoCheck"); | |
| 325 // At this point, either we are at the first matching record, | |
| 326 // or else there is no such record, and !has_current(). | |
| 327 // In either case, revert to the immediatly preceding state. | |
| 328 _current = backup; | |
| 329 _addr = backup_addr; | |
| 330 set_has_current(false); | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 | |
| 335 void RelocIterator::set_limit(address limit) { | |
| 336 address code_end = (address)code() + code()->size(); | |
| 337 assert(limit == NULL || limit <= code_end, "in bounds"); | |
| 338 _limit = limit; | |
| 339 } | |
| 340 | |
| 341 // All the strange bit-encodings are in here. | |
| 342 // The idea is to encode relocation data which are small integers | |
| 343 // very efficiently (a single extra halfword). Larger chunks of | |
| 344 // relocation data need a halfword header to hold their size. | |
| 345 void RelocIterator::advance_over_prefix() { | |
| 346 if (_current->is_datalen()) { | |
| 347 _data = (short*) _current->data(); | |
| 348 _datalen = _current->datalen(); | |
| 349 _current += _datalen + 1; // skip the embedded data & header | |
| 350 } else { | |
| 351 _databuf = _current->immediate(); | |
| 352 _data = &_databuf; | |
| 353 _datalen = 1; | |
| 354 _current++; // skip the header | |
| 355 } | |
| 356 // The client will see the following relocInfo, whatever that is. | |
| 357 // It is the reloc to which the preceding data applies. | |
| 358 } | |
| 359 | |
| 360 | |
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361 void RelocIterator::initialize_misc() { |
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362 set_has_current(false); |
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363 for (int i = (int) CodeBuffer::SECT_FIRST; i < (int) CodeBuffer::SECT_LIMIT; i++) { |
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364 _section_start[i] = NULL; // these will be lazily computed, if needed |
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365 _section_end [i] = NULL; |
| 0 | 366 } |
| 367 } | |
| 368 | |
| 369 | |
| 370 Relocation* RelocIterator::reloc() { | |
| 371 // (take the "switch" out-of-line) | |
| 372 relocInfo::relocType t = type(); | |
| 373 if (false) {} | |
| 374 #define EACH_TYPE(name) \ | |
| 375 else if (t == relocInfo::name##_type) { \ | |
| 376 return name##_reloc(); \ | |
| 377 } | |
| 378 APPLY_TO_RELOCATIONS(EACH_TYPE); | |
| 379 #undef EACH_TYPE | |
| 380 assert(t == relocInfo::none, "must be padding"); | |
| 381 return new(_rh) Relocation(); | |
| 382 } | |
| 383 | |
| 384 | |
| 385 //////// Methods for flyweight Relocation types | |
| 386 | |
| 387 | |
| 388 RelocationHolder RelocationHolder::plus(int offset) const { | |
| 389 if (offset != 0) { | |
| 390 switch (type()) { | |
| 391 case relocInfo::none: | |
| 392 break; | |
| 393 case relocInfo::oop_type: | |
| 394 { | |
| 395 oop_Relocation* r = (oop_Relocation*)reloc(); | |
| 396 return oop_Relocation::spec(r->oop_index(), r->offset() + offset); | |
| 397 } | |
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398 case relocInfo::metadata_type: |
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399 { |
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400 metadata_Relocation* r = (metadata_Relocation*)reloc(); |
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401 return metadata_Relocation::spec(r->metadata_index(), r->offset() + offset); |
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402 } |
| 0 | 403 default: |
| 404 ShouldNotReachHere(); | |
| 405 } | |
| 406 } | |
| 407 return (*this); | |
| 408 } | |
| 409 | |
| 410 | |
| 411 void Relocation::guarantee_size() { | |
| 412 guarantee(false, "Make _relocbuf bigger!"); | |
| 413 } | |
| 414 | |
| 415 // some relocations can compute their own values | |
| 416 address Relocation::value() { | |
| 417 ShouldNotReachHere(); | |
| 418 return NULL; | |
| 419 } | |
| 420 | |
| 421 | |
| 422 void Relocation::set_value(address x) { | |
| 423 ShouldNotReachHere(); | |
| 424 } | |
| 425 | |
| 426 | |
| 427 RelocationHolder Relocation::spec_simple(relocInfo::relocType rtype) { | |
| 428 if (rtype == relocInfo::none) return RelocationHolder::none; | |
