Wed, 27 Apr 2016 01:25:04 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "code/codeCache.hpp" |
aoqi@0 | 27 | #include "code/compiledIC.hpp" |
aoqi@0 | 28 | #include "code/nmethod.hpp" |
aoqi@0 | 29 | #include "code/relocInfo.hpp" |
aoqi@0 | 30 | #include "memory/resourceArea.hpp" |
aoqi@0 | 31 | #include "runtime/stubCodeGenerator.hpp" |
aoqi@0 | 32 | #include "utilities/copy.hpp" |
aoqi@0 | 33 | |
aoqi@0 | 34 | PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
aoqi@0 | 35 | |
aoqi@0 | 36 | const RelocationHolder RelocationHolder::none; // its type is relocInfo::none |
aoqi@0 | 37 | |
aoqi@0 | 38 | |
aoqi@0 | 39 | // Implementation of relocInfo |
aoqi@0 | 40 | |
aoqi@0 | 41 | #ifdef ASSERT |
aoqi@0 | 42 | relocInfo::relocInfo(relocType t, int off, int f) { |
aoqi@0 | 43 | assert(t != data_prefix_tag, "cannot build a prefix this way"); |
aoqi@0 | 44 | assert((t & type_mask) == t, "wrong type"); |
aoqi@0 | 45 | assert((f & format_mask) == f, "wrong format"); |
aoqi@0 | 46 | assert(off >= 0 && off < offset_limit(), "offset out off bounds"); |
aoqi@0 | 47 | assert((off & (offset_unit-1)) == 0, "misaligned offset"); |
aoqi@0 | 48 | (*this) = relocInfo(t, RAW_BITS, off, f); |
aoqi@0 | 49 | } |
aoqi@0 | 50 | #endif |
aoqi@0 | 51 | |
aoqi@0 | 52 | void relocInfo::initialize(CodeSection* dest, Relocation* reloc) { |
aoqi@0 | 53 | relocInfo* data = this+1; // here's where the data might go |
aoqi@0 | 54 | dest->set_locs_end(data); // sync end: the next call may read dest.locs_end |
aoqi@0 | 55 | reloc->pack_data_to(dest); // maybe write data into locs, advancing locs_end |
aoqi@0 | 56 | relocInfo* data_limit = dest->locs_end(); |
aoqi@0 | 57 | if (data_limit > data) { |
aoqi@0 | 58 | relocInfo suffix = (*this); |
aoqi@0 | 59 | data_limit = this->finish_prefix((short*) data_limit); |
aoqi@0 | 60 | // Finish up with the suffix. (Hack note: pack_data_to might edit this.) |
aoqi@0 | 61 | *data_limit = suffix; |
aoqi@0 | 62 | dest->set_locs_end(data_limit+1); |
aoqi@0 | 63 | } |
aoqi@0 | 64 | } |
aoqi@0 | 65 | |
aoqi@0 | 66 | relocInfo* relocInfo::finish_prefix(short* prefix_limit) { |
aoqi@0 | 67 | assert(sizeof(relocInfo) == sizeof(short), "change this code"); |
aoqi@0 | 68 | short* p = (short*)(this+1); |
aoqi@0 | 69 | assert(prefix_limit >= p, "must be a valid span of data"); |
aoqi@0 | 70 | int plen = prefix_limit - p; |
aoqi@0 | 71 | if (plen == 0) { |
aoqi@0 | 72 | debug_only(_value = 0xFFFF); |
aoqi@0 | 73 | return this; // no data: remove self completely |
aoqi@0 | 74 | } |
aoqi@0 | 75 | if (plen == 1 && fits_into_immediate(p[0])) { |
aoqi@0 | 76 | (*this) = immediate_relocInfo(p[0]); // move data inside self |
aoqi@0 | 77 | return this+1; |
aoqi@0 | 78 | } |
aoqi@0 | 79 | // cannot compact, so just update the count and return the limit pointer |
aoqi@0 | 80 | (*this) = prefix_relocInfo(plen); // write new datalen |
aoqi@0 | 81 | assert(data() + datalen() == prefix_limit, "pointers must line up"); |
aoqi@0 | 82 | return (relocInfo*)prefix_limit; |
aoqi@0 | 83 | } |
aoqi@0 | 84 | |
aoqi@0 | 85 | |
aoqi@0 | 86 | void relocInfo::set_type(relocType t) { |
aoqi@0 | 87 | int old_offset = addr_offset(); |
aoqi@0 | 88 | int old_format = format(); |
aoqi@0 | 89 | (*this) = relocInfo(t, old_offset, old_format); |
aoqi@0 | 90 | assert(type()==(int)t, "sanity check"); |
aoqi@0 | 91 | assert(addr_offset()==old_offset, "sanity check"); |
aoqi@0 | 92 | assert(format()==old_format, "sanity check"); |
aoqi@0 | 93 | } |
aoqi@0 | 94 | |
aoqi@0 | 95 | |
aoqi@0 | 96 | void relocInfo::set_format(int f) { |
aoqi@0 | 97 | int old_offset = addr_offset(); |
aoqi@0 | 98 | assert((f & format_mask) == f, "wrong format"); |
aoqi@0 | 99 | _value = (_value & ~(format_mask << offset_width)) | (f << offset_width); |
aoqi@0 | 100 | assert(addr_offset()==old_offset, "sanity check"); |
aoqi@0 | 101 | } |
aoqi@0 | 102 | |
aoqi@0 | 103 | |
aoqi@0 | 104 | void relocInfo::change_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type, relocType new_type) { |
aoqi@0 | 105 | bool found = false; |
aoqi@0 | 106 | while (itr->next() && !found) { |
aoqi@0 | 107 | if (itr->addr() == pc) { |
aoqi@0 | 108 | assert(itr->type()==old_type, "wrong relocInfo type found"); |
aoqi@0 | 109 | itr->current()->set_type(new_type); |
aoqi@0 | 110 | found=true; |
aoqi@0 | 111 | } |
aoqi@0 | 112 | } |
aoqi@0 | 113 | assert(found, "no relocInfo found for pc"); |
aoqi@0 | 114 | } |
aoqi@0 | 115 | |
aoqi@0 | 116 | |
aoqi@0 | 117 | void relocInfo::remove_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type) { |
aoqi@0 | 118 | change_reloc_info_for_address(itr, pc, old_type, none); |
aoqi@0 | 119 | } |
aoqi@0 | 120 | |
aoqi@0 | 121 | |
aoqi@0 | 122 | // ---------------------------------------------------------------------------------------------------- |
aoqi@0 | 123 | // Implementation of RelocIterator |
aoqi@0 | 124 | |
aoqi@0 | 125 | void RelocIterator::initialize(nmethod* nm, address begin, address limit) { |
aoqi@0 | 126 | initialize_misc(); |
aoqi@0 | 127 | |
aoqi@0 | 128 | if (nm == NULL && begin != NULL) { |
aoqi@0 | 129 | // allow nmethod to be deduced from beginning address |
aoqi@0 | 130 | CodeBlob* cb = CodeCache::find_blob(begin); |
aoqi@0 | 131 | nm = cb->as_nmethod_or_null(); |
aoqi@0 | 132 | } |
aoqi@0 | 133 | assert(nm != NULL, "must be able to deduce nmethod from other arguments"); |
aoqi@0 | 134 | |
aoqi@0 | 135 | _code = nm; |
aoqi@0 | 136 | _current = nm->relocation_begin() - 1; |
aoqi@0 | 137 | _end = nm->relocation_end(); |
aoqi@0 | 138 | _addr = nm->content_begin(); |
aoqi@0 | 139 | |
aoqi@0 | 140 | // Initialize code sections. |
aoqi@0 | 141 | _section_start[CodeBuffer::SECT_CONSTS] = nm->consts_begin(); |
aoqi@0 | 142 | _section_start[CodeBuffer::SECT_INSTS ] = nm->insts_begin() ; |
aoqi@0 | 143 | _section_start[CodeBuffer::SECT_STUBS ] = nm->stub_begin() ; |
aoqi@0 | 144 | |
