Mercurial > hg > graal-compiler
annotate src/share/vm/code/relocInfo.cpp @ 2181:d25d4ca69222
Merge.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Wed, 16 Feb 2011 13:47:20 +0100 |
parents | ac637b7220d1 |
children | b92c45f2bc75 |
rev | line source |
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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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/compiledIC.hpp" | |
27 #include "code/nmethod.hpp" | |
28 #include "code/relocInfo.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "runtime/stubCodeGenerator.hpp" | |
31 #include "utilities/copy.hpp" | |
32 #ifdef TARGET_ARCH_x86 | |
33 # include "assembler_x86.inline.hpp" | |
34 # include "nativeInst_x86.hpp" | |
35 #endif | |
36 #ifdef TARGET_ARCH_sparc | |
37 # include "assembler_sparc.inline.hpp" | |
38 # include "nativeInst_sparc.hpp" | |
39 #endif | |
40 #ifdef TARGET_ARCH_zero | |
41 # include "assembler_zero.inline.hpp" | |
42 # include "nativeInst_zero.hpp" | |
43 #endif | |
0 | 44 |
45 | |
46 const RelocationHolder RelocationHolder::none; // its type is relocInfo::none | |
47 | |
48 | |
49 // Implementation of relocInfo | |
50 | |
51 #ifdef ASSERT | |
52 relocInfo::relocInfo(relocType t, int off, int f) { | |
53 assert(t != data_prefix_tag, "cannot build a prefix this way"); | |
54 assert((t & type_mask) == t, "wrong type"); | |
55 assert((f & format_mask) == f, "wrong format"); | |
56 assert(off >= 0 && off < offset_limit(), "offset out off bounds"); | |
57 assert((off & (offset_unit-1)) == 0, "misaligned offset"); | |
58 (*this) = relocInfo(t, RAW_BITS, off, f); | |
59 } | |
60 #endif | |
61 | |
62 void relocInfo::initialize(CodeSection* dest, Relocation* reloc) { | |
63 relocInfo* data = this+1; // here's where the data might go | |
64 dest->set_locs_end(data); // sync end: the next call may read dest.locs_end | |
65 reloc->pack_data_to(dest); // maybe write data into locs, advancing locs_end | |
66 relocInfo* data_limit = dest->locs_end(); | |
67 if (data_limit > data) { | |
68 relocInfo suffix = (*this); | |
69 data_limit = this->finish_prefix((short*) data_limit); | |
70 // Finish up with the suffix. (Hack note: pack_data_to might edit this.) | |
71 *data_limit = suffix; | |
72 dest->set_locs_end(data_limit+1); | |
73 } | |
74 } | |
75 | |
76 relocInfo* relocInfo::finish_prefix(short* prefix_limit) { | |
77 assert(sizeof(relocInfo) == sizeof(short), "change this code"); | |
78 short* p = (short*)(this+1); | |
79 assert(prefix_limit >= p, "must be a valid span of data"); | |
80 int plen = prefix_limit - p; | |
81 if (plen == 0) { | |
82 debug_only(_value = 0xFFFF); | |
83 return this; // no data: remove self completely | |
84 } | |
85 if (plen == 1 && fits_into_immediate(p[0])) { | |
86 (*this) = immediate_relocInfo(p[0]); // move data inside self | |
87 return this+1; | |
88 } | |
89 // cannot compact, so just update the count and return the limit pointer | |
90 (*this) = prefix_relocInfo(plen); // write new datalen | |
91 assert(data() + datalen() == prefix_limit, "pointers must line up"); | |
92 return (relocInfo*)prefix_limit; | |
93 } | |
94 | |
95 | |
96 void relocInfo::set_type(relocType t) { | |
97 int old_offset = addr_offset(); | |
98 int old_format = format(); | |
99 (*this) = relocInfo(t, old_offset, old_format); | |
100 assert(type()==(int)t, "sanity check"); | |
101 assert(addr_offset()==old_offset, "sanity check"); | |
102 assert(format()==old_format, "sanity check"); | |
103 } | |
104 | |
105 | |
106 void relocInfo::set_format(int f) { | |
107 int old_offset = addr_offset(); | |
108 assert((f & format_mask) == f, "wrong format"); | |
109 _value = (_value & ~(format_mask << offset_width)) | (f << offset_width); | |
110 assert(addr_offset()==old_offset, "sanity check"); | |
111 } | |
112 | |
113 | |
114 void relocInfo::change_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type, relocType new_type) { | |
115 bool found = false; | |
116 while (itr->next() && !found) { | |
117 if (itr->addr() == pc) { | |
118 assert(itr->type()==old_type, "wrong relocInfo type found"); | |
119 itr->current()->set_type(new_type); | |
120 found=true; | |
121 } | |
122 } | |
123 assert(found, "no relocInfo found for pc"); | |
124 } | |
125 | |
126 | |
127 void relocInfo::remove_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type) { | |
128 change_reloc_info_for_address(itr, pc, old_type, none); | |
129 } | |
130 | |
131 | |
132 // ---------------------------------------------------------------------------------------------------- | |
133 // Implementation of RelocIterator | |
134 | |
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135 void RelocIterator::initialize(nmethod* nm, address begin, address limit) { |
0 | 136 initialize_misc(); |
137 | |
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138 if (nm == NULL && begin != NULL) { |
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139 // allow nmethod to be deduced from beginning address |
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140 CodeBlob* cb = CodeCache::find_blob(begin); |
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141 nm = cb->as_nmethod_or_null(); |
0 | 142 } |
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143 assert(nm != NULL, "must be able to deduce nmethod from other arguments"); |
0 | 144 |
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145 _code = nm; |
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146 _current = nm->relocation_begin() - 1; |
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147 _end = nm->relocation_end(); |
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148 _addr = nm->content_begin(); |
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149 |
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150 // Initialize code sections. |
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151 _section_start[CodeBuffer::SECT_CONSTS] = nm->consts_begin(); |
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152 _section_start[CodeBuffer::SECT_INSTS ] = nm->insts_begin() ; |
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153 _section_start[CodeBuffer::SECT_STUBS ] = nm->stub_begin() ; |
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154 |
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155 _section_end [CodeBuffer::SECT_CONSTS] = nm->consts_end() ; |
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156 _section_end [CodeBuffer::SECT_INSTS ] = nm->insts_end() ; |
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157 _section_end [CodeBuffer::SECT_STUBS ] = nm->stub_end() ; |
0 | 158 |
159 assert(!has_current(), "just checking"); | |
1748 | 160 assert(begin == NULL || begin >= nm->code_begin(), "in bounds"); |
161 assert(limit == NULL || limit <= nm->code_end(), "in bounds"); | |
0 | 162 set_limits(begin, limit); |
163 } | |
164 | |
165 | |
166 RelocIterator::RelocIterator(CodeSection* cs, address begin, address limit) { | |
167 initialize_misc(); | |
168 | |
169 _current = cs->locs_start()-1; | |
170 _end = cs->locs_end(); | |
171 _addr = cs->start(); | |
172 _code = NULL; // Not cb->blob(); | |
173 | |
174 CodeBuffer* cb = cs->outer(); | |
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175 assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal"); |
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176 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) { |
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177 CodeSection* cs = cb->code_section(n); |
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178 _section_start[n] = cs->start(); |
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179 _section_end [n] = cs->end(); |
0 | 180 } |
181 | |
182 assert(!has_current(), "just checking"); | |
183 | |
184 assert(begin == NULL || begin >= cs->start(), "in bounds"); | |
185 assert(limit == NULL || limit <= cs->end(), "in bounds"); | |
186 set_limits(begin, limit); | |
187 } | |
188 | |
189 | |
190 enum { indexCardSize = 128 }; | |
191 struct RelocIndexEntry { | |
192 jint addr_offset; // offset from header_end of an addr() | |
193 jint reloc_offset; // offset from header_end of a relocInfo (prefix) | |
194 }; | |
195 | |
196 | |
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197 bool RelocIterator::addr_in_const() const { |
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198 const int n = CodeBuffer::SECT_CONSTS; |
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199 return section_start(n) <= addr() && addr() < section_end(n); |
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200 } |
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201 |
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202 |
0 | 203 static inline int num_cards(int code_size) { |
204 return (code_size-1) / indexCardSize; | |
205 } | |
206 | |
207 | |
208 int RelocIterator::locs_and_index_size(int code_size, int locs_size) { | |
209 if (!UseRelocIndex) return locs_size; // no index | |
210 code_size = round_to(code_size, oopSize); | |
211 locs_size = round_to(locs_size, oopSize); | |
212 int index_size = num_cards(code_size) * sizeof(RelocIndexEntry); | |
213 // format of indexed relocs: | |
214 // relocation_begin: relocInfo ... | |
215 // index: (addr,reloc#) ... | |
216 // indexSize :relocation_end | |
217 return locs_size + index_size + BytesPerInt; | |
218 } | |
219 | |
220 | |
221 void RelocIterator::create_index(relocInfo* dest_begin, int dest_count, relocInfo* dest_end) { | |
222 address relocation_begin = (address)dest_begin; | |
223 address relocation_end = (address)dest_end; | |
224 int total_size = relocation_end - relocation_begin; | |
225 int locs_size = dest_count * sizeof(relocInfo); | |
226 if (!UseRelocIndex) { | |
227 Copy::fill_to_bytes(relocation_begin + locs_size, total_size-locs_size, 0); | |
228 return; | |
229 } | |
230 int index_size = total_size - locs_size - BytesPerInt; // find out how much space is left | |
231 int ncards = index_size / sizeof(RelocIndexEntry); | |
232 assert(total_size == locs_size + index_size + BytesPerInt, "checkin'"); | |
233 assert(index_size >= 0 && index_size % sizeof(RelocIndexEntry) == 0, "checkin'"); | |
234 jint* index_size_addr = (jint*)relocation_end - 1; | |
235 | |
236 assert(sizeof(jint) == BytesPerInt, "change this code"); | |
237 | |
238 *index_size_addr = index_size; | |
239 if (index_size != 0) { | |
240 assert(index_size > 0, "checkin'"); | |
241 | |
242 RelocIndexEntry* index = (RelocIndexEntry *)(relocation_begin + locs_size); | |
243 assert(index == (RelocIndexEntry*)index_size_addr - ncards, "checkin'"); | |
244 | |
245 // walk over the relocations, and fill in index entries as we go | |
246 RelocIterator iter; | |
247 const address initial_addr = NULL; | |
248 relocInfo* const initial_current = dest_begin - 1; // biased by -1 like elsewhere | |
249 | |
250 iter._code = NULL; | |
251 iter._addr = initial_addr; | |
252 iter._limit = (address)(intptr_t)(ncards * indexCardSize); | |
253 iter._current = initial_current; | |
254 iter._end = dest_begin + dest_count; | |
255 | |
256 int i = 0; | |
257 address next_card_addr = (address)indexCardSize; | |
258 int addr_offset = 0; | |
259 int reloc_offset = 0; | |
260 while (true) { | |
261 // Checkpoint the iterator before advancing it. | |
262 addr_offset = iter._addr - initial_addr; | |
263 reloc_offset = iter._current - initial_current; | |
264 if (!iter.next()) break; | |
265 while (iter.addr() >= next_card_addr) { | |
266 index[i].addr_offset = addr_offset; | |
267 index[i].reloc_offset = reloc_offset; | |
268 i++; | |
269 next_card_addr += indexCardSize; | |
270 } | |
271 } | |
272 while (i < ncards) { | |
273 index[i].addr_offset = addr_offset; | |
274 index[i].reloc_offset = reloc_offset; | |
275 i++; | |
276 } | |
277 } | |
278 } | |
279 | |
280 | |
281 void RelocIterator::set_limits(address begin, address limit) { | |
282 int index_size = 0; | |
283 if (UseRelocIndex && _code != NULL) { | |
284 index_size = ((jint*)_end)[-1]; | |
285 _end = (relocInfo*)( (address)_end - index_size - BytesPerInt ); | |
286 } | |
287 | |
288 _limit = limit; | |
289 | |
290 // the limit affects this next stuff: | |
291 if (begin != NULL) { | |
292 #ifdef ASSERT | |
293 // In ASSERT mode we do not actually use the index, but simply | |
294 // check that its contents would have led us to the right answer. | |
295 address addrCheck = _addr; | |
296 relocInfo* infoCheck = _current; | |
297 #endif // ASSERT | |
298 if (index_size > 0) { | |
299 // skip ahead | |
300 RelocIndexEntry* index = (RelocIndexEntry*)_end; | |
301 RelocIndexEntry* index_limit = (RelocIndexEntry*)((address)index + index_size); | |
1748 | 302 assert(_addr == _code->code_begin(), "_addr must be unadjusted"); |
0 | 303 int card = (begin - _addr) / indexCardSize; |
304 if (card > 0) { | |
305 if (index+card-1 < index_limit) index += card-1; | |
306 else index = index_limit - 1; | |
307 #ifdef ASSERT | |
308 addrCheck = _addr + index->addr_offset; | |
309 infoCheck = _current + index->reloc_offset; | |
310 #else | |
311 // Advance the iterator immediately to the last valid state | |
312 // for the previous card. Calling "next" will then advance | |
313 // it to the first item on the required card. | |
314 _addr += index->addr_offset; | |
315 _current += index->reloc_offset; | |
316 #endif // ASSERT | |
317 } | |
318 } | |
319 | |
320 relocInfo* backup; | |
321 address backup_addr; | |
322 while (true) { | |
323 backup = _current; | |
324 backup_addr = _addr; | |
325 #ifdef ASSERT | |
326 if (backup == infoCheck) { | |
327 assert(backup_addr == addrCheck, "must match"); addrCheck = NULL; infoCheck = NULL; | |
328 } else { | |
329 assert(addrCheck == NULL || backup_addr <= addrCheck, "must not pass addrCheck"); | |
330 } | |
331 #endif // ASSERT | |
332 if (!next() || addr() >= begin) break; | |
333 } | |
334 assert(addrCheck == NULL || addrCheck == backup_addr, "must have matched addrCheck"); | |
335 assert(infoCheck == NULL || infoCheck == backup, "must have matched infoCheck"); | |
336 // At this point, either we are at the first matching record, | |
337 // or else there is no such record, and !has_current(). | |
338 // In either case, revert to the immediatly preceding state. | |
339 _current = backup; | |
340 _addr = backup_addr; | |
341 set_has_current(false); | |
342 } | |
343 } | |
344 | |
345 | |
346 void RelocIterator::set_limit(address limit) { | |
347 address code_end = (address)code() + code()->size(); | |
348 assert(limit == NULL || limit <= code_end, "in bounds"); | |
349 _limit = limit; | |
350 } | |
351 | |
352 | |
353 void PatchingRelocIterator:: prepass() { | |
354 // turn breakpoints off during patching | |
355 _init_state = (*this); // save cursor | |
356 while (next()) { | |
357 if (type() == relocInfo::breakpoint_type) { | |
358 breakpoint_reloc()->set_active(false); | |
359 } | |
360 } | |
361 (RelocIterator&)(*this) = _init_state; // reset cursor for client | |
362 } | |
363 | |
364 | |
365 void PatchingRelocIterator:: postpass() { | |
366 // turn breakpoints back on after patching | |
367 (RelocIterator&)(*this) = _init_state; // reset cursor again | |
368 while (next()) { | |
369 if (type() == relocInfo::breakpoint_type) { | |
370 breakpoint_Relocation* bpt = breakpoint_reloc(); | |
371 bpt->set_active(bpt->enabled()); | |
372 } | |
373 } | |
374 } | |
375 | |
376 | |
377 // All the strange bit-encodings are in here. | |
378 // The idea is to encode relocation data which are small integers | |
379 // very efficiently (a single extra halfword). Larger chunks of | |
380 // relocation data need a halfword header to hold their size. | |
381 void RelocIterator::advance_over_prefix() { | |
382 if (_current->is_datalen()) { | |
383 _data = (short*) _current->data(); | |
384 _datalen = _current->datalen(); | |
385 _current += _datalen + 1; // skip the embedded data & header | |
386 } else { | |
387 _databuf = _current->immediate(); | |
388 _data = &_databuf; | |
389 _datalen = 1; | |
390 _current++; // skip the header | |
391 } | |
392 // The client will see the following relocInfo, whatever that is. | |
393 // It is the reloc to which the preceding data applies. | |
394 } | |
395 | |
396 | |
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397 void RelocIterator::initialize_misc() { |
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398 set_has_current(false); |
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399 for (int i = (int) CodeBuffer::SECT_FIRST; i < (int) CodeBuffer::SECT_LIMIT; i++) { |
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400 _section_start[i] = NULL; // these will be lazily computed, if needed |
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401 _section_end [i] = NULL; |
0 | 402 } |
403 } | |
404 | |
405 | |
406 Relocation* RelocIterator::reloc() { | |
407 // (take the "switch" out-of-line) | |
408 relocInfo::relocType t = type(); | |
409 if (false) {} | |
410 #define EACH_TYPE(name) \ | |
411 else if (t == relocInfo::name##_type) { \ | |
412 return name##_reloc(); \ | |
413 } | |
414 APPLY_TO_RELOCATIONS(EACH_TYPE); | |
415 #undef EACH_TYPE | |
416 assert(t == relocInfo::none, "must be padding"); | |
417 return new(_rh) Relocation(); | |
418 } | |
419 | |
420 | |
421 //////// Methods for flyweight Relocation types | |
422 | |
423 | |
424 RelocationHolder RelocationHolder::plus(int offset) const { | |
425 if (offset != 0) { | |
426 switch (type()) { | |
427 case relocInfo::none: | |
428 break; | |
429 case relocInfo::oop_type: | |
430 { | |
431 oop_Relocation* r = (oop_Relocation*)reloc(); | |
432 return oop_Relocation::spec(r->oop_index(), r->offset() + offset); | |
433 } | |
434 default: | |
435 ShouldNotReachHere(); | |
436 } | |
437 } | |
438 return (*this); | |
439 } | |
440 | |
441 | |
442 void Relocation::guarantee_size() { | |
443 guarantee(false, "Make _relocbuf bigger!"); | |
444 } | |
445 | |
446 // some relocations can compute their own values | |
447 address Relocation::value() { | |
448 ShouldNotReachHere(); | |
449 return NULL; | |
450 } | |
451 | |
452 | |
453 void Relocation::set_value(address x) { | |
454 ShouldNotReachHere(); | |
455 } | |
456 | |
457 | |
458 RelocationHolder Relocation::spec_simple(relocInfo::relocType rtype) { | |
459 if (rtype == relocInfo::none) return RelocationHolder::none; | |
460 relocInfo ri = relocInfo(rtype, 0); | |
461 RelocIterator itr; | |
462 itr.set_current(ri); | |
463 itr.reloc(); | |
464 return itr._rh; | |
465 } | |
466 | |
467 | |
468 static inline bool is_index(intptr_t index) { | |
469 return 0 < index && index < os::vm_page_size(); | |
470 } | |
471 | |
472 | |
473 int32_t Relocation::runtime_address_to_index(address runtime_address) { | |
474 assert(!is_index((intptr_t)runtime_address), "must not look like an index"); | |
475 | |
476 if (runtime_address == NULL) return 0; | |
477 | |
478 StubCodeDesc* p = StubCodeDesc::desc_for(runtime_address); | |
479 if (p != NULL && p->begin() == runtime_address) { | |
480 assert(is_index(p->index()), "there must not be too many stubs"); | |
481 return (int32_t)p->index(); | |
482 } else { | |
483 // Known "miscellaneous" non-stub pointers: | |
484 // os::get_polling_page(), SafepointSynchronize::address_of_state() | |
485 if (PrintRelocations) { | |
486 tty->print_cr("random unregistered address in relocInfo: " INTPTR_FORMAT, runtime_address); | |
487 } | |
488 #ifndef _LP64 | |
489 return (int32_t) (intptr_t)runtime_address; | |
490 #else | |
491 // didn't fit return non-index | |
492 return -1; | |
493 #endif /* _LP64 */ | |
494 } | |
495 } | |
496 | |
497 | |
498 address Relocation::index_to_runtime_address(int32_t index) { | |
499 if (index == 0) return NULL; | |
500 | |
501 if (is_index(index)) { | |
502 StubCodeDesc* p = StubCodeDesc::desc_for_index(index); | |
503 assert(p != NULL, "there must be a stub for this index"); | |
504 return p->begin(); | |
505 } else { | |
506 #ifndef _LP64 | |
507 // this only works on 32bit machines | |
508 return (address) ((intptr_t) index); | |
509 #else | |
510 fatal("Relocation::index_to_runtime_address, int32_t not pointer sized"); | |
511 return NULL; | |
512 #endif /* _LP64 */ | |
513 } | |
514 } | |
515 | |
516 address Relocation::old_addr_for(address newa, | |
517 const CodeBuffer* src, CodeBuffer* dest) { | |
518 int sect = dest->section_index_of(newa); | |
519 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
520 address ostart = src->code_section(sect)->start(); | |
521 address nstart = dest->code_section(sect)->start(); | |
522 return ostart + (newa - nstart); | |
523 } | |
524 | |
525 address Relocation::new_addr_for(address olda, | |
526 const CodeBuffer* src, CodeBuffer* dest) { | |
527 debug_only(const CodeBuffer* src0 = src); | |
528 int sect = CodeBuffer::SECT_NONE; | |
529 // Look for olda in the source buffer, and all previous incarnations | |
530 // if the source buffer has been expanded. | |
531 for (; src != NULL; src = src->before_expand()) { | |
532 sect = src->section_index_of(olda); | |
533 if (sect != CodeBuffer::SECT_NONE) break; | |
534 } | |
535 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
536 address ostart = src->code_section(sect)->start(); | |
537 address nstart = dest->code_section(sect)->start(); | |
538 return nstart + (olda - ostart); | |
539 } | |
540 | |
541 void Relocation::normalize_address(address& addr, const CodeSection* dest, bool allow_other_sections) { | |
542 address addr0 = addr; | |
543 if (addr0 == NULL || dest->allocates2(addr0)) return; | |
544 CodeBuffer* cb = dest->outer(); | |
545 addr = new_addr_for(addr0, cb, cb); | |
546 assert(allow_other_sections || dest->contains2(addr), | |
547 "addr must be in required section"); | |
548 } | |
549 | |
550 | |
551 void CallRelocation::set_destination(address x) { | |
552 pd_set_call_destination(x); | |
553 } | |
554 | |
555 void CallRelocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
556 // Usually a self-relative reference to an external routine. | |
557 // On some platforms, the reference is absolute (not self-relative). | |
558 // The enhanced use of pd_call_destination sorts this all out. | |
559 address orig_addr = old_addr_for(addr(), src, dest); | |
560 address callee = pd_call_destination(orig_addr); | |
561 // Reassert the callee address, this time in the new copy of the code. | |
562 pd_set_call_destination(callee); | |
563 } | |
564 | |
565 | |
566 //// pack/unpack methods | |
567 | |
568 void oop_Relocation::pack_data_to(CodeSection* dest) { | |
569 short* p = (short*) dest->locs_end(); | |
570 p = pack_2_ints_to(p, _oop_index, _offset); | |
571 dest->set_locs_end((relocInfo*) p); | |
572 } | |
573 | |
574 | |
575 void oop_Relocation::unpack_data() { | |
576 unpack_2_ints(_oop_index, _offset); | |
577 } | |
578 | |
579 | |
580 void virtual_call_Relocation::pack_data_to(CodeSection* dest) { | |
581 short* p = (short*) dest->locs_end(); | |
582 address point = dest->locs_point(); | |
583 | |
584 // Try to make a pointer NULL first. | |
585 if (_oop_limit >= point && | |
586 _oop_limit <= point + NativeCall::instruction_size) { | |
587 _oop_limit = NULL; | |
588 } | |
589 // If the _oop_limit is NULL, it "defaults" to the end of the call. | |
590 // See ic_call_Relocation::oop_limit() below. | |
591 | |
592 normalize_address(_first_oop, dest); | |
593 normalize_address(_oop_limit, dest); | |
594 jint x0 = scaled_offset_null_special(_first_oop, point); | |
595 jint x1 = scaled_offset_null_special(_oop_limit, point); | |
596 p = pack_2_ints_to(p, x0, x1); | |
597 dest->set_locs_end((relocInfo*) p); | |
598 } | |
599 | |
600 | |
601 void virtual_call_Relocation::unpack_data() { | |
602 jint x0, x1; unpack_2_ints(x0, x1); | |
603 address point = addr(); | |
604 _first_oop = x0==0? NULL: address_from_scaled_offset(x0, point); | |
605 _oop_limit = x1==0? NULL: address_from_scaled_offset(x1, point); | |
606 } | |
607 | |
608 | |
609 void static_stub_Relocation::pack_data_to(CodeSection* dest) { | |
610 short* p = (short*) dest->locs_end(); | |
611 CodeSection* insts = dest->outer()->insts(); | |
612 normalize_address(_static_call, insts); | |
613 p = pack_1_int_to(p, scaled_offset(_static_call, insts->start())); | |
614 dest->set_locs_end((relocInfo*) p); | |
615 } | |
616 | |
617 void static_stub_Relocation::unpack_data() { | |
618 address base = binding()->section_start(CodeBuffer::SECT_INSTS); | |
619 _static_call = address_from_scaled_offset(unpack_1_int(), base); | |
620 } | |
621 | |
622 | |
623 void external_word_Relocation::pack_data_to(CodeSection* dest) { | |
624 short* p = (short*) dest->locs_end(); | |
625 int32_t index = runtime_address_to_index(_target); | |
626 #ifndef _LP64 | |
627 p = pack_1_int_to(p, index); | |
628 #else | |
629 if (is_index(index)) { | |
630 p = pack_2_ints_to(p, index, 0); | |
631 } else { | |
632 jlong t = (jlong) _target; | |
633 int32_t lo = low(t); | |
634 int32_t hi = high(t); | |
635 p = pack_2_ints_to(p, lo, hi); | |
636 DEBUG_ONLY(jlong t1 = jlong_from(hi, lo)); | |
637 assert(!is_index(t1) && (address) t1 == _target, "not symmetric"); | |
638 } | |
639 #endif /* _LP64 */ | |
640 dest->set_locs_end((relocInfo*) p); | |
641 } | |
642 | |
643 | |
644 void external_word_Relocation::unpack_data() { | |
645 #ifndef _LP64 | |
646 _target = index_to_runtime_address(unpack_1_int()); | |
647 #else | |
648 int32_t lo, hi; | |
649 unpack_2_ints(lo, hi); | |
650 jlong t = jlong_from(hi, lo);; | |
651 if (is_index(t)) { | |
652 _target = index_to_runtime_address(t); | |
653 } else { | |
654 _target = (address) t; | |
655 } | |
656 #endif /* _LP64 */ | |
657 } | |
658 | |
659 | |
660 void internal_word_Relocation::pack_data_to(CodeSection* dest) { | |
661 short* p = (short*) dest->locs_end(); | |
662 normalize_address(_target, dest, true); | |
663 | |
664 // Check whether my target address is valid within this section. | |
665 // If not, strengthen the relocation type to point to another section. | |
666 int sindex = _section; | |
667 if (sindex == CodeBuffer::SECT_NONE && _target != NULL | |
668 && (!dest->allocates(_target) || _target == dest->locs_point())) { | |
669 sindex = dest->outer()->section_index_of(_target); | |
670 guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere"); | |
671 relocInfo* base = dest->locs_end() - 1; | |
672 assert(base->type() == this->type(), "sanity"); | |
673 // Change the written type, to be section_word_type instead. | |
674 base->set_type(relocInfo::section_word_type); | |
675 } | |
676 | |
677 // Note: An internal_word relocation cannot refer to its own instruction, | |
678 // because we reserve "0" to mean that the pointer itself is embedded | |
679 // in the code stream. We use a section_word relocation for such cases. | |
680 | |
681 if (sindex == CodeBuffer::SECT_NONE) { | |
682 assert(type() == relocInfo::internal_word_type, "must be base class"); | |
683 guarantee(_target == NULL || dest->allocates2(_target), "must be within the given code section"); | |
684 jint x0 = scaled_offset_null_special(_target, dest->locs_point()); | |
685 assert(!(x0 == 0 && _target != NULL), "correct encoding of null target"); | |
686 p = pack_1_int_to(p, x0); | |
687 } else { | |
688 assert(_target != NULL, "sanity"); | |
689 CodeSection* sect = dest->outer()->code_section(sindex); | |
690 guarantee(sect->allocates2(_target), "must be in correct section"); | |
691 address base = sect->start(); | |
692 jint offset = scaled_offset(_target, base); | |
693 assert((uint)sindex < (uint)CodeBuffer::SECT_LIMIT, "sanity"); | |
694 assert(CodeBuffer::SECT_LIMIT <= (1 << section_width), "section_width++"); | |
695 p = pack_1_int_to(p, (offset << section_width) | sindex); | |
696 } | |
697 | |
698 dest->set_locs_end((relocInfo*) p); | |
699 } | |
700 | |
701 | |
702 void internal_word_Relocation::unpack_data() { | |
703 jint x0 = unpack_1_int(); | |
704 _target = x0==0? NULL: address_from_scaled_offset(x0, addr()); | |
705 _section = CodeBuffer::SECT_NONE; | |
706 } | |
707 | |
708 | |
709 void section_word_Relocation::unpack_data() { | |
710 jint x = unpack_1_int(); | |
711 jint offset = (x >> section_width); | |
712 int sindex = (x & ((1<<section_width)-1)); | |
713 address base = binding()->section_start(sindex); | |
714 | |
715 _section = sindex; | |
716 _target = address_from_scaled_offset(offset, base); | |
717 } | |
718 | |
719 | |
720 void breakpoint_Relocation::pack_data_to(CodeSection* dest) { | |
721 short* p = (short*) dest->locs_end(); | |
722 address point = dest->locs_point(); | |
723 | |
724 *p++ = _bits; | |
725 | |
726 assert(_target != NULL, "sanity"); | |
727 | |
728 if (internal()) normalize_address(_target, dest); | |
729 | |
730 jint target_bits = | |
731 (jint)( internal() ? scaled_offset (_target, point) | |
732 : runtime_address_to_index(_target) ); | |
733 if (settable()) { | |
734 // save space for set_target later | |
735 p = add_jint(p, target_bits); | |
736 } else { | |
737 p = add_var_int(p, target_bits); | |
738 } | |
739 | |
740 for (int i = 0; i < instrlen(); i++) { | |
741 // put placeholder words until bytes can be saved | |
742 p = add_short(p, (short)0x7777); | |
743 } | |
744 | |
745 dest->set_locs_end((relocInfo*) p); | |
746 } | |
747 | |
748 | |
749 void breakpoint_Relocation::unpack_data() { | |
750 _bits = live_bits(); | |
751 | |
752 int targetlen = datalen() - 1 - instrlen(); | |
753 jint target_bits = 0; | |
754 if (targetlen == 0) target_bits = 0; | |
755 else if (targetlen == 1) target_bits = *(data()+1); | |
756 else if (targetlen == 2) target_bits = relocInfo::jint_from_data(data()+1); | |
757 else { ShouldNotReachHere(); } | |
758 | |
759 _target = internal() ? address_from_scaled_offset(target_bits, addr()) | |
760 : index_to_runtime_address (target_bits); | |
761 } | |
762 | |
763 | |
764 //// miscellaneous methods | |
765 oop* oop_Relocation::oop_addr() { | |
766 int n = _oop_index; | |
767 if (n == 0) { | |
768 // oop is stored in the code stream | |
769 return (oop*) pd_address_in_code(); | |
770 } else { | |
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771 // oop is stored in table at nmethod::oops_begin |
0 | 772 return code()->oop_addr_at(n); |
773 } | |
774 } | |
775 | |
776 | |
777 oop oop_Relocation::oop_value() { | |
778 oop v = *oop_addr(); | |
779 // clean inline caches store a special pseudo-null | |
780 if (v == (oop)Universe::non_oop_word()) v = NULL; | |
781 return v; | |
782 } | |
783 | |
784 | |
785 void oop_Relocation::fix_oop_relocation() { | |
786 if (!oop_is_immediate()) { | |
787 // get the oop from the pool, and re-insert it into the instruction: | |
788 set_value(value()); | |
789 } | |
790 } | |
791 | |
792 | |
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793 RelocIterator virtual_call_Relocation::parse_ic(nmethod* &nm, address &ic_call, address &first_oop, |
0 | 794 oop* &oop_addr, bool *is_optimized) { |
795 assert(ic_call != NULL, "ic_call address must be set"); | |
796 assert(ic_call != NULL || first_oop != NULL, "must supply a non-null input"); | |
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797 if (nm == NULL) { |
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798 CodeBlob* code; |
0 | 799 if (ic_call != NULL) { |
800 code = CodeCache::find_blob(ic_call); | |
801 } else if (first_oop != NULL) { | |
802 code = CodeCache::find_blob(first_oop); | |
803 } | |
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804 nm = code->as_nmethod_or_null(); |
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805 assert(nm != NULL, "address to parse must be in nmethod"); |
0 | 806 } |
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807 assert(ic_call == NULL || nm->contains(ic_call), "must be in nmethod"); |
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808 assert(first_oop == NULL || nm->contains(first_oop), "must be in nmethod"); |
0 | 809 |
810 address oop_limit = NULL; | |
811 | |
812 if (ic_call != NULL) { | |
813 // search for the ic_call at the given address | |
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814 RelocIterator iter(nm, ic_call, ic_call+1); |
0 | 815 bool ret = iter.next(); |
816 assert(ret == true, "relocInfo must exist at this address"); | |
817 assert(iter.addr() == ic_call, "must find ic_call"); | |
818 if (iter.type() == relocInfo::virtual_call_type) { | |
819 virtual_call_Relocation* r = iter.virtual_call_reloc(); | |
820 first_oop = r->first_oop(); | |
821 oop_limit = r->oop_limit(); | |
822 *is_optimized = false; | |
823 } else { | |
824 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); | |
825 *is_optimized = true; | |
826 oop_addr = NULL; | |
827 first_oop = NULL; | |
828 return iter; | |
829 } | |
830 } | |
831 | |
832 // search for the first_oop, to get its oop_addr | |
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833 RelocIterator all_oops(nm, first_oop); |
0 | 834 RelocIterator iter = all_oops; |
835 iter.set_limit(first_oop+1); | |
836 bool found_oop = false; | |
837 while (iter.next()) { | |
838 if (iter.type() == relocInfo::oop_type) { | |
839 assert(iter.addr() == first_oop, "must find first_oop"); | |
840 oop_addr = iter.oop_reloc()->oop_addr(); | |
841 found_oop = true; | |
842 break; | |
843 } | |
844 } | |
845 assert(found_oop, "must find first_oop"); | |
846 | |
847 bool did_reset = false; | |
848 while (ic_call == NULL) { | |
849 // search forward for the ic_call matching the given first_oop | |
850 while (iter.next()) { | |
851 if (iter.type() == relocInfo::virtual_call_type) { | |
852 virtual_call_Relocation* r = iter.virtual_call_reloc(); | |
853 if (r->first_oop() == first_oop) { | |
854 ic_call = r->addr(); | |
855 oop_limit = r->oop_limit(); | |
856 break; | |
857 } | |
858 } | |
859 } | |
860 guarantee(!did_reset, "cannot find ic_call"); | |
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861 iter = RelocIterator(nm); // search the whole nmethod |
0 | 862 did_reset = true; |
863 } | |
864 | |
865 assert(oop_limit != NULL && first_oop != NULL && ic_call != NULL, ""); | |
866 all_oops.set_limit(oop_limit); | |
867 return all_oops; | |
868 } | |
869 | |
870 | |
871 address virtual_call_Relocation::first_oop() { | |
872 assert(_first_oop != NULL && _first_oop < addr(), "must precede ic_call"); | |
873 return _first_oop; | |
874 } | |
875 | |
876 | |
877 address virtual_call_Relocation::oop_limit() { | |
878 if (_oop_limit == NULL) | |
879 return addr() + NativeCall::instruction_size; | |
880 else | |
881 return _oop_limit; | |
882 } | |
883 | |
884 | |
885 | |
886 void virtual_call_Relocation::clear_inline_cache() { | |
887 // No stubs for ICs | |
888 // Clean IC | |
889 ResourceMark rm; | |
890 CompiledIC* icache = CompiledIC_at(this); | |
891 icache->set_to_clean(); | |
892 } | |
893 | |
894 | |
895 void opt_virtual_call_Relocation::clear_inline_cache() { | |
896 // No stubs for ICs | |
897 // Clean IC | |
898 ResourceMark rm; | |
899 CompiledIC* icache = CompiledIC_at(this); | |
900 icache->set_to_clean(); | |
901 } | |
902 | |
903 | |
904 address opt_virtual_call_Relocation::static_stub() { | |
905 // search for the static stub who points back to this static call | |
906 address static_call_addr = addr(); | |
907 RelocIterator iter(code()); | |
908 while (iter.next()) { | |
909 if (iter.type() == relocInfo::static_stub_type) { | |
910 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
911 return iter.addr(); | |
912 } | |
913 } | |
914 } | |
915 return NULL; | |
916 } | |
917 | |
918 | |
919 void static_call_Relocation::clear_inline_cache() { | |
920 // Safe call site info | |
921 CompiledStaticCall* handler = compiledStaticCall_at(this); | |
922 handler->set_to_clean(); | |
923 } | |
924 | |
925 | |
926 address static_call_Relocation::static_stub() { | |
927 // search for the static stub who points back to this static call | |
928 address static_call_addr = addr(); | |
929 RelocIterator iter(code()); | |
930 while (iter.next()) { | |
931 if (iter.type() == relocInfo::static_stub_type) { | |
932 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
933 return iter.addr(); | |
934 } | |
935 } | |
936 } | |
937 return NULL; | |
938 } | |
939 | |
940 | |
941 void static_stub_Relocation::clear_inline_cache() { | |
942 // Call stub is only used when calling the interpreted code. | |
943 // It does not really need to be cleared, except that we want to clean out the methodoop. | |
944 CompiledStaticCall::set_stub_to_clean(this); | |
945 } | |
946 | |
947 | |
948 void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
949 address target = _target; | |
950 if (target == NULL) { | |
951 // An absolute embedded reference to an external location, | |
952 // which means there is nothing to fix here. | |
953 return; | |
954 } | |
955 // Probably this reference is absolute, not relative, so the | |
956 // following is probably a no-op. | |
957 assert(src->section_index_of(target) == CodeBuffer::SECT_NONE, "sanity"); | |
958 set_value(target); | |
959 } | |
960 | |
961 | |
962 address external_word_Relocation::target() { | |
963 address target = _target; | |
964 if (target == NULL) { | |
965 target = pd_get_address_from_code(); | |
966 } | |
967 return target; | |
968 } | |
969 | |
970 | |
971 void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
972 address target = _target; | |
973 if (target == NULL) { | |
974 if (addr_in_const()) { | |
975 target = new_addr_for(*(address*)addr(), src, dest); | |
976 } else { | |
977 target = new_addr_for(pd_get_address_from_code(), src, dest); | |
978 } | |
979 } | |
980 set_value(target); | |
981 } | |
982 | |
983 | |
984 address internal_word_Relocation::target() { | |
985 address target = _target; | |
986 if (target == NULL) { | |
987 target = pd_get_address_from_code(); | |
988 } | |
989 return target; | |
990 } | |
991 | |
992 | |
993 breakpoint_Relocation::breakpoint_Relocation(int kind, address target, bool internal) { | |
994 bool active = false; | |
995 bool enabled = (kind == initialization); | |
996 bool removable = (kind != safepoint); | |
997 bool settable = (target == NULL); | |
998 | |
999 int bits = kind; | |
1000 if (enabled) bits |= enabled_state; | |
1001 if (internal) bits |= internal_attr; | |
1002 if (removable) bits |= removable_attr; | |
1003 if (settable) bits |= settable_attr; | |
1004 | |
1005 _bits = bits | high_bit; | |
1006 _target = target; | |
1007 | |
1008 assert(this->kind() == kind, "kind encoded"); | |
1009 assert(this->enabled() == enabled, "enabled encoded"); | |
1010 assert(this->active() == active, "active encoded"); | |
1011 assert(this->internal() == internal, "internal encoded"); | |
1012 assert(this->removable() == removable, "removable encoded"); | |
1013 assert(this->settable() == settable, "settable encoded"); | |
1014 } | |
1015 | |
1016 | |
1017 address breakpoint_Relocation::target() const { | |
1018 return _target; | |
1019 } | |
1020 | |
1021 | |
1022 void breakpoint_Relocation::set_target(address x) { | |
1023 assert(settable(), "must be settable"); | |
1024 jint target_bits = | |
1025 (jint)(internal() ? scaled_offset (x, addr()) | |
1026 : runtime_address_to_index(x)); | |
1027 short* p = &live_bits() + 1; | |
1028 p = add_jint(p, target_bits); | |
1029 assert(p == instrs(), "new target must fit"); | |
1030 _target = x; | |
1031 } | |
1032 | |
1033 | |
1034 void breakpoint_Relocation::set_enabled(bool b) { | |
1035 if (enabled() == b) return; | |
1036 | |
1037 if (b) { | |
1038 set_bits(bits() | enabled_state); | |
1039 } else { | |
1040 set_active(false); // remove the actual breakpoint insn, if any | |
1041 set_bits(bits() & ~enabled_state); | |
1042 } | |
1043 } | |
1044 | |
1045 | |
1046 void breakpoint_Relocation::set_active(bool b) { | |
1047 assert(!b || enabled(), "cannot activate a disabled breakpoint"); | |
1048 | |
1049 if (active() == b) return; | |
1050 | |
1051 // %%% should probably seize a lock here (might not be the right lock) | |
1052 //MutexLockerEx ml_patch(Patching_lock, true); | |
1053 //if (active() == b) return; // recheck state after locking | |
1054 | |
1055 if (b) { | |
1056 set_bits(bits() | active_state); | |
1057 if (instrlen() == 0) | |
1058 fatal("breakpoints in original code must be undoable"); | |
1059 pd_swap_in_breakpoint (addr(), instrs(), instrlen()); | |
1060 } else { | |
1061 set_bits(bits() & ~active_state); | |
1062 pd_swap_out_breakpoint(addr(), instrs(), instrlen()); | |
1063 } | |
1064 } | |
1065 | |
1066 | |
1067 //--------------------------------------------------------------------------------- | |
1068 // Non-product code | |
1069 | |
1070 #ifndef PRODUCT | |
1071 | |
1072 static const char* reloc_type_string(relocInfo::relocType t) { | |
1073 switch (t) { | |
1074 #define EACH_CASE(name) \ | |
1075 case relocInfo::name##_type: \ | |
1076 return #name; | |
1077 | |
1078 APPLY_TO_RELOCATIONS(EACH_CASE); | |
1079 #undef EACH_CASE | |
1080 | |
1081 case relocInfo::none: | |
1082 return "none"; | |
1083 case relocInfo::data_prefix_tag: | |
1084 return "prefix"; | |
1085 default: | |
1086 return "UNKNOWN RELOC TYPE"; | |
1087 } | |
1088 } | |
1089 | |
1090 | |
1091 void RelocIterator::print_current() { | |
1092 if (!has_current()) { | |
1093 tty->print_cr("(no relocs)"); | |
1094 return; | |
1095 } | |
2002 | 1096 tty->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT " offset=%d", |
1097 _current, type(), reloc_type_string((relocInfo::relocType) type()), _addr, _current->addr_offset()); | |
0 | 1098 if (current()->format() != 0) |
1099 tty->print(" format=%d", current()->format()); | |
1100 if (datalen() == 1) { | |
1101 tty->print(" data=%d", data()[0]); | |
1102 } else if (datalen() > 0) { | |
1103 tty->print(" data={"); | |
1104 for (int i = 0; i < datalen(); i++) { | |
1105 tty->print("%04x", data()[i] & 0xFFFF); | |
1106 } | |
1107 tty->print("}"); | |
1108 } | |
1109 tty->print("]"); | |
1110 switch (type()) { | |
1111 case relocInfo::oop_type: | |
1112 { | |
1113 oop_Relocation* r = oop_reloc(); | |
1114 oop* oop_addr = NULL; | |
1115 oop raw_oop = NULL; | |
1116 oop oop_value = NULL; | |
1117 if (code() != NULL || r->oop_is_immediate()) { | |
1118 oop_addr = r->oop_addr(); | |
1119 raw_oop = *oop_addr; | |
1120 oop_value = r->oop_value(); | |
1121 } | |
1122 tty->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", | |
1123 oop_addr, (address)raw_oop, r->offset()); | |
1124 // Do not print the oop by default--we want this routine to | |
1125 // work even during GC or other inconvenient times. | |
1126 if (WizardMode && oop_value != NULL) { | |
1127 tty->print("oop_value=" INTPTR_FORMAT ": ", (address)oop_value); | |
1128 oop_value->print_value_on(tty); | |
1129 } | |
1130 break; | |
1131 } | |
1132 case relocInfo::external_word_type: | |
1133 case relocInfo::internal_word_type: | |
1134 case relocInfo::section_word_type: | |
1135 { | |
1136 DataRelocation* r = (DataRelocation*) reloc(); | |
1137 tty->print(" | [target=" INTPTR_FORMAT "]", r->value()); //value==target | |
1138 break; | |
1139 } | |
1140 case relocInfo::static_call_type: | |
1141 case relocInfo::runtime_call_type: | |
1142 { | |
1143 CallRelocation* r = (CallRelocation*) reloc(); | |
1144 tty->print(" | [destination=" INTPTR_FORMAT "]", r->destination()); | |
1145 break; | |
1146 } | |
1147 case relocInfo::virtual_call_type: | |
1148 { | |
1149 virtual_call_Relocation* r = (virtual_call_Relocation*) reloc(); | |
1150 tty->print(" | [destination=" INTPTR_FORMAT " first_oop=" INTPTR_FORMAT " oop_limit=" INTPTR_FORMAT "]", | |
1151 r->destination(), r->first_oop(), r->oop_limit()); | |
1152 break; | |
1153 } | |
1154 case relocInfo::static_stub_type: | |
1155 { | |
1156 static_stub_Relocation* r = (static_stub_Relocation*) reloc(); | |
1157 tty->print(" | [static_call=" INTPTR_FORMAT "]", r->static_call()); | |
1158 break; | |
1159 } | |
1160 } | |
1161 tty->cr(); | |
1162 } | |
1163 | |
1164 | |
1165 void RelocIterator::print() { | |
1166 RelocIterator save_this = (*this); | |
1167 relocInfo* scan = _current; | |
1168 if (!has_current()) scan += 1; // nothing to scan here! | |
1169 | |
1170 bool skip_next = has_current(); | |
1171 bool got_next; | |
1172 while (true) { | |
1173 got_next = (skip_next || next()); | |
1174 skip_next = false; | |
1175 | |
1176 tty->print(" @" INTPTR_FORMAT ": ", scan); | |
1177 relocInfo* newscan = _current+1; | |
1178 if (!has_current()) newscan -= 1; // nothing to scan here! | |
1179 while (scan < newscan) { | |
1180 tty->print("%04x", *(short*)scan & 0xFFFF); | |
1181 scan++; | |
1182 } | |
1183 tty->cr(); | |
1184 | |
1185 if (!got_next) break; | |
1186 print_current(); | |
1187 } | |
1188 | |
1189 (*this) = save_this; | |
1190 } | |
1191 | |
1192 // For the debugger: | |
1193 extern "C" | |
1563
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1194 void print_blob_locs(nmethod* nm) { |
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1195 nm->print(); |
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1196 RelocIterator iter(nm); |
0 | 1197 iter.print(); |
1198 } | |
1199 extern "C" | |
1200 void print_buf_locs(CodeBuffer* cb) { | |
1201 FlagSetting fs(PrintRelocations, true); | |
1202 cb->print(); | |
1203 } | |
1204 #endif // !PRODUCT |