Mercurial > hg > truffle
annotate src/share/vm/code/relocInfo.cpp @ 3500:6111c168756f
IdealGraphPrinter can now output bytecodes, enabled by default (GraalOptions.PrintIdealGraphBytecodes)
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 08 Aug 2011 15:19:09 +0200 |
parents | 6c97c830fb6f |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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 | |
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44 #ifdef TARGET_ARCH_arm |
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45 # include "assembler_arm.inline.hpp" |
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46 # include "nativeInst_arm.hpp" |
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47 #endif |
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48 #ifdef TARGET_ARCH_ppc |
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49 # include "assembler_ppc.inline.hpp" |
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50 # include "nativeInst_ppc.hpp" |
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51 #endif |
0 | 52 |
53 | |
54 const RelocationHolder RelocationHolder::none; // its type is relocInfo::none | |
55 | |
56 | |
57 // Implementation of relocInfo | |
58 | |
59 #ifdef ASSERT | |
60 relocInfo::relocInfo(relocType t, int off, int f) { | |
61 assert(t != data_prefix_tag, "cannot build a prefix this way"); | |
62 assert((t & type_mask) == t, "wrong type"); | |
63 assert((f & format_mask) == f, "wrong format"); | |
64 assert(off >= 0 && off < offset_limit(), "offset out off bounds"); | |
65 assert((off & (offset_unit-1)) == 0, "misaligned offset"); | |
66 (*this) = relocInfo(t, RAW_BITS, off, f); | |
67 } | |
68 #endif | |
69 | |
70 void relocInfo::initialize(CodeSection* dest, Relocation* reloc) { | |
71 relocInfo* data = this+1; // here's where the data might go | |
72 dest->set_locs_end(data); // sync end: the next call may read dest.locs_end | |
73 reloc->pack_data_to(dest); // maybe write data into locs, advancing locs_end | |
74 relocInfo* data_limit = dest->locs_end(); | |
75 if (data_limit > data) { | |
76 relocInfo suffix = (*this); | |
77 data_limit = this->finish_prefix((short*) data_limit); | |
78 // Finish up with the suffix. (Hack note: pack_data_to might edit this.) | |
79 *data_limit = suffix; | |
80 dest->set_locs_end(data_limit+1); | |
81 } | |
82 } | |
83 | |
84 relocInfo* relocInfo::finish_prefix(short* prefix_limit) { | |
85 assert(sizeof(relocInfo) == sizeof(short), "change this code"); | |
86 short* p = (short*)(this+1); | |
87 assert(prefix_limit >= p, "must be a valid span of data"); | |
88 int plen = prefix_limit - p; | |
89 if (plen == 0) { | |
90 debug_only(_value = 0xFFFF); | |
91 return this; // no data: remove self completely | |
92 } | |
93 if (plen == 1 && fits_into_immediate(p[0])) { | |
94 (*this) = immediate_relocInfo(p[0]); // move data inside self | |
95 return this+1; | |
96 } | |
97 // cannot compact, so just update the count and return the limit pointer | |
98 (*this) = prefix_relocInfo(plen); // write new datalen | |
99 assert(data() + datalen() == prefix_limit, "pointers must line up"); | |
100 return (relocInfo*)prefix_limit; | |
101 } | |
102 | |
103 | |
104 void relocInfo::set_type(relocType t) { | |
105 int old_offset = addr_offset(); | |
106 int old_format = format(); | |
107 (*this) = relocInfo(t, old_offset, old_format); | |
108 assert(type()==(int)t, "sanity check"); | |
109 assert(addr_offset()==old_offset, "sanity check"); | |
110 assert(format()==old_format, "sanity check"); | |
111 } | |
112 | |
113 | |
114 void relocInfo::set_format(int f) { | |
115 int old_offset = addr_offset(); | |
116 assert((f & format_mask) == f, "wrong format"); | |
117 _value = (_value & ~(format_mask << offset_width)) | (f << offset_width); | |
118 assert(addr_offset()==old_offset, "sanity check"); | |
119 } | |
120 | |
121 | |
122 void relocInfo::change_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type, relocType new_type) { | |
123 bool found = false; | |
124 while (itr->next() && !found) { | |
125 if (itr->addr() == pc) { | |
126 assert(itr->type()==old_type, "wrong relocInfo type found"); | |
127 itr->current()->set_type(new_type); | |
128 found=true; | |
129 } | |
130 } | |
131 assert(found, "no relocInfo found for pc"); | |
132 } | |
133 | |
134 | |
135 void relocInfo::remove_reloc_info_for_address(RelocIterator *itr, address pc, relocType old_type) { | |
136 change_reloc_info_for_address(itr, pc, old_type, none); | |
137 } | |
138 | |
139 | |
140 // ---------------------------------------------------------------------------------------------------- | |
141 // Implementation of RelocIterator | |
142 | |
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143 void RelocIterator::initialize(nmethod* nm, address begin, address limit) { |
0 | 144 initialize_misc(); |
145 | |
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146 if (nm == NULL && begin != NULL) { |
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147 // allow nmethod to be deduced from beginning address |
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148 CodeBlob* cb = CodeCache::find_blob(begin); |
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149 nm = cb->as_nmethod_or_null(); |
0 | 150 } |
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151 assert(nm != NULL, "must be able to deduce nmethod from other arguments"); |
0 | 152 |
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153 _code = nm; |
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154 _current = nm->relocation_begin() - 1; |
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155 _end = nm->relocation_end(); |
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156 _addr = nm->content_begin(); |
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157 |
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158 // Initialize code sections. |
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159 _section_start[CodeBuffer::SECT_CONSTS] = nm->consts_begin(); |
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160 _section_start[CodeBuffer::SECT_INSTS ] = nm->insts_begin() ; |
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161 _section_start[CodeBuffer::SECT_STUBS ] = nm->stub_begin() ; |
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162 |
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163 _section_end [CodeBuffer::SECT_CONSTS] = nm->consts_end() ; |
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164 _section_end [CodeBuffer::SECT_INSTS ] = nm->insts_end() ; |
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165 _section_end [CodeBuffer::SECT_STUBS ] = nm->stub_end() ; |
0 | 166 |
167 assert(!has_current(), "just checking"); | |
1748 | 168 assert(begin == NULL || begin >= nm->code_begin(), "in bounds"); |
169 assert(limit == NULL || limit <= nm->code_end(), "in bounds"); | |
0 | 170 set_limits(begin, limit); |
171 } | |
172 | |
173 | |
174 RelocIterator::RelocIterator(CodeSection* cs, address begin, address limit) { | |
175 initialize_misc(); | |
176 | |
177 _current = cs->locs_start()-1; | |
178 _end = cs->locs_end(); | |
179 _addr = cs->start(); | |
180 _code = NULL; // Not cb->blob(); | |
181 | |
182 CodeBuffer* cb = cs->outer(); | |
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183 assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal"); |
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184 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) { |
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185 CodeSection* cs = cb->code_section(n); |
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186 _section_start[n] = cs->start(); |
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187 _section_end [n] = cs->end(); |
0 | 188 } |
189 | |
190 assert(!has_current(), "just checking"); | |
191 | |
192 assert(begin == NULL || begin >= cs->start(), "in bounds"); | |
193 assert(limit == NULL || limit <= cs->end(), "in bounds"); | |
194 set_limits(begin, limit); | |
195 } | |
196 | |
197 | |
198 enum { indexCardSize = 128 }; | |
199 struct RelocIndexEntry { | |
200 jint addr_offset; // offset from header_end of an addr() | |
201 jint reloc_offset; // offset from header_end of a relocInfo (prefix) | |
202 }; | |
203 | |
204 | |
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205 bool RelocIterator::addr_in_const() const { |
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206 const int n = CodeBuffer::SECT_CONSTS; |
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207 return section_start(n) <= addr() && addr() < section_end(n); |
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208 } |
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209 |
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210 |
0 | 211 static inline int num_cards(int code_size) { |
212 return (code_size-1) / indexCardSize; | |
213 } | |
214 | |
215 | |
216 int RelocIterator::locs_and_index_size(int code_size, int locs_size) { | |
217 if (!UseRelocIndex) return locs_size; // no index | |
218 code_size = round_to(code_size, oopSize); | |
219 locs_size = round_to(locs_size, oopSize); | |
220 int index_size = num_cards(code_size) * sizeof(RelocIndexEntry); | |
221 // format of indexed relocs: | |
222 // relocation_begin: relocInfo ... | |
223 // index: (addr,reloc#) ... | |
224 // indexSize :relocation_end | |
225 return locs_size + index_size + BytesPerInt; | |
226 } | |
227 | |
228 | |
229 void RelocIterator::create_index(relocInfo* dest_begin, int dest_count, relocInfo* dest_end) { | |
230 address relocation_begin = (address)dest_begin; | |
231 address relocation_end = (address)dest_end; | |
232 int total_size = relocation_end - relocation_begin; | |
233 int locs_size = dest_count * sizeof(relocInfo); | |
234 if (!UseRelocIndex) { | |
235 Copy::fill_to_bytes(relocation_begin + locs_size, total_size-locs_size, 0); | |
236 return; | |
237 } | |
238 int index_size = total_size - locs_size - BytesPerInt; // find out how much space is left | |
239 int ncards = index_size / sizeof(RelocIndexEntry); | |
240 assert(total_size == locs_size + index_size + BytesPerInt, "checkin'"); | |
241 assert(index_size >= 0 && index_size % sizeof(RelocIndexEntry) == 0, "checkin'"); | |
242 jint* index_size_addr = (jint*)relocation_end - 1; | |
243 | |
244 assert(sizeof(jint) == BytesPerInt, "change this code"); | |
245 | |
246 *index_size_addr = index_size; | |
247 if (index_size != 0) { | |
248 assert(index_size > 0, "checkin'"); | |
249 | |
250 RelocIndexEntry* index = (RelocIndexEntry *)(relocation_begin + locs_size); | |
251 assert(index == (RelocIndexEntry*)index_size_addr - ncards, "checkin'"); | |
252 | |
253 // walk over the relocations, and fill in index entries as we go | |
254 RelocIterator iter; | |
255 const address initial_addr = NULL; | |
256 relocInfo* const initial_current = dest_begin - 1; // biased by -1 like elsewhere | |
257 | |
258 iter._code = NULL; | |
259 iter._addr = initial_addr; | |
260 iter._limit = (address)(intptr_t)(ncards * indexCardSize); | |
261 iter._current = initial_current; | |
262 iter._end = dest_begin + dest_count; | |
263 | |
264 int i = 0; | |
265 address next_card_addr = (address)indexCardSize; | |
266 int addr_offset = 0; | |
267 int reloc_offset = 0; | |
268 while (true) { | |
269 // Checkpoint the iterator before advancing it. | |
270 addr_offset = iter._addr - initial_addr; | |
271 reloc_offset = iter._current - initial_current; | |
272 if (!iter.next()) break; | |
273 while (iter.addr() >= next_card_addr) { | |
274 index[i].addr_offset = addr_offset; | |
275 index[i].reloc_offset = reloc_offset; | |
276 i++; | |
277 next_card_addr += indexCardSize; | |
278 } | |
279 } | |
280 while (i < ncards) { | |
281 index[i].addr_offset = addr_offset; | |
282 index[i].reloc_offset = reloc_offset; | |
283 i++; | |
284 } | |
285 } | |
286 } | |
287 | |
288 | |
289 void RelocIterator::set_limits(address begin, address limit) { | |
290 int index_size = 0; | |
291 if (UseRelocIndex && _code != NULL) { | |
292 index_size = ((jint*)_end)[-1]; | |
293 _end = (relocInfo*)( (address)_end - index_size - BytesPerInt ); | |
294 } | |
295 | |
296 _limit = limit; | |
297 | |
298 // the limit affects this next stuff: | |
299 if (begin != NULL) { | |
300 #ifdef ASSERT | |
301 // In ASSERT mode we do not actually use the index, but simply | |
302 // check that its contents would have led us to the right answer. | |
303 address addrCheck = _addr; | |
304 relocInfo* infoCheck = _current; | |
305 #endif // ASSERT | |
306 if (index_size > 0) { | |
307 // skip ahead | |
308 RelocIndexEntry* index = (RelocIndexEntry*)_end; | |
309 RelocIndexEntry* index_limit = (RelocIndexEntry*)((address)index + index_size); | |
1748 | 310 assert(_addr == _code->code_begin(), "_addr must be unadjusted"); |
0 | 311 int card = (begin - _addr) / indexCardSize; |
312 if (card > 0) { | |
313 if (index+card-1 < index_limit) index += card-1; | |
314 else index = index_limit - 1; | |
315 #ifdef ASSERT | |
316 addrCheck = _addr + index->addr_offset; | |
317 infoCheck = _current + index->reloc_offset; | |
318 #else | |
319 // Advance the iterator immediately to the last valid state | |
320 // for the previous card. Calling "next" will then advance | |
321 // it to the first item on the required card. | |
322 _addr += index->addr_offset; | |
323 _current += index->reloc_offset; | |
324 #endif // ASSERT | |
325 } | |
326 } | |
327 | |
328 relocInfo* backup; | |
329 address backup_addr; | |
330 while (true) { | |
331 backup = _current; | |
332 backup_addr = _addr; | |
333 #ifdef ASSERT | |
334 if (backup == infoCheck) { | |
335 assert(backup_addr == addrCheck, "must match"); addrCheck = NULL; infoCheck = NULL; | |
336 } else { | |
337 assert(addrCheck == NULL || backup_addr <= addrCheck, "must not pass addrCheck"); | |
338 } | |
339 #endif // ASSERT | |
340 if (!next() || addr() >= begin) break; | |
341 } | |
342 assert(addrCheck == NULL || addrCheck == backup_addr, "must have matched addrCheck"); | |
343 assert(infoCheck == NULL || infoCheck == backup, "must have matched infoCheck"); | |
344 // At this point, either we are at the first matching record, | |
345 // or else there is no such record, and !has_current(). | |
346 // In either case, revert to the immediatly preceding state. | |
347 _current = backup; | |
348 _addr = backup_addr; | |
349 set_has_current(false); | |
350 } | |
351 } | |
352 | |
353 | |
354 void RelocIterator::set_limit(address limit) { | |
355 address code_end = (address)code() + code()->size(); | |
356 assert(limit == NULL || limit <= code_end, "in bounds"); | |
357 _limit = limit; | |
358 } | |
359 | |
360 | |
361 void PatchingRelocIterator:: prepass() { | |
362 // turn breakpoints off during patching | |
363 _init_state = (*this); // save cursor | |
364 while (next()) { | |
365 if (type() == relocInfo::breakpoint_type) { | |
366 breakpoint_reloc()->set_active(false); | |
367 } | |
368 } | |
369 (RelocIterator&)(*this) = _init_state; // reset cursor for client | |
370 } | |
371 | |
372 | |
373 void PatchingRelocIterator:: postpass() { | |
374 // turn breakpoints back on after patching | |
375 (RelocIterator&)(*this) = _init_state; // reset cursor again | |
376 while (next()) { | |
377 if (type() == relocInfo::breakpoint_type) { | |
378 breakpoint_Relocation* bpt = breakpoint_reloc(); | |
379 bpt->set_active(bpt->enabled()); | |
380 } | |
381 } | |
382 } | |
383 | |
384 | |
385 // All the strange bit-encodings are in here. | |
386 // The idea is to encode relocation data which are small integers | |
387 // very efficiently (a single extra halfword). Larger chunks of | |
388 // relocation data need a halfword header to hold their size. | |
389 void RelocIterator::advance_over_prefix() { | |
390 if (_current->is_datalen()) { | |
391 _data = (short*) _current->data(); | |
392 _datalen = _current->datalen(); | |
393 _current += _datalen + 1; // skip the embedded data & header | |
394 } else { | |
395 _databuf = _current->immediate(); | |
396 _data = &_databuf; | |
397 _datalen = 1; | |
398 _current++; // skip the header | |
399 } | |
400 // The client will see the following relocInfo, whatever that is. | |
401 // It is the reloc to which the preceding data applies. | |
402 } | |
403 | |
404 | |
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405 void RelocIterator::initialize_misc() { |
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406 set_has_current(false); |
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407 for (int i = (int) CodeBuffer::SECT_FIRST; i < (int) CodeBuffer::SECT_LIMIT; i++) { |
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408 _section_start[i] = NULL; // these will be lazily computed, if needed |
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409 _section_end [i] = NULL; |
0 | 410 } |
411 } | |
412 | |
413 | |
414 Relocation* RelocIterator::reloc() { | |
415 // (take the "switch" out-of-line) | |
416 relocInfo::relocType t = type(); | |
417 if (false) {} | |
418 #define EACH_TYPE(name) \ | |
419 else if (t == relocInfo::name##_type) { \ | |
420 return name##_reloc(); \ | |
421 } | |
422 APPLY_TO_RELOCATIONS(EACH_TYPE); | |
423 #undef EACH_TYPE | |
424 assert(t == relocInfo::none, "must be padding"); | |
425 return new(_rh) Relocation(); | |
426 } | |
427 | |
428 | |
429 //////// Methods for flyweight Relocation types | |
430 | |
431 | |
432 RelocationHolder RelocationHolder::plus(int offset) const { | |
433 if (offset != 0) { | |
434 switch (type()) { | |
435 case relocInfo::none: | |
436 break; | |
437 case relocInfo::oop_type: | |
438 { | |
439 oop_Relocation* r = (oop_Relocation*)reloc(); | |
440 return oop_Relocation::spec(r->oop_index(), r->offset() + offset); | |
441 } | |
442 default: | |
443 ShouldNotReachHere(); | |
444 } | |
445 } | |
446 return (*this); | |
447 } | |
448 | |
449 | |
450 void Relocation::guarantee_size() { | |
451 guarantee(false, "Make _relocbuf bigger!"); | |
452 } | |
453 | |
454 // some relocations can compute their own values | |
455 address Relocation::value() { | |
456 ShouldNotReachHere(); | |
457 return NULL; | |
458 } | |
459 | |
460 | |
461 void Relocation::set_value(address x) { | |
462 ShouldNotReachHere(); | |
463 } | |
464 | |
465 | |
466 RelocationHolder Relocation::spec_simple(relocInfo::relocType rtype) { | |
467 if (rtype == relocInfo::none) return RelocationHolder::none; | |
468 relocInfo ri = relocInfo(rtype, 0); | |
469 RelocIterator itr; | |
470 itr.set_current(ri); | |
471 itr.reloc(); | |
472 return itr._rh; | |
473 } | |
474 | |
475 int32_t Relocation::runtime_address_to_index(address runtime_address) { | |
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476 assert(!is_reloc_index((intptr_t)runtime_address), "must not look like an index"); |
0 | 477 |
478 if (runtime_address == NULL) return 0; | |
479 | |
480 StubCodeDesc* p = StubCodeDesc::desc_for(runtime_address); | |
481 if (p != NULL && p->begin() == runtime_address) { | |
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482 assert(is_reloc_index(p->index()), "there must not be too many stubs"); |
0 | 483 return (int32_t)p->index(); |
484 } else { | |
485 // Known "miscellaneous" non-stub pointers: | |
486 // os::get_polling_page(), SafepointSynchronize::address_of_state() | |
487 if (PrintRelocations) { | |
488 tty->print_cr("random unregistered address in relocInfo: " INTPTR_FORMAT, runtime_address); | |
489 } | |
490 #ifndef _LP64 | |
491 return (int32_t) (intptr_t)runtime_address; | |
492 #else | |
493 // didn't fit return non-index | |
494 return -1; | |
495 #endif /* _LP64 */ | |
496 } | |
497 } | |
498 | |
499 | |
500 address Relocation::index_to_runtime_address(int32_t index) { | |
501 if (index == 0) return NULL; | |
502 | |
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503 if (is_reloc_index(index)) { |
0 | 504 StubCodeDesc* p = StubCodeDesc::desc_for_index(index); |
505 assert(p != NULL, "there must be a stub for this index"); | |
506 return p->begin(); | |
507 } else { | |
508 #ifndef _LP64 | |
509 // this only works on 32bit machines | |
510 return (address) ((intptr_t) index); | |
511 #else | |
512 fatal("Relocation::index_to_runtime_address, int32_t not pointer sized"); | |
513 return NULL; | |
514 #endif /* _LP64 */ | |
515 } | |
516 } | |
517 | |
518 address Relocation::old_addr_for(address newa, | |
519 const CodeBuffer* src, CodeBuffer* dest) { | |
520 int sect = dest->section_index_of(newa); | |
521 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
522 address ostart = src->code_section(sect)->start(); | |
523 address nstart = dest->code_section(sect)->start(); | |
524 return ostart + (newa - nstart); | |
525 } | |
526 | |
527 address Relocation::new_addr_for(address olda, | |
528 const CodeBuffer* src, CodeBuffer* dest) { | |
529 debug_only(const CodeBuffer* src0 = src); | |
530 int sect = CodeBuffer::SECT_NONE; | |
531 // Look for olda in the source buffer, and all previous incarnations | |
532 // if the source buffer has been expanded. | |
533 for (; src != NULL; src = src->before_expand()) { | |
534 sect = src->section_index_of(olda); | |
535 if (sect != CodeBuffer::SECT_NONE) break; | |
536 } | |
537 guarantee(sect != CodeBuffer::SECT_NONE, "lost track of this address"); | |
538 address ostart = src->code_section(sect)->start(); | |
539 address nstart = dest->code_section(sect)->start(); | |
540 return nstart + (olda - ostart); | |
541 } | |
542 | |
543 void Relocation::normalize_address(address& addr, const CodeSection* dest, bool allow_other_sections) { | |
544 address addr0 = addr; | |
545 if (addr0 == NULL || dest->allocates2(addr0)) return; | |
546 CodeBuffer* cb = dest->outer(); | |
547 addr = new_addr_for(addr0, cb, cb); | |
548 assert(allow_other_sections || dest->contains2(addr), | |
549 "addr must be in required section"); | |
550 } | |
551 | |
552 | |
553 void CallRelocation::set_destination(address x) { | |
554 pd_set_call_destination(x); | |
555 } | |
556 | |
557 void CallRelocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
558 // Usually a self-relative reference to an external routine. | |
559 // On some platforms, the reference is absolute (not self-relative). | |
560 // The enhanced use of pd_call_destination sorts this all out. | |
561 address orig_addr = old_addr_for(addr(), src, dest); | |
562 address callee = pd_call_destination(orig_addr); | |
563 // Reassert the callee address, this time in the new copy of the code. | |
564 pd_set_call_destination(callee); | |
565 } | |
566 | |
567 | |
568 //// pack/unpack methods | |
569 | |
570 void oop_Relocation::pack_data_to(CodeSection* dest) { | |
571 short* p = (short*) dest->locs_end(); | |
572 p = pack_2_ints_to(p, _oop_index, _offset); | |
573 dest->set_locs_end((relocInfo*) p); | |
574 } | |
575 | |
576 | |
577 void oop_Relocation::unpack_data() { | |
578 unpack_2_ints(_oop_index, _offset); | |
579 } | |
580 | |
581 | |
582 void virtual_call_Relocation::pack_data_to(CodeSection* dest) { | |
583 short* p = (short*) dest->locs_end(); | |
584 address point = dest->locs_point(); | |
585 | |
586 // Try to make a pointer NULL first. | |
587 if (_oop_limit >= point && | |
588 _oop_limit <= point + NativeCall::instruction_size) { | |
589 _oop_limit = NULL; | |
590 } | |
591 // If the _oop_limit is NULL, it "defaults" to the end of the call. | |
592 // See ic_call_Relocation::oop_limit() below. | |
593 | |
594 normalize_address(_first_oop, dest); | |
595 normalize_address(_oop_limit, dest); | |
596 jint x0 = scaled_offset_null_special(_first_oop, point); | |
597 jint x1 = scaled_offset_null_special(_oop_limit, point); | |
598 p = pack_2_ints_to(p, x0, x1); | |
599 dest->set_locs_end((relocInfo*) p); | |
600 } | |
601 | |
602 | |
603 void virtual_call_Relocation::unpack_data() { | |
604 jint x0, x1; unpack_2_ints(x0, x1); | |
605 address point = addr(); | |
606 _first_oop = x0==0? NULL: address_from_scaled_offset(x0, point); | |
607 _oop_limit = x1==0? NULL: address_from_scaled_offset(x1, point); | |
608 } | |
609 | |
610 | |
611 void static_stub_Relocation::pack_data_to(CodeSection* dest) { | |
612 short* p = (short*) dest->locs_end(); | |
613 CodeSection* insts = dest->outer()->insts(); | |
614 normalize_address(_static_call, insts); | |
615 p = pack_1_int_to(p, scaled_offset(_static_call, insts->start())); | |
616 dest->set_locs_end((relocInfo*) p); | |
617 } | |
618 | |
619 void static_stub_Relocation::unpack_data() { | |
620 address base = binding()->section_start(CodeBuffer::SECT_INSTS); | |
621 _static_call = address_from_scaled_offset(unpack_1_int(), base); | |
622 } | |
623 | |
624 | |
625 void external_word_Relocation::pack_data_to(CodeSection* dest) { | |
626 short* p = (short*) dest->locs_end(); | |
627 int32_t index = runtime_address_to_index(_target); | |
628 #ifndef _LP64 | |
629 p = pack_1_int_to(p, index); | |
630 #else | |
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631 if (is_reloc_index(index)) { |
0 | 632 p = pack_2_ints_to(p, index, 0); |
633 } else { | |
634 jlong t = (jlong) _target; | |
635 int32_t lo = low(t); | |
636 int32_t hi = high(t); | |
637 p = pack_2_ints_to(p, lo, hi); | |
638 DEBUG_ONLY(jlong t1 = jlong_from(hi, lo)); | |
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639 assert(!is_reloc_index(t1) && (address) t1 == _target, "not symmetric"); |
0 | 640 } |
641 #endif /* _LP64 */ | |
642 dest->set_locs_end((relocInfo*) p); | |
643 } | |
644 | |
645 | |
646 void external_word_Relocation::unpack_data() { | |
647 #ifndef _LP64 | |
648 _target = index_to_runtime_address(unpack_1_int()); | |
649 #else | |
650 int32_t lo, hi; | |
651 unpack_2_ints(lo, hi); | |
652 jlong t = jlong_from(hi, lo);; | |
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653 if (is_reloc_index(t)) { |
0 | 654 _target = index_to_runtime_address(t); |
655 } else { | |
656 _target = (address) t; | |
657 } | |
658 #endif /* _LP64 */ | |
659 } | |
660 | |
661 | |
662 void internal_word_Relocation::pack_data_to(CodeSection* dest) { | |
663 short* p = (short*) dest->locs_end(); | |
664 normalize_address(_target, dest, true); | |
665 | |
666 // Check whether my target address is valid within this section. | |
667 // If not, strengthen the relocation type to point to another section. | |
668 int sindex = _section; | |
669 if (sindex == CodeBuffer::SECT_NONE && _target != NULL | |
670 && (!dest->allocates(_target) || _target == dest->locs_point())) { | |
671 sindex = dest->outer()->section_index_of(_target); | |
672 guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere"); | |
673 relocInfo* base = dest->locs_end() - 1; | |
674 assert(base->type() == this->type(), "sanity"); | |
675 // Change the written type, to be section_word_type instead. | |
676 base->set_type(relocInfo::section_word_type); | |
677 } | |
678 | |
679 // Note: An internal_word relocation cannot refer to its own instruction, | |
680 // because we reserve "0" to mean that the pointer itself is embedded | |
681 // in the code stream. We use a section_word relocation for such cases. | |
682 | |
683 if (sindex == CodeBuffer::SECT_NONE) { | |
684 assert(type() == relocInfo::internal_word_type, "must be base class"); | |
685 guarantee(_target == NULL || dest->allocates2(_target), "must be within the given code section"); | |
686 jint x0 = scaled_offset_null_special(_target, dest->locs_point()); | |
687 assert(!(x0 == 0 && _target != NULL), "correct encoding of null target"); | |
688 p = pack_1_int_to(p, x0); | |
689 } else { | |
690 assert(_target != NULL, "sanity"); | |
691 CodeSection* sect = dest->outer()->code_section(sindex); | |
692 guarantee(sect->allocates2(_target), "must be in correct section"); | |
693 address base = sect->start(); | |
694 jint offset = scaled_offset(_target, base); | |
695 assert((uint)sindex < (uint)CodeBuffer::SECT_LIMIT, "sanity"); | |
696 assert(CodeBuffer::SECT_LIMIT <= (1 << section_width), "section_width++"); | |
697 p = pack_1_int_to(p, (offset << section_width) | sindex); | |
698 } | |
699 | |
700 dest->set_locs_end((relocInfo*) p); | |
701 } | |
702 | |
703 | |
704 void internal_word_Relocation::unpack_data() { | |
705 jint x0 = unpack_1_int(); | |
706 _target = x0==0? NULL: address_from_scaled_offset(x0, addr()); | |
707 _section = CodeBuffer::SECT_NONE; | |
708 } | |
709 | |
710 | |
711 void section_word_Relocation::unpack_data() { | |
712 jint x = unpack_1_int(); | |
713 jint offset = (x >> section_width); | |
714 int sindex = (x & ((1<<section_width)-1)); | |
715 address base = binding()->section_start(sindex); | |
716 | |
717 _section = sindex; | |
718 _target = address_from_scaled_offset(offset, base); | |
719 } | |
720 | |
721 | |
722 void breakpoint_Relocation::pack_data_to(CodeSection* dest) { | |
723 short* p = (short*) dest->locs_end(); | |
724 address point = dest->locs_point(); | |
725 | |
726 *p++ = _bits; | |
727 | |
728 assert(_target != NULL, "sanity"); | |
729 | |
730 if (internal()) normalize_address(_target, dest); | |
731 | |
732 jint target_bits = | |
733 (jint)( internal() ? scaled_offset (_target, point) | |
734 : runtime_address_to_index(_target) ); | |
735 if (settable()) { | |
736 // save space for set_target later | |
737 p = add_jint(p, target_bits); | |
738 } else { | |
739 p = add_var_int(p, target_bits); | |
740 } | |
741 | |
742 for (int i = 0; i < instrlen(); i++) { | |
743 // put placeholder words until bytes can be saved | |
744 p = add_short(p, (short)0x7777); | |
745 } | |
746 | |
747 dest->set_locs_end((relocInfo*) p); | |
748 } | |
749 | |
750 | |
751 void breakpoint_Relocation::unpack_data() { | |
752 _bits = live_bits(); | |
753 | |
754 int targetlen = datalen() - 1 - instrlen(); | |
755 jint target_bits = 0; | |
756 if (targetlen == 0) target_bits = 0; | |
757 else if (targetlen == 1) target_bits = *(data()+1); | |
758 else if (targetlen == 2) target_bits = relocInfo::jint_from_data(data()+1); | |
759 else { ShouldNotReachHere(); } | |
760 | |
761 _target = internal() ? address_from_scaled_offset(target_bits, addr()) | |
762 : index_to_runtime_address (target_bits); | |
763 } | |
764 | |
765 | |
766 //// miscellaneous methods | |
767 oop* oop_Relocation::oop_addr() { | |
768 int n = _oop_index; | |
769 if (n == 0) { | |
770 // oop is stored in the code stream | |
771 return (oop*) pd_address_in_code(); | |
772 } else { | |
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773 // oop is stored in table at nmethod::oops_begin |
0 | 774 return code()->oop_addr_at(n); |
775 } | |
776 } | |
777 | |
778 | |
779 oop oop_Relocation::oop_value() { | |
780 oop v = *oop_addr(); | |
781 // clean inline caches store a special pseudo-null | |
782 if (v == (oop)Universe::non_oop_word()) v = NULL; | |
783 return v; | |
784 } | |
785 | |
786 | |
787 void oop_Relocation::fix_oop_relocation() { | |
788 if (!oop_is_immediate()) { | |
789 // get the oop from the pool, and re-insert it into the instruction: | |
790 set_value(value()); | |
791 } | |
792 } | |
793 | |
794 | |
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795 void oop_Relocation::verify_oop_relocation() { |
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796 if (!oop_is_immediate()) { |
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797 // get the oop from the pool, and re-insert it into the instruction: |
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798 verify_value(value()); |
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799 } |
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800 } |
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801 |
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802 |
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803 RelocIterator virtual_call_Relocation::parse_ic(nmethod* &nm, address &ic_call, address &first_oop, |
0 | 804 oop* &oop_addr, bool *is_optimized) { |
805 assert(ic_call != NULL, "ic_call address must be set"); | |
806 assert(ic_call != NULL || first_oop != NULL, "must supply a non-null input"); | |
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807 if (nm == NULL) { |
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808 CodeBlob* code; |
0 | 809 if (ic_call != NULL) { |
810 code = CodeCache::find_blob(ic_call); | |
811 } else if (first_oop != NULL) { | |
812 code = CodeCache::find_blob(first_oop); | |
813 } | |
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814 nm = code->as_nmethod_or_null(); |
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815 assert(nm != NULL, "address to parse must be in nmethod"); |
0 | 816 } |
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817 assert(ic_call == NULL || nm->contains(ic_call), "must be in nmethod"); |
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818 assert(first_oop == NULL || nm->contains(first_oop), "must be in nmethod"); |
0 | 819 |
820 address oop_limit = NULL; | |
821 | |
822 if (ic_call != NULL) { | |
823 // search for the ic_call at the given address | |
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824 RelocIterator iter(nm, ic_call, ic_call+1); |
0 | 825 bool ret = iter.next(); |
826 assert(ret == true, "relocInfo must exist at this address"); | |
827 assert(iter.addr() == ic_call, "must find ic_call"); | |
828 if (iter.type() == relocInfo::virtual_call_type) { | |
829 virtual_call_Relocation* r = iter.virtual_call_reloc(); | |
830 first_oop = r->first_oop(); | |
831 oop_limit = r->oop_limit(); | |
832 *is_optimized = false; | |
833 } else { | |
834 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); | |
835 *is_optimized = true; | |
836 oop_addr = NULL; | |
837 first_oop = NULL; | |
838 return iter; | |
839 } | |
840 } | |
841 | |
842 // search for the first_oop, to get its oop_addr | |
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843 RelocIterator all_oops(nm, first_oop); |
0 | 844 RelocIterator iter = all_oops; |
845 iter.set_limit(first_oop+1); | |
846 bool found_oop = false; | |
847 while (iter.next()) { | |
848 if (iter.type() == relocInfo::oop_type) { | |
849 assert(iter.addr() == first_oop, "must find first_oop"); | |
850 oop_addr = iter.oop_reloc()->oop_addr(); | |
851 found_oop = true; | |
852 break; | |
853 } | |
854 } | |
855 assert(found_oop, "must find first_oop"); | |
856 | |
857 bool did_reset = false; | |
858 while (ic_call == NULL) { | |
859 // search forward for the ic_call matching the given first_oop | |
860 while (iter.next()) { | |
861 if (iter.type() == relocInfo::virtual_call_type) { | |
862 virtual_call_Relocation* r = iter.virtual_call_reloc(); | |
863 if (r->first_oop() == first_oop) { | |
864 ic_call = r->addr(); | |
865 oop_limit = r->oop_limit(); | |
866 break; | |
867 } | |
868 } | |
869 } | |
870 guarantee(!did_reset, "cannot find ic_call"); | |
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871 iter = RelocIterator(nm); // search the whole nmethod |
0 | 872 did_reset = true; |
873 } | |
874 | |
875 assert(oop_limit != NULL && first_oop != NULL && ic_call != NULL, ""); | |
876 all_oops.set_limit(oop_limit); | |
877 return all_oops; | |
878 } | |
879 | |
880 | |
881 address virtual_call_Relocation::first_oop() { | |
882 assert(_first_oop != NULL && _first_oop < addr(), "must precede ic_call"); | |
883 return _first_oop; | |
884 } | |
885 | |
886 | |
887 address virtual_call_Relocation::oop_limit() { | |
888 if (_oop_limit == NULL) | |
889 return addr() + NativeCall::instruction_size; | |
890 else | |
891 return _oop_limit; | |
892 } | |
893 | |
894 | |
895 | |
896 void virtual_call_Relocation::clear_inline_cache() { | |
897 // No stubs for ICs | |
898 // Clean IC | |
899 ResourceMark rm; | |
900 CompiledIC* icache = CompiledIC_at(this); | |
901 icache->set_to_clean(); | |
902 } | |
903 | |
904 | |
905 void opt_virtual_call_Relocation::clear_inline_cache() { | |
906 // No stubs for ICs | |
907 // Clean IC | |
908 ResourceMark rm; | |
909 CompiledIC* icache = CompiledIC_at(this); | |
910 icache->set_to_clean(); | |
911 } | |
912 | |
913 | |
914 address opt_virtual_call_Relocation::static_stub() { | |
915 // search for the static stub who points back to this static call | |
916 address static_call_addr = addr(); | |
917 RelocIterator iter(code()); | |
918 while (iter.next()) { | |
919 if (iter.type() == relocInfo::static_stub_type) { | |
920 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
921 return iter.addr(); | |
922 } | |
923 } | |
924 } | |
925 return NULL; | |
926 } | |
927 | |
928 | |
929 void static_call_Relocation::clear_inline_cache() { | |
930 // Safe call site info | |
931 CompiledStaticCall* handler = compiledStaticCall_at(this); | |
932 handler->set_to_clean(); | |
933 } | |
934 | |
935 | |
936 address static_call_Relocation::static_stub() { | |
937 // search for the static stub who points back to this static call | |
938 address static_call_addr = addr(); | |
939 RelocIterator iter(code()); | |
940 while (iter.next()) { | |
941 if (iter.type() == relocInfo::static_stub_type) { | |
942 if (iter.static_stub_reloc()->static_call() == static_call_addr) { | |
943 return iter.addr(); | |
944 } | |
945 } | |
946 } | |
947 return NULL; | |
948 } | |
949 | |
950 | |
951 void static_stub_Relocation::clear_inline_cache() { | |
952 // Call stub is only used when calling the interpreted code. | |
953 // It does not really need to be cleared, except that we want to clean out the methodoop. | |
954 CompiledStaticCall::set_stub_to_clean(this); | |
955 } | |
956 | |
957 | |
958 void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
959 address target = _target; | |
960 if (target == NULL) { | |
961 // An absolute embedded reference to an external location, | |
962 // which means there is nothing to fix here. | |
963 return; | |
964 } | |
965 // Probably this reference is absolute, not relative, so the | |
966 // following is probably a no-op. | |
967 assert(src->section_index_of(target) == CodeBuffer::SECT_NONE, "sanity"); | |
968 set_value(target); | |
969 } | |
970 | |
971 | |
972 address external_word_Relocation::target() { | |
973 address target = _target; | |
974 if (target == NULL) { | |
975 target = pd_get_address_from_code(); | |
976 } | |
977 return target; | |
978 } | |
979 | |
980 | |
981 void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) { | |
982 address target = _target; | |
983 if (target == NULL) { | |
984 if (addr_in_const()) { | |
985 target = new_addr_for(*(address*)addr(), src, dest); | |
986 } else { | |
987 target = new_addr_for(pd_get_address_from_code(), src, dest); | |
988 } | |
989 } | |
990 set_value(target); | |
991 } | |
992 | |
993 | |
994 address internal_word_Relocation::target() { | |
995 address target = _target; | |
996 if (target == NULL) { | |
997 target = pd_get_address_from_code(); | |
998 } | |
999 return target; | |
1000 } | |
1001 | |
1002 | |
1003 breakpoint_Relocation::breakpoint_Relocation(int kind, address target, bool internal) { | |
1004 bool active = false; | |
1005 bool enabled = (kind == initialization); | |
1006 bool removable = (kind != safepoint); | |
1007 bool settable = (target == NULL); | |
1008 | |
1009 int bits = kind; | |
1010 if (enabled) bits |= enabled_state; | |
1011 if (internal) bits |= internal_attr; | |
1012 if (removable) bits |= removable_attr; | |
1013 if (settable) bits |= settable_attr; | |
1014 | |
1015 _bits = bits | high_bit; | |
1016 _target = target; | |
1017 | |
1018 assert(this->kind() == kind, "kind encoded"); | |
1019 assert(this->enabled() == enabled, "enabled encoded"); | |
1020 assert(this->active() == active, "active encoded"); | |
1021 assert(this->internal() == internal, "internal encoded"); | |
1022 assert(this->removable() == removable, "removable encoded"); | |
1023 assert(this->settable() == settable, "settable encoded"); | |
1024 } | |
1025 | |
1026 | |
1027 address breakpoint_Relocation::target() const { | |
1028 return _target; | |
1029 } | |
1030 | |
1031 | |
1032 void breakpoint_Relocation::set_target(address x) { | |
1033 assert(settable(), "must be settable"); | |
1034 jint target_bits = | |
1035 (jint)(internal() ? scaled_offset (x, addr()) | |
1036 : runtime_address_to_index(x)); | |
1037 short* p = &live_bits() + 1; | |
1038 p = add_jint(p, target_bits); | |
1039 assert(p == instrs(), "new target must fit"); | |
1040 _target = x; | |
1041 } | |
1042 | |
1043 | |
1044 void breakpoint_Relocation::set_enabled(bool b) { | |
1045 if (enabled() == b) return; | |
1046 | |
1047 if (b) { | |
1048 set_bits(bits() | enabled_state); | |
1049 } else { | |
1050 set_active(false); // remove the actual breakpoint insn, if any | |
1051 set_bits(bits() & ~enabled_state); | |
1052 } | |
1053 } | |
1054 | |
1055 | |
1056 void breakpoint_Relocation::set_active(bool b) { | |
1057 assert(!b || enabled(), "cannot activate a disabled breakpoint"); | |
1058 | |
1059 if (active() == b) return; | |
1060 | |
1061 // %%% should probably seize a lock here (might not be the right lock) | |
1062 //MutexLockerEx ml_patch(Patching_lock, true); | |
1063 //if (active() == b) return; // recheck state after locking | |
1064 | |
1065 if (b) { | |
1066 set_bits(bits() | active_state); | |
1067 if (instrlen() == 0) | |
1068 fatal("breakpoints in original code must be undoable"); | |
1069 pd_swap_in_breakpoint (addr(), instrs(), instrlen()); | |
1070 } else { | |
1071 set_bits(bits() & ~active_state); | |
1072 pd_swap_out_breakpoint(addr(), instrs(), instrlen()); | |
1073 } | |
1074 } | |
1075 | |
1076 | |
1077 //--------------------------------------------------------------------------------- | |
1078 // Non-product code | |
1079 | |
1080 #ifndef PRODUCT | |
1081 | |
1082 static const char* reloc_type_string(relocInfo::relocType t) { | |
1083 switch (t) { | |
1084 #define EACH_CASE(name) \ | |
1085 case relocInfo::name##_type: \ | |
1086 return #name; | |
1087 | |
1088 APPLY_TO_RELOCATIONS(EACH_CASE); | |
1089 #undef EACH_CASE | |
1090 | |
1091 case relocInfo::none: | |
1092 return "none"; | |
1093 case relocInfo::data_prefix_tag: | |
1094 return "prefix"; | |
1095 default: | |
1096 return "UNKNOWN RELOC TYPE"; | |
1097 } | |
1098 } | |
1099 | |
1100 | |
1101 void RelocIterator::print_current() { | |
1102 if (!has_current()) { | |
1103 tty->print_cr("(no relocs)"); | |
1104 return; | |
1105 } | |
2002 | 1106 tty->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT " offset=%d", |
1107 _current, type(), reloc_type_string((relocInfo::relocType) type()), _addr, _current->addr_offset()); | |
0 | 1108 if (current()->format() != 0) |
1109 tty->print(" format=%d", current()->format()); | |
1110 if (datalen() == 1) { | |
1111 tty->print(" data=%d", data()[0]); | |
1112 } else if (datalen() > 0) { | |
1113 tty->print(" data={"); | |
1114 for (int i = 0; i < datalen(); i++) { | |
1115 tty->print("%04x", data()[i] & 0xFFFF); | |
1116 } | |
1117 tty->print("}"); | |
1118 } | |
1119 tty->print("]"); | |
1120 switch (type()) { | |
1121 case relocInfo::oop_type: | |
1122 { | |
1123 oop_Relocation* r = oop_reloc(); | |
1124 oop* oop_addr = NULL; | |
1125 oop raw_oop = NULL; | |
1126 oop oop_value = NULL; | |
1127 if (code() != NULL || r->oop_is_immediate()) { | |
1128 oop_addr = r->oop_addr(); | |
1129 raw_oop = *oop_addr; | |
1130 oop_value = r->oop_value(); | |
1131 } | |
1132 tty->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " offset=%d]", | |
1133 oop_addr, (address)raw_oop, r->offset()); | |
1134 // Do not print the oop by default--we want this routine to | |
1135 // work even during GC or other inconvenient times. | |
1136 if (WizardMode && oop_value != NULL) { | |
1137 tty->print("oop_value=" INTPTR_FORMAT ": ", (address)oop_value); | |
1138 oop_value->print_value_on(tty); | |
1139 } | |
1140 break; | |
1141 } | |
1142 case relocInfo::external_word_type: | |
1143 case relocInfo::internal_word_type: | |
1144 case relocInfo::section_word_type: | |
1145 { | |
1146 DataRelocation* r = (DataRelocation*) reloc(); | |
1147 tty->print(" | [target=" INTPTR_FORMAT "]", r->value()); //value==target | |
1148 break; | |
1149 } | |
1150 case relocInfo::static_call_type: | |
1151 case relocInfo::runtime_call_type: | |
1152 { | |
1153 CallRelocation* r = (CallRelocation*) reloc(); | |
1154 tty->print(" | [destination=" INTPTR_FORMAT "]", r->destination()); | |
1155 break; | |
1156 } | |
1157 case relocInfo::virtual_call_type: | |
1158 { | |
1159 virtual_call_Relocation* r = (virtual_call_Relocation*) reloc(); | |
1160 tty->print(" | [destination=" INTPTR_FORMAT " first_oop=" INTPTR_FORMAT " oop_limit=" INTPTR_FORMAT "]", | |
1161 r->destination(), r->first_oop(), r->oop_limit()); | |
1162 break; | |
1163 } | |
1164 case relocInfo::static_stub_type: | |
1165 { | |
1166 static_stub_Relocation* r = (static_stub_Relocation*) reloc(); | |
1167 tty->print(" | [static_call=" INTPTR_FORMAT "]", r->static_call()); | |
1168 break; | |
1169 } | |
1170 } | |
1171 tty->cr(); | |
1172 } | |
1173 | |
1174 | |
1175 void RelocIterator::print() { | |
1176 RelocIterator save_this = (*this); | |
1177 relocInfo* scan = _current; | |
1178 if (!has_current()) scan += 1; // nothing to scan here! | |
1179 | |
1180 bool skip_next = has_current(); | |
1181 bool got_next; | |
1182 while (true) { | |
1183 got_next = (skip_next || next()); | |
1184 skip_next = false; | |
1185 | |
1186 tty->print(" @" INTPTR_FORMAT ": ", scan); | |
1187 relocInfo* newscan = _current+1; | |
1188 if (!has_current()) newscan -= 1; // nothing to scan here! | |
1189 while (scan < newscan) { | |
1190 tty->print("%04x", *(short*)scan & 0xFFFF); | |
1191 scan++; | |
1192 } | |
1193 tty->cr(); | |
1194 | |
1195 if (!got_next) break; | |
1196 print_current(); | |
1197 } | |
1198 | |
1199 (*this) = save_this; | |
1200 } | |
1201 | |
1202 // For the debugger: | |
1203 extern "C" | |
1563
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1204 void print_blob_locs(nmethod* nm) { |
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1205 nm->print(); |
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1206 RelocIterator iter(nm); |
0 | 1207 iter.print(); |
1208 } | |
1209 extern "C" | |
1210 void print_buf_locs(CodeBuffer* cb) { | |
1211 FlagSetting fs(PrintRelocations, true); | |
1212 cb->print(); | |
1213 } | |
1214 #endif // !PRODUCT |