aoqi@0 | 145 | _section_end [CodeBuffer::SECT_CONSTS] = nm->consts_end() ; |
aoqi@0 | 146 | _section_end [CodeBuffer::SECT_INSTS ] = nm->insts_end() ; |
aoqi@0 | 147 | _section_end [CodeBuffer::SECT_STUBS ] = nm->stub_end() ; |
aoqi@0 | 148 | |
aoqi@0 | 149 | assert(!has_current(), "just checking"); |
aoqi@0 | 150 | assert(begin == NULL || begin >= nm->code_begin(), "in bounds"); |
aoqi@0 | 151 | assert(limit == NULL || limit <= nm->code_end(), "in bounds"); |
aoqi@0 | 152 | set_limits(begin, limit); |
aoqi@0 | 153 | } |
aoqi@0 | 154 | |
aoqi@0 | 155 | |
aoqi@0 | 156 | RelocIterator::RelocIterator(CodeSection* cs, address begin, address limit) { |
aoqi@0 | 157 | initialize_misc(); |
aoqi@0 | 158 | |
aoqi@0 | 159 | _current = cs->locs_start()-1; |
aoqi@0 | 160 | _end = cs->locs_end(); |
aoqi@0 | 161 | _addr = cs->start(); |
aoqi@0 | 162 | _code = NULL; // Not cb->blob(); |
aoqi@0 | 163 | |
aoqi@0 | 164 | CodeBuffer* cb = cs->outer(); |
aoqi@0 | 165 | assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal"); |
aoqi@0 | 166 | for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) { |
aoqi@0 | 167 | CodeSection* cs = cb->code_section(n); |
aoqi@0 | 168 | _section_start[n] = cs->start(); |
aoqi@0 | 169 | _section_end [n] = cs->end(); |
aoqi@0 | 170 | } |
aoqi@0 | 171 | |
aoqi@0 | 172 | assert(!has_current(), "just checking"); |
aoqi@0 | 173 | |
aoqi@0 | 174 | assert(begin == NULL || begin >= cs->start(), "in bounds"); |
aoqi@0 | 175 | assert(limit == NULL || limit <= cs->end(), "in bounds"); |
aoqi@0 | 176 | set_limits(begin, limit); |
aoqi@0 | 177 | } |
aoqi@0 | 178 | |
aoqi@0 | 179 | |
aoqi@0 | 180 | enum { indexCardSize = 128 }; |
aoqi@0 | 181 | struct RelocIndexEntry { |
aoqi@0 | 182 | jint addr_offset; // offset from header_end of an addr() |
aoqi@0 | 183 | jint reloc_offset; // offset from header_end of a relocInfo (prefix) |
aoqi@0 | 184 | }; |
aoqi@0 | 185 | |
aoqi@0 | 186 | |
aoqi@0 | 187 | bool RelocIterator::addr_in_const() const { |
aoqi@0 | 188 | const int n = CodeBuffer::SECT_CONSTS; |
aoqi@0 | 189 | return section_start(n) <= addr() && addr() < section_end(n); |
aoqi@0 | 190 | } |
aoqi@0 | 191 | |
aoqi@0 | 192 | |
aoqi@0 | 193 | static inline int num_cards(int code_size) { |
aoqi@0 | 194 | return (code_size-1) / indexCardSize; |
aoqi@0 | 195 | } |
aoqi@0 | 196 | |
aoqi@0 | 197 | |
aoqi@0 | 198 | int RelocIterator::locs_and_index_size(int code_size, int locs_size) { |
aoqi@0 | 199 | if (!UseRelocIndex) return locs_size; // no index |
aoqi@0 | 200 | code_size = round_to(code_size, oopSize); |
aoqi@0 | 201 | locs_size = round_to(locs_size, oopSize); |
aoqi@0 | 202 | int index_size = num_cards(code_size) * sizeof(RelocIndexEntry); |
aoqi@0 | 203 | // format of indexed relocs: |
aoqi@0 | 204 | // relocation_begin: relocInfo ... |
aoqi@0 | 205 | // index: (addr,reloc#) ... |
aoqi@0 | 206 | // indexSize :relocation_end |
aoqi@0 | 207 | return locs_size + index_size + BytesPerInt; |
aoqi@0 | 208 | } |
aoqi@0 | 209 | |
aoqi@0 | 210 | |
aoqi@0 | 211 | void RelocIterator::create_index(relocInfo* dest_begin, int dest_count, relocInfo* dest_end) { |
aoqi@0 | 212 | address relocation_begin = (address)dest_begin; |
aoqi@0 | 213 | address relocation_end = (address)dest_end; |
aoqi@0 | 214 | int total_size = relocation_end - relocation_begin; |
aoqi@0 | 215 | int locs_size = dest_count * sizeof(relocInfo); |
aoqi@0 | 216 | if (!UseRelocIndex) { |
aoqi@0 | 217 | Copy::fill_to_bytes(relocation_begin + locs_size, total_size-locs_size, 0); |
aoqi@0 | 218 | return; |
aoqi@0 | 219 | } |
aoqi@0 | 220 | int index_size = total_size - locs_size - BytesPerInt; // find out how much space is left |
aoqi@0 | 221 | int ncards = index_size / sizeof(RelocIndexEntry); |
aoqi@0 | 222 | assert(total_size == locs_size + index_size + BytesPerInt, "checkin'"); |
aoqi@0 | 223 | assert(index_size >= 0 && index_size % sizeof(RelocIndexEntry) == 0, "checkin'"); |
aoqi@0 | 224 | jint* index_size_addr = (jint*)relocation_end - 1; |
aoqi@0 | 225 | |
aoqi@0 | 226 | assert(sizeof(jint) == BytesPerInt, "change this code"); |
aoqi@0 | 227 | |
aoqi@0 | 228 | *index_size_addr = index_size; |
aoqi@0 | 229 | if (index_size != 0) { |
aoqi@0 | 230 | assert(index_size > 0, "checkin'"); |
aoqi@0 | 231 | |
aoqi@0 | 232 | RelocIndexEntry* index = (RelocIndexEntry *)(relocation_begin + locs_size); |
aoqi@0 | 233 | assert(index == (RelocIndexEntry*)index_size_addr - ncards, "checkin'"); |
aoqi@0 | 234 | |
aoqi@0 | 235 | // walk over the relocations, and fill in index entries as we go |
aoqi@0 | 236 | RelocIterator iter; |
aoqi@0 | 237 | const address initial_addr = NULL; |
aoqi@0 | 238 | relocInfo* const initial_current = dest_begin - 1; // biased by -1 like elsewhere |
aoqi@0 | 239 | |
aoqi@0 | 240 | iter._code = NULL; |
aoqi@0 | 241 | iter._addr = initial_addr; |
aoqi@0 | 242 | iter._limit = (address)(intptr_t)(ncards * indexCardSize); |
aoqi@0 | 243 | iter._current = initial_current; |
aoqi@0 | 244 | iter._end = dest_begin + dest_count; |
aoqi@0 | 245 | |
aoqi@0 | 246 | int i = 0; |
aoqi@0 | 247 | address next_card_addr = (address)indexCardSize; |
aoqi@0 | 248 | int addr_offset = 0; |
aoqi@0 | 249 | int reloc_offset = 0; |
aoqi@0 | 250 | while (true) { |
aoqi@0 | 251 | // Checkpoint the iterator before advancing it. |
aoqi@0 | 252 | addr_offset = iter._addr - initial_addr; |
aoqi@0 | 253 | reloc_offset = iter._current - initial_current; |
aoqi@0 | 254 | if (!iter.next()) break; |
aoqi@0 | 255 | while (iter.addr() >= next_card_addr) { |
aoqi@0 | 256 | index[i].addr_offset = addr_offset; |
aoqi@0 | 257 | index[i].reloc_offset = reloc_offset; |
aoqi@0 | 258 | i++; |
aoqi@0 | 259 | next_card_addr += indexCardSize; |
aoqi@0 | 260 | } |
aoqi@0 | 261 | } |
aoqi@0 | 262 | while (i < ncards) { |
aoqi@0 | 263 | index[i].addr_offset = addr_offset; |
aoqi@0 | 264 | index[i].reloc_offset = reloc_offset; |
aoqi@0 | 265 | i++; |
aoqi@0 | 266 | } |
aoqi@0 | 267 | } |
aoqi@0 | 268 | } |
aoqi@0 | 269 | |
aoqi@0 | 270 | |
aoqi@0 | 271 | void RelocIterator::set_limits(address begin, address limit) { |
aoqi@0 | 272 | int index_size = 0; |
aoqi@0 | 273 | if (UseRelocIndex && _code != NULL) { |
aoqi@0 | 274 | index_size = ((jint*)_end)[-1]; |
aoqi@0 | 275 | _end = (relocInfo*)( (address)_end - index_size - BytesPerInt ); |
aoqi@0 | 276 | } |
aoqi@0 | 277 | |
aoqi@0 | 278 | _limit = limit; |
aoqi@0 | 279 | |
aoqi@0 | 280 | // the limit affects this next stuff: |
aoqi@0 | 281 | if (begin != NULL) { |
aoqi@0 | 282 | #ifdef ASSERT |
aoqi@0 | 283 | // In ASSERT mode we do not actually use the index, but simply |
aoqi@0 | 284 | // check that its contents would have led us to the right answer. |
aoqi@0 | 285 | address addrCheck = _addr; |
aoqi@0 | 286 | relocInfo* infoCheck = _current; |
aoqi@0 | 287 | #endif // ASSERT |
aoqi@0 | 288 | if (index_size > 0) { |
aoqi@0 | 289 | // skip ahead |
aoqi@0 | 290 | RelocIndexEntry* index = (RelocIndexEntry*)_end; |
aoqi@0 | 291 | RelocIndexEntry* index_limit = (RelocIndexEntry*)((address)index + index_size); |
aoqi@0 | 292 | assert(_addr == _code->code_begin(), "_addr must be unadjusted"); |
aoqi@0 | 293 | int card = (begin - _addr) / indexCardSize; |
aoqi@0 | 294 | if (card > 0) { |
aoqi@0 | 295 | if (index+card-1 < index_limit) index += card-1; |
aoqi@0 | 296 | else index = index_limit - 1; |
aoqi@0 | 297 | #ifdef ASSERT |
aoqi@0 | 298 | addrCheck = _addr + index->addr_offset; |
aoqi@0 | 299 | infoCheck = _current + index->reloc_offset; |
aoqi@0 | 300 | #else |
aoqi@0 | 301 | // Advance the iterator immediately to the last valid state |
aoqi@0 | 302 | // for the previous card. Calling "next" will then advance |
aoqi@0 | 303 | // it to the first item on the required card. |
aoqi@0 | 304 | _addr += index->addr_offset; |
aoqi@0 | 305 | _current += index->reloc_offset; |
aoqi@0 | 306 | #endif // ASSERT |
aoqi@0 | 307 | } |
aoqi@0 | 308 | } |
aoqi@0 | 309 | |
aoqi@0 | 310 | relocInfo* backup; |
aoqi@0 | 311 | address backup_addr; |
aoqi@0 | 312 | while (true) { |
aoqi@0 | 313 | backup = _current; |
aoqi@0 | 314 | backup_addr = _addr; |
aoqi@0 | 315 | #ifdef ASSERT |
aoqi@0 | 316 | if (backup == infoCheck) { |
aoqi@0 | 317 | assert(backup_addr == addrCheck, "must match"); addrCheck = NULL; infoCheck = NULL; |
aoqi@0 | 318 | } else { |
aoqi@0 | 319 | assert(addrCheck == NULL || backup_addr <= addrCheck, "must not pass addrCheck"); |
aoqi@0 | 320 | } |
aoqi@0 | 321 | #endif // ASSERT |
aoqi@0 | 322 | if (!next() || addr() >= begin) break; |
aoqi@0 | 323 | } |
aoqi@0 | 324 | assert(addrCheck == NULL || addrCheck == backup_addr, "must have matched addrCheck"); |
aoqi@0 | 325 | assert(infoCheck == NULL || infoCheck == backup, "must have matched infoCheck"); |
aoqi@0 | 326 | // At this point, either we are at the first matching record, |
aoqi@0 | 327 | // or else there is no such record, and !has_current(). |
aoqi@0 | 328 | // In either case, revert to the immediatly preceding state. |
aoqi@0 | 329 | _current = backup; |
aoqi@0 | 330 | _addr = backup_addr; |
aoqi@0 | 331 | set_has_current(false); |
aoqi@0 | 332 | } |
aoqi@0 | 333 | } |
aoqi@0 | 334 | |
aoqi@0 | 335 | |
aoqi@0 | 336 | void RelocIterator::set_limit(address limit) { |
aoqi@0 | 337 | address code_end = (address)code() + code()->size(); |
aoqi@0 | 338 | assert(limit == NULL || limit <= code_end, "in bounds"); |
aoqi@0 | 339 | _limit = limit; |
aoqi@0 | 340 | } |
aoqi@0 | 341 | |
aoqi@0 | 342 | // All the strange bit-encodings are in here. |
aoqi@0 | 343 | // The idea is to encode relocation data which are small integers |
aoqi@0 | 344 | // very efficiently (a single extra halfword). Larger chunks of |
aoqi@0 | 345 | // relocation data need a halfword header to hold their size. |
aoqi@0 | 346 | void RelocIterator::advance_over_prefix() { |
aoqi@0 | 347 | if (_current->is_datalen()) { |
aoqi@0 | 348 | _data = (short*) _current->data(); |
aoqi@0 | 349 | _datalen = _current->datalen(); |
aoqi@0 | 350 | _current += _datalen + 1; // skip the embedded data & header |
aoqi@0 | 351 | } else { |
aoqi@0 | 352 | _databuf = _current->immediate(); |
aoqi@0 | 353 | _data = &_databuf; |
aoqi@0 | 354 | _datalen = 1; |
aoqi@0 | 355 | _current++; // skip the header |
aoqi@0 | 356 | } |
aoqi@0 | 357 | // The client will see the following relocInfo, whatever that is. |
aoqi@0 | 358 | // It is the reloc to which the preceding data applies. |
aoqi@0 | 359 | } |
aoqi@0 | 360 | |
aoqi@0 | 361 | |
aoqi@0 | 362 | void RelocIterator::initialize_misc() { |
aoqi@0 | 363 | set_has_current(false); |
aoqi@0 | 364 | for (int i = (int) CodeBuffer::SECT_FIRST; i < (int) CodeBuffer::SECT_LIMIT; i++) { |
aoqi@0 | 365 | _section_start[i] = NULL; // these will be lazily computed, if needed |
aoqi@0 | 366 | _section_end [i] = NULL; |
aoqi@0 | 367 | } |
aoqi@0 | 368 | } |
aoqi@0 | 369 | |
aoqi@0 | 370 | |
aoqi@0 | 371 | Relocation* RelocIterator::reloc() { |
aoqi@0 | 372 | // (take the "switch" out-of-line) |
aoqi@0 | 373 | relocInfo::relocType t = type(); |
aoqi@0 | 374 | if (false) {} |
aoqi@0 | 375 | #define EACH_TYPE(name) \ |
aoqi@0 | 376 | else if (t == relocInfo::name##_type) { \ |
aoqi@0 | 377 | return name##_reloc(); \ |
aoqi@0 | 378 | } |
aoqi@0 | 379 | APPLY_TO_RELOCATIONS(EACH_TYPE); |
aoqi@0 | 380 | #undef EACH_TYPE |
aoqi@0 | 381 | assert(t == relocInfo::none, "must be padding"); |
aoqi@0 | 382 | return new(_rh) Relocation(); |
aoqi@0 | 383 | } |
aoqi@0 | 384 | |
aoqi@0 | 385 | |
aoqi@0 | 386 | //////// Methods for flyweight Relocation types |
aoqi@0 | 387 | |
aoqi@0 | 388 | |
aoqi@0 | 389 | RelocationHolder RelocationHolder::plus(int offset) const { |
aoqi@0 | 390 | if (offset != 0) { |
aoqi@0 | 391 | switch (type()) { |
aoqi@0 | 392 | case relocInfo::none: |
aoqi@0 | 393 | break; |
aoqi@0 | 394 | case relocInfo::oop_type: |
aoqi@0 | 395 | { |
aoqi@0 | 396 | oop_Relocation* r = (oop_Relocation*)reloc(); |
aoqi@0 | 397 | return oop_Relocation::spec(r->oop_index(), r->offset() + offset); |
aoqi@0 | 398 | } |
aoqi@0 | 399 | case relocInfo::metadata_type: |
aoqi@0 | 400 | { |
aoqi@0 | 401 | metadata_Relocation* r = (metadata_Relocation*)reloc(); |
aoqi@0 | 402 | return metadata_Relocation::spec(r->metadata_index(), r->offset() + offset); |
aoqi@0 | 403 | } |
aoqi@0 | 404 | default: |
aoqi@0 | 405 | ShouldNotReachHere(); |
aoqi@0 | 406 | } |
aoqi@0 | 407 | } |
aoqi@0 | 408 | return (*this); |
aoqi@0 | 409 | } |
aoqi@0 | 410 | |
aoqi@0 | 411 | |
aoqi@0 | 412 | void Relocation::guarantee_size() { |
aoqi@0 | 413 | guarantee(false, "Make _relocbuf bigger!"); |
aoqi@0 | 414 | } |
aoqi@0 | 415 | |
aoqi@0 | 416 | // some relocations can compute their own values |
aoqi@0 | 417 | address Relocation::value() { |
aoqi@0 | 418 | ShouldNotReachHere(); |
aoqi@0 | 419 | return NULL; |
aoqi@0 | 420 | } |
aoqi@0 | 421 | |
aoqi@0 | 422 | |
aoqi@0 | 423 | void Relocation::set_value(address x) { |
aoqi@0 | 424 | ShouldNotReachHere(); |
aoqi@0 | 425 | } |
aoqi@0 | 426 | |
aoqi@0 | 427 | |
aoqi@0 | 428 | RelocationHolder Relocation::spec_simple(relocInfo::relocType rtype) { |
aoqi@0 | 429 | if (rtype == relocInfo::none) return RelocationHolder::none; |
aoqi@0 | 430 | relocInfo ri = relocInfo(rtype, 0); |
aoqi@0 | 431 | RelocIterator itr; |
aoqi@0 | 432 | itr.set_current(ri); |
aoqi@0 | 433 | itr.reloc(); |
aoqi@0 | 434 | return itr._rh; |
aoqi@0 | 435 | } |
aoqi@0 | 436 | |
aoqi@0 | 437 | int32_t Relocation::runtime_address_to_index(address runtime_address) { |
aoqi@0 | 438 | assert(!is_reloc_index((intptr_t)runtime_address), "must not look like an index"); |
aoqi@0 | 439 | |
aoqi@0 | 440 | if (runtime_address == NULL) return 0; |
aoqi@0 | 441 | |
aoqi@0 | 442 | StubCodeDesc* p = StubCodeDesc::desc_for(runtime_address); |
aoqi@0 | 443 | if (p != NULL && p->begin() == runtime_address) { |
aoqi@0 | 444 | assert(is_reloc_index(p->index()), "there must not be too many stubs"); |
aoqi@0 | 445 | return (int32_t)p->index(); |
aoqi@0 | 446 | } else { |
aoqi@0 | 447 | // Known "miscellaneous" non-stub pointers: |
aoqi@0 | 448 | // os::get_polling_page(), SafepointSynchronize::address_of_state() |
aoqi@0 | 449 | if (PrintRelocations) { |
aoqi@0 | 450 | tty->print_cr("random unregistered address in relocInfo: " INTPTR_FORMAT, runtime_address); |
aoqi@0 | 451 | } |
aoqi@0 | 452 | #ifndef _LP64 |
aoqi@0 | 453 | return (int32_t) (intptr_t)runtime_address; |
aoqi@0 | 454 | #else |
aoqi@0 | 455 | // didn't fit return non-index |
aoqi@0 | 456 | return -1; |
aoqi@0 | 457 | #endif /* _LP64 */ |
aoqi@0 | 458 | } |
aoqi@0 | 459 | } |
aoqi@0 | 460 | |
aoqi@0 | 461 | |
aoqi@0 | 462 | address Relocation::index_to_runtime_address(int32_t index) { |
aoqi@0 | 463 | if (index == 0) return NULL; |
aoqi@0 | 464 | |
aoqi@0 | 465 | if (is_reloc_index(index)) { |
aoqi@0 | 466 | StubCodeDesc* p = StubCodeDesc::desc_for_index(index); |
aoqi@0 | 467 | assert(p != NULL, "there must be a stub for this index"); |
aoqi@0 | 468 | return p->begin(); |
aoqi@0 | 469 | } else { |
aoqi@0 | 470 | #ifndef _LP64 |
aoqi@0 | 471 | // this only works on 32bit machines |
aoqi@0 | 472 | return (address) ((intptr_t) index); |
aoqi@0 | 473 | #else |
aoqi@0 | 474 | fatal("Relocation::index_to_runtime_address, int32_t not pointer sized"); |
aoqi@0 | 475 | return NULL; |
aoqi@0 | 476 | #endif /* _LP64 */ |
aoqi@0 | 477 | } |
aoqi@0 | 478 | } |
aoqi@0 | 479 | |
aoqi@0 | 480 | address Relocation::old_addr_for(address newa, |
aoqi@0 | 481 | const CodeBuffer* src, CodeBuffer* dest) { |
aoqi@0 | 482 | int sect = dest->section_index_of(newa); |
aoqi@0 | 483 | guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); |
aoqi@0 | 484 | address ostart = src->code_section(sect)->start(); |
aoqi@0 | 485 | address nstart = dest->code_section(sect)->start(); |
aoqi@0 | 486 | return ostart + (newa - nstart); |
aoqi@0 | 487 | } |
aoqi@0 | 488 | |
aoqi@0 | 489 | address Relocation::new_addr_for(address olda, |
aoqi@0 | 490 | const CodeBuffer* src, CodeBuffer* dest) { |
aoqi@0 | 491 | debug_only(const CodeBuffer* src0 = src); |
aoqi@0 | 492 | int sect = CodeBuffer::SECT_NONE; |
aoqi@0 | 493 | // Look for olda in the source buffer, and all previous incarnations |
aoqi@0 | 494 | // if the source buffer has been expanded. |
aoqi@0 | 495 | for (; src != NULL; src = src->before_expand()) { |
aoqi@0 | 496 | sect = src->section_index_of(olda); |
aoqi@0 | 497 | if (sect != CodeBuffer::SECT_NONE) break; |
aoqi@0 | 498 | } |
aoqi@0 | 499 | guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); |
aoqi@0 | 500 | address ostart = src->code_section(sect)->start(); |
aoqi@0 | 501 | address nstart = dest->code_section(sect)->start(); |
aoqi@0 | 502 | return nstart + (olda - ostart); |
aoqi@0 | 503 | } |
aoqi@0 | 504 | |
aoqi@0 | 505 | void Relocation::normalize_address(address& addr, const CodeSection* dest, bool allow_other_sections) { |
aoqi@0 | 506 | address addr0 = addr; |
aoqi@0 | 507 | if (addr0 == NULL || dest->allocates2(addr0)) return; |
aoqi@0 | 508 | CodeBuffer* cb = dest->outer(); |
aoqi@0 | 509 | addr = new_addr_for(addr0, cb, cb); |
aoqi@0 | 510 | assert(allow_other_sections || dest->contains2(addr), |
aoqi@0 | 511 | "addr must be in required section"); |
aoqi@0 | 512 | } |
aoqi@0 | 513 | |
aoqi@0 | 514 | |
aoqi@0 | 515 | void CallRelocation::set_destination(address x) { |
aoqi@0 | 516 | pd_set_call_destination(x); |
aoqi@0 | 517 | } |
aoqi@0 | 518 | |
aoqi@0 | 519 | void CallRelocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { |
aoqi@0 | 520 | // Usually a self-relative reference to an external routine. |
aoqi@0 | 521 | // On some platforms, the reference is absolute (not self-relative). |
aoqi@0 | 522 | // The enhanced use of pd_call_destination sorts this all out. |
aoqi@0 | 523 | address orig_addr = old_addr_for(addr(), src, dest); |
aoqi@0 | 524 | address callee = pd_call_destination(orig_addr); |
aoqi@0 | 525 | // Reassert the callee address, this time in the new copy of the code. |
aoqi@0 | 526 | pd_set_call_destination(callee); |
aoqi@0 | 527 | } |
aoqi@0 | 528 | |
aoqi@0 | 529 | |
aoqi@0 | 530 | //// pack/unpack methods |
aoqi@0 | 531 | |
aoqi@0 | 532 | void oop_Relocation::pack_data_to(CodeSection* dest) { |
aoqi@0 | 533 | short* p = (short*) dest->locs_end(); |
aoqi@0 | 534 | p = pack_2_ints_to(p, _oop_index, _offset); |
aoqi@0 | 535 | dest->set_locs_end((relocInfo*) p); |
aoqi@0 | 536 | } |
aoqi@0 | 537 | |
aoqi@0 | 538 | |
aoqi@0 | 539 | void oop_Relocation::unpack_data() { |
aoqi@0 | 540 | unpack_2_ints(_oop_index, _offset); |
aoqi@0 | 541 | } |
aoqi@0 | 542 | |
aoqi@0 | 543 | void metadata_Relocation::pack_data_to(CodeSection* dest) { |
aoqi@0 | 544 | short* p = (short*) dest->locs_end(); |
aoqi@0 | 545 | p = pack_2_ints_to(p, _metadata_index, _offset); |
aoqi@0 | 546 | dest->set_locs_end((relocInfo*) p); |
aoqi@0 | 547 | } |
aoqi@0 | 548 | |
aoqi@0 | 549 | |
aoqi@0 | 550 | void metadata_Relocation::unpack_data() { |
aoqi@0 | 551 | unpack_2_ints(_metadata_index, _offset); |
aoqi@0 | 552 | } |
aoqi@0 | 553 | |
aoqi@0 | 554 | |
aoqi@0 | 555 | void virtual_call_Relocation::pack_data_to(CodeSection* dest) { |
aoqi@0 | 556 | short* p = (short*) dest->locs_end(); |
aoqi@0 | 557 | address point = dest->locs_point(); |
aoqi@0 | 558 | |
aoqi@0 | 559 | normalize_address(_cached_value, dest); |
aoqi@0 | 560 | jint x0 = scaled_offset_null_special(_cached_value, point); |
aoqi@0 | 561 | p = pack_1_int_to(p, x0); |
aoqi@0 | 562 | dest->set_locs_end((relocInfo*) p); |
aoqi@0 | 563 | } |
aoqi@0 | 564 | |
aoqi@0 | 565 | |
aoqi@0 | 566 | void virtual_call_Relocation::unpack_data() { |
aoqi@0 | 567 | jint x0 = unpack_1_int(); |
aoqi@0 | 568 | address point = addr(); |
aoqi@0 | 569 | _cached_value = x0==0? NULL: address_from_scaled_offset(x0, point); |
aoqi@0 | 570 | } |
aoqi@0 | 571 | |
aoqi@0 | 572 | |
aoqi@0 | 573 | void static_stub_Relocation::pack_data_to(CodeSection* dest) { |
aoqi@0 | 574 | short* p = (short*) dest->locs_end(); |
aoqi@0 | 575 | CodeSection* insts = dest->outer()->insts(); |
aoqi@0 | 576 | normalize_address(_static_call, insts); |
aoqi@0 | 577 | p = pack_1_int_to(p, scaled_offset(_static_call, insts->start())); |
aoqi@0 | 578 | dest->set_locs_end((relocInfo*) p); |
aoqi@0 | 579 | } |
aoqi@0 | 580 | |
aoqi@0 | 581 | void static_stub_Relocation::unpack_data() { |
aoqi@0 | 582 | address base = binding()->section_start(CodeBuffer::SECT_INSTS); |
aoqi@0 | 583 | _static_call = address_from_scaled_offset(unpack_1_int(), base); |
aoqi@0 | 584 | } |
aoqi@0 | 585 | |
aoqi@0 | 586 | void trampoline_stub_Relocation::pack_data_to(CodeSection* dest ) { |
aoqi@0 | 587 | short* p = (short*) dest->locs_end(); |
aoqi@0 | 588 | CodeSection* insts = dest->outer()->insts(); |
aoqi@0 | 589 | normalize_address(_owner, insts); |
aoqi@0 | 590 | p = pack_1_int_to(p, scaled_offset(_owner, insts->start())); |
aoqi@0 | 591 | dest->set_locs_end((relocInfo*) p); |
aoqi@0 | 592 | } |
aoqi@0 | 593 | |
aoqi@0 | 594 | void trampoline_stub_Relocation::unpack_data() { |
aoqi@0 | 595 | address base = binding()->section_start(CodeBuffer::SECT_INSTS); |
aoqi@0 | 596 | _owner = address_from_scaled_offset(unpack_1_int(), base); |
aoqi@0 | 597 | } |
aoqi@0 | 598 | |
aoqi@0 | 599 | void external_word_Relocation::pack_data_to(CodeSection* dest) { |
aoqi@0 | 600 | short* p = (short*) dest->locs_end(); |
aoqi@0 | 601 | int32_t index = runtime_address_to_index(_target); |
aoqi@0 | 602 | #ifndef _LP64 |
aoqi@0 | 603 | p = pack_1_int_to(p, index); |
aoqi@0 | 604 | #else |
aoqi@0 | 605 | if (is_reloc_index(index)) { |
aoqi@0 | 606 | p = pack_2_ints_to(p, index, 0); |
aoqi@0 | 607 | } else { |
aoqi@0 | 608 | jlong t = (jlong) _target; |
aoqi@0 | 609 | int32_t lo = low(t); |
aoqi@0 | 610 | int32_t hi = high(t); |
aoqi@0 | 611 | p = pack_2_ints_to(p, lo, hi); |
aoqi@0 | 612 | DEBUG_ONLY(jlong t1 = jlong_from(hi, lo)); |
aoqi@0 | 613 | assert(!is_reloc_index(t1) && (address) t1 == _target, "not symmetric"); |
aoqi@0 | 614 | } |
aoqi@0 | 615 | #endif /* _LP64 */ |
aoqi@0 | 616 | dest->set_locs_end((relocInfo*) p); |
aoqi@0 | 617 | } |
aoqi@0 | 618 | |
aoqi@0 | 619 | |
aoqi@0 | 620 | void external_word_Relocation::unpack_data() { |
aoqi@0 | 621 | #ifndef _LP64 |
aoqi@0 | 622 | _target = index_to_runtime_address(unpack_1_int()); |
aoqi@0 | 623 | #else |
aoqi@0 | 624 | int32_t lo, hi; |
aoqi@0 | 625 | unpack_2_ints(lo, hi); |
aoqi@0 | 626 | jlong t = jlong_from(hi, lo);; |
aoqi@0 | 627 | if (is_reloc_index(t)) { |
aoqi@0 | 628 | _target = index_to_runtime_address(t); |
aoqi@0 | 629 | } else { |
aoqi@0 | 630 | _target = (address) t; |
aoqi@0 | 631 | } |
aoqi@0 | 632 | #endif /* _LP64 */ |
aoqi@0 | 633 | } |
aoqi@0 | 634 | |
aoqi@0 | 635 | |
aoqi@0 | 636 | void internal_word_Relocation::pack_data_to(CodeSection* dest) { |
aoqi@0 | 637 | short* p = (short*) dest->locs_end(); |
aoqi@0 | 638 | normalize_address(_target, dest, true); |
aoqi@0 | 639 | |
aoqi@0 | 640 | // Check whether my target address is valid within this section. |
aoqi@0 | 641 | // If not, strengthen the relocation type to point to another section. |
aoqi@0 | 642 | int sindex = _section; |
aoqi@0 | 643 | if (sindex == CodeBuffer::SECT_NONE && _target != NULL |
aoqi@0 | 644 | && (!dest->allocates(_target) || _target == dest->locs_point())) { |
aoqi@0 | 645 | sindex = dest->outer()->section_index_of(_target); |
aoqi@0 | 646 | guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere"); |
aoqi@0 | 647 | relocInfo* base = dest->locs_end() - 1; |
aoqi@0 | 648 | assert(base->type() == this->type(), "sanity"); |
aoqi@0 | 649 | // Change the written type, to be section_word_type instead. |
aoqi@0 | 650 | base->set_type(relocInfo::section_word_type); |
aoqi@0 | 651 | } |
aoqi@0 | 652 | |
aoqi@0 | 653 | // Note: An internal_word relocation cannot refer to its own instruction, |
aoqi@0 | 654 | // because we reserve "0" to mean that the pointer itself is embedded |
aoqi@0 | 655 | // in the code stream. We use a section_word relocation for such cases. |
aoqi@0 | 656 | |
aoqi@0 | 657 | if (sindex == CodeBuffer::SECT_NONE) { |
aoqi@0 | 658 | assert(type() == relocInfo::internal_word_type, "must be base class"); |
aoqi@0 | 659 | guarantee(_target == NULL || dest->allocates2(_target), "must be within the given code section"); |
aoqi@0 | 660 | jint x0 = scaled_offset_null_special(_target, dest->locs_point()); |
aoqi@0 | 661 | assert(!(x0 == 0 && _target != NULL), "correct encoding of null target"); |
aoqi@0 | 662 | p = pack_1_int_to(p, x0); |
aoqi@0 | 663 | } else { |
aoqi@0 | 664 | assert(_target != NULL, "sanity"); |
aoqi@0 | 665 | CodeSection* sect = dest->outer()->code_section(sindex); |
aoqi@0 | 666 | guarantee(sect->allocates2(_target), "must be in correct section"); |
aoqi@0 | 667 | address base = sect->start(); |
aoqi@0 | 668 | jint offset = scaled_offset(_target, base); |
aoqi@0 | 669 | assert((uint)sindex < (uint)CodeBuffer::SECT_LIMIT, "sanity"); |
aoqi@0 | 670 | assert(CodeBuffer::SECT_LIMIT <= (1 << section_width), "section_width++"); |
aoqi@0 | 671 | p = pack_1_int_to(p, (offset << section_width) | sindex); |
aoqi@0 | 672 | } |
aoqi@0 | 673 | |
aoqi@0 | 674 | dest->set_locs_end((relocInfo*) p); |
aoqi@0 | 675 | } |
aoqi@0 | 676 | |
aoqi@0 | 677 | |
aoqi@0 | 678 | void internal_word_Relocation::unpack_data() { |
aoqi@0 | 679 | jint x0 = unpack_1_int(); |
aoqi@0 | 680 | _target = x0==0? NULL: address_from_scaled_offset(x0, addr()); |
aoqi@0 | 681 | _section = CodeBuffer::SECT_NONE; |
aoqi@0 | 682 | } |
aoqi@0 | 683 | |
aoqi@0 | 684 | |
aoqi@0 | 685 | void section_word_Relocation::unpack_data() { |
aoqi@0 | 686 | jint x = unpack_1_int(); |
aoqi@0 | 687 | jint offset = (x >> section_width); |
aoqi@0 | 688 | int sindex = (x & ((1<<section_width)-1)); |
aoqi@0 | 689 | address base = binding()->section_start(sindex); |
aoqi@0 | 690 | |
aoqi@0 | 691 | _section = sindex; |
aoqi@0 | 692 | _target = address_from_scaled_offset(offset, base); |
aoqi@0 | 693 | } |
aoqi@0 | 694 | |
aoqi@0 | 695 | //// miscellaneous methods |
aoqi@0 | 696 | oop* oop_Relocation::oop_addr() { |
aoqi@0 | 697 | int n = _oop_index; |
aoqi@0 | 698 | if (n == 0) { |
aoqi@0 | 699 | // oop is stored in the code stream |
aoqi@0 | 700 | return (oop*) pd_address_in_code(); |
aoqi@0 | 701 | } else { |
aoqi@0 | 702 | // oop is stored in table at nmethod::oops_begin |
aoqi@0 | 703 | return code()->oop_addr_at(n); |
aoqi@0 | 704 | } |
aoqi@0 | 705 | } |
aoqi@0 | 706 | |
aoqi@0 | 707 | |
aoqi@0 | 708 | oop oop_Relocation::oop_value() { |
aoqi@0 | 709 | oop v = *oop_addr(); |
aoqi@0 | 710 | // clean inline caches store a special pseudo-null |
aoqi@0 | 711 | if (v == (oop)Universe::non_oop_word()) v = NULL; |
aoqi@0 | 712 | return v; |
aoqi@0 | 713 | } |
aoqi@0 | 714 | |
aoqi@0 | 715 | |
aoqi@0 | 716 | void oop_Relocation::fix_oop_relocation() { |
aoqi@0 | 717 | if (!oop_is_immediate()) { |
aoqi@0 | 718 | // get the oop from the pool, and re-insert it into the instruction: |
aoqi@0 | 719 | set_value(value()); |
aoqi@0 | 720 | } |
aoqi@0 | 721 | } |
aoqi@0 | 722 | |
aoqi@0 | 723 | |
aoqi@0 | 724 | void oop_Relocation::verify_oop_relocation() { |
aoqi@0 | 725 | if (!oop_is_immediate()) { |
aoqi@0 | 726 | // get the oop from the pool, and re-insert it into the instruction: |
aoqi@0 | 727 | verify_value(value()); |
aoqi@0 | 728 | } |
aoqi@0 | 729 | } |
aoqi@0 | 730 | |
aoqi@0 | 731 | // meta data versions |
aoqi@0 | 732 | Metadata** metadata_Relocation::metadata_addr() { |
aoqi@0 | 733 | int n = _metadata_index; |
aoqi@0 | 734 | if (n == 0) { |
aoqi@0 | 735 | // metadata is stored in the code stream |
aoqi@0 | 736 | return (Metadata**) pd_address_in_code(); |
aoqi@0 | 737 | } else { |
aoqi@0 | 738 | // metadata is stored in table at nmethod::metadatas_begin |
aoqi@0 | 739 | return code()->metadata_addr_at(n); |
aoqi@0 | 740 | } |
aoqi@0 | 741 | } |
aoqi@0 | 742 | |
aoqi@0 | 743 | |
aoqi@0 | 744 | Metadata* metadata_Relocation::metadata_value() { |
aoqi@0 | 745 | Metadata* v = *metadata_addr(); |
aoqi@0 | 746 | // clean inline caches store a special pseudo-null |
aoqi@0 | 747 | if (v == (Metadata*)Universe::non_oop_word()) v = NULL; |
aoqi@0 | 748 | return v; |
aoqi@0 | 749 | } |
aoqi@0 | 750 | |
aoqi@0 | 751 | |
aoqi@0 | 752 | void metadata_Relocation::fix_metadata_relocation() { |
aoqi@0 | 753 | if (!metadata_is_immediate()) { |
aoqi@0 | 754 | // get the metadata from the pool, and re-insert it into the instruction: |
aoqi@0 | 755 | pd_fix_value(value()); |
aoqi@0 | 756 | } |
aoqi@0 | 757 | } |
aoqi@0 | 758 | |
aoqi@0 | 759 | |
aoqi@0 | 760 | void metadata_Relocation::verify_metadata_relocation() { |
aoqi@0 | 761 | if (!metadata_is_immediate()) { |
aoqi@0 | 762 | // get the metadata from the pool, and re-insert it into the instruction: |
aoqi@0 | 763 | verify_value(value()); |
aoqi@0 | 764 | } |
aoqi@0 | 765 | } |
aoqi@0 | 766 | |
aoqi@0 | 767 | address virtual_call_Relocation::cached_value() { |
aoqi@0 | 768 | assert(_cached_value != NULL && _cached_value < addr(), "must precede ic_call"); |
aoqi@0 | 769 | return _cached_value; |
aoqi@0 | 770 | } |
aoqi@0 | 771 | |
aoqi@0 | 772 | |
aoqi@0 | 773 | void virtual_call_Relocation::clear_inline_cache() { |
aoqi@0 | 774 | // No stubs for ICs |
aoqi@0 | 775 | // Clean IC |
aoqi@0 | 776 | ResourceMark rm; |
aoqi@0 | 777 | CompiledIC* icache = CompiledIC_at(this); |
aoqi@0 | 778 | icache->set_to_clean(); |
aoqi@0 | 779 | } |
aoqi@0 | 780 | |
aoqi@0 | 781 | |
aoqi@0 | 782 | void opt_virtual_call_Relocation::clear_inline_cache() { |
aoqi@0 | 783 | // No stubs for ICs |
aoqi@0 | 784 | // Clean IC |
aoqi@0 | 785 | ResourceMark rm; |
aoqi@0 | 786 | CompiledIC* icache = CompiledIC_at(this); |
aoqi@0 | 787 | icache->set_to_clean(); |
aoqi@0 | 788 | } |
aoqi@0 | 789 | |
aoqi@0 | 790 | |
aoqi@0 | 791 | address opt_virtual_call_Relocation::static_stub() { |
aoqi@0 | 792 | // search for the static stub who points back to this static call |
aoqi@0 | 793 | address static_call_addr = addr(); |
aoqi@0 | 794 | RelocIterator iter(code()); |
aoqi@0 | 795 | while (iter.next()) { |
aoqi@0 | 796 | if (iter.type() == relocInfo::static_stub_type) { |
aoqi@0 | 797 | if (iter.static_stub_reloc()->static_call() == static_call_addr) { |
aoqi@0 | 798 | return iter.addr(); |
aoqi@0 | 799 | } |
aoqi@0 | 800 | } |
aoqi@0 | 801 | } |
aoqi@0 | 802 | return NULL; |
aoqi@0 | 803 | } |
aoqi@0 | 804 | |
aoqi@0 | 805 | |
aoqi@0 | 806 | void static_call_Relocation::clear_inline_cache() { |
aoqi@0 | 807 | // Safe call site info |
aoqi@0 | 808 | CompiledStaticCall* handler = compiledStaticCall_at(this); |
aoqi@0 | 809 | handler->set_to_clean(); |
aoqi@0 | 810 | } |
aoqi@0 | 811 | |
aoqi@0 | 812 | |
aoqi@0 | 813 | address static_call_Relocation::static_stub() { |
aoqi@0 | 814 | // search for the static stub who points back to this static call |
aoqi@0 | 815 | address static_call_addr = addr(); |
aoqi@0 | 816 | RelocIterator iter(code()); |
aoqi@0 | 817 | while (iter.next()) { |
aoqi@0 | 818 | if (iter.type() == relocInfo::static_stub_type) { |
aoqi@0 | 819 | if (iter.static_stub_reloc()->static_call() == static_call_addr) { |
aoqi@0 | 820 | return iter.addr(); |
aoqi@0 | 821 | } |
aoqi@0 | 822 | } |
aoqi@0 | 823 | } |
aoqi@0 | 824 | return NULL; |
aoqi@0 | 825 | } |
aoqi@0 | 826 | |
aoqi@0 | 827 | // Finds the trampoline address for a call. If no trampoline stub is |
aoqi@0 | 828 | // found NULL is returned which can be handled by the caller. |
aoqi@0 | 829 | address trampoline_stub_Relocation::get_trampoline_for(address call, nmethod* code) { |
aoqi@0 | 830 | // There are no relocations available when the code gets relocated |
aoqi@0 | 831 | // because of CodeBuffer expansion. |
aoqi@0 | 832 | if (code->relocation_size() == 0) |
aoqi@0 | 833 | return NULL; |
aoqi@0 | 834 | |
aoqi@0 | 835 | RelocIterator iter(code, call); |
aoqi@0 | 836 | while (iter.next()) { |
aoqi@0 | 837 | if (iter.type() == relocInfo::trampoline_stub_type) { |
aoqi@0 | 838 | if (iter.trampoline_stub_reloc()->owner() == call) { |
aoqi@0 | 839 | return iter.addr(); |
aoqi@0 | 840 | } |
aoqi@0 | 841 | } |
aoqi@0 | 842 | } |
aoqi@0 | 843 | |
aoqi@0 | 844 | return NULL; |
aoqi@0 | 845 | } |
aoqi@0 | 846 | |
aoqi@0 | 847 | void static_stub_Relocation::clear_inline_cache() { |
aoqi@0 | 848 | // Call stub is only used when calling the interpreted code. |
aoqi@0 | 849 | // It does not really need to be cleared, except that we want to clean out the methodoop. |
aoqi@0 | 850 | CompiledStaticCall::set_stub_to_clean(this); |
aoqi@0 | 851 | } |
aoqi@0 | 852 | |
aoqi@0 | 853 | |
aoqi@0 | 854 | void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { |
aoqi@0 | 855 | address target = _target; |
aoqi@0 | 856 | if (target == NULL) { |
aoqi@0 | 857 | // An absolute embedded reference to an external location, |
aoqi@0 | 858 | // which means there is nothing to fix here. |
aoqi@0 | 859 | return; |
aoqi@0 | 860 | } |
aoqi@0 | 861 | // Probably this reference is absolute, not relative, so the |
aoqi@0 | 862 | // following is probably a no-op. |
aoqi@0 | 863 | assert(src->section_index_of(target) == CodeBuffer::SECT_NONE, "sanity"); |
aoqi@0 | 864 | set_value(target); |
aoqi@0 | 865 | } |
aoqi@0 | 866 | |
aoqi@0 | 867 | |
aoqi@0 | 868 | address external_word_Relocation::target() { |
aoqi@0 | 869 | address target = _target; |
aoqi@0 | 870 | if (target == NULL) { |
aoqi@0 | 871 | target = pd_get_address_from_code(); |
aoqi@0 | 872 | } |
aoqi@0 | 873 | return target; |
aoqi@0 | 874 | } |
aoqi@0 | 875 | |
aoqi@0 | 876 | |
aoqi@0 | 877 | void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { |
aoqi@0 | 878 | address target = _target; |
aoqi@0 | 879 | if (target == NULL) { |
aoqi@0 | 880 | if (addr_in_const()) { |
aoqi@0 | 881 | target = new_addr_for(*(address*)addr(), src, dest); |
aoqi@0 | 882 | } else { |
aoqi@0 | 883 | target = new_addr_for(pd_get_address_from_code(), src, dest); |
aoqi@0 | 884 | } |
aoqi@0 | 885 | } |
aoqi@0 | 886 | set_value(target); |
aoqi@0 | 887 | } |
aoqi@0 | 888 | |
aoqi@0 | 889 | |
aoqi@0 | 890 | address internal_word_Relocation::target() { |
aoqi@0 | 891 | address target = _target; |
aoqi@0 | 892 | if (target == NULL) { |
aoqi@0 | 893 | target = pd_get_address_from_code(); |
aoqi@0 | 894 | } |
aoqi@0 | 895 | return target; |
aoqi@0 | 896 | } |
aoqi@0 | 897 | |
aoqi@0 | 898 | //--------------------------------------------------------------------------------- |
aoqi@0 | 899 | // Non-product code |
aoqi@0 | 900 | |
aoqi@0 | 901 | #ifndef PRODUCT |
aoqi@0 | 902 | |
aoqi@0 | 903 | static const char* reloc_type_string(relocInfo::relocType t) { |
aoqi@0 | 904 | switch (t) { |
aoqi@0 | 905 | #define EACH_CASE(name) \ |
aoqi@0 | 906 | case relocInfo::name##_type: \ |
aoqi@0 | 907 | return #name; |
aoqi@0 | 908 | |
aoqi@0 | 909 | APPLY_TO_RELOCATIONS(EACH_CASE); |
aoqi@0 | 910 | #undef EACH_CASE |
aoqi@0 | 911 | |
aoqi@0 | 912 | case relocInfo::none: |
aoqi@0 | 913 | return "none"; |
aoqi@0 | 914 | case relocInfo::data_prefix_tag: |
aoqi@0 | 915 | return "prefix"; |
aoqi@0 | 916 | default: |
aoqi@0 | 917 | return "UNKNOWN RELOC TYPE"; |
aoqi@0 | 918 | } |
aoqi@0 | 919 | } |
aoqi@0 | 920 | |
aoqi@0 | 921 | |
aoqi@0 | 922 | void RelocIterator::print_current() { |
aoqi@0 | 923 | if (!has_current()) { |
aoqi@0 | 924 | tty->print_cr("(no relocs)"); |
aoqi@0 | 925 | return; |
aoqi@0 | 926 | } |
aoqi@0 | 927 | tty->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT " offset=%d", |
aoqi@0 | 928 | _current, type(), reloc_type_string((relocInfo::relocType) type()), _addr, _current->addr_offset()); |
aoqi@0 | 929 | if (current()->format() != 0) |
aoqi@0 | 930 | tty->print(" format=%d", current()->format()); |
aoqi@0 | 931 | if (datalen() == 1) { |
aoqi@0 | 932 | tty->print(" data=%d", data()[0]); |
aoqi@0 | 933 | } else if (datalen() > 0) { |
aoqi@0 | 934 | tty->print(" data={"); |
aoqi@0 | 935 | for (int i = 0; i < datalen(); i++) { |
aoqi@0 | 936 | tty->print("%04x", data()[i] & 0xFFFF); |
aoqi@0 | 937 | } |
aoqi@0 | 938 | tty->print("}"); |
aoqi@0 | 939 | } |
aoqi@0 | 940 | tty->print("]"); |
aoqi@0 | 941 | switch (type()) { |
aoqi@0 | 942 | case relocInfo::oop_type: |
aoqi@0 | 943 | { |
aoqi@0 | 944 | oop_Relocation* r = oop_reloc(); |
aoqi@0 | 945 | oop* oop_addr = NULL; |
aoqi@0 | 946 | oop raw_oop = NULL; |
aoqi@0 | 947 | oop oop_value = NULL; |
aoqi@0 | 948 | if (code() != NULL || r->oop_is_immediate()) { |
aoqi@0 | 949 | oop_addr = r->oop_addr(); |
aoqi@0 | 950 | raw_oop = *oop_addr; |
aoqi@0 | 951 | oop_value = r->oop_value(); |
aoqi@0 | 952 | } |
aoqi@0 | 953 | tty->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", |
aoqi@0 | 954 | oop_addr, (address)raw_oop, r->offset()); |
aoqi@0 | 955 | // Do not print the oop by default--we want this routine to |
aoqi@0 | 956 | // work even during GC or other inconvenient times. |
aoqi@0 | 957 | if (WizardMode && oop_value != NULL) { |
aoqi@0 | 958 | tty->print("oop_value=" INTPTR_FORMAT ": ", (address)oop_value); |
aoqi@0 | 959 | oop_value->print_value_on(tty); |
aoqi@0 | 960 | } |
aoqi@0 | 961 | break; |
aoqi@0 | 962 | } |
aoqi@0 | 963 | case relocInfo::metadata_type: |
aoqi@0 | 964 | { |
aoqi@0 | 965 | metadata_Relocation* r = metadata_reloc(); |
aoqi@0 | 966 | Metadata** metadata_addr = NULL; |
aoqi@0 | 967 | Metadata* raw_metadata = NULL; |
aoqi@0 | 968 | Metadata* metadata_value = NULL; |
aoqi@0 | 969 | if (code() != NULL || r->metadata_is_immediate()) { |
aoqi@0 | 970 | metadata_addr = r->metadata_addr(); |
aoqi@0 | 971 | raw_metadata = *metadata_addr; |
aoqi@0 | 972 | metadata_value = r->metadata_value(); |
aoqi@0 | 973 | } |
aoqi@0 | 974 | tty->print(" | [metadata_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", |
aoqi@0 | 975 | metadata_addr, (address)raw_metadata, r->offset()); |
aoqi@0 | 976 | if (metadata_value != NULL) { |
aoqi@0 | 977 | tty->print("metadata_value=" INTPTR_FORMAT ": ", (address)metadata_value); |
aoqi@0 | 978 | metadata_value->print_value_on(tty); |
aoqi@0 | 979 | } |
aoqi@0 | 980 | break; |
aoqi@0 | 981 | } |
aoqi@0 | 982 | case relocInfo::external_word_type: |
aoqi@0 | 983 | case relocInfo::internal_word_type: |
aoqi@0 | 984 | case relocInfo::section_word_type: |
aoqi@0 | 985 | { |
aoqi@0 | 986 | DataRelocation* r = (DataRelocation*) reloc(); |
aoqi@0 | 987 | tty->print(" | [target=" INTPTR_FORMAT "]", r->value()); //value==target |
aoqi@0 | 988 | break; |
aoqi@0 | 989 | } |
aoqi@0 | 990 | case relocInfo::static_call_type: |
aoqi@0 | 991 | case relocInfo::runtime_call_type: |
aoqi@0 | 992 | { |
aoqi@0 | 993 | CallRelocation* r = (CallRelocation*) reloc(); |
aoqi@0 | 994 | tty->print(" | [destination=" INTPTR_FORMAT "]", r->destination()); |
aoqi@0 | 995 | break; |
aoqi@0 | 996 | } |
aoqi@0 | 997 | case relocInfo::virtual_call_type: |
aoqi@0 | 998 | { |
aoqi@0 | 999 | virtual_call_Relocation* r = (virtual_call_Relocation*) reloc(); |
aoqi@0 | 1000 | tty->print(" | [destination=" INTPTR_FORMAT " cached_value=" INTPTR_FORMAT "]", |
aoqi@0 | 1001 | r->destination(), r->cached_value()); |
aoqi@0 | 1002 | break; |
aoqi@0 | 1003 | } |
aoqi@0 | 1004 | case relocInfo::static_stub_type: |
aoqi@0 | 1005 | { |
aoqi@0 | 1006 | static_stub_Relocation* r = (static_stub_Relocation*) reloc(); |
aoqi@0 | 1007 | tty->print(" | [static_call=" INTPTR_FORMAT "]", r->static_call()); |
aoqi@0 | 1008 | break; |
aoqi@0 | 1009 | } |
aoqi@0 | 1010 | case relocInfo::trampoline_stub_type: |
aoqi@0 | 1011 | { |
aoqi@0 | 1012 | trampoline_stub_Relocation* r = (trampoline_stub_Relocation*) reloc(); |
aoqi@0 | 1013 | tty->print(" | [trampoline owner=" INTPTR_FORMAT "]", r->owner()); |
aoqi@0 | 1014 | break; |
aoqi@0 | 1015 | } |
aoqi@0 | 1016 | } |
aoqi@0 | 1017 | tty->cr(); |
aoqi@0 | 1018 | } |
aoqi@0 | 1019 | |
aoqi@0 | 1020 | |
aoqi@0 | 1021 | void RelocIterator::print() { |
aoqi@0 | 1022 | RelocIterator save_this = (*this); |
aoqi@0 | 1023 | relocInfo* scan = _current; |
aoqi@0 | 1024 | if (!has_current()) scan += 1; // nothing to scan here! |
aoqi@0 | 1025 | |
aoqi@0 | 1026 | bool skip_next = has_current(); |
aoqi@0 | 1027 | bool got_next; |
aoqi@0 | 1028 | while (true) { |
aoqi@0 | 1029 | got_next = (skip_next || next()); |
aoqi@0 | 1030 | skip_next = false; |
aoqi@0 | 1031 | |
aoqi@0 | 1032 | tty->print(" @" INTPTR_FORMAT ": ", scan); |
aoqi@0 | 1033 | relocInfo* newscan = _current+1; |
aoqi@0 | 1034 | if (!has_current()) newscan -= 1; // nothing to scan here! |
aoqi@0 | 1035 | while (scan < newscan) { |
aoqi@0 | 1036 | tty->print("%04x", *(short*)scan & 0xFFFF); |
aoqi@0 | 1037 | scan++; |
aoqi@0 | 1038 | } |
aoqi@0 | 1039 | tty->cr(); |
aoqi@0 | 1040 | |
aoqi@0 | 1041 | if (!got_next) break; |
aoqi@0 | 1042 | print_current(); |
aoqi@0 | 1043 | } |
aoqi@0 | 1044 | |
aoqi@0 | 1045 | (*this) = save_this; |
aoqi@0 | 1046 | } |
aoqi@0 | 1047 | |
aoqi@0 | 1048 | // For the debugger: |
aoqi@0 | 1049 | extern "C" |
aoqi@0 | 1050 | void print_blob_locs(nmethod* nm) { |
aoqi@0 | 1051 | nm->print(); |
aoqi@0 | 1052 | RelocIterator iter(nm); |
aoqi@0 | 1053 | iter.print(); |
aoqi@0 | 1054 | } |
aoqi@0 | 1055 | extern "C" |
aoqi@0 | 1056 | void print_buf_locs(CodeBuffer* cb) { |
aoqi@0 | 1057 | FlagSetting fs(PrintRelocations, true); |
aoqi@0 | 1058 | cb->print(); |
aoqi@0 | 1059 | } |
aoqi@0 | 1060 | #endif // !PRODUCT |