| 429 relocInfo ri = relocInfo(rtype, 0); | |
| 430 RelocIterator itr; | |
| 431 itr.set_current(ri); | |
| 432 itr.reloc(); | |
| 433 return itr._rh; | |
| 434 } | |
| 435 | |
| 436 int32_t Relocation::runtime_address_to_index(address runtime_address) { | |
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437 assert(!is_reloc_index((intptr_t)runtime_address), "must not look like an index"); |
| 0 | 438 |
| 439 if (runtime_address == NULL) return 0; | |
| 440 | |
| 441 StubCodeDesc* p = StubCodeDesc::desc_for(runtime_address); | |
| 442 if (p != NULL && p->begin() == runtime_address) { | |
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443 assert(is_reloc_index(p->index()), "there must not be too many stubs"); |
| 0 | 444 return (int32_t)p->index(); |
| 445 } else { | |
| 446 // Known "miscellaneous" non-stub pointers: | |
| 447 // os::get_polling_page(), SafepointSynchronize::address_of_state() | |
| 448 if (PrintRelocations) { | |
| 449 tty->print_cr("random unregistered address in relocInfo: " INTPTR_FORMAT, runtime_address); | |
| 450 } | |
| 451 #ifndef _LP64 | |
| 452 return (int32_t) (intptr_t)runtime_address; | |
| 453 #else | |
| 454 // didn't fit return non-index | |
| 455 return -1; | |
| 456 #endif /* _LP64 */ | |
| 457 } | |
| 458 } | |
| 459 | |
| 460 | |
| 461 address Relocation::index_to_runtime_address(int32_t index) { | |
| 462 if (index == 0) return NULL; | |
| 463 | |
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464 if (is_reloc_index(index)) { |
| 0 | 465 StubCodeDesc* p = StubCodeDesc::desc_for_index(index); |
| 466 assert(p != NULL, "there must be a stub for this index"); | |
| 467 return p->begin(); | |
| 468 } else { | |
| 469 #ifndef _LP64 | |
| 470 // this only works on 32bit machines | |
| 471 return (address) ((intptr_t) index); | |
| 472 #else | |
| 473 fatal("Relocation::index_to_runtime_address, int32_t not pointer sized"); | |
| 474 return NULL; | |
| 475 #endif /* _LP64 */ | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 address Relocation::old_addr_for(address newa, | |
| 480 const CodeBuffer* src, CodeBuffer* dest) { | |
| 481 int sect = dest->section_index_of(newa); | |
| 482 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
| 483 address ostart = src->code_section(sect)->start(); | |
| 484 address nstart = dest->code_section(sect)->start(); | |
| 485 return ostart + (newa - nstart); | |
| 486 } | |
| 487 | |
| 488 address Relocation::new_addr_for(address olda, | |
| 489 const CodeBuffer* src, CodeBuffer* dest) { | |
| 490 debug_only(const CodeBuffer* src0 = src); | |
| 491 int sect = CodeBuffer::SECT_NONE; | |
| 492 // Look for olda in the source buffer, and all previous incarnations | |
| 493 // if the source buffer has been expanded. | |
| 494 for (; src != NULL; src = src->before_expand()) { | |
| 495 sect = src->section_index_of(olda); | |
| 496 if (sect != CodeBuffer::SECT_NONE) break; | |
| 497 } | |
| 498 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
| 499 address ostart = src->code_section(sect)->start(); | |
| 500 address nstart = dest->code_section(sect)->start(); | |
| 501 return nstart + (olda - ostart); | |
| 502 } | |
| 503 | |
| 504 void Relocation::normalize_address(address& addr, const CodeSection* dest, bool allow_other_sections) { | |
| 505 address addr0 = addr; | |
| 506 if (addr0 == NULL || dest->allocates2(addr0)) return; | |
| 507 CodeBuffer* cb = dest->outer(); | |
| 508 addr = new_addr_for(addr0, cb, cb); | |
| 509 assert(allow_other_sections || dest->contains2(addr), | |
| 510 "addr must be in required section"); | |
| 511 } | |
| 512 | |
| 513 | |
| 514 void CallRelocation::set_destination(address x) { | |
| 515 pd_set_call_destination(x); | |
| 516 } | |
| 517 | |
| 518 void CallRelocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 519 // Usually a self-relative reference to an external routine. | |
| 520 // On some platforms, the reference is absolute (not self-relative). | |
| 521 // The enhanced use of pd_call_destination sorts this all out. | |
| 522 address orig_addr = old_addr_for(addr(), src, dest); | |
| 523 address callee = pd_call_destination(orig_addr); | |
| 524 // Reassert the callee address, this time in the new copy of the code. | |
