Mercurial > hg > graal-compiler
annotate src/share/vm/code/relocInfo.cpp @ 11813:9af8b109ec0f
Truffle: force slow path on StringBuilder methods.
author | Andreas Woess <andreas.woess@jku.at> |
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date | Thu, 26 Sep 2013 16:44:54 +0200 |
parents | 7875ea94bea5 |
children | 8085ce95b6f5 de6a9e811145 53fa76359eb1 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "code/codeCache.hpp" |
1972 | 27 #include "code/compiledIC.hpp" |
28 #include "code/nmethod.hpp" | |
29 #include "code/relocInfo.hpp" | |
30 #include "memory/resourceArea.hpp" | |
31 #include "runtime/stubCodeGenerator.hpp" | |
32 #include "utilities/copy.hpp" | |
0 | 33 |
34 | |
35 const RelocationHolder RelocationHolder::none; // its type is relocInfo::none | |
36 | |
37 | |
38 // Implementation of relocInfo | |
39 | |
40 #ifdef ASSERT | |
41 relocInfo::relocInfo(relocType t, int off, int f) { | |
42 assert(t != data_prefix_tag, "cannot build a prefix this way"); | |
43 assert((t & type_mask) == t, "wrong type"); | |
44 assert((f & format_mask) == f, "wrong format"); | |
45 assert(off >= 0 && off < offset_limit(), "offset out off bounds"); | |
46 assert((off & (offset_unit-1)) == 0, "misaligned offset"); | |
47 (*this) = relocInfo(t, RAW_BITS, off, f); | |
48 } | |
49 #endif | |
50 | |
51 void relocInfo::initialize(CodeSection* dest, Relocation* reloc) { | |
52 relocInfo* data = this+1; // here's where the data might go | |
53 dest->set_locs_end(data); // sync end: the next call may read dest.locs_end | |
54 reloc->pack_data_to(dest); // maybe write data into locs, advancing locs_end | |
55 relocInfo* data_limit = dest->locs_end(); | |
56 if (data_limit > data) { | |
57 relocInfo suffix = (*this); | |
58 data_limit = this->finish_prefix((short*) data_limit); | |
59 // Finish up with the suffix. (Hack note: pack_data_to might edit this.) | |
60 *data_limit = suffix; | |
61 dest->set_locs_end(data_limit+1); | |
62 } | |
63 } | |
64 | |
65 relocInfo* relocInfo::finish_prefix(short* prefix_limit) { | |
66 assert(sizeof(relocInfo) == sizeof(short), "change this code"); | |
67 short* p = (short*)(this+1); | |
68 assert(prefix_limit >= p, "must be a valid span of data"); | |
69 int plen = prefix_limit - p; | |
70 if (plen == 0) { | |
71 debug_only(_value = 0xFFFF); | |
72 return this; // no data: remove self completely | |
73 } | |
74 if (plen == 1 && fits_into_immediate(p[0])) { | |
75 (*this) = immediate_relocInfo(p[0]); // move data inside self | |
76 return this+1; | |
77 } | |
78 // cannot compact, so just update the count and return the limit pointer | |
79 (*this) = prefix_relocInfo(plen); // write new datalen | |
80 assert(data() + datalen() == prefix_limit, "pointers must line up"); | |
81 return (relocInfo*)prefix_limit; | |
82 } | |
83 | |
84 | |
85 void relocInfo::set_type(relocType t) { | |
86 int old_offset = addr_offset(); | |
87 int old_format = format(); | |
88 (*this) = relocInfo(t, old_offset, old_format); | |
89 assert(type()==(int)t, "sanity check"); | |
90 assert(addr_offset()==old_offset, "sanity check"); | |
91 assert(format()==old_format, "sanity check"); | |
92 } | |
93 | |
94 | |
95 void relocInfo::set_format(int f) { | |
96 int old_offset = addr_offset(); | |
97 assert((f & format_mask) == f, "wrong format"); | |
98 _value = (_value & ~(format_mask << offset_width)) | (f << offset_width); | |
99 assert(addr_offset()==old_offset, "sanity check"); | |
100 } | |
101 | |
102 | |
103 void relocInfo::change_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type, relocType new_type) { | |
104 bool found = false; | |
105 while (itr->next() && !found) { | |
106 if (itr->addr() == pc) { | |
107 assert(itr->type()==old_type, "wrong relocInfo type found"); | |
108 itr->current()->set_type(new_type); | |
109 found=true; | |
110 } | |
111 } | |
112 assert(found, "no relocInfo found for pc"); | |
113 } | |
114 | |
115 | |
116 void relocInfo::remove_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type) { | |
117 change_reloc_info_for_address(itr, pc, old_type, none); | |
118 } | |
119 | |
120 | |
121 // ---------------------------------------------------------------------------------------------------- | |
122 // Implementation of RelocIterator | |
123 | |
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124 void RelocIterator::initialize(nmethod* nm, address begin, address limit) { |
0 | 125 initialize_misc(); |
126 | |
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127 if (nm == NULL && begin != NULL) { |
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128 // allow nmethod to be deduced from beginning address |
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129 CodeBlob* cb = CodeCache::find_blob(begin); |
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130 nm = cb->as_nmethod_or_null(); |
0 | 131 } |
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132 assert(nm != NULL, "must be able to deduce nmethod from other arguments"); |
0 | 133 |
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134 _code = nm; |
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135 _current = nm->relocation_begin() - 1; |
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136 _end = nm->relocation_end(); |
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137 _addr = nm->content_begin(); |
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138 |
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139 // Initialize code sections. |
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140 _section_start[CodeBuffer::SECT_CONSTS] = nm->consts_begin(); |
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141 _section_start[CodeBuffer::SECT_INSTS ] = nm->insts_begin() ; |
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142 _section_start[CodeBuffer::SECT_STUBS ] = nm->stub_begin() ; |
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143 |
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144 _section_end [CodeBuffer::SECT_CONSTS] = nm->consts_end() ; |
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145 _section_end [CodeBuffer::SECT_INSTS ] = nm->insts_end() ; |
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146 _section_end [CodeBuffer::SECT_STUBS ] = nm->stub_end() ; |
0 | 147 |
148 assert(!has_current(), "just checking"); | |
1748 | 149 assert(begin == NULL || begin >= nm->code_begin(), "in bounds"); |
150 assert(limit == NULL || limit <= nm->code_end(), "in bounds"); | |
0 | 151 set_limits(begin, limit); |
152 } | |
153 | |
154 | |
155 RelocIterator::RelocIterator(CodeSection* cs, address begin, address limit) { | |
156 initialize_misc(); | |
157 | |
158 _current = cs->locs_start()-1; | |
159 _end = cs->locs_end(); | |
160 _addr = cs->start(); | |
161 _code = NULL; // Not cb->blob(); | |
162 | |
163 CodeBuffer* cb = cs->outer(); | |
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164 assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal"); |
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165 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) { |
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166 CodeSection* cs = cb->code_section(n); |
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167 _section_start[n] = cs->start(); |
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168 _section_end [n] = cs->end(); |
0 | 169 } |
170 | |
171 assert(!has_current(), "just checking"); | |
172 | |
173 assert(begin == NULL || begin >= cs->start(), "in bounds"); | |
174 assert(limit == NULL || limit <= cs->end(), "in bounds"); | |
175 set_limits(begin, limit); | |
176 } | |
177 | |
178 | |
179 enum { indexCardSize = 128 }; | |
180 struct RelocIndexEntry { | |
181 jint addr_offset; // offset from header_end of an addr() | |
182 jint reloc_offset; // offset from header_end of a relocInfo (prefix) | |
183 }; | |
184 | |
185 | |
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186 bool RelocIterator::addr_in_const() const { |
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187 const int n = CodeBuffer::SECT_CONSTS; |
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188 return section_start(n) <= addr() && addr() < section_end(n); |
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189 } |
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190 |
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191 |
0 | 192 static inline int num_cards(int code_size) { |
193 return (code_size-1) / indexCardSize; | |
194 } | |
195 | |
196 | |
197 int RelocIterator::locs_and_index_size(int code_size, int locs_size) { | |
198 if (!UseRelocIndex) return locs_size; // no index | |
199 code_size = round_to(code_size, oopSize); | |
200 locs_size = round_to(locs_size, oopSize); | |
201 int index_size = num_cards(code_size) * sizeof(RelocIndexEntry); | |
202 // format of indexed relocs: | |
203 // relocation_begin: relocInfo ... | |
204 // index: (addr,reloc#) ... | |
205 // indexSize :relocation_end | |
206 return locs_size + index_size + BytesPerInt; | |
207 } | |
208 | |
209 | |
210 void RelocIterator::create_index(relocInfo* dest_begin, int dest_count, relocInfo* dest_end) { | |
211 address relocation_begin = (address)dest_begin; | |
212 address relocation_end = (address)dest_end; | |
213 int total_size = relocation_end - relocation_begin; | |
214 int locs_size = dest_count * sizeof(relocInfo); | |
215 if (!UseRelocIndex) { | |
216 Copy::fill_to_bytes(relocation_begin + locs_size, total_size-locs_size, 0); | |
217 return; | |
218 } | |
219 int index_size = total_size - locs_size - BytesPerInt; // find out how much space is left | |
220 int ncards = index_size / sizeof(RelocIndexEntry); | |
221 assert(total_size == locs_size + index_size + BytesPerInt, "checkin'"); | |
222 assert(index_size >= 0 && index_size % sizeof(RelocIndexEntry) == 0, "checkin'"); | |
223 jint* index_size_addr = (jint*)relocation_end - 1; | |
224 | |
225 assert(sizeof(jint) == BytesPerInt, "change this code"); | |
226 | |
227 *index_size_addr = index_size; | |
228 if (index_size != 0) { | |
229 assert(index_size > 0, "checkin'"); | |
230 | |
231 RelocIndexEntry* index = (RelocIndexEntry *)(relocation_begin + locs_size); | |
232 assert(index == (RelocIndexEntry*)index_size_addr - ncards, "checkin'"); | |
233 | |
234 // walk over the relocations, and fill in index entries as we go | |
235 RelocIterator iter; | |
236 const address initial_addr = NULL; | |
237 relocInfo* const initial_current = dest_begin - 1; // biased by -1 like elsewhere | |
238 | |
239 iter._code = NULL; | |
240 iter._addr = initial_addr; | |
241 iter._limit = (address)(intptr_t)(ncards * indexCardSize); | |
242 iter._current = initial_current; | |
243 iter._end = dest_begin + dest_count; | |
244 | |
245 int i = 0; | |
246 address next_card_addr = (address)indexCardSize; | |
247 int addr_offset = 0; | |
248 int reloc_offset = 0; | |
249 while (true) { | |
250 // Checkpoint the iterator before advancing it. | |
251 addr_offset = iter._addr - initial_addr; | |
252 reloc_offset = iter._current - initial_current; | |
253 if (!iter.next()) break; | |
254 while (iter.addr() >= next_card_addr) { | |
255 index[i].addr_offset = addr_offset; | |
256 index[i].reloc_offset = reloc_offset; | |
257 i++; | |
258 next_card_addr += indexCardSize; | |
259 } | |
260 } | |
261 while (i < ncards) { | |
262 index[i].addr_offset = addr_offset; | |
263 index[i].reloc_offset = reloc_offset; | |
264 i++; | |
265 } | |
266 } | |
267 } | |
268 | |
269 | |
270 void RelocIterator::set_limits(address begin, address limit) { | |
271 int index_size = 0; | |
272 if (UseRelocIndex && _code != NULL) { | |
273 index_size = ((jint*)_end)[-1]; | |
274 _end = (relocInfo*)( (address)_end - index_size - BytesPerInt ); | |
275 } | |
276 | |
277 _limit = limit; | |
278 | |
279 // the limit affects this next stuff: | |
280 if (begin != NULL) { | |
281 #ifdef ASSERT | |
282 // In ASSERT mode we do not actually use the index, but simply | |
283 // check that its contents would have led us to the right answer. | |
284 address addrCheck = _addr; | |
285 relocInfo* infoCheck = _current; | |
286 #endif // ASSERT | |
287 if (index_size > 0) { | |
288 // skip ahead | |
289 RelocIndexEntry* index = (RelocIndexEntry*)_end; | |
290 RelocIndexEntry* index_limit = (RelocIndexEntry*)((address)index + index_size); | |
1748 | 291 assert(_addr == _code->code_begin(), "_addr must be unadjusted"); |
0 | 292 int card = (begin - _addr) / indexCardSize; |
293 if (card > 0) { | |
294 if (index+card-1 < index_limit) index += card-1; | |
295 else index = index_limit - 1; | |
296 #ifdef ASSERT | |
297 addrCheck = _addr + index->addr_offset; | |
298 infoCheck = _current + index->reloc_offset; | |
299 #else | |
300 // Advance the iterator immediately to the last valid state | |
301 // for the previous card. Calling "next" will then advance | |
302 // it to the first item on the required card. | |
303 _addr += index->addr_offset; | |
304 _current += index->reloc_offset; | |
305 #endif // ASSERT | |
306 } | |
307 } | |
308 | |
309 relocInfo* backup; | |
310 address backup_addr; | |
311 while (true) { | |
312 backup = _current; | |
313 backup_addr = _addr; | |
314 #ifdef ASSERT | |
315 if (backup == infoCheck) { | |
316 assert(backup_addr == addrCheck, "must match"); addrCheck = NULL; infoCheck = NULL; | |
317 } else { | |
318 assert(addrCheck == NULL || backup_addr <= addrCheck, "must not pass addrCheck"); | |
319 } | |
320 #endif // ASSERT | |
321 if (!next() || addr() >= begin) break; | |
322 } | |
323 assert(addrCheck == NULL || addrCheck == backup_addr, "must have matched addrCheck"); | |
324 assert(infoCheck == NULL || infoCheck == backup, "must have matched infoCheck"); | |
325 // At this point, either we are at the first matching record, | |
326 // or else there is no such record, and !has_current(). | |
327 // In either case, revert to the immediatly preceding state. | |
328 _current = backup; | |
329 _addr = backup_addr; | |
330 set_has_current(false); | |
331 } | |
332 } | |
333 | |
334 | |
335 void RelocIterator::set_limit(address limit) { | |
336 address code_end = (address)code() + code()->size(); | |
337 assert(limit == NULL || limit <= code_end, "in bounds"); | |
338 _limit = limit; | |
339 } | |
340 | |
341 // All the strange bit-encodings are in here. | |
342 // The idea is to encode relocation data which are small integers | |
343 // very efficiently (a single extra halfword). Larger chunks of | |
344 // relocation data need a halfword header to hold their size. | |
345 void RelocIterator::advance_over_prefix() { | |
346 if (_current->is_datalen()) { | |
347 _data = (short*) _current->data(); | |
348 _datalen = _current->datalen(); | |
349 _current += _datalen + 1; // skip the embedded data & header | |
350 } else { | |
351 _databuf = _current->immediate(); | |
352 _data = &_databuf; | |
353 _datalen = 1; | |
354 _current++; // skip the header | |
355 } | |
356 // The client will see the following relocInfo, whatever that is. | |
357 // It is the reloc to which the preceding data applies. | |
358 } | |
359 | |
360 | |
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361 void RelocIterator::initialize_misc() { |
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362 set_has_current(false); |
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363 for (int i = (int) CodeBuffer::SECT_FIRST; i < (int) CodeBuffer::SECT_LIMIT; i++) { |
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364 _section_start[i] = NULL; // these will be lazily computed, if needed |
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365 _section_end [i] = NULL; |
0 | 366 } |
367 } | |
368 | |
369 | |
370 Relocation* RelocIterator::reloc() { | |
371 // (take the "switch" out-of-line) | |
372 relocInfo::relocType t = type(); | |
373 if (false) {} | |
374 #define EACH_TYPE(name) \ | |
375 else if (t == relocInfo::name##_type) { \ | |
376 return name##_reloc(); \ | |
377 } | |
378 APPLY_TO_RELOCATIONS(EACH_TYPE); | |
379 #undef EACH_TYPE | |
380 assert(t == relocInfo::none, "must be padding"); | |
381 return new(_rh) Relocation(); | |
382 } | |
383 | |
384 | |
385 //////// Methods for flyweight Relocation types | |
386 | |
387 | |
388 RelocationHolder RelocationHolder::plus(int offset) const { | |
389 if (offset != 0) { | |
390 switch (type()) { | |
391 case relocInfo::none: | |
392 break; | |
393 case relocInfo::oop_type: | |
394 { | |
395 oop_Relocation* r = (oop_Relocation*)reloc(); | |
396 return oop_Relocation::spec(r->oop_index(), r->offset() + offset); | |
397 } | |
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398 case relocInfo::metadata_type: |
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399 { |
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400 metadata_Relocation* r = (metadata_Relocation*)reloc(); |
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401 return metadata_Relocation::spec(r->metadata_index(), r->offset() + offset); |
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402 } |
0 | 403 default: |
404 ShouldNotReachHere(); | |
405 } | |
406 } | |
407 return (*this); | |
408 } | |
409 | |
410 | |
411 void Relocation::guarantee_size() { | |
412 guarantee(false, "Make _relocbuf bigger!"); | |
413 } | |
414 | |
415 // some relocations can compute their own values | |
416 address Relocation::value() { | |
417 ShouldNotReachHere(); | |
418 return NULL; | |
419 } | |
420 | |
421 | |
422 void Relocation::set_value(address x) { | |
423 ShouldNotReachHere(); | |
424 } | |
425 | |
426 | |
427 RelocationHolder Relocation::spec_simple(relocInfo::relocType rtype) { | |
428 if (rtype == relocInfo::none) return RelocationHolder::none; | |
429 relocInfo ri = relocInfo(rtype, 0); | |
430 RelocIterator itr; | |
431 itr.set_current(ri); | |
432 itr.reloc(); | |
433 return itr._rh; | |
434 } | |
435 | |
436 int32_t Relocation::runtime_address_to_index(address runtime_address) { | |
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437 assert(!is_reloc_index((intptr_t)runtime_address), "must not look like an index"); |
0 | 438 |
439 if (runtime_address == NULL) return 0; | |
440 | |
441 StubCodeDesc* p = StubCodeDesc::desc_for(runtime_address); | |
442 if (p != NULL && p->begin() == runtime_address) { | |
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443 assert(is_reloc_index(p->index()), "there must not be too many stubs"); |
0 | 444 return (int32_t)p->index(); |
445 } else { | |
446 // Known "miscellaneous" non-stub pointers: | |
447 // os::get_polling_page(), SafepointSynchronize::address_of_state() | |
448 if (PrintRelocations) { | |
449 tty->print_cr("random unregistered address in relocInfo: " INTPTR_FORMAT, runtime_address); | |
450 } | |
451 #ifndef _LP64 | |
452 return (int32_t) (intptr_t)runtime_address; | |
453 #else | |
454 // didn't fit return non-index | |
455 return -1; | |
456 #endif /* _LP64 */ | |
457 } | |
458 } | |
459 | |
460 | |
461 address Relocation::index_to_runtime_address(int32_t index) { | |
462 if (index == 0) return NULL; | |
463 | |
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464 if (is_reloc_index(index)) { |
0 | 465 StubCodeDesc* p = StubCodeDesc::desc_for_index(index); |
466 assert(p != NULL, "there must be a stub for this index"); | |
467 return p->begin(); | |
468 } else { | |
469 #ifndef _LP64 | |
470 // this only works on 32bit machines | |
471 return (address) ((intptr_t) index); | |
472 #else | |
473 fatal("Relocation::index_to_runtime_address, int32_t not pointer sized"); | |
474 return NULL; | |
475 #endif /* _LP64 */ | |
476 } | |
477 } | |
478 | |
479 address Relocation::old_addr_for(address newa, | |
480 const CodeBuffer* src, CodeBuffer* dest) { | |
481 int sect = dest->section_index_of(newa); | |
482 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
483 address ostart = src->code_section(sect)->start(); | |
484 address nstart = dest->code_section(sect)->start(); | |
485 return ostart + (newa - nstart); | |
486 } | |
487 | |
488 address Relocation::new_addr_for(address olda, | |
489 const CodeBuffer* src, CodeBuffer* dest) { | |
490 debug_only(const CodeBuffer* src0 = src); | |
491 int sect = CodeBuffer::SECT_NONE; | |
492 // Look for olda in the source buffer, and all previous incarnations | |
493 // if the source buffer has been expanded. | |
494 for (; src != NULL; src = src->before_expand()) { | |
495 sect = src->section_index_of(olda); | |
496 if (sect != CodeBuffer::SECT_NONE) break; | |
497 } | |
498 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
499 address ostart = src->code_section(sect)->start(); | |
500 address nstart = dest->code_section(sect)->start(); | |
501 return nstart + (olda - ostart); | |
502 } | |
503 | |
504 void Relocation::normalize_address(address& addr, const CodeSection* dest, bool allow_other_sections) { | |
505 address addr0 = addr; | |
506 if (addr0 == NULL || dest->allocates2(addr0)) return; | |
507 CodeBuffer* cb = dest->outer(); | |
508 addr = new_addr_for(addr0, cb, cb); | |
509 assert(allow_other_sections || dest->contains2(addr), | |
510 "addr must be in required section"); | |
511 } | |
512 | |
513 | |
514 void CallRelocation::set_destination(address x) { | |
515 pd_set_call_destination(x); | |
516 } | |
517 | |
518 void CallRelocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
519 // Usually a self-relative reference to an external routine. | |
520 // On some platforms, the reference is absolute (not self-relative). | |
521 // The enhanced use of pd_call_destination sorts this all out. | |
522 address orig_addr = old_addr_for(addr(), src, dest); | |
523 address callee = pd_call_destination(orig_addr); | |
524 // Reassert the callee address, this time in the new copy of the code. | |
525 pd_set_call_destination(callee); | |
526 } | |
527 | |
528 | |
529 //// pack/unpack methods | |
530 | |
531 void oop_Relocation::pack_data_to(CodeSection* dest) { | |
532 short* p = (short*) dest->locs_end(); | |
533 p = pack_2_ints_to(p, _oop_index, _offset); | |
534 dest->set_locs_end((relocInfo*) p); | |
535 } | |
536 | |
537 | |
538 void oop_Relocation::unpack_data() { | |
539 unpack_2_ints(_oop_index, _offset); | |
540 } | |
541 | |
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542 void metadata_Relocation::pack_data_to(CodeSection* dest) { |
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543 short* p = (short*) dest->locs_end(); |
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544 p = pack_2_ints_to(p, _metadata_index, _offset); |
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545 dest->set_locs_end((relocInfo*) p); |
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546 } |
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547 |
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548 |
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549 void metadata_Relocation::unpack_data() { |
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550 unpack_2_ints(_metadata_index, _offset); |
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551 } |
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552 |
0 | 553 |
554 void virtual_call_Relocation::pack_data_to(CodeSection* dest) { | |
555 short* p = (short*) dest->locs_end(); | |
556 address point = dest->locs_point(); | |
557 | |
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558 normalize_address(_cached_value, dest); |
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559 jint x0 = scaled_offset_null_special(_cached_value, point); |
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560 p = pack_1_int_to(p, x0); |
0 | 561 dest->set_locs_end((relocInfo*) p); |
562 } | |
563 | |
564 | |
565 void virtual_call_Relocation::unpack_data() { | |
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566 jint x0 = unpack_1_int(); |
0 | 567 address point = addr(); |
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568 _cached_value = x0==0? NULL: address_from_scaled_offset(x0, point); |
0 | 569 } |
570 | |
571 | |
572 void static_stub_Relocation::pack_data_to(CodeSection* dest) { | |
573 short* p = (short*) dest->locs_end(); | |
574 CodeSection* insts = dest->outer()->insts(); | |
575 normalize_address(_static_call, insts); | |
576 p = pack_1_int_to(p, scaled_offset(_static_call, insts->start())); | |
577 dest->set_locs_end((relocInfo*) p); | |
578 } | |
579 | |
580 void static_stub_Relocation::unpack_data() { | |
581 address base = binding()->section_start(CodeBuffer::SECT_INSTS); | |
582 _static_call = address_from_scaled_offset(unpack_1_int(), base); | |
583 } | |
584 | |
585 | |
586 void external_word_Relocation::pack_data_to(CodeSection* dest) { | |
587 short* p = (short*) dest->locs_end(); | |
588 int32_t index = runtime_address_to_index(_target); | |
589 #ifndef _LP64 | |
590 p = pack_1_int_to(p, index); | |
591 #else | |
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592 if (is_reloc_index(index)) { |
0 | 593 p = pack_2_ints_to(p, index, 0); |
594 } else { | |
595 jlong t = (jlong) _target; | |
596 int32_t lo = low(t); | |
597 int32_t hi = high(t); | |
598 p = pack_2_ints_to(p, lo, hi); | |
599 DEBUG_ONLY(jlong t1 = jlong_from(hi, lo)); | |
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600 assert(!is_reloc_index(t1) && (address) t1 == _target, "not symmetric"); |
0 | 601 } |
602 #endif /* _LP64 */ | |
603 dest->set_locs_end((relocInfo*) p); | |
604 } | |
605 | |
606 | |
607 void external_word_Relocation::unpack_data() { | |
608 #ifndef _LP64 | |
609 _target = index_to_runtime_address(unpack_1_int()); | |
610 #else | |
611 int32_t lo, hi; | |
612 unpack_2_ints(lo, hi); | |
613 jlong t = jlong_from(hi, lo);; | |
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614 if (is_reloc_index(t)) { |
0 | 615 _target = index_to_runtime_address(t); |
616 } else { | |
617 _target = (address) t; | |
618 } | |
619 #endif /* _LP64 */ | |
620 } | |
621 | |
622 | |
623 void internal_word_Relocation::pack_data_to(CodeSection* dest) { | |
624 short* p = (short*) dest->locs_end(); | |
625 normalize_address(_target, dest, true); | |
626 | |
627 // Check whether my target address is valid within this section. | |
628 // If not, strengthen the relocation type to point to another section. | |
629 int sindex = _section; | |
630 if (sindex == CodeBuffer::SECT_NONE && _target != NULL | |
631 && (!dest->allocates(_target) || _target == dest->locs_point())) { | |
632 sindex = dest->outer()->section_index_of(_target); | |
633 guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere"); | |
634 relocInfo* base = dest->locs_end() - 1; | |
635 assert(base->type() == this->type(), "sanity"); | |
636 // Change the written type, to be section_word_type instead. | |
637 base->set_type(relocInfo::section_word_type); | |
638 } | |
639 | |
640 // Note: An internal_word relocation cannot refer to its own instruction, | |
641 // because we reserve "0" to mean that the pointer itself is embedded | |
642 // in the code stream. We use a section_word relocation for such cases. | |
643 | |
644 if (sindex == CodeBuffer::SECT_NONE) { | |
645 assert(type() == relocInfo::internal_word_type, "must be base class"); | |
646 guarantee(_target == NULL || dest->allocates2(_target), "must be within the given code section"); | |
647 jint x0 = scaled_offset_null_special(_target, dest->locs_point()); | |
648 assert(!(x0 == 0 && _target != NULL), "correct encoding of null target"); | |
649 p = pack_1_int_to(p, x0); | |
650 } else { | |
651 assert(_target != NULL, "sanity"); | |
652 CodeSection* sect = dest->outer()->code_section(sindex); | |
653 guarantee(sect->allocates2(_target), "must be in correct section"); | |
654 address base = sect->start(); | |
655 jint offset = scaled_offset(_target, base); | |
656 assert((uint)sindex < (uint)CodeBuffer::SECT_LIMIT, "sanity"); | |
657 assert(CodeBuffer::SECT_LIMIT <= (1 << section_width), "section_width++"); | |
658 p = pack_1_int_to(p, (offset << section_width) | sindex); | |
659 } | |
660 | |
661 dest->set_locs_end((relocInfo*) p); | |
662 } | |
663 | |
664 | |
665 void internal_word_Relocation::unpack_data() { | |
666 jint x0 = unpack_1_int(); | |
667 _target = x0==0? NULL: address_from_scaled_offset(x0, addr()); | |
668 _section = CodeBuffer::SECT_NONE; | |
669 } | |
670 | |
671 | |
672 void section_word_Relocation::unpack_data() { | |
673 jint x = unpack_1_int(); | |
674 jint offset = (x >> section_width); | |
675 int sindex = (x & ((1<<section_width)-1)); | |
676 address base = binding()->section_start(sindex); | |
677 | |
678 _section = sindex; | |
679 _target = address_from_scaled_offset(offset, base); | |
680 } | |
681 | |
682 //// miscellaneous methods | |
683 oop* oop_Relocation::oop_addr() { | |
684 int n = _oop_index; | |
685 if (n == 0) { | |
686 // oop is stored in the code stream | |
687 return (oop*) pd_address_in_code(); | |
688 } else { | |
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689 // oop is stored in table at nmethod::oops_begin |
0 | 690 return code()->oop_addr_at(n); |
691 } | |
692 } | |
693 | |
694 | |
695 oop oop_Relocation::oop_value() { | |
696 oop v = *oop_addr(); | |
697 // clean inline caches store a special pseudo-null | |
698 if (v == (oop)Universe::non_oop_word()) v = NULL; | |
699 return v; | |
700 } | |
701 | |
702 | |
703 void oop_Relocation::fix_oop_relocation() { | |
704 if (!oop_is_immediate()) { | |
705 // get the oop from the pool, and re-insert it into the instruction: | |
706 set_value(value()); | |
707 } | |
708 } | |
709 | |
710 | |
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711 void oop_Relocation::verify_oop_relocation() { |
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712 if (!oop_is_immediate()) { |
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713 // get the oop from the pool, and re-insert it into the instruction: |
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714 verify_value(value()); |
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715 } |
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716 } |
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717 |
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718 // meta data versions |
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719 Metadata** metadata_Relocation::metadata_addr() { |
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720 int n = _metadata_index; |
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721 if (n == 0) { |
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722 // metadata is stored in the code stream |
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723 return (Metadata**) pd_address_in_code(); |
0 | 724 } else { |
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725 // metadata is stored in table at nmethod::metadatas_begin |
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726 return code()->metadata_addr_at(n); |
0 | 727 } |
728 } | |
729 | |
730 | |
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731 Metadata* metadata_Relocation::metadata_value() { |
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732 Metadata* v = *metadata_addr(); |
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733 // clean inline caches store a special pseudo-null |
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734 if (v == (Metadata*)Universe::non_oop_word()) v = NULL; |
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735 return v; |
0 | 736 } |
737 | |
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738 |
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739 void metadata_Relocation::fix_metadata_relocation() { |
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740 if (!metadata_is_immediate()) { |
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741 // get the metadata from the pool, and re-insert it into the instruction: |
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742 pd_fix_value(value()); |
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743 } |
0 | 744 } |
745 | |
746 | |
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747 void metadata_Relocation::verify_metadata_relocation() { |
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748 if (!metadata_is_immediate()) { |
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749 // get the metadata from the pool, and re-insert it into the instruction: |
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750 verify_value(value()); |
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751 } |
0 | 752 } |
753 | |
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754 address virtual_call_Relocation::cached_value() { |
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755 assert(_cached_value != NULL && _cached_value < addr(), "must precede ic_call"); |
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756 return _cached_value; |
0 | 757 } |
758 | |
759 | |
760 void virtual_call_Relocation::clear_inline_cache() { | |
761 // No stubs for ICs | |
762 // Clean IC | |
763 ResourceMark rm; | |
764 CompiledIC* icache = CompiledIC_at(this); | |
765 icache->set_to_clean(); | |
766 } | |
767 | |
768 | |
769 void opt_virtual_call_Relocation::clear_inline_cache() { | |
770 // No stubs for ICs | |
771 // Clean IC | |
772 ResourceMark rm; | |
773 CompiledIC* icache = CompiledIC_at(this); | |
774 icache->set_to_clean(); | |
775 } | |
776 | |
777 | |
778 address opt_virtual_call_Relocation::static_stub() { | |
779 // search for the static stub who points back to this static call | |
780 address static_call_addr = addr(); | |
781 RelocIterator iter(code()); | |
782 while (iter.next()) { | |
783 if (iter.type() == relocInfo::static_stub_type) { | |
784 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
785 return iter.addr(); | |
786 } | |
787 } | |
788 } | |
789 return NULL; | |
790 } | |
791 | |
792 | |
793 void static_call_Relocation::clear_inline_cache() { | |
794 // Safe call site info | |
795 CompiledStaticCall* handler = compiledStaticCall_at(this); | |
796 handler->set_to_clean(); | |
797 } | |
798 | |
799 | |
800 address static_call_Relocation::static_stub() { | |
801 // search for the static stub who points back to this static call | |
802 address static_call_addr = addr(); | |
803 RelocIterator iter(code()); | |
804 while (iter.next()) { | |
805 if (iter.type() == relocInfo::static_stub_type) { | |
806 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
807 return iter.addr(); | |
808 } | |
809 } | |
810 } | |
811 return NULL; | |
812 } | |
813 | |
814 | |
815 void static_stub_Relocation::clear_inline_cache() { | |
816 // Call stub is only used when calling the interpreted code. | |
817 // It does not really need to be cleared, except that we want to clean out the methodoop. | |
818 CompiledStaticCall::set_stub_to_clean(this); | |
819 } | |
820 | |
821 | |
822 void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
823 address target = _target; | |
824 if (target == NULL) { | |
825 // An absolute embedded reference to an external location, | |
826 // which means there is nothing to fix here. | |
827 return; | |
828 } | |
829 // Probably this reference is absolute, not relative, so the | |
830 // following is probably a no-op. | |
831 assert(src->section_index_of(target) == CodeBuffer::SECT_NONE, "sanity"); | |
832 set_value(target); | |
833 } | |
834 | |
835 | |
836 address external_word_Relocation::target() { | |
837 address target = _target; | |
838 if (target == NULL) { | |
839 target = pd_get_address_from_code(); | |
840 } | |
841 return target; | |
842 } | |
843 | |
844 | |
845 void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
846 address target = _target; | |
847 if (target == NULL) { | |
848 if (addr_in_const()) { | |
849 target = new_addr_for(*(address*)addr(), src, dest); | |
850 } else { | |
851 target = new_addr_for(pd_get_address_from_code(), src, dest); | |
852 } | |
853 } | |
854 set_value(target); | |
855 } | |
856 | |
857 | |
858 address internal_word_Relocation::target() { | |
859 address target = _target; | |
860 if (target == NULL) { | |
861 target = pd_get_address_from_code(); | |
862 } | |
863 return target; | |
864 } | |
865 | |
866 //--------------------------------------------------------------------------------- | |
867 // Non-product code | |
868 | |
869 #ifndef PRODUCT | |
870 | |
871 static const char* reloc_type_string(relocInfo::relocType t) { | |
872 switch (t) { | |
873 #define EACH_CASE(name) \ | |
874 case relocInfo::name##_type: \ | |
875 return #name; | |
876 | |
877 APPLY_TO_RELOCATIONS(EACH_CASE); | |
878 #undef EACH_CASE | |
879 | |
880 case relocInfo::none: | |
881 return "none"; | |
882 case relocInfo::data_prefix_tag: | |
883 return "prefix"; | |
884 default: | |
885 return "UNKNOWN RELOC TYPE"; | |
886 } | |
887 } | |
888 | |
889 | |
890 void RelocIterator::print_current() { | |
891 if (!has_current()) { | |
892 tty->print_cr("(no relocs)"); | |
893 return; | |
894 } | |
2002 | 895 tty->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT " offset=%d", |
896 _current, type(), reloc_type_string((relocInfo::relocType) type()), _addr, _current->addr_offset()); | |
0 | 897 if (current()->format() != 0) |
898 tty->print(" format=%d", current()->format()); | |
899 if (datalen() == 1) { | |
900 tty->print(" data=%d", data()[0]); | |
901 } else if (datalen() > 0) { | |
902 tty->print(" data={"); | |
903 for (int i = 0; i < datalen(); i++) { | |
904 tty->print("%04x", data()[i] & 0xFFFF); | |
905 } | |
906 tty->print("}"); | |
907 } | |
908 tty->print("]"); | |
909 switch (type()) { | |
910 case relocInfo::oop_type: | |
911 { | |
912 oop_Relocation* r = oop_reloc(); | |
913 oop* oop_addr = NULL; | |
914 oop raw_oop = NULL; | |
915 oop oop_value = NULL; | |
916 if (code() != NULL || r->oop_is_immediate()) { | |
917 oop_addr = r->oop_addr(); | |
918 raw_oop = *oop_addr; | |
919 oop_value = r->oop_value(); | |
920 } | |
921 tty->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", | |
922 oop_addr, (address)raw_oop, r->offset()); | |
923 // Do not print the oop by default--we want this routine to | |
924 // work even during GC or other inconvenient times. | |
925 if (WizardMode && oop_value != NULL) { | |
926 tty->print("oop_value=" INTPTR_FORMAT ": ", (address)oop_value); | |
927 oop_value->print_value_on(tty); | |
928 } | |
929 break; | |
930 } | |
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931 case relocInfo::metadata_type: |
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932 { |
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933 metadata_Relocation* r = metadata_reloc(); |
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934 Metadata** metadata_addr = NULL; |
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935 Metadata* raw_metadata = NULL; |
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936 Metadata* metadata_value = NULL; |
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937 if (code() != NULL || r->metadata_is_immediate()) { |
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938 metadata_addr = r->metadata_addr(); |
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939 raw_metadata = *metadata_addr; |
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940 metadata_value = r->metadata_value(); |
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941 } |
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942 tty->print(" | [metadata_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", |
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943 metadata_addr, (address)raw_metadata, r->offset()); |
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944 if (metadata_value != NULL) { |
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945 tty->print("metadata_value=" INTPTR_FORMAT ": ", (address)metadata_value); |
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946 metadata_value->print_value_on(tty); |
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947 } |
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948 break; |
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949 } |
0 | 950 case relocInfo::external_word_type: |
951 case relocInfo::internal_word_type: | |
952 case relocInfo::section_word_type: | |
953 { | |
954 DataRelocation* r = (DataRelocation*) reloc(); | |
955 tty->print(" | [target=" INTPTR_FORMAT "]", r->value()); //value==target | |
956 break; | |
957 } | |
958 case relocInfo::static_call_type: | |
959 case relocInfo::runtime_call_type: | |
960 { | |
961 CallRelocation* r = (CallRelocation*) reloc(); | |
962 tty->print(" | [destination=" INTPTR_FORMAT "]", r->destination()); | |
963 break; | |
964 } | |
965 case relocInfo::virtual_call_type: | |
966 { | |
967 virtual_call_Relocation* r = (virtual_call_Relocation*) reloc(); | |
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968 tty->print(" | [destination=" INTPTR_FORMAT " cached_value=" INTPTR_FORMAT "]", |
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969 r->destination(), r->cached_value()); |
0 | 970 break; |
971 } | |
972 case relocInfo::static_stub_type: | |
973 { | |
974 static_stub_Relocation* r = (static_stub_Relocation*) reloc(); | |
975 tty->print(" | [static_call=" INTPTR_FORMAT "]", r->static_call()); | |
976 break; | |
977 } | |
978 } | |
979 tty->cr(); | |
980 } | |
981 | |
982 | |
983 void RelocIterator::print() { | |
984 RelocIterator save_this = (*this); | |
985 relocInfo* scan = _current; | |
986 if (!has_current()) scan += 1; // nothing to scan here! | |
987 | |
988 bool skip_next = has_current(); | |
989 bool got_next; | |
990 while (true) { | |
991 got_next = (skip_next || next()); | |
992 skip_next = false; | |
993 | |
994 tty->print(" @" INTPTR_FORMAT ": ", scan); | |
995 relocInfo* newscan = _current+1; | |
996 if (!has_current()) newscan -= 1; // nothing to scan here! | |
997 while (scan < newscan) { | |
998 tty->print("%04x", *(short*)scan & 0xFFFF); | |
999 scan++; | |
1000 } | |
1001 tty->cr(); | |
1002 | |
1003 if (!got_next) break; | |
1004 print_current(); | |
1005 } | |
1006 | |
1007 (*this) = save_this; | |
1008 } | |
1009 | |
1010 // For the debugger: | |
1011 extern "C" | |
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1012 void print_blob_locs(nmethod* nm) { |
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1013 nm->print(); |
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1014 RelocIterator iter(nm); |
0 | 1015 iter.print(); |
1016 } | |
1017 extern "C" | |
1018 void print_buf_locs(CodeBuffer* cb) { | |
1019 FlagSetting fs(PrintRelocations, true); | |
1020 cb->print(); | |
1021 } | |
1022 #endif // !PRODUCT |