Mercurial > hg > graal-compiler
annotate src/share/vm/code/relocInfo.cpp @ 1762:0878d7bae69f
6961697: move nmethod constants section before instruction section
Summary: This is a preparation for 6961690.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Fri, 27 Aug 2010 01:51:27 -0700 |
| parents | 3e8fbc61cee8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1579 | 2 * Copyright (c) 1997, 2010, 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 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_relocInfo.cpp.incl" | |
| 27 | |
| 28 | |
| 29 const RelocationHolder RelocationHolder::none; // its type is relocInfo::none | |
| 30 | |
| 31 | |
| 32 // Implementation of relocInfo | |
| 33 | |
| 34 #ifdef ASSERT | |
| 35 relocInfo::relocInfo(relocType t, int off, int f) { | |
| 36 assert(t != data_prefix_tag, "cannot build a prefix this way"); | |
| 37 assert((t & type_mask) == t, "wrong type"); | |
| 38 assert((f & format_mask) == f, "wrong format"); | |
| 39 assert(off >= 0 && off < offset_limit(), "offset out off bounds"); | |
| 40 assert((off & (offset_unit-1)) == 0, "misaligned offset"); | |
| 41 (*this) = relocInfo(t, RAW_BITS, off, f); | |
| 42 } | |
| 43 #endif | |
| 44 | |
| 45 void relocInfo::initialize(CodeSection* dest, Relocation* reloc) { | |
| 46 relocInfo* data = this+1; // here's where the data might go | |
| 47 dest->set_locs_end(data); // sync end: the next call may read dest.locs_end | |
| 48 reloc->pack_data_to(dest); // maybe write data into locs, advancing locs_end | |
| 49 relocInfo* data_limit = dest->locs_end(); | |
| 50 if (data_limit > data) { | |
| 51 relocInfo suffix = (*this); | |
| 52 data_limit = this->finish_prefix((short*) data_limit); | |
| 53 // Finish up with the suffix. (Hack note: pack_data_to might edit this.) | |
| 54 *data_limit = suffix; | |
| 55 dest->set_locs_end(data_limit+1); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 relocInfo* relocInfo::finish_prefix(short* prefix_limit) { | |
| 60 assert(sizeof(relocInfo) == sizeof(short), "change this code"); | |
| 61 short* p = (short*)(this+1); | |
| 62 assert(prefix_limit >= p, "must be a valid span of data"); | |
| 63 int plen = prefix_limit - p; | |
| 64 if (plen == 0) { | |
| 65 debug_only(_value = 0xFFFF); | |
| 66 return this; // no data: remove self completely | |
| 67 } | |
| 68 if (plen == 1 && fits_into_immediate(p[0])) { | |
| 69 (*this) = immediate_relocInfo(p[0]); // move data inside self | |
| 70 return this+1; | |
| 71 } | |
| 72 // cannot compact, so just update the count and return the limit pointer | |
| 73 (*this) = prefix_relocInfo(plen); // write new datalen | |
| 74 assert(data() + datalen() == prefix_limit, "pointers must line up"); | |
| 75 return (relocInfo*)prefix_limit; | |
| 76 } | |
| 77 | |
| 78 | |
| 79 void relocInfo::set_type(relocType t) { | |
| 80 int old_offset = addr_offset(); | |
| 81 int old_format = format(); | |
| 82 (*this) = relocInfo(t, old_offset, old_format); | |
| 83 assert(type()==(int)t, "sanity check"); | |
| 84 assert(addr_offset()==old_offset, "sanity check"); | |
| 85 assert(format()==old_format, "sanity check"); | |
| 86 } | |
| 87 | |
| 88 | |
| 89 void relocInfo::set_format(int f) { | |
| 90 int old_offset = addr_offset(); | |
| 91 assert((f & format_mask) == f, "wrong format"); | |
| 92 _value = (_value & ~(format_mask << offset_width)) | (f << offset_width); | |
| 93 assert(addr_offset()==old_offset, "sanity check"); | |
| 94 } | |
| 95 | |
| 96 | |
| 97 void relocInfo::change_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type, relocType new_type) { | |
| 98 bool found = false; | |
| 99 while (itr->next() && !found) { | |
| 100 if (itr->addr() == pc) { | |
| 101 assert(itr->type()==old_type, "wrong relocInfo type found"); | |
| 102 itr->current()->set_type(new_type); | |
| 103 found=true; | |
| 104 } | |
| 105 } | |
| 106 assert(found, "no relocInfo found for pc"); | |
| 107 } | |
| 108 | |
| 109 | |
| 110 void relocInfo::remove_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type) { | |
| 111 change_reloc_info_for_address(itr, pc, old_type, none); | |
| 112 } | |
| 113 | |
| 114 | |
| 115 // ---------------------------------------------------------------------------------------------------- | |
| 116 // Implementation of RelocIterator | |
| 117 | |
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118 void RelocIterator::initialize(nmethod* nm, address begin, address limit) { |
| 0 | 119 initialize_misc(); |
| 120 | |
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121 if (nm == NULL && begin != NULL) { |
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122 // allow nmethod to be deduced from beginning address |
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123 CodeBlob* cb = CodeCache::find_blob(begin); |
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124 nm = cb->as_nmethod_or_null(); |
| 0 | 125 } |
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126 assert(nm != NULL, "must be able to deduce nmethod from other arguments"); |
| 0 | 127 |
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128 _code = nm; |
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129 _current = nm->relocation_begin() - 1; |
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130 _end = nm->relocation_end(); |
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131 _addr = nm->content_begin(); |
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132 |
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133 // Initialize code sections. |
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134 _section_start[CodeBuffer::SECT_CONSTS] = nm->consts_begin(); |
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135 _section_start[CodeBuffer::SECT_INSTS ] = nm->insts_begin() ; |
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136 _section_start[CodeBuffer::SECT_STUBS ] = nm->stub_begin() ; |
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137 |
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138 _section_end [CodeBuffer::SECT_CONSTS] = nm->consts_end() ; |
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139 _section_end [CodeBuffer::SECT_INSTS ] = nm->insts_end() ; |
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140 _section_end [CodeBuffer::SECT_STUBS ] = nm->stub_end() ; |
| 0 | 141 |
| 142 assert(!has_current(), "just checking"); | |
| 1748 | 143 assert(begin == NULL || begin >= nm->code_begin(), "in bounds"); |
| 144 assert(limit == NULL || limit <= nm->code_end(), "in bounds"); | |
| 0 | 145 set_limits(begin, limit); |
| 146 } | |
| 147 | |
| 148 | |
| 149 RelocIterator::RelocIterator(CodeSection* cs, address begin, address limit) { | |
| 150 initialize_misc(); | |
| 151 | |
| 152 _current = cs->locs_start()-1; | |
| 153 _end = cs->locs_end(); | |
| 154 _addr = cs->start(); | |
| 155 _code = NULL; // Not cb->blob(); | |
| 156 | |
| 157 CodeBuffer* cb = cs->outer(); | |
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158 assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal"); |
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159 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) { |
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160 CodeSection* cs = cb->code_section(n); |
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161 _section_start[n] = cs->start(); |
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162 _section_end [n] = cs->end(); |
| 0 | 163 } |
| 164 | |
| 165 assert(!has_current(), "just checking"); | |
| 166 | |
| 167 assert(begin == NULL || begin >= cs->start(), "in bounds"); | |
| 168 assert(limit == NULL || limit <= cs->end(), "in bounds"); | |
| 169 set_limits(begin, limit); | |
| 170 } | |
| 171 | |
| 172 | |
| 173 enum { indexCardSize = 128 }; | |
| 174 struct RelocIndexEntry { | |
| 175 jint addr_offset; // offset from header_end of an addr() | |
| 176 jint reloc_offset; // offset from header_end of a relocInfo (prefix) | |
| 177 }; | |
| 178 | |
| 179 | |
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180 bool RelocIterator::addr_in_const() const { |
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181 const int n = CodeBuffer::SECT_CONSTS; |
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182 return section_start(n) <= addr() && addr() < section_end(n); |
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183 } |
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184 |
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185 |
| 0 | 186 static inline int num_cards(int code_size) { |
| 187 return (code_size-1) / indexCardSize; | |
| 188 } | |
| 189 | |
| 190 | |
| 191 int RelocIterator::locs_and_index_size(int code_size, int locs_size) { | |
| 192 if (!UseRelocIndex) return locs_size; // no index | |
| 193 code_size = round_to(code_size, oopSize); | |
| 194 locs_size = round_to(locs_size, oopSize); | |
| 195 int index_size = num_cards(code_size) * sizeof(RelocIndexEntry); | |
| 196 // format of indexed relocs: | |
| 197 // relocation_begin: relocInfo ... | |
| 198 // index: (addr,reloc#) ... | |
| 199 // indexSize :relocation_end | |
| 200 return locs_size + index_size + BytesPerInt; | |
| 201 } | |
| 202 | |
| 203 | |
| 204 void RelocIterator::create_index(relocInfo* dest_begin, int dest_count, relocInfo* dest_end) { | |
| 205 address relocation_begin = (address)dest_begin; | |
| 206 address relocation_end = (address)dest_end; | |
| 207 int total_size = relocation_end - relocation_begin; | |
| 208 int locs_size = dest_count * sizeof(relocInfo); | |
| 209 if (!UseRelocIndex) { | |
| 210 Copy::fill_to_bytes(relocation_begin + locs_size, total_size-locs_size, 0); | |
| 211 return; | |
| 212 } | |
| 213 int index_size = total_size - locs_size - BytesPerInt; // find out how much space is left | |
| 214 int ncards = index_size / sizeof(RelocIndexEntry); | |
| 215 assert(total_size == locs_size + index_size + BytesPerInt, "checkin'"); | |
| 216 assert(index_size >= 0 && index_size % sizeof(RelocIndexEntry) == 0, "checkin'"); | |
| 217 jint* index_size_addr = (jint*)relocation_end - 1; | |
| 218 | |
| 219 assert(sizeof(jint) == BytesPerInt, "change this code"); | |
| 220 | |
| 221 *index_size_addr = index_size; | |
| 222 if (index_size != 0) { | |
| 223 assert(index_size > 0, "checkin'"); | |
| 224 | |
| 225 RelocIndexEntry* index = (RelocIndexEntry *)(relocation_begin + locs_size); | |
| 226 assert(index == (RelocIndexEntry*)index_size_addr - ncards, "checkin'"); | |
| 227 | |
| 228 // walk over the relocations, and fill in index entries as we go | |
| 229 RelocIterator iter; | |
| 230 const address initial_addr = NULL; | |
| 231 relocInfo* const initial_current = dest_begin - 1; // biased by -1 like elsewhere | |
| 232 | |
| 233 iter._code = NULL; | |
| 234 iter._addr = initial_addr; | |
| 235 iter._limit = (address)(intptr_t)(ncards * indexCardSize); | |
| 236 iter._current = initial_current; | |
| 237 iter._end = dest_begin + dest_count; | |
| 238 | |
| 239 int i = 0; | |
| 240 address next_card_addr = (address)indexCardSize; | |
| 241 int addr_offset = 0; | |
| 242 int reloc_offset = 0; | |
| 243 while (true) { | |
| 244 // Checkpoint the iterator before advancing it. | |
| 245 addr_offset = iter._addr - initial_addr; | |
| 246 reloc_offset = iter._current - initial_current; | |
| 247 if (!iter.next()) break; | |
| 248 while (iter.addr() >= next_card_addr) { | |
| 249 index[i].addr_offset = addr_offset; | |
| 250 index[i].reloc_offset = reloc_offset; | |
| 251 i++; | |
| 252 next_card_addr += indexCardSize; | |
| 253 } | |
| 254 } | |
| 255 while (i < ncards) { | |
| 256 index[i].addr_offset = addr_offset; | |
| 257 index[i].reloc_offset = reloc_offset; | |
| 258 i++; | |
| 259 } | |
| 260 } | |
| 261 } | |
| 262 | |
| 263 | |
| 264 void RelocIterator::set_limits(address begin, address limit) { | |
| 265 int index_size = 0; | |
| 266 if (UseRelocIndex && _code != NULL) { | |
| 267 index_size = ((jint*)_end)[-1]; | |
| 268 _end = (relocInfo*)( (address)_end - index_size - BytesPerInt ); | |
| 269 } | |
| 270 | |
| 271 _limit = limit; | |
| 272 | |
| 273 // the limit affects this next stuff: | |
| 274 if (begin != NULL) { | |
| 275 #ifdef ASSERT | |
| 276 // In ASSERT mode we do not actually use the index, but simply | |
| 277 // check that its contents would have led us to the right answer. | |
| 278 address addrCheck = _addr; | |
| 279 relocInfo* infoCheck = _current; | |
| 280 #endif // ASSERT | |
| 281 if (index_size > 0) { | |
| 282 // skip ahead | |
| 283 RelocIndexEntry* index = (RelocIndexEntry*)_end; | |
| 284 RelocIndexEntry* index_limit = (RelocIndexEntry*)((address)index + index_size); | |
| 1748 | 285 assert(_addr == _code->code_begin(), "_addr must be unadjusted"); |
| 0 | 286 int card = (begin - _addr) / indexCardSize; |
| 287 if (card > 0) { | |
| 288 if (index+card-1 < index_limit) index += card-1; | |
| 289 else index = index_limit - 1; | |
| 290 #ifdef ASSERT | |
| 291 addrCheck = _addr + index->addr_offset; | |
| 292 infoCheck = _current + index->reloc_offset; | |
| 293 #else | |
| 294 // Advance the iterator immediately to the last valid state | |
| 295 // for the previous card. Calling "next" will then advance | |
| 296 // it to the first item on the required card. | |
| 297 _addr += index->addr_offset; | |
| 298 _current += index->reloc_offset; | |
| 299 #endif // ASSERT | |
| 300 } | |
| 301 } | |
| 302 | |
| 303 relocInfo* backup; | |
| 304 address backup_addr; | |
| 305 while (true) { | |
| 306 backup = _current; | |
| 307 backup_addr = _addr; | |
| 308 #ifdef ASSERT | |
| 309 if (backup == infoCheck) { | |
| 310 assert(backup_addr == addrCheck, "must match"); addrCheck = NULL; infoCheck = NULL; | |
| 311 } else { | |
| 312 assert(addrCheck == NULL || backup_addr <= addrCheck, "must not pass addrCheck"); | |
| 313 } | |
| 314 #endif // ASSERT | |
| 315 if (!next() || addr() >= begin) break; | |
| 316 } | |
| 317 assert(addrCheck == NULL || addrCheck == backup_addr, "must have matched addrCheck"); | |
| 318 assert(infoCheck == NULL || infoCheck == backup, "must have matched infoCheck"); | |
| 319 // At this point, either we are at the first matching record, | |
| 320 // or else there is no such record, and !has_current(). | |
| 321 // In either case, revert to the immediatly preceding state. | |
| 322 _current = backup; | |
| 323 _addr = backup_addr; | |
| 324 set_has_current(false); | |
| 325 } | |
| 326 } | |
| 327 | |
| 328 | |
| 329 void RelocIterator::set_limit(address limit) { | |
| 330 address code_end = (address)code() + code()->size(); | |
| 331 assert(limit == NULL || limit <= code_end, "in bounds"); | |
| 332 _limit = limit; | |
| 333 } | |
| 334 | |
| 335 | |
| 336 void PatchingRelocIterator:: prepass() { | |
| 337 // turn breakpoints off during patching | |
| 338 _init_state = (*this); // save cursor | |
| 339 while (next()) { | |
| 340 if (type() == relocInfo::breakpoint_type) { | |
| 341 breakpoint_reloc()->set_active(false); | |
| 342 } | |
| 343 } | |
| 344 (RelocIterator&)(*this) = _init_state; // reset cursor for client | |
| 345 } | |
| 346 | |
| 347 | |
| 348 void PatchingRelocIterator:: postpass() { | |
| 349 // turn breakpoints back on after patching | |
| 350 (RelocIterator&)(*this) = _init_state; // reset cursor again | |
| 351 while (next()) { | |
| 352 if (type() == relocInfo::breakpoint_type) { | |
| 353 breakpoint_Relocation* bpt = breakpoint_reloc(); | |
| 354 bpt->set_active(bpt->enabled()); | |
| 355 } | |
| 356 } | |
| 357 } | |
| 358 | |
| 359 | |
| 360 // All the strange bit-encodings are in here. | |
| 361 // The idea is to encode relocation data which are small integers | |
| 362 // very efficiently (a single extra halfword). Larger chunks of | |
| 363 // relocation data need a halfword header to hold their size. | |
| 364 void RelocIterator::advance_over_prefix() { | |
| 365 if (_current->is_datalen()) { | |
| 366 _data = (short*) _current->data(); | |
| 367 _datalen = _current->datalen(); | |
| 368 _current += _datalen + 1; // skip the embedded data & header | |
| 369 } else { | |
| 370 _databuf = _current->immediate(); | |
| 371 _data = &_databuf; | |
| 372 _datalen = 1; | |
| 373 _current++; // skip the header | |
| 374 } | |
| 375 // The client will see the following relocInfo, whatever that is. | |
| 376 // It is the reloc to which the preceding data applies. | |
| 377 } | |
| 378 | |
| 379 | |
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380 void RelocIterator::initialize_misc() { |
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381 set_has_current(false); |
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382 for (int i = (int) CodeBuffer::SECT_FIRST; i < (int) CodeBuffer::SECT_LIMIT; i++) { |
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383 _section_start[i] = NULL; // these will be lazily computed, if needed |
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384 _section_end [i] = NULL; |
| 0 | 385 } |
| 386 } | |
| 387 | |
| 388 | |
| 389 Relocation* RelocIterator::reloc() { | |
| 390 // (take the "switch" out-of-line) | |
| 391 relocInfo::relocType t = type(); | |
| 392 if (false) {} | |
| 393 #define EACH_TYPE(name) \ | |
| 394 else if (t == relocInfo::name##_type) { \ | |
| 395 return name##_reloc(); \ | |
| 396 } | |
| 397 APPLY_TO_RELOCATIONS(EACH_TYPE); | |
| 398 #undef EACH_TYPE | |
| 399 assert(t == relocInfo::none, "must be padding"); | |
| 400 return new(_rh) Relocation(); | |
| 401 } | |
| 402 | |
| 403 | |
| 404 //////// Methods for flyweight Relocation types | |
| 405 | |
| 406 | |
| 407 RelocationHolder RelocationHolder::plus(int offset) const { | |
| 408 if (offset != 0) { | |
| 409 switch (type()) { | |
| 410 case relocInfo::none: | |
| 411 break; | |
| 412 case relocInfo::oop_type: | |
| 413 { | |
| 414 oop_Relocation* r = (oop_Relocation*)reloc(); | |
| 415 return oop_Relocation::spec(r->oop_index(), r->offset() + offset); | |
| 416 } | |
| 417 default: | |
| 418 ShouldNotReachHere(); | |
| 419 } | |
| 420 } | |
| 421 return (*this); | |
| 422 } | |
| 423 | |
| 424 | |
| 425 void Relocation::guarantee_size() { | |
| 426 guarantee(false, "Make _relocbuf bigger!"); | |
| 427 } | |
| 428 | |
| 429 // some relocations can compute their own values | |
| 430 address Relocation::value() { | |
| 431 ShouldNotReachHere(); | |
| 432 return NULL; | |
| 433 } | |
| 434 | |
| 435 | |
| 436 void Relocation::set_value(address x) { | |
| 437 ShouldNotReachHere(); | |
| 438 } | |
| 439 | |
| 440 | |
| 441 RelocationHolder Relocation::spec_simple(relocInfo::relocType rtype) { | |
| 442 if (rtype == relocInfo::none) return RelocationHolder::none; | |
| 443 relocInfo ri = relocInfo(rtype, 0); | |
| 444 RelocIterator itr; | |
| 445 itr.set_current(ri); | |
| 446 itr.reloc(); | |
| 447 return itr._rh; | |
| 448 } | |
| 449 | |
| 450 | |
| 451 static inline bool is_index(intptr_t index) { | |
| 452 return 0 < index && index < os::vm_page_size(); | |
| 453 } | |
| 454 | |
| 455 | |
| 456 int32_t Relocation::runtime_address_to_index(address runtime_address) { | |
| 457 assert(!is_index((intptr_t)runtime_address), "must not look like an index"); | |
| 458 | |
| 459 if (runtime_address == NULL) return 0; | |
| 460 | |
| 461 StubCodeDesc* p = StubCodeDesc::desc_for(runtime_address); | |
| 462 if (p != NULL && p->begin() == runtime_address) { | |
| 463 assert(is_index(p->index()), "there must not be too many stubs"); | |
| 464 return (int32_t)p->index(); | |
| 465 } else { | |
| 466 // Known "miscellaneous" non-stub pointers: | |
| 467 // os::get_polling_page(), SafepointSynchronize::address_of_state() | |
| 468 if (PrintRelocations) { | |
| 469 tty->print_cr("random unregistered address in relocInfo: " INTPTR_FORMAT, runtime_address); | |
| 470 } | |
| 471 #ifndef _LP64 | |
| 472 return (int32_t) (intptr_t)runtime_address; | |
| 473 #else | |
| 474 // didn't fit return non-index | |
| 475 return -1; | |
| 476 #endif /* _LP64 */ | |
| 477 } | |
| 478 } | |
| 479 | |
| 480 | |
| 481 address Relocation::index_to_runtime_address(int32_t index) { | |
| 482 if (index == 0) return NULL; | |
| 483 | |
| 484 if (is_index(index)) { | |
| 485 StubCodeDesc* p = StubCodeDesc::desc_for_index(index); | |
| 486 assert(p != NULL, "there must be a stub for this index"); | |
| 487 return p->begin(); | |
| 488 } else { | |
| 489 #ifndef _LP64 | |
| 490 // this only works on 32bit machines | |
| 491 return (address) ((intptr_t) index); | |
| 492 #else | |
| 493 fatal("Relocation::index_to_runtime_address, int32_t not pointer sized"); | |
| 494 return NULL; | |
| 495 #endif /* _LP64 */ | |
| 496 } | |
| 497 } | |
| 498 | |
| 499 address Relocation::old_addr_for(address newa, | |
| 500 const CodeBuffer* src, CodeBuffer* dest) { | |
| 501 int sect = dest->section_index_of(newa); | |
| 502 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
| 503 address ostart = src->code_section(sect)->start(); | |
| 504 address nstart = dest->code_section(sect)->start(); | |
| 505 return ostart + (newa - nstart); | |
| 506 } | |
| 507 | |
| 508 address Relocation::new_addr_for(address olda, | |
| 509 const CodeBuffer* src, CodeBuffer* dest) { | |
| 510 debug_only(const CodeBuffer* src0 = src); | |
| 511 int sect = CodeBuffer::SECT_NONE; | |
| 512 // Look for olda in the source buffer, and all previous incarnations | |
| 513 // if the source buffer has been expanded. | |
| 514 for (; src != NULL; src = src->before_expand()) { | |
| 515 sect = src->section_index_of(olda); | |
| 516 if (sect != CodeBuffer::SECT_NONE) break; | |
| 517 } | |
| 518 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
| 519 address ostart = src->code_section(sect)->start(); | |
| 520 address nstart = dest->code_section(sect)->start(); | |
| 521 return nstart + (olda - ostart); | |
| 522 } | |
| 523 | |
| 524 void Relocation::normalize_address(address& addr, const CodeSection* dest, bool allow_other_sections) { | |
| 525 address addr0 = addr; | |
| 526 if (addr0 == NULL || dest->allocates2(addr0)) return; | |
| 527 CodeBuffer* cb = dest->outer(); | |
| 528 addr = new_addr_for(addr0, cb, cb); | |
| 529 assert(allow_other_sections || dest->contains2(addr), | |
| 530 "addr must be in required section"); | |
| 531 } | |
| 532 | |
| 533 | |
| 534 void CallRelocation::set_destination(address x) { | |
| 535 pd_set_call_destination(x); | |
| 536 } | |
| 537 | |
| 538 void CallRelocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 539 // Usually a self-relative reference to an external routine. | |
| 540 // On some platforms, the reference is absolute (not self-relative). | |
| 541 // The enhanced use of pd_call_destination sorts this all out. | |
| 542 address orig_addr = old_addr_for(addr(), src, dest); | |
| 543 address callee = pd_call_destination(orig_addr); | |
| 544 // Reassert the callee address, this time in the new copy of the code. | |
| 545 pd_set_call_destination(callee); | |
| 546 } | |
| 547 | |
| 548 | |
| 549 //// pack/unpack methods | |
| 550 | |
| 551 void oop_Relocation::pack_data_to(CodeSection* dest) { | |
| 552 short* p = (short*) dest->locs_end(); | |
| 553 p = pack_2_ints_to(p, _oop_index, _offset); | |
| 554 dest->set_locs_end((relocInfo*) p); | |
| 555 } | |
| 556 | |
| 557 | |
| 558 void oop_Relocation::unpack_data() { | |
| 559 unpack_2_ints(_oop_index, _offset); | |
| 560 } | |
| 561 | |
| 562 | |
| 563 void virtual_call_Relocation::pack_data_to(CodeSection* dest) { | |
| 564 short* p = (short*) dest->locs_end(); | |
| 565 address point = dest->locs_point(); | |
| 566 | |
| 567 // Try to make a pointer NULL first. | |
| 568 if (_oop_limit >= point && | |
| 569 _oop_limit <= point + NativeCall::instruction_size) { | |
| 570 _oop_limit = NULL; | |
| 571 } | |
| 572 // If the _oop_limit is NULL, it "defaults" to the end of the call. | |
| 573 // See ic_call_Relocation::oop_limit() below. | |
| 574 | |
| 575 normalize_address(_first_oop, dest); | |
| 576 normalize_address(_oop_limit, dest); | |
| 577 jint x0 = scaled_offset_null_special(_first_oop, point); | |
| 578 jint x1 = scaled_offset_null_special(_oop_limit, point); | |
| 579 p = pack_2_ints_to(p, x0, x1); | |
| 580 dest->set_locs_end((relocInfo*) p); | |
| 581 } | |
| 582 | |
| 583 | |
| 584 void virtual_call_Relocation::unpack_data() { | |
| 585 jint x0, x1; unpack_2_ints(x0, x1); | |
| 586 address point = addr(); | |
| 587 _first_oop = x0==0? NULL: address_from_scaled_offset(x0, point); | |
| 588 _oop_limit = x1==0? NULL: address_from_scaled_offset(x1, point); | |
| 589 } | |
| 590 | |
| 591 | |
| 592 void static_stub_Relocation::pack_data_to(CodeSection* dest) { | |
| 593 short* p = (short*) dest->locs_end(); | |
| 594 CodeSection* insts = dest->outer()->insts(); | |
| 595 normalize_address(_static_call, insts); | |
| 596 p = pack_1_int_to(p, scaled_offset(_static_call, insts->start())); | |
| 597 dest->set_locs_end((relocInfo*) p); | |
| 598 } | |
| 599 | |
| 600 void static_stub_Relocation::unpack_data() { | |
| 601 address base = binding()->section_start(CodeBuffer::SECT_INSTS); | |
| 602 _static_call = address_from_scaled_offset(unpack_1_int(), base); | |
| 603 } | |
| 604 | |
| 605 | |
| 606 void external_word_Relocation::pack_data_to(CodeSection* dest) { | |
| 607 short* p = (short*) dest->locs_end(); | |
| 608 int32_t index = runtime_address_to_index(_target); | |
| 609 #ifndef _LP64 | |
| 610 p = pack_1_int_to(p, index); | |
| 611 #else | |
| 612 if (is_index(index)) { | |
| 613 p = pack_2_ints_to(p, index, 0); | |
| 614 } else { | |
| 615 jlong t = (jlong) _target; | |
| 616 int32_t lo = low(t); | |
| 617 int32_t hi = high(t); | |
| 618 p = pack_2_ints_to(p, lo, hi); | |
| 619 DEBUG_ONLY(jlong t1 = jlong_from(hi, lo)); | |
| 620 assert(!is_index(t1) && (address) t1 == _target, "not symmetric"); | |
| 621 } | |
| 622 #endif /* _LP64 */ | |
| 623 dest->set_locs_end((relocInfo*) p); | |
| 624 } | |
| 625 | |
| 626 | |
| 627 void external_word_Relocation::unpack_data() { | |
| 628 #ifndef _LP64 | |
| 629 _target = index_to_runtime_address(unpack_1_int()); | |
| 630 #else | |
| 631 int32_t lo, hi; | |
| 632 unpack_2_ints(lo, hi); | |
| 633 jlong t = jlong_from(hi, lo);; | |
| 634 if (is_index(t)) { | |
| 635 _target = index_to_runtime_address(t); | |
| 636 } else { | |
| 637 _target = (address) t; | |
| 638 } | |
| 639 #endif /* _LP64 */ | |
| 640 } | |
| 641 | |
| 642 | |
| 643 void internal_word_Relocation::pack_data_to(CodeSection* dest) { | |
| 644 short* p = (short*) dest->locs_end(); | |
| 645 normalize_address(_target, dest, true); | |
| 646 | |
| 647 // Check whether my target address is valid within this section. | |
| 648 // If not, strengthen the relocation type to point to another section. | |
| 649 int sindex = _section; | |
| 650 if (sindex == CodeBuffer::SECT_NONE && _target != NULL | |
| 651 && (!dest->allocates(_target) || _target == dest->locs_point())) { | |
| 652 sindex = dest->outer()->section_index_of(_target); | |
| 653 guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere"); | |
| 654 relocInfo* base = dest->locs_end() - 1; | |
| 655 assert(base->type() == this->type(), "sanity"); | |
| 656 // Change the written type, to be section_word_type instead. | |
| 657 base->set_type(relocInfo::section_word_type); | |
| 658 } | |
| 659 | |
| 660 // Note: An internal_word relocation cannot refer to its own instruction, | |
| 661 // because we reserve "0" to mean that the pointer itself is embedded | |
| 662 // in the code stream. We use a section_word relocation for such cases. | |
| 663 | |
| 664 if (sindex == CodeBuffer::SECT_NONE) { | |
| 665 assert(type() == relocInfo::internal_word_type, "must be base class"); | |
| 666 guarantee(_target == NULL || dest->allocates2(_target), "must be within the given code section"); | |
| 667 jint x0 = scaled_offset_null_special(_target, dest->locs_point()); | |
| 668 assert(!(x0 == 0 && _target != NULL), "correct encoding of null target"); | |
| 669 p = pack_1_int_to(p, x0); | |
| 670 } else { | |
| 671 assert(_target != NULL, "sanity"); | |
| 672 CodeSection* sect = dest->outer()->code_section(sindex); | |
| 673 guarantee(sect->allocates2(_target), "must be in correct section"); | |
| 674 address base = sect->start(); | |
| 675 jint offset = scaled_offset(_target, base); | |
| 676 assert((uint)sindex < (uint)CodeBuffer::SECT_LIMIT, "sanity"); | |
| 677 assert(CodeBuffer::SECT_LIMIT <= (1 << section_width), "section_width++"); | |
| 678 p = pack_1_int_to(p, (offset << section_width) | sindex); | |
| 679 } | |
| 680 | |
| 681 dest->set_locs_end((relocInfo*) p); | |
| 682 } | |
| 683 | |
| 684 | |
| 685 void internal_word_Relocation::unpack_data() { | |
| 686 jint x0 = unpack_1_int(); | |
| 687 _target = x0==0? NULL: address_from_scaled_offset(x0, addr()); | |
| 688 _section = CodeBuffer::SECT_NONE; | |
| 689 } | |
| 690 | |
| 691 | |
| 692 void section_word_Relocation::unpack_data() { | |
| 693 jint x = unpack_1_int(); | |
| 694 jint offset = (x >> section_width); | |
| 695 int sindex = (x & ((1<<section_width)-1)); | |
| 696 address base = binding()->section_start(sindex); | |
| 697 | |
| 698 _section = sindex; | |
| 699 _target = address_from_scaled_offset(offset, base); | |
| 700 } | |
| 701 | |
| 702 | |
| 703 void breakpoint_Relocation::pack_data_to(CodeSection* dest) { | |
| 704 short* p = (short*) dest->locs_end(); | |
| 705 address point = dest->locs_point(); | |
| 706 | |
| 707 *p++ = _bits; | |
| 708 | |
| 709 assert(_target != NULL, "sanity"); | |
| 710 | |
| 711 if (internal()) normalize_address(_target, dest); | |
| 712 | |
| 713 jint target_bits = | |
| 714 (jint)( internal() ? scaled_offset (_target, point) | |
| 715 : runtime_address_to_index(_target) ); | |
| 716 if (settable()) { | |
| 717 // save space for set_target later | |
| 718 p = add_jint(p, target_bits); | |
| 719 } else { | |
| 720 p = add_var_int(p, target_bits); | |
| 721 } | |
| 722 | |
| 723 for (int i = 0; i < instrlen(); i++) { | |
| 724 // put placeholder words until bytes can be saved | |
| 725 p = add_short(p, (short)0x7777); | |
| 726 } | |
| 727 | |
| 728 dest->set_locs_end((relocInfo*) p); | |
| 729 } | |
| 730 | |
| 731 | |
| 732 void breakpoint_Relocation::unpack_data() { | |
| 733 _bits = live_bits(); | |
| 734 | |
| 735 int targetlen = datalen() - 1 - instrlen(); | |
| 736 jint target_bits = 0; | |
| 737 if (targetlen == 0) target_bits = 0; | |
| 738 else if (targetlen == 1) target_bits = *(data()+1); | |
| 739 else if (targetlen == 2) target_bits = relocInfo::jint_from_data(data()+1); | |
| 740 else { ShouldNotReachHere(); } | |
| 741 | |
| 742 _target = internal() ? address_from_scaled_offset(target_bits, addr()) | |
| 743 : index_to_runtime_address (target_bits); | |
| 744 } | |
| 745 | |
| 746 | |
| 747 //// miscellaneous methods | |
| 748 oop* oop_Relocation::oop_addr() { | |
| 749 int n = _oop_index; | |
| 750 if (n == 0) { | |
| 751 // oop is stored in the code stream | |
| 752 return (oop*) pd_address_in_code(); | |
| 753 } else { | |
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754 // oop is stored in table at nmethod::oops_begin |
| 0 | 755 return code()->oop_addr_at(n); |
| 756 } | |
| 757 } | |
| 758 | |
| 759 | |
| 760 oop oop_Relocation::oop_value() { | |
| 761 oop v = *oop_addr(); | |
| 762 // clean inline caches store a special pseudo-null | |
| 763 if (v == (oop)Universe::non_oop_word()) v = NULL; | |
| 764 return v; | |
| 765 } | |
| 766 | |
| 767 | |
| 768 void oop_Relocation::fix_oop_relocation() { | |
| 769 if (!oop_is_immediate()) { | |
| 770 // get the oop from the pool, and re-insert it into the instruction: | |
| 771 set_value(value()); | |
| 772 } | |
| 773 } | |
| 774 | |
| 775 | |
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776 RelocIterator virtual_call_Relocation::parse_ic(nmethod* &nm, address &ic_call, address &first_oop, |
| 0 | 777 oop* &oop_addr, bool *is_optimized) { |
| 778 assert(ic_call != NULL, "ic_call address must be set"); | |
| 779 assert(ic_call != NULL || first_oop != NULL, "must supply a non-null input"); | |
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780 if (nm == NULL) { |
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781 CodeBlob* code; |
| 0 | 782 if (ic_call != NULL) { |
| 783 code = CodeCache::find_blob(ic_call); | |
| 784 } else if (first_oop != NULL) { | |
| 785 code = CodeCache::find_blob(first_oop); | |
| 786 } | |
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787 nm = code->as_nmethod_or_null(); |
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788 assert(nm != NULL, "address to parse must be in nmethod"); |
| 0 | 789 } |
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790 assert(ic_call == NULL || nm->contains(ic_call), "must be in nmethod"); |
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791 assert(first_oop == NULL || nm->contains(first_oop), "must be in nmethod"); |
| 0 | 792 |
| 793 address oop_limit = NULL; | |
| 794 | |
| 795 if (ic_call != NULL) { | |
| 796 // search for the ic_call at the given address | |
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797 RelocIterator iter(nm, ic_call, ic_call+1); |
| 0 | 798 bool ret = iter.next(); |
| 799 assert(ret == true, "relocInfo must exist at this address"); | |
| 800 assert(iter.addr() == ic_call, "must find ic_call"); | |
| 801 if (iter.type() == relocInfo::virtual_call_type) { | |
| 802 virtual_call_Relocation* r = iter.virtual_call_reloc(); | |
| 803 first_oop = r->first_oop(); | |
| 804 oop_limit = r->oop_limit(); | |
| 805 *is_optimized = false; | |
| 806 } else { | |
| 807 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); | |
| 808 *is_optimized = true; | |
| 809 oop_addr = NULL; | |
| 810 first_oop = NULL; | |
| 811 return iter; | |
| 812 } | |
| 813 } | |
| 814 | |
| 815 // search for the first_oop, to get its oop_addr | |
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816 RelocIterator all_oops(nm, first_oop); |
| 0 | 817 RelocIterator iter = all_oops; |
| 818 iter.set_limit(first_oop+1); | |
| 819 bool found_oop = false; | |
| 820 while (iter.next()) { | |
| 821 if (iter.type() == relocInfo::oop_type) { | |
| 822 assert(iter.addr() == first_oop, "must find first_oop"); | |
| 823 oop_addr = iter.oop_reloc()->oop_addr(); | |
| 824 found_oop = true; | |
| 825 break; | |
| 826 } | |
| 827 } | |
| 828 assert(found_oop, "must find first_oop"); | |
| 829 | |
| 830 bool did_reset = false; | |
| 831 while (ic_call == NULL) { | |
| 832 // search forward for the ic_call matching the given first_oop | |
| 833 while (iter.next()) { | |
| 834 if (iter.type() == relocInfo::virtual_call_type) { | |
| 835 virtual_call_Relocation* r = iter.virtual_call_reloc(); | |
| 836 if (r->first_oop() == first_oop) { | |
| 837 ic_call = r->addr(); | |
| 838 oop_limit = r->oop_limit(); | |
| 839 break; | |
| 840 } | |
| 841 } | |
| 842 } | |
| 843 guarantee(!did_reset, "cannot find ic_call"); | |
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844 iter = RelocIterator(nm); // search the whole nmethod |
| 0 | 845 did_reset = true; |
| 846 } | |
| 847 | |
| 848 assert(oop_limit != NULL && first_oop != NULL && ic_call != NULL, ""); | |
| 849 all_oops.set_limit(oop_limit); | |
| 850 return all_oops; | |
| 851 } | |
| 852 | |
| 853 | |
| 854 address virtual_call_Relocation::first_oop() { | |
| 855 assert(_first_oop != NULL && _first_oop < addr(), "must precede ic_call"); | |
| 856 return _first_oop; | |
| 857 } | |
| 858 | |
| 859 | |
| 860 address virtual_call_Relocation::oop_limit() { | |
| 861 if (_oop_limit == NULL) | |
| 862 return addr() + NativeCall::instruction_size; | |
| 863 else | |
| 864 return _oop_limit; | |
| 865 } | |
| 866 | |
| 867 | |
| 868 | |
| 869 void virtual_call_Relocation::clear_inline_cache() { | |
| 870 // No stubs for ICs | |
| 871 // Clean IC | |
| 872 ResourceMark rm; | |
| 873 CompiledIC* icache = CompiledIC_at(this); | |
| 874 icache->set_to_clean(); | |
| 875 } | |
| 876 | |
| 877 | |
| 878 void opt_virtual_call_Relocation::clear_inline_cache() { | |
| 879 // No stubs for ICs | |
| 880 // Clean IC | |
| 881 ResourceMark rm; | |
| 882 CompiledIC* icache = CompiledIC_at(this); | |
| 883 icache->set_to_clean(); | |
| 884 } | |
| 885 | |
| 886 | |
| 887 address opt_virtual_call_Relocation::static_stub() { | |
| 888 // search for the static stub who points back to this static call | |
| 889 address static_call_addr = addr(); | |
| 890 RelocIterator iter(code()); | |
| 891 while (iter.next()) { | |
| 892 if (iter.type() == relocInfo::static_stub_type) { | |
| 893 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
| 894 return iter.addr(); | |
| 895 } | |
| 896 } | |
| 897 } | |
| 898 return NULL; | |
| 899 } | |
| 900 | |
| 901 | |
| 902 void static_call_Relocation::clear_inline_cache() { | |
| 903 // Safe call site info | |
| 904 CompiledStaticCall* handler = compiledStaticCall_at(this); | |
| 905 handler->set_to_clean(); | |
| 906 } | |
| 907 | |
| 908 | |
| 909 address static_call_Relocation::static_stub() { | |
| 910 // search for the static stub who points back to this static call | |
| 911 address static_call_addr = addr(); | |
| 912 RelocIterator iter(code()); | |
| 913 while (iter.next()) { | |
| 914 if (iter.type() == relocInfo::static_stub_type) { | |
| 915 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
| 916 return iter.addr(); | |
| 917 } | |
| 918 } | |
| 919 } | |
| 920 return NULL; | |
| 921 } | |
| 922 | |
| 923 | |
| 924 void static_stub_Relocation::clear_inline_cache() { | |
| 925 // Call stub is only used when calling the interpreted code. | |
| 926 // It does not really need to be cleared, except that we want to clean out the methodoop. | |
| 927 CompiledStaticCall::set_stub_to_clean(this); | |
| 928 } | |
| 929 | |
| 930 | |
| 931 void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 932 address target = _target; | |
| 933 if (target == NULL) { | |
| 934 // An absolute embedded reference to an external location, | |
| 935 // which means there is nothing to fix here. | |
| 936 return; | |
| 937 } | |
| 938 // Probably this reference is absolute, not relative, so the | |
| 939 // following is probably a no-op. | |
| 940 assert(src->section_index_of(target) == CodeBuffer::SECT_NONE, "sanity"); | |
| 941 set_value(target); | |
| 942 } | |
| 943 | |
| 944 | |
| 945 address external_word_Relocation::target() { | |
| 946 address target = _target; | |
| 947 if (target == NULL) { | |
| 948 target = pd_get_address_from_code(); | |
| 949 } | |
| 950 return target; | |
| 951 } | |
| 952 | |
| 953 | |
| 954 void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
| 955 address target = _target; | |
| 956 if (target == NULL) { | |
| 957 if (addr_in_const()) { | |
| 958 target = new_addr_for(*(address*)addr(), src, dest); | |
| 959 } else { | |
| 960 target = new_addr_for(pd_get_address_from_code(), src, dest); | |
| 961 } | |
| 962 } | |
| 963 set_value(target); | |
| 964 } | |
| 965 | |
| 966 | |
| 967 address internal_word_Relocation::target() { | |
| 968 address target = _target; | |
| 969 if (target == NULL) { | |
| 970 target = pd_get_address_from_code(); | |
| 971 } | |
| 972 return target; | |
| 973 } | |
| 974 | |
| 975 | |
| 976 breakpoint_Relocation::breakpoint_Relocation(int kind, address target, bool internal) { | |
| 977 bool active = false; | |
| 978 bool enabled = (kind == initialization); | |
| 979 bool removable = (kind != safepoint); | |
| 980 bool settable = (target == NULL); | |
| 981 | |
| 982 int bits = kind; | |
| 983 if (enabled) bits |= enabled_state; | |
| 984 if (internal) bits |= internal_attr; | |
| 985 if (removable) bits |= removable_attr; | |
| 986 if (settable) bits |= settable_attr; | |
| 987 | |
| 988 _bits = bits | high_bit; | |
| 989 _target = target; | |
| 990 | |
| 991 assert(this->kind() == kind, "kind encoded"); | |
| 992 assert(this->enabled() == enabled, "enabled encoded"); | |
| 993 assert(this->active() == active, "active encoded"); | |
| 994 assert(this->internal() == internal, "internal encoded"); | |
| 995 assert(this->removable() == removable, "removable encoded"); | |
| 996 assert(this->settable() == settable, "settable encoded"); | |
| 997 } | |
| 998 | |
| 999 | |
| 1000 address breakpoint_Relocation::target() const { | |
| 1001 return _target; | |
| 1002 } | |
| 1003 | |
| 1004 | |
| 1005 void breakpoint_Relocation::set_target(address x) { | |
| 1006 assert(settable(), "must be settable"); | |
| 1007 jint target_bits = | |
| 1008 (jint)(internal() ? scaled_offset (x, addr()) | |
| 1009 : runtime_address_to_index(x)); | |
| 1010 short* p = &live_bits() + 1; | |
| 1011 p = add_jint(p, target_bits); | |
| 1012 assert(p == instrs(), "new target must fit"); | |
| 1013 _target = x; | |
| 1014 } | |
| 1015 | |
| 1016 | |
| 1017 void breakpoint_Relocation::set_enabled(bool b) { | |
| 1018 if (enabled() == b) return; | |
| 1019 | |
| 1020 if (b) { | |
| 1021 set_bits(bits() | enabled_state); | |
| 1022 } else { | |
| 1023 set_active(false); // remove the actual breakpoint insn, if any | |
| 1024 set_bits(bits() & ~enabled_state); | |
| 1025 } | |
| 1026 } | |
| 1027 | |
| 1028 | |
| 1029 void breakpoint_Relocation::set_active(bool b) { | |
| 1030 assert(!b || enabled(), "cannot activate a disabled breakpoint"); | |
| 1031 | |
| 1032 if (active() == b) return; | |
| 1033 | |
| 1034 // %%% should probably seize a lock here (might not be the right lock) | |
| 1035 //MutexLockerEx ml_patch(Patching_lock, true); | |
| 1036 //if (active() == b) return; // recheck state after locking | |
| 1037 | |
| 1038 if (b) { | |
| 1039 set_bits(bits() | active_state); | |
| 1040 if (instrlen() == 0) | |
| 1041 fatal("breakpoints in original code must be undoable"); | |
| 1042 pd_swap_in_breakpoint (addr(), instrs(), instrlen()); | |
| 1043 } else { | |
| 1044 set_bits(bits() & ~active_state); | |
| 1045 pd_swap_out_breakpoint(addr(), instrs(), instrlen()); | |
| 1046 } | |
| 1047 } | |
| 1048 | |
| 1049 | |
| 1050 //--------------------------------------------------------------------------------- | |
| 1051 // Non-product code | |
| 1052 | |
| 1053 #ifndef PRODUCT | |
| 1054 | |
| 1055 static const char* reloc_type_string(relocInfo::relocType t) { | |
| 1056 switch (t) { | |
| 1057 #define EACH_CASE(name) \ | |
| 1058 case relocInfo::name##_type: \ | |
| 1059 return #name; | |
| 1060 | |
| 1061 APPLY_TO_RELOCATIONS(EACH_CASE); | |
| 1062 #undef EACH_CASE | |
| 1063 | |
| 1064 case relocInfo::none: | |
| 1065 return "none"; | |
| 1066 case relocInfo::data_prefix_tag: | |
| 1067 return "prefix"; | |
| 1068 default: | |
| 1069 return "UNKNOWN RELOC TYPE"; | |
| 1070 } | |
| 1071 } | |
| 1072 | |
| 1073 | |
| 1074 void RelocIterator::print_current() { | |
| 1075 if (!has_current()) { | |
| 1076 tty->print_cr("(no relocs)"); | |
| 1077 return; | |
| 1078 } | |
| 1079 tty->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT, | |
| 1080 _current, type(), reloc_type_string((relocInfo::relocType) type()), _addr); | |
| 1081 if (current()->format() != 0) | |
| 1082 tty->print(" format=%d", current()->format()); | |
| 1083 if (datalen() == 1) { | |
| 1084 tty->print(" data=%d", data()[0]); | |
| 1085 } else if (datalen() > 0) { | |
| 1086 tty->print(" data={"); | |
| 1087 for (int i = 0; i < datalen(); i++) { | |
| 1088 tty->print("%04x", data()[i] & 0xFFFF); | |
| 1089 } | |
| 1090 tty->print("}"); | |
| 1091 } | |
| 1092 tty->print("]"); | |
| 1093 switch (type()) { | |
| 1094 case relocInfo::oop_type: | |
| 1095 { | |
| 1096 oop_Relocation* r = oop_reloc(); | |
| 1097 oop* oop_addr = NULL; | |
| 1098 oop raw_oop = NULL; | |
| 1099 oop oop_value = NULL; | |
| 1100 if (code() != NULL || r->oop_is_immediate()) { | |
| 1101 oop_addr = r->oop_addr(); | |
| 1102 raw_oop = *oop_addr; | |
| 1103 oop_value = r->oop_value(); | |
| 1104 } | |
| 1105 tty->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", | |
| 1106 oop_addr, (address)raw_oop, r->offset()); | |
| 1107 // Do not print the oop by default--we want this routine to | |
| 1108 // work even during GC or other inconvenient times. | |
| 1109 if (WizardMode && oop_value != NULL) { | |
| 1110 tty->print("oop_value=" INTPTR_FORMAT ": ", (address)oop_value); | |
| 1111 oop_value->print_value_on(tty); | |
| 1112 } | |
| 1113 break; | |
| 1114 } | |
| 1115 case relocInfo::external_word_type: | |
| 1116 case relocInfo::internal_word_type: | |
| 1117 case relocInfo::section_word_type: | |
| 1118 { | |
| 1119 DataRelocation* r = (DataRelocation*) reloc(); | |
| 1120 tty->print(" | [target=" INTPTR_FORMAT "]", r->value()); //value==target | |
| 1121 break; | |
| 1122 } | |
| 1123 case relocInfo::static_call_type: | |
| 1124 case relocInfo::runtime_call_type: | |
| 1125 { | |
| 1126 CallRelocation* r = (CallRelocation*) reloc(); | |
| 1127 tty->print(" | [destination=" INTPTR_FORMAT "]", r->destination()); | |
| 1128 break; | |
| 1129 } | |
| 1130 case relocInfo::virtual_call_type: | |
| 1131 { | |
| 1132 virtual_call_Relocation* r = (virtual_call_Relocation*) reloc(); | |
| 1133 tty->print(" | [destination=" INTPTR_FORMAT " first_oop=" INTPTR_FORMAT " oop_limit=" INTPTR_FORMAT "]", | |
| 1134 r->destination(), r->first_oop(), r->oop_limit()); | |
| 1135 break; | |
| 1136 } | |
| 1137 case relocInfo::static_stub_type: | |
| 1138 { | |
| 1139 static_stub_Relocation* r = (static_stub_Relocation*) reloc(); | |
| 1140 tty->print(" | [static_call=" INTPTR_FORMAT "]", r->static_call()); | |
| 1141 break; | |
| 1142 } | |
| 1143 } | |
| 1144 tty->cr(); | |
| 1145 } | |
| 1146 | |
| 1147 | |
| 1148 void RelocIterator::print() { | |
| 1149 RelocIterator save_this = (*this); | |
| 1150 relocInfo* scan = _current; | |
| 1151 if (!has_current()) scan += 1; // nothing to scan here! | |
| 1152 | |
| 1153 bool skip_next = has_current(); | |
| 1154 bool got_next; | |
| 1155 while (true) { | |
| 1156 got_next = (skip_next || next()); | |
| 1157 skip_next = false; | |
| 1158 | |
| 1159 tty->print(" @" INTPTR_FORMAT ": ", scan); | |
| 1160 relocInfo* newscan = _current+1; | |
| 1161 if (!has_current()) newscan -= 1; // nothing to scan here! | |
| 1162 while (scan < newscan) { | |
| 1163 tty->print("%04x", *(short*)scan & 0xFFFF); | |
| 1164 scan++; | |
| 1165 } | |
| 1166 tty->cr(); | |
| 1167 | |
| 1168 if (!got_next) break; | |
| 1169 print_current(); | |
| 1170 } | |
| 1171 | |
| 1172 (*this) = save_this; | |
| 1173 } | |
| 1174 | |
| 1175 // For the debugger: | |
| 1176 extern "C" | |
|
1563
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1177 void print_blob_locs(nmethod* nm) { |
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1178 nm->print(); |
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1179 RelocIterator iter(nm); |
| 0 | 1180 iter.print(); |
| 1181 } | |
| 1182 extern "C" | |
| 1183 void print_buf_locs(CodeBuffer* cb) { | |
| 1184 FlagSetting fs(PrintRelocations, true); | |
| 1185 cb->print(); | |
| 1186 } | |
| 1187 #endif // !PRODUCT |