| 525 pd_set_call_destination(callee); | |
| 526 } | |
| 527 | |
| 528 | |
| 529 //// pack/unpack methods | |
| 530 | |
| 531 void oop_Relocation::pack_data_to(CodeSection* dest) { | |
| 532 short* p = (short*) dest->locs_end(); | |
| 533 p = pack_2_ints_to(p, _oop_index, _offset); | |
| 534 dest->set_locs_end((relocInfo*) p); | |
| 535 } | |
| 536 | |
| 537 | |
| 538 void oop_Relocation::unpack_data() { | |
| 539 unpack_2_ints(_oop_index, _offset); | |
| 540 } | |
| 541 | |
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542 void metadata_Relocation::pack_data_to(CodeSection* dest) { |
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543 short* p = (short*) dest->locs_end(); |
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544 p = pack_2_ints_to(p, _metadata_index, _offset); |
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545 dest->set_locs_end((relocInfo*) p); |
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546 } |
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547 |
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548 |
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549 void metadata_Relocation::unpack_data() { |
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550 unpack_2_ints(_metadata_index, _offset); |
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551 } |
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552 |
| 0 | 553 |
| 554 void virtual_call_Relocation::pack_data_to(CodeSection* dest) { | |
| 555 short* p = (short*) dest->locs_end(); | |
| 556 address point = dest->locs_point(); | |
| 557 | |
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558 normalize_address(_cached_value, dest); |
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559 jint x0 = scaled_offset_null_special(_cached_value, point); |
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560 p = pack_1_int_to(p, x0); |
| 0 | 561 dest->set_locs_end((relocInfo*) p); |
| 562 } | |
| 563 | |
| 564 | |
| 565 void virtual_call_Relocation::unpack_data() { | |
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566 jint x0 = unpack_1_int(); |
| 0 | 567 address point = addr(); |
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568 _cached_value = x0==0? NULL: address_from_scaled_offset(x0, point); |
| 0 | 569 } |
| 570 | |
| 571 | |
| 572 void static_stub_Relocation::pack_data_to(CodeSection* dest) { | |
| 573 short* p = (short*) dest->locs_end(); | |
| 574 CodeSection* insts = dest->outer()->insts(); | |
| 575 normalize_address(_static_call, insts); | |
| 576 p = pack_1_int_to(p, scaled_offset(_static_call, insts->start())); | |
| 577 dest->set_locs_end((relocInfo*) p); | |
| 578 } | |
| 579 | |
| 580 void static_stub_Relocation::unpack_data() { | |
| 581 address base = binding()->section_start(CodeBuffer::SECT_INSTS); | |
| 582 _static_call = address_from_scaled_offset(unpack_1_int(), base); | |
| 583 } | |
| 584 | |
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585 void trampoline_stub_Relocation::pack_data_to(CodeSection* dest ) { |
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586 short* p = (short*) dest->locs_end(); |
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587 CodeSection* insts = dest->outer()->insts(); |
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588 normalize_address(_owner, insts); |
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589 p = pack_1_int_to(p, scaled_offset(_owner, insts->start())); |
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590 dest->set_locs_end((relocInfo*) p); |
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591 } |
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592 |
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593 void trampoline_stub_Relocation::unpack_data() { |
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594 address base = binding()->section_start(CodeBuffer::SECT_INSTS); |
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595 _owner = address_from_scaled_offset(unpack_1_int(), base); |
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596 } |
| 0 | 597 |
| 598 void external_word_Relocation::pack_data_to(CodeSection* dest) { | |
| 599 short* p = (short*) dest->locs_end(); | |
| 600 int32_t index = runtime_address_to_index(_target); | |
| 601 #ifndef _LP64 | |
| 602 p = pack_1_int_to(p, index); | |
| 603 #else | |
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604 if (is_reloc_index(index)) { |
| 0 | 605 p = pack_2_ints_to(p, index, 0); |
| 606 } else { | |
| 607 jlong t = (jlong) _target; | |
| 608 int32_t lo = low(t); | |
| 609 int32_t hi = high(t); | |
| 610 p = pack_2_ints_to(p, lo, hi); | |
| 611 DEBUG_ONLY(jlong t1 = jlong_from(hi, lo)); | |
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612 assert(!is_reloc_index(t1) && (address) t1 == _target, "not symmetric"); |
| 0 | 613 } |
| 614 #endif /* _LP64 */ | |
| 615 dest->set_locs_end((relocInfo*) p); | |
| 616 } | |
| 617 | |
| 618 | |
| 619 void external_word_Relocation::unpack_data() { | |
| 620 #ifndef _LP64 | |
| 621 _target = index_to_runtime_address(unpack_1_int()); | |
| 622 #else | |
| 623 int32_t lo, hi; | |
| 624 unpack_2_ints(lo, hi); | |
| 625 jlong t = jlong_from(hi, lo);; | |
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626 if (is_reloc_index(t)) { |
| 0 | 627 _target = index_to_runtime_address(t); |
| 628 } else { | |
| 629 _target = (address) t; | |
| 630 } | |
| 631 #endif /* _LP64 */ | |
| 632 } | |
| 633 | |
| 634 | |
| 635 void internal_word_Relocation::pack_data_to(CodeSection* dest) { | |
| 636 short* p = (short*) dest->locs_end(); | |
| 637 normalize_address(_target, dest, true); | |
| 638 | |
| 639 // Check whether my target address is valid within this section. | |
| 640 // If not, strengthen the relocation type to point to another section. | |
| 641 int sindex = _section; | |
| 642 if (sindex == CodeBuffer::SECT_NONE && _target != NULL | |
| 643 && (!dest->allocates(_target) || _target == dest->locs_point())) { | |
| 644 sindex = dest->outer()->section_index_of(_target); | |
| 645 guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere"); | |
| 646 relocInfo* base = dest->locs_end() - 1; | |
| 647 assert(base->type() == this->type(), "sanity"); | |
| 648 // Change the written type, to be section_word_type instead. | |
| 649 base->set_type(relocInfo::section_word_type); | |
| 650 } | |
| 651 | |
| 652 // Note: An internal_word relocation cannot refer to its own instruction, | |
| 653 // because we reserve "0" to mean that the pointer itself is embedded | |
| 654 // in the code stream. We use a section_word relocation for such cases. | |
| 655 | |
| 656 if (sindex == CodeBuffer::SECT_NONE) { | |
| 657 assert(type() == relocInfo::internal_word_type, "must be base class"); | |
| 658 guarantee(_target == NULL || dest->allocates2(_target), "must be within the given code section"); | |
| 659 jint x0 = scaled_offset_null_special(_target, dest->locs_point()); | |
| 660 assert(!(x0 == 0 && _target != NULL), "correct encoding of null target"); | |
| 661 p = pack_1_int_to(p, x0); | |
| 662 } else { | |
| 663 assert(_target != NULL, "sanity"); | |
| 664 CodeSection* sect = dest->outer()->code_section(sindex); | |
| 665 guarantee(sect->allocates2(_target), "must be in correct section"); | |
| 666 address base = sect->start(); | |
| 667 jint offset = scaled_offset(_target, base); | |
| 668 assert((uint)sindex < (uint)CodeBuffer::SECT_LIMIT, "sanity"); | |
| 669 assert(CodeBuffer::SECT_LIMIT <= (1 << section_width), "section_width++"); | |
| 670 p = pack_1_int_to(p, (offset << section_width) | sindex); | |
| 671 } | |
| 672 | |
| 673 dest->set_locs_end((relocInfo*) p); | |
| 674 } | |
| 675 | |
| 676 | |
| 677 void internal_word_Relocation::unpack_data() { | |
| 678 jint x0 = unpack_1_int(); | |
| 679 _target = x0==0? NULL: address_from_scaled_offset(x0, addr()); | |
| 680 _section = CodeBuffer::SECT_NONE; | |
| 681 } | |
| 682 | |
| 683 | |
| 684 void section_word_Relocation::unpack_data() { | |
| 685 jint x = unpack_1_int(); | |
| 686 jint offset = (x >> section_width); | |
| 687 int sindex = (x & ((1<<section_width)-1)); | |
| 688 address base = binding()->section_start(sindex); | |
| 689 | |
| 690 _section = sindex; | |
| 691 _target = address_from_scaled_offset(offset, base); | |
| 692 } | |
| 693 | |
| 694 //// miscellaneous methods | |
| 695 oop* oop_Relocation::oop_addr() { | |
| 696 int n = _oop_index; | |
| 697 if (n == 0) { | |
| 698 // oop is stored in the code stream | |
| 699 return (oop*) pd_address_in_code(); | |
| 700 } else { | |
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701 // oop is stored in table at nmethod::oops_begin |
| 0 | 702 return code()->oop_addr_at(n); |
| 703 } | |
| 704 } | |
| 705 | |
| 706 | |
| 707 oop oop_Relocation::oop_value() { | |
| 708 oop v = *oop_addr(); | |
| 709 // clean inline caches store a special pseudo-null | |
| 710 if (v == (oop)Universe::non_oop_word()) v = NULL; | |
| 711 return v; | |
| 712 } | |
| 713 | |
| 714 | |
| 715 void oop_Relocation::fix_oop_relocation() { | |
| 716 if (!oop_is_immediate()) { | |
| 717 // get the oop from the pool, and re-insert it into the instruction: | |
| 718 set_value(value()); | |
| 719 } | |
| 720 } | |
| 721 | |
| 722 | |
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723 void oop_Relocation::verify_oop_relocation() { |
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724 if (!oop_is_immediate()) { |
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725 // get the oop from the pool, and re-insert it into the instruction: |
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726 verify_value(value()); |
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727 } |
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728 } |
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729 |
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730 // meta data versions |
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731 Metadata** metadata_Relocation::metadata_addr() { |
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732 int n = _metadata_index; |
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733 if (n == 0) { |
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734 // metadata is stored in the code stream |
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735 return (Metadata**) pd_address_in_code(); |
| 0 | 736 } else { |
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737 // metadata is stored in table at nmethod::metadatas_begin |
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738 return code()->metadata_addr_at(n); |
| 0 | 739 } |
| 740 } | |
| 741 | |
| 742 | |
|
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743 Metadata* metadata_Relocation::metadata_value() { |
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744 Metadata* v = *metadata_addr(); |
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745 // clean inline caches store a special pseudo-null |
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746 if (v == (Metadata*)Universe::non_oop_word()) v = NULL; |
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747 return v; |
| 0 | 748 } |
| 749 | |
|
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750 |
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751 void metadata_Relocation::fix_metadata_relocation() { |
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752 if (!metadata_is_immediate()) { |
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753 // get the metadata from the pool, and re-insert it into the instruction: |
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754 pd_fix_value(value()); |
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755 } |
| 0 | 756 } |
| 757 | |
| 758 | |
|
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759 void metadata_Relocation::verify_metadata_relocation() { |
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760 if (!metadata_is_immediate()) { |
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761 // get the metadata from the pool, and re-insert it into the instruction: |
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762 verify_value(value()); |
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763 } |
| 0 | 764 } |
| 765 | |
|
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766 address virtual_call_Relocation::cached_value() { |
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767 assert(_cached_value != NULL && _cached_value < addr(), "must precede ic_call"); |
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768 return _cached_value; |
| 0 | 769 } |
| 770 | |
| 771 | |
| 772 void virtual_call_Relocation::clear_inline_cache() { | |
| 773 // No stubs for ICs | |
| 774 // Clean IC | |
| 775 ResourceMark rm; | |
| 776 CompiledIC* icache = CompiledIC_at(this); | |
| 777 icache->set_to_clean(); | |
| 778 } | |
| 779 | |
| 780 | |
| 781 void opt_virtual_call_Relocation::clear_inline_cache() { | |
| 782 // No stubs for ICs | |
| 783 // Clean IC | |
| 784 ResourceMark rm; | |
| 785 CompiledIC* icache = CompiledIC_at(this); | |
| 786 icache->set_to_clean(); | |
| 787 } | |
| 788 | |
| 789 | |
| 790 address opt_virtual_call_Relocation::static_stub() { | |
| 791 // search for the static stub who points back to this static call | |
| 792 address static_call_addr = addr(); | |
| 793 RelocIterator iter(code()); | |
| 794 while (iter.next()) { | |
| 795 if (iter.type() == relocInfo::static_stub_type) { | |
| 796 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
| 797 return iter.addr(); | |
| 798 } | |
| 799 } | |
| 800 } | |
| 801 return NULL; | |
| 802 } | |
| 803 | |
| 804 | |
| 805 void static_call_Relocation::clear_inline_cache() { | |
| 806 // Safe call site info | |
| 807 CompiledStaticCall* handler = compiledStaticCall_at(this); | |
| 808 handler->set_to_clean(); | |
| 809 } | |
| 810 | |
| 811 | |
| 812 address static_call_Relocation::static_stub() { | |
| 813 // search for the static stub who points back to this static call | |
| 814 address static_call_addr = addr(); | |
| 815 RelocIterator iter(code()); | |
| 816 while (iter.next()) { | |
| 817 if (iter.type() == relocInfo::static_stub_type) { | |
| 818 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
| 819 return iter.addr(); | |
| 820 } | |
| 821 } | |
| 822 } | |
| 823 return NULL; | |
| 824 } | |
| 825 | |
|
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826 // Finds the trampoline address for a call. If no trampoline stub is |
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827 // found NULL is returned which can be handled by the caller. |
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828 address trampoline_stub_Relocation::get_trampoline_for(address call, nmethod* code) { |
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829 // There are no relocations available when the code gets relocated |
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830 // because of CodeBuffer expansion. |
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831 if (code->relocation_size() == 0) |
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832 return NULL; |
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833 |
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834 RelocIterator iter(code, call); |
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835 while (iter.next()) { |
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836 if (iter.type() == relocInfo::trampoline_stub_type) { |
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837 if (iter.trampoline_stub_reloc()->owner() == call) { |
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838 return iter.addr(); |
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839 } |
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840 } |
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841 } |
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842 |
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843 return NULL; |
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844 } |
| 0 | 845 |
| 846 void static_stub_Relocation::clear_inline_cache() { | |
| 847 // Call stub is only used when calling the interpreted code. | |
| 848 // It does not really need to be cleared, except that we want to clean out the methodoop. | |
| 849 CompiledStaticCall::set_stub_to_clean(this); | |
| 850 } | |
| 851 | |
| 852 | |
| 853 void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 854 address target = _target; | |
| 855 if (target == NULL) { | |
| 856 // An absolute embedded reference to an external location, | |
| 857 // which means there is nothing to fix here. | |
| 858 return; | |
| 859 } | |
| 860 // Probably this reference is absolute, not relative, so the | |
| 861 // following is probably a no-op. | |
| 862 assert(src->section_index_of(target) == CodeBuffer::SECT_NONE, "sanity"); | |
| 863 set_value(target); | |
| 864 } | |
| 865 | |
| 866 | |
| 867 address external_word_Relocation::target() { | |
| 868 address target = _target; | |
| 869 if (target == NULL) { | |
| 870 target = pd_get_address_from_code(); | |
| 871 } | |
| 872 return target; | |
| 873 } | |
| 874 | |
| 875 | |
| 876 void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 877 address target = _target; | |
| 878 if (target == NULL) { | |
| 879 if (addr_in_const()) { | |
| 880 target = new_addr_for(*(address*)addr(), src, dest); | |
| 881 } else { | |
| 882 target = new_addr_for(pd_get_address_from_code(), src, dest); | |
| 883 } | |
| 884 } | |
| 885 set_value(target); | |
| 886 } | |
| 887 | |
| 888 | |
| 889 address internal_word_Relocation::target() { | |
| 890 address target = _target; | |
| 891 if (target == NULL) { | |
| 892 target = pd_get_address_from_code(); | |
| 893 } | |
| 894 return target; | |
| 895 } | |
| 896 | |
| 897 //--------------------------------------------------------------------------------- | |
| 898 // Non-product code | |
| 899 | |
| 900 #ifndef PRODUCT | |
| 901 | |
| 902 static const char* reloc_type_string(relocInfo::relocType t) { | |
| 903 switch (t) { | |
| 904 #define EACH_CASE(name) \ | |
| 905 case relocInfo::name##_type: \ | |
| 906 return #name; | |
| 907 | |
| 908 APPLY_TO_RELOCATIONS(EACH_CASE); | |
| 909 #undef EACH_CASE | |
| 910 | |
| 911 case relocInfo::none: | |
| 912 return "none"; | |
| 913 case relocInfo::data_prefix_tag: | |
| 914 return "prefix"; | |
| 915 default: | |
| 916 return "UNKNOWN RELOC TYPE"; | |
| 917 } | |
| 918 } | |
| 919 | |
| 920 | |
| 921 void RelocIterator::print_current() { | |
| 922 if (!has_current()) { | |
| 923 tty->print_cr("(no relocs)"); | |
| 924 return; | |
| 925 } | |
| 2002 | 926 tty->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT " offset=%d", |
| 927 _current, type(), reloc_type_string((relocInfo::relocType) type()), _addr, _current->addr_offset()); | |
| 0 | 928 if (current()->format() != 0) |
| 929 tty->print(" format=%d", current()->format()); | |
| 930 if (datalen() == 1) { | |
| 931 tty->print(" data=%d", data()[0]); | |
| 932 } else if (datalen() > 0) { | |
| 933 tty->print(" data={"); | |
| 934 for (int i = 0; i < datalen(); i++) { | |
| 935 tty->print("%04x", data()[i] & 0xFFFF); | |
| 936 } | |
| 937 tty->print("}"); | |
| 938 } | |
| 939 tty->print("]"); | |
| 940 switch (type()) { | |
| 941 case relocInfo::oop_type: | |
| 942 { | |
| 943 oop_Relocation* r = oop_reloc(); | |
| 944 oop* oop_addr = NULL; | |
| 945 oop raw_oop = NULL; | |
| 946 oop oop_value = NULL; | |
| 947 if (code() != NULL || r->oop_is_immediate()) { | |
| 948 oop_addr = r->oop_addr(); | |
| 949 raw_oop = *oop_addr; | |
| 950 oop_value = r->oop_value(); | |
| 951 } | |
| 952 tty->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", | |
| 953 oop_addr, (address)raw_oop, r->offset()); | |
| 954 // Do not print the oop by default--we want this routine to | |
| 955 // work even during GC or other inconvenient times. | |
| 956 if (WizardMode && oop_value != NULL) { | |
| 957 tty->print("oop_value=" INTPTR_FORMAT ": ", (address)oop_value); | |
| 958 oop_value->print_value_on(tty); | |
| 959 } | |
| 960 break; | |
| 961 } | |
|
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962 case relocInfo::metadata_type: |
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963 { |
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964 metadata_Relocation* r = metadata_reloc(); |
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965 Metadata** metadata_addr = NULL; |
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966 Metadata* raw_metadata = NULL; |
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967 Metadata* metadata_value = NULL; |
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968 if (code() != NULL || r->metadata_is_immediate()) { |
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969 metadata_addr = r->metadata_addr(); |
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970 raw_metadata = *metadata_addr; |
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971 metadata_value = r->metadata_value(); |
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972 } |
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973 tty->print(" | [metadata_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", |
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974 metadata_addr, (address)raw_metadata, r->offset()); |
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975 if (metadata_value != NULL) { |
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976 tty->print("metadata_value=" INTPTR_FORMAT ": ", (address)metadata_value); |
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977 metadata_value->print_value_on(tty); |
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978 } |
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979 break; |
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980 } |
| 0 | 981 case relocInfo::external_word_type: |
| 982 case relocInfo::internal_word_type: | |
| 983 case relocInfo::section_word_type: | |
| 984 { | |
| 985 DataRelocation* r = (DataRelocation*) reloc(); | |
| 986 tty->print(" | [target=" INTPTR_FORMAT "]", r->value()); //value==target | |
| 987 break; | |
| 988 } | |
| 989 case relocInfo::static_call_type: | |
| 990 case relocInfo::runtime_call_type: | |
| 991 { | |
| 992 CallRelocation* r = (CallRelocation*) reloc(); | |
| 993 tty->print(" | [destination=" INTPTR_FORMAT "]", r->destination()); | |
| 994 break; | |
| 995 } | |
| 996 case relocInfo::virtual_call_type: | |
| 997 { | |
| 998 virtual_call_Relocation* r = (virtual_call_Relocation*) reloc(); | |
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999 tty->print(" | [destination=" INTPTR_FORMAT " cached_value=" INTPTR_FORMAT "]", |
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1000 r->destination(), r->cached_value()); |
| 0 | 1001 break; |
| 1002 } | |
| 1003 case relocInfo::static_stub_type: | |
| 1004 { | |
| 1005 static_stub_Relocation* r = (static_stub_Relocation*) reloc(); | |
| 1006 tty->print(" | [static_call=" INTPTR_FORMAT "]", r->static_call()); | |
| 1007 break; | |
| 1008 } | |
|
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1009 case relocInfo::trampoline_stub_type: |
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1010 { |
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1011 trampoline_stub_Relocation* r = (trampoline_stub_Relocation*) reloc(); |
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1012 tty->print(" | [trampoline owner=" INTPTR_FORMAT "]", r->owner()); |
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1013 break; |
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1014 } |
| 0 | 1015 } |
| 1016 tty->cr(); | |
| 1017 } | |
| 1018 | |
| 1019 | |
| 1020 void RelocIterator::print() { | |
| 1021 RelocIterator save_this = (*this); | |
| 1022 relocInfo* scan = _current; | |
| 1023 if (!has_current()) scan += 1; // nothing to scan here! | |
| 1024 | |
| 1025 bool skip_next = has_current(); | |
| 1026 bool got_next; | |
| 1027 while (true) { | |
| 1028 got_next = (skip_next || next()); | |
| 1029 skip_next = false; | |
| 1030 | |
| 1031 tty->print(" @" INTPTR_FORMAT ": ", scan); | |
| 1032 relocInfo* newscan = _current+1; | |
| 1033 if (!has_current()) newscan -= 1; // nothing to scan here! | |
| 1034 while (scan < newscan) { | |
| 1035 tty->print("%04x", *(short*)scan & 0xFFFF); | |
| 1036 scan++; | |
| 1037 } | |
| 1038 tty->cr(); | |
| 1039 | |
| 1040 if (!got_next) break; | |
| 1041 print_current(); | |
| 1042 } | |
| 1043 | |
| 1044 (*this) = save_this; | |
| 1045 } | |
| 1046 | |
| 1047 // For the debugger: | |
| 1048 extern "C" | |
|
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1049 void print_blob_locs(nmethod* nm) { |
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1050 nm->print(); |
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changeset
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1051 RelocIterator iter(nm); |
| 0 | 1052 iter.print(); |
| 1053 } | |
| 1054 extern "C" | |
| 1055 void print_buf_locs(CodeBuffer* cb) { | |
| 1056 FlagSetting fs(PrintRelocations, true); | |
| 1057 cb->print(); | |
| 1058 } | |
| 1059 #endif // !PRODUCT |