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annotate src/share/vm/asm/codeBuffer.cpp @ 12888:4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
Reviewed-by: kvn, twisti
author | rbackman |
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date | Fri, 11 Oct 2013 12:06:14 +0200 |
parents | a5de0cc2f91c |
children | b9a918201d47 de6a9e811145 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/codeBuffer.hpp" | |
27 #include "compiler/disassembler.hpp" | |
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28 #include "memory/gcLocker.hpp" |
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29 #include "oops/methodData.hpp" |
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30 #include "oops/oop.inline.hpp" |
1972 | 31 #include "utilities/copy.hpp" |
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32 #include "utilities/xmlstream.hpp" |
0 | 33 |
34 // The structure of a CodeSection: | |
35 // | |
36 // _start -> +----------------+ | |
37 // | machine code...| | |
38 // _end -> |----------------| | |
39 // | | | |
40 // | (empty) | | |
41 // | | | |
42 // | | | |
43 // +----------------+ | |
44 // _limit -> | | | |
45 // | |
46 // _locs_start -> +----------------+ | |
47 // |reloc records...| | |
48 // |----------------| | |
49 // _locs_end -> | | | |
50 // | | | |
51 // | (empty) | | |
52 // | | | |
53 // | | | |
54 // +----------------+ | |
55 // _locs_limit -> | | | |
56 // The _end (resp. _limit) pointer refers to the first | |
57 // unused (resp. unallocated) byte. | |
58 | |
59 // The structure of the CodeBuffer while code is being accumulated: | |
60 // | |
61 // _total_start -> \ | |
62 // _insts._start -> +----------------+ | |
63 // | | | |
64 // | Code | | |
65 // | | | |
66 // _stubs._start -> |----------------| | |
67 // | | | |
68 // | Stubs | (also handlers for deopt/exception) | |
69 // | | | |
70 // _consts._start -> |----------------| | |
71 // | | | |
72 // | Constants | | |
73 // | | | |
74 // +----------------+ | |
75 // + _total_size -> | | | |
76 // | |
77 // When the code and relocations are copied to the code cache, | |
78 // the empty parts of each section are removed, and everything | |
79 // is copied into contiguous locations. | |
80 | |
81 typedef CodeBuffer::csize_t csize_t; // file-local definition | |
82 | |
1748 | 83 // External buffer, in a predefined CodeBlob. |
0 | 84 // Important: The code_start must be taken exactly, and not realigned. |
1748 | 85 CodeBuffer::CodeBuffer(CodeBlob* blob) { |
0 | 86 initialize_misc("static buffer"); |
1748 | 87 initialize(blob->content_begin(), blob->content_size()); |
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88 verify_section_allocation(); |
0 | 89 } |
90 | |
91 void CodeBuffer::initialize(csize_t code_size, csize_t locs_size) { | |
92 // Compute maximal alignment. | |
93 int align = _insts.alignment(); | |
94 // Always allow for empty slop around each section. | |
95 int slop = (int) CodeSection::end_slop(); | |
96 | |
97 assert(blob() == NULL, "only once"); | |
98 set_blob(BufferBlob::create(_name, code_size + (align+slop) * (SECT_LIMIT+1))); | |
99 if (blob() == NULL) { | |
100 // The assembler constructor will throw a fatal on an empty CodeBuffer. | |
101 return; // caller must test this | |
102 } | |
103 | |
104 // Set up various pointers into the blob. | |
105 initialize(_total_start, _total_size); | |
106 | |
1748 | 107 assert((uintptr_t)insts_begin() % CodeEntryAlignment == 0, "instruction start not code entry aligned"); |
0 | 108 |
109 pd_initialize(); | |
110 | |
111 if (locs_size != 0) { | |
112 _insts.initialize_locs(locs_size / sizeof(relocInfo)); | |
113 } | |
114 | |
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115 verify_section_allocation(); |
0 | 116 } |
117 | |
118 | |
119 CodeBuffer::~CodeBuffer() { | |
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120 verify_section_allocation(); |
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121 |
0 | 122 // If we allocate our code buffer from the CodeCache |
123 // via a BufferBlob, and it's not permanent, then | |
124 // free the BufferBlob. | |
125 // The rest of the memory will be freed when the ResourceObj | |
126 // is released. | |
127 for (CodeBuffer* cb = this; cb != NULL; cb = cb->before_expand()) { | |
128 // Previous incarnations of this buffer are held live, so that internal | |
129 // addresses constructed before expansions will not be confused. | |
130 cb->free_blob(); | |
131 } | |
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132 |
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133 // free any overflow storage |
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134 delete _overflow_arena; |
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135 |
0 | 136 #ifdef ASSERT |
1685 | 137 // Save allocation type to execute assert in ~ResourceObj() |
138 // which is called after this destructor. | |
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139 assert(_default_oop_recorder.allocated_on_stack(), "should be embedded object"); |
1685 | 140 ResourceObj::allocation_type at = _default_oop_recorder.get_allocation_type(); |
0 | 141 Copy::fill_to_bytes(this, sizeof(*this), badResourceValue); |
1685 | 142 ResourceObj::set_allocation_type((address)(&_default_oop_recorder), at); |
0 | 143 #endif |
144 } | |
145 | |
146 void CodeBuffer::initialize_oop_recorder(OopRecorder* r) { | |
147 assert(_oop_recorder == &_default_oop_recorder && _default_oop_recorder.is_unused(), "do this once"); | |
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148 DEBUG_ONLY(_default_oop_recorder.freeze()); // force unused OR to be frozen |
0 | 149 _oop_recorder = r; |
150 } | |
151 | |
152 void CodeBuffer::initialize_section_size(CodeSection* cs, csize_t size) { | |
153 assert(cs != &_insts, "insts is the memory provider, not the consumer"); | |
154 csize_t slop = CodeSection::end_slop(); // margin between sections | |
155 int align = cs->alignment(); | |
156 assert(is_power_of_2(align), "sanity"); | |
157 address start = _insts._start; | |
158 address limit = _insts._limit; | |
159 address middle = limit - size; | |
160 middle -= (intptr_t)middle & (align-1); // align the division point downward | |
161 guarantee(middle - slop > start, "need enough space to divide up"); | |
162 _insts._limit = middle - slop; // subtract desired space, plus slop | |
163 cs->initialize(middle, limit - middle); | |
164 assert(cs->start() == middle, "sanity"); | |
165 assert(cs->limit() == limit, "sanity"); | |
166 // give it some relocations to start with, if the main section has them | |
167 if (_insts.has_locs()) cs->initialize_locs(1); | |
168 } | |
169 | |
170 void CodeBuffer::freeze_section(CodeSection* cs) { | |
171 CodeSection* next_cs = (cs == consts())? NULL: code_section(cs->index()+1); | |
172 csize_t frozen_size = cs->size(); | |
173 if (next_cs != NULL) { | |
174 frozen_size = next_cs->align_at_start(frozen_size); | |
175 } | |
176 address old_limit = cs->limit(); | |
177 address new_limit = cs->start() + frozen_size; | |
178 relocInfo* old_locs_limit = cs->locs_limit(); | |
179 relocInfo* new_locs_limit = cs->locs_end(); | |
180 // Patch the limits. | |
181 cs->_limit = new_limit; | |
182 cs->_locs_limit = new_locs_limit; | |
183 cs->_frozen = true; | |
184 if (!next_cs->is_allocated() && !next_cs->is_frozen()) { | |
185 // Give remaining buffer space to the following section. | |
186 next_cs->initialize(new_limit, old_limit - new_limit); | |
187 next_cs->initialize_shared_locs(new_locs_limit, | |
188 old_locs_limit - new_locs_limit); | |
189 } | |
190 } | |
191 | |
192 void CodeBuffer::set_blob(BufferBlob* blob) { | |
193 _blob = blob; | |
194 if (blob != NULL) { | |
1748 | 195 address start = blob->content_begin(); |
196 address end = blob->content_end(); | |
0 | 197 // Round up the starting address. |
198 int align = _insts.alignment(); | |
199 start += (-(intptr_t)start) & (align-1); | |
200 _total_start = start; | |
201 _total_size = end - start; | |
202 } else { | |
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203 #ifdef ASSERT |
0 | 204 // Clean out dangling pointers. |
205 _total_start = badAddress; | |
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206 _consts._start = _consts._end = badAddress; |
0 | 207 _insts._start = _insts._end = badAddress; |
208 _stubs._start = _stubs._end = badAddress; | |
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209 #endif //ASSERT |
0 | 210 } |
211 } | |
212 | |
213 void CodeBuffer::free_blob() { | |
214 if (_blob != NULL) { | |
215 BufferBlob::free(_blob); | |
216 set_blob(NULL); | |
217 } | |
218 } | |
219 | |
220 const char* CodeBuffer::code_section_name(int n) { | |
221 #ifdef PRODUCT | |
222 return NULL; | |
223 #else //PRODUCT | |
224 switch (n) { | |
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225 case SECT_CONSTS: return "consts"; |
0 | 226 case SECT_INSTS: return "insts"; |
227 case SECT_STUBS: return "stubs"; | |
228 default: return NULL; | |
229 } | |
230 #endif //PRODUCT | |
231 } | |
232 | |
233 int CodeBuffer::section_index_of(address addr) const { | |
234 for (int n = 0; n < (int)SECT_LIMIT; n++) { | |
235 const CodeSection* cs = code_section(n); | |
236 if (cs->allocates(addr)) return n; | |
237 } | |
238 return SECT_NONE; | |
239 } | |
240 | |
241 int CodeBuffer::locator(address addr) const { | |
242 for (int n = 0; n < (int)SECT_LIMIT; n++) { | |
243 const CodeSection* cs = code_section(n); | |
244 if (cs->allocates(addr)) { | |
245 return locator(addr - cs->start(), n); | |
246 } | |
247 } | |
248 return -1; | |
249 } | |
250 | |
251 address CodeBuffer::locator_address(int locator) const { | |
252 if (locator < 0) return NULL; | |
253 address start = code_section(locator_sect(locator))->start(); | |
254 return start + locator_pos(locator); | |
255 } | |
256 | |
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257 bool CodeBuffer::is_backward_branch(Label& L) { |
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258 return L.is_bound() && insts_end() <= locator_address(L.loc()); |
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259 } |
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260 |
0 | 261 address CodeBuffer::decode_begin() { |
262 address begin = _insts.start(); | |
263 if (_decode_begin != NULL && _decode_begin > begin) | |
264 begin = _decode_begin; | |
265 return begin; | |
266 } | |
267 | |
268 | |
269 GrowableArray<int>* CodeBuffer::create_patch_overflow() { | |
270 if (_overflow_arena == NULL) { | |
6197 | 271 _overflow_arena = new (mtCode) Arena(); |
0 | 272 } |
273 return new (_overflow_arena) GrowableArray<int>(_overflow_arena, 8, 0, 0); | |
274 } | |
275 | |
276 | |
277 // Helper function for managing labels and their target addresses. | |
278 // Returns a sensible address, and if it is not the label's final | |
279 // address, notes the dependency (at 'branch_pc') on the label. | |
280 address CodeSection::target(Label& L, address branch_pc) { | |
281 if (L.is_bound()) { | |
282 int loc = L.loc(); | |
283 if (index() == CodeBuffer::locator_sect(loc)) { | |
284 return start() + CodeBuffer::locator_pos(loc); | |
285 } else { | |
286 return outer()->locator_address(loc); | |
287 } | |
288 } else { | |
289 assert(allocates2(branch_pc), "sanity"); | |
290 address base = start(); | |
291 int patch_loc = CodeBuffer::locator(branch_pc - base, index()); | |
292 L.add_patch_at(outer(), patch_loc); | |
293 | |
294 // Need to return a pc, doesn't matter what it is since it will be | |
295 // replaced during resolution later. | |
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296 // Don't return NULL or badAddress, since branches shouldn't overflow. |
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297 // Don't return base either because that could overflow displacements |
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298 // for shorter branches. It will get checked when bound. |
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299 return branch_pc; |
0 | 300 } |
301 } | |
302 | |
303 void CodeSection::relocate(address at, RelocationHolder const& spec, int format) { | |
304 Relocation* reloc = spec.reloc(); | |
305 relocInfo::relocType rtype = (relocInfo::relocType) reloc->type(); | |
306 if (rtype == relocInfo::none) return; | |
307 | |
308 // The assertion below has been adjusted, to also work for | |
309 // relocation for fixup. Sometimes we want to put relocation | |
310 // information for the next instruction, since it will be patched | |
311 // with a call. | |
312 assert(start() <= at && at <= end()+1, | |
313 "cannot relocate data outside code boundaries"); | |
314 | |
315 if (!has_locs()) { | |
316 // no space for relocation information provided => code cannot be | |
317 // relocated. Make sure that relocate is only called with rtypes | |
318 // that can be ignored for this kind of code. | |
319 assert(rtype == relocInfo::none || | |
320 rtype == relocInfo::runtime_call_type || | |
321 rtype == relocInfo::internal_word_type|| | |
322 rtype == relocInfo::section_word_type || | |
323 rtype == relocInfo::external_word_type, | |
324 "code needs relocation information"); | |
325 // leave behind an indication that we attempted a relocation | |
326 DEBUG_ONLY(_locs_start = _locs_limit = (relocInfo*)badAddress); | |
327 return; | |
328 } | |
329 | |
330 // Advance the point, noting the offset we'll have to record. | |
331 csize_t offset = at - locs_point(); | |
332 set_locs_point(at); | |
333 | |
334 // Test for a couple of overflow conditions; maybe expand the buffer. | |
335 relocInfo* end = locs_end(); | |
336 relocInfo* req = end + relocInfo::length_limit; | |
337 // Check for (potential) overflow | |
338 if (req >= locs_limit() || offset >= relocInfo::offset_limit()) { | |
339 req += (uint)offset / (uint)relocInfo::offset_limit(); | |
340 if (req >= locs_limit()) { | |
341 // Allocate or reallocate. | |
342 expand_locs(locs_count() + (req - end)); | |
343 // reload pointer | |
344 end = locs_end(); | |
345 } | |
346 } | |
347 | |
348 // If the offset is giant, emit filler relocs, of type 'none', but | |
349 // each carrying the largest possible offset, to advance the locs_point. | |
350 while (offset >= relocInfo::offset_limit()) { | |
351 assert(end < locs_limit(), "adjust previous paragraph of code"); | |
352 *end++ = filler_relocInfo(); | |
353 offset -= filler_relocInfo().addr_offset(); | |
354 } | |
355 | |
356 // If it's a simple reloc with no data, we'll just write (rtype | offset). | |
357 (*end) = relocInfo(rtype, offset, format); | |
358 | |
359 // If it has data, insert the prefix, as (data_prefix_tag | data1), data2. | |
360 end->initialize(this, reloc); | |
361 } | |
362 | |
363 void CodeSection::initialize_locs(int locs_capacity) { | |
364 assert(_locs_start == NULL, "only one locs init step, please"); | |
365 // Apply a priori lower limits to relocation size: | |
366 csize_t min_locs = MAX2(size() / 16, (csize_t)4); | |
367 if (locs_capacity < min_locs) locs_capacity = min_locs; | |
368 relocInfo* locs_start = NEW_RESOURCE_ARRAY(relocInfo, locs_capacity); | |
369 _locs_start = locs_start; | |
370 _locs_end = locs_start; | |
371 _locs_limit = locs_start + locs_capacity; | |
372 _locs_own = true; | |
373 } | |
374 | |
375 void CodeSection::initialize_shared_locs(relocInfo* buf, int length) { | |
376 assert(_locs_start == NULL, "do this before locs are allocated"); | |
377 // Internal invariant: locs buf must be fully aligned. | |
378 // See copy_relocations_to() below. | |
379 while ((uintptr_t)buf % HeapWordSize != 0 && length > 0) { | |
380 ++buf; --length; | |
381 } | |
382 if (length > 0) { | |
383 _locs_start = buf; | |
384 _locs_end = buf; | |
385 _locs_limit = buf + length; | |
386 _locs_own = false; | |
387 } | |
388 } | |
389 | |
390 void CodeSection::initialize_locs_from(const CodeSection* source_cs) { | |
391 int lcount = source_cs->locs_count(); | |
392 if (lcount != 0) { | |
393 initialize_shared_locs(source_cs->locs_start(), lcount); | |
394 _locs_end = _locs_limit = _locs_start + lcount; | |
395 assert(is_allocated(), "must have copied code already"); | |
396 set_locs_point(start() + source_cs->locs_point_off()); | |
397 } | |
398 assert(this->locs_count() == source_cs->locs_count(), "sanity"); | |
399 } | |
400 | |
401 void CodeSection::expand_locs(int new_capacity) { | |
402 if (_locs_start == NULL) { | |
403 initialize_locs(new_capacity); | |
404 return; | |
405 } else { | |
406 int old_count = locs_count(); | |
407 int old_capacity = locs_capacity(); | |
408 if (new_capacity < old_capacity * 2) | |
409 new_capacity = old_capacity * 2; | |
410 relocInfo* locs_start; | |
411 if (_locs_own) { | |
412 locs_start = REALLOC_RESOURCE_ARRAY(relocInfo, _locs_start, old_capacity, new_capacity); | |
413 } else { | |
414 locs_start = NEW_RESOURCE_ARRAY(relocInfo, new_capacity); | |
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415 Copy::conjoint_jbytes(_locs_start, locs_start, old_capacity * sizeof(relocInfo)); |
0 | 416 _locs_own = true; |
417 } | |
418 _locs_start = locs_start; | |
419 _locs_end = locs_start + old_count; | |
420 _locs_limit = locs_start + new_capacity; | |
421 } | |
422 } | |
423 | |
424 | |
425 /// Support for emitting the code to its final location. | |
426 /// The pattern is the same for all functions. | |
427 /// We iterate over all the sections, padding each to alignment. | |
428 | |
1748 | 429 csize_t CodeBuffer::total_content_size() const { |
430 csize_t size_so_far = 0; | |
0 | 431 for (int n = 0; n < (int)SECT_LIMIT; n++) { |
432 const CodeSection* cs = code_section(n); | |
433 if (cs->is_empty()) continue; // skip trivial section | |
1748 | 434 size_so_far = cs->align_at_start(size_so_far); |
435 size_so_far += cs->size(); | |
0 | 436 } |
1748 | 437 return size_so_far; |
0 | 438 } |
439 | |
440 void CodeBuffer::compute_final_layout(CodeBuffer* dest) const { | |
441 address buf = dest->_total_start; | |
442 csize_t buf_offset = 0; | |
1748 | 443 assert(dest->_total_size >= total_content_size(), "must be big enough"); |
0 | 444 |
445 { | |
446 // not sure why this is here, but why not... | |
447 int alignSize = MAX2((intx) sizeof(jdouble), CodeEntryAlignment); | |
448 assert( (dest->_total_start - _insts.start()) % alignSize == 0, "copy must preserve alignment"); | |
449 } | |
450 | |
451 const CodeSection* prev_cs = NULL; | |
452 CodeSection* prev_dest_cs = NULL; | |
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453 |
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454 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) { |
0 | 455 // figure compact layout of each section |
456 const CodeSection* cs = code_section(n); | |
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457 csize_t csize = cs->size(); |
0 | 458 |
459 CodeSection* dest_cs = dest->code_section(n); | |
460 if (!cs->is_empty()) { | |
461 // Compute initial padding; assign it to the previous non-empty guy. | |
462 // Cf. figure_expanded_capacities. | |
463 csize_t padding = cs->align_at_start(buf_offset) - buf_offset; | |
464 if (padding != 0) { | |
465 buf_offset += padding; | |
466 assert(prev_dest_cs != NULL, "sanity"); | |
467 prev_dest_cs->_limit += padding; | |
468 } | |
469 #ifdef ASSERT | |
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470 if (prev_cs != NULL && prev_cs->is_frozen() && n < (SECT_LIMIT - 1)) { |
0 | 471 // Make sure the ends still match up. |
472 // This is important because a branch in a frozen section | |
473 // might target code in a following section, via a Label, | |
474 // and without a relocation record. See Label::patch_instructions. | |
475 address dest_start = buf+buf_offset; | |
476 csize_t start2start = cs->start() - prev_cs->start(); | |
477 csize_t dest_start2start = dest_start - prev_dest_cs->start(); | |
478 assert(start2start == dest_start2start, "cannot stretch frozen sect"); | |
479 } | |
480 #endif //ASSERT | |
481 prev_dest_cs = dest_cs; | |
482 prev_cs = cs; | |
483 } | |
484 | |
485 debug_only(dest_cs->_start = NULL); // defeat double-initialization assert | |
486 dest_cs->initialize(buf+buf_offset, csize); | |
487 dest_cs->set_end(buf+buf_offset+csize); | |
488 assert(dest_cs->is_allocated(), "must always be allocated"); | |
489 assert(cs->is_empty() == dest_cs->is_empty(), "sanity"); | |
490 | |
491 buf_offset += csize; | |
492 } | |
493 | |
494 // Done calculating sections; did it come out to the right end? | |
1748 | 495 assert(buf_offset == total_content_size(), "sanity"); |
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496 dest->verify_section_allocation(); |
0 | 497 } |
498 | |
7409 | 499 // Append an oop reference that keeps the class alive. |
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500 static void append_oop_references(GrowableArray<oop>* oops, Klass* k) { |
7409 | 501 oop cl = k->klass_holder(); |
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502 if (cl != NULL && !oops->contains(cl)) { |
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503 oops->append(cl); |
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504 } |
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505 } |
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506 |
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507 void CodeBuffer::finalize_oop_references(methodHandle mh) { |
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508 No_Safepoint_Verifier nsv; |
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509 |
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510 GrowableArray<oop> oops; |
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511 |
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512 // Make sure that immediate metadata records something in the OopRecorder |
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513 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) { |
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514 // pull code out of each section |
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515 CodeSection* cs = code_section(n); |
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516 if (cs->is_empty()) continue; // skip trivial section |
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517 RelocIterator iter(cs); |
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518 while (iter.next()) { |
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519 if (iter.type() == relocInfo::metadata_type) { |
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520 metadata_Relocation* md = iter.metadata_reloc(); |
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521 if (md->metadata_is_immediate()) { |
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522 Metadata* m = md->metadata_value(); |
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523 if (oop_recorder()->is_real(m)) { |
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524 if (m->is_methodData()) { |
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525 m = ((MethodData*)m)->method(); |
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526 } |
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527 if (m->is_method()) { |
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528 m = ((Method*)m)->method_holder(); |
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529 } |
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530 if (m->is_klass()) { |
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531 append_oop_references(&oops, (Klass*)m); |
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532 } else { |
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533 // XXX This will currently occur for MDO which don't |
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534 // have a backpointer. This has to be fixed later. |
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535 m->print(); |
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536 ShouldNotReachHere(); |
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537 } |
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538 } |
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539 } |
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540 } |
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541 } |
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542 } |
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543 |
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544 if (!oop_recorder()->is_unused()) { |
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545 for (int i = 0; i < oop_recorder()->metadata_count(); i++) { |
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546 Metadata* m = oop_recorder()->metadata_at(i); |
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547 if (oop_recorder()->is_real(m)) { |
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548 if (m->is_methodData()) { |
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549 m = ((MethodData*)m)->method(); |
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550 } |
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551 if (m->is_method()) { |
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552 m = ((Method*)m)->method_holder(); |
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553 } |
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554 if (m->is_klass()) { |
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555 append_oop_references(&oops, (Klass*)m); |
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556 } else { |
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557 m->print(); |
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558 ShouldNotReachHere(); |
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559 } |
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560 } |
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561 } |
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562 |
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563 } |
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564 |
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565 // Add the class loader of Method* for the nmethod itself |
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566 append_oop_references(&oops, mh->method_holder()); |
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567 |
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568 // Add any oops that we've found |
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569 Thread* thread = Thread::current(); |
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570 for (int i = 0; i < oops.length(); i++) { |
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571 oop_recorder()->find_index((jobject)thread->handle_area()->allocate_handle(oops.at(i))); |
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572 } |
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573 } |
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574 |
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575 |
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576 |
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577 csize_t CodeBuffer::total_offset_of(CodeSection* cs) const { |
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578 csize_t size_so_far = 0; |
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579 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) { |
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580 const CodeSection* cur_cs = code_section(n); |
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581 if (!cur_cs->is_empty()) { |
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582 size_so_far = cur_cs->align_at_start(size_so_far); |
0 | 583 } |
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584 if (cur_cs->index() == cs->index()) { |
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585 return size_so_far; |
0 | 586 } |
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587 size_so_far += cur_cs->size(); |
0 | 588 } |
589 ShouldNotReachHere(); | |
590 return -1; | |
591 } | |
592 | |
593 csize_t CodeBuffer::total_relocation_size() const { | |
594 csize_t lsize = copy_relocations_to(NULL); // dry run only | |
1748 | 595 csize_t csize = total_content_size(); |
0 | 596 csize_t total = RelocIterator::locs_and_index_size(csize, lsize); |
597 return (csize_t) align_size_up(total, HeapWordSize); | |
598 } | |
599 | |
600 csize_t CodeBuffer::copy_relocations_to(CodeBlob* dest) const { | |
601 address buf = NULL; | |
602 csize_t buf_offset = 0; | |
603 csize_t buf_limit = 0; | |
604 if (dest != NULL) { | |
605 buf = (address)dest->relocation_begin(); | |
606 buf_limit = (address)dest->relocation_end() - buf; | |
607 assert((uintptr_t)buf % HeapWordSize == 0, "buf must be fully aligned"); | |
608 assert(buf_limit % HeapWordSize == 0, "buf must be evenly sized"); | |
609 } | |
610 // if dest == NULL, this is just the sizing pass | |
611 | |
612 csize_t code_end_so_far = 0; | |
613 csize_t code_point_so_far = 0; | |
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614 for (int n = (int) SECT_FIRST; n < (int)SECT_LIMIT; n++) { |
0 | 615 // pull relocs out of each section |
616 const CodeSection* cs = code_section(n); | |
617 assert(!(cs->is_empty() && cs->locs_count() > 0), "sanity"); | |
618 if (cs->is_empty()) continue; // skip trivial section | |
619 relocInfo* lstart = cs->locs_start(); | |
620 relocInfo* lend = cs->locs_end(); | |
621 csize_t lsize = (csize_t)( (address)lend - (address)lstart ); | |
622 csize_t csize = cs->size(); | |
623 code_end_so_far = cs->align_at_start(code_end_so_far); | |
624 | |
625 if (lsize > 0) { | |
626 // Figure out how to advance the combined relocation point | |
627 // first to the beginning of this section. | |
628 // We'll insert one or more filler relocs to span that gap. | |
629 // (Don't bother to improve this by editing the first reloc's offset.) | |
630 csize_t new_code_point = code_end_so_far; | |
631 for (csize_t jump; | |
632 code_point_so_far < new_code_point; | |
633 code_point_so_far += jump) { | |
634 jump = new_code_point - code_point_so_far; | |
635 relocInfo filler = filler_relocInfo(); | |
636 if (jump >= filler.addr_offset()) { | |
637 jump = filler.addr_offset(); | |
638 } else { // else shrink the filler to fit | |
639 filler = relocInfo(relocInfo::none, jump); | |
640 } | |
641 if (buf != NULL) { | |
642 assert(buf_offset + (csize_t)sizeof(filler) <= buf_limit, "filler in bounds"); | |
643 *(relocInfo*)(buf+buf_offset) = filler; | |
644 } | |
645 buf_offset += sizeof(filler); | |
646 } | |
647 | |
648 // Update code point and end to skip past this section: | |
649 csize_t last_code_point = code_end_so_far + cs->locs_point_off(); | |
650 assert(code_point_so_far <= last_code_point, "sanity"); | |
651 code_point_so_far = last_code_point; // advance past this guy's relocs | |
652 } | |
653 code_end_so_far += csize; // advance past this guy's instructions too | |
654 | |
655 // Done with filler; emit the real relocations: | |
656 if (buf != NULL && lsize != 0) { | |
657 assert(buf_offset + lsize <= buf_limit, "target in bounds"); | |
658 assert((uintptr_t)lstart % HeapWordSize == 0, "sane start"); | |
659 if (buf_offset % HeapWordSize == 0) { | |
660 // Use wordwise copies if possible: | |
661 Copy::disjoint_words((HeapWord*)lstart, | |
662 (HeapWord*)(buf+buf_offset), | |
663 (lsize + HeapWordSize-1) / HeapWordSize); | |
664 } else { | |
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665 Copy::conjoint_jbytes(lstart, buf+buf_offset, lsize); |
0 | 666 } |
667 } | |
668 buf_offset += lsize; | |
669 } | |
670 | |
671 // Align end of relocation info in target. | |
672 while (buf_offset % HeapWordSize != 0) { | |
673 if (buf != NULL) { | |
674 relocInfo padding = relocInfo(relocInfo::none, 0); | |
675 assert(buf_offset + (csize_t)sizeof(padding) <= buf_limit, "padding in bounds"); | |
676 *(relocInfo*)(buf+buf_offset) = padding; | |
677 } | |
678 buf_offset += sizeof(relocInfo); | |
679 } | |
680 | |
1748 | 681 assert(code_end_so_far == total_content_size(), "sanity"); |
0 | 682 |
683 // Account for index: | |
684 if (buf != NULL) { | |
685 RelocIterator::create_index(dest->relocation_begin(), | |
686 buf_offset / sizeof(relocInfo), | |
687 dest->relocation_end()); | |
688 } | |
689 | |
690 return buf_offset; | |
691 } | |
692 | |
693 void CodeBuffer::copy_code_to(CodeBlob* dest_blob) { | |
694 #ifndef PRODUCT | |
695 if (PrintNMethods && (WizardMode || Verbose)) { | |
696 tty->print("done with CodeBuffer:"); | |
697 ((CodeBuffer*)this)->print(); | |
698 } | |
699 #endif //PRODUCT | |
700 | |
1748 | 701 CodeBuffer dest(dest_blob); |
702 assert(dest_blob->content_size() >= total_content_size(), "good sizing"); | |
0 | 703 this->compute_final_layout(&dest); |
704 relocate_code_to(&dest); | |
705 | |
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706 // transfer strings and comments from buffer to blob |
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707 dest_blob->set_strings(_strings); |
0 | 708 |
709 // Done moving code bytes; were they the right size? | |
1748 | 710 assert(round_to(dest.total_content_size(), oopSize) == dest_blob->content_size(), "sanity"); |
0 | 711 |
712 // Flush generated code | |
1748 | 713 ICache::invalidate_range(dest_blob->code_begin(), dest_blob->code_size()); |
0 | 714 } |
715 | |
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716 // Move all my code into another code buffer. Consult applicable |
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717 // relocs to repair embedded addresses. The layout in the destination |
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718 // CodeBuffer is different to the source CodeBuffer: the destination |
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719 // CodeBuffer gets the final layout (consts, insts, stubs in order of |
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720 // ascending address). |
0 | 721 void CodeBuffer::relocate_code_to(CodeBuffer* dest) const { |
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722 address dest_end = dest->_total_start + dest->_total_size; |
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723 address dest_filled = NULL; |
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724 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) { |
0 | 725 // pull code out of each section |
726 const CodeSection* cs = code_section(n); | |
727 if (cs->is_empty()) continue; // skip trivial section | |
728 CodeSection* dest_cs = dest->code_section(n); | |
729 assert(cs->size() == dest_cs->size(), "sanity"); | |
730 csize_t usize = dest_cs->size(); | |
731 csize_t wsize = align_size_up(usize, HeapWordSize); | |
732 assert(dest_cs->start() + wsize <= dest_end, "no overflow"); | |
733 // Copy the code as aligned machine words. | |
734 // This may also include an uninitialized partial word at the end. | |
735 Copy::disjoint_words((HeapWord*)cs->start(), | |
736 (HeapWord*)dest_cs->start(), | |
737 wsize / HeapWordSize); | |
738 | |
739 if (dest->blob() == NULL) { | |
740 // Destination is a final resting place, not just another buffer. | |
741 // Normalize uninitialized bytes in the final padding. | |
742 Copy::fill_to_bytes(dest_cs->end(), dest_cs->remaining(), | |
743 Assembler::code_fill_byte()); | |
744 } | |
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745 // Keep track of the highest filled address |
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746 dest_filled = MAX2(dest_filled, dest_cs->end() + dest_cs->remaining()); |
0 | 747 |
748 assert(cs->locs_start() != (relocInfo*)badAddress, | |
749 "this section carries no reloc storage, but reloc was attempted"); | |
750 | |
751 // Make the new code copy use the old copy's relocations: | |
752 dest_cs->initialize_locs_from(cs); | |
7197 | 753 } |
0 | 754 |
7197 | 755 // Do relocation after all sections are copied. |
756 // This is necessary if the code uses constants in stubs, which are | |
757 // relocated when the corresponding instruction in the code (e.g., a | |
758 // call) is relocated. Stubs are placed behind the main code | |
759 // section, so that section has to be copied before relocating. | |
760 for (int n = (int) SECT_FIRST; n < (int)SECT_LIMIT; n++) { | |
761 // pull code out of each section | |
762 const CodeSection* cs = code_section(n); | |
763 if (cs->is_empty()) continue; // skip trivial section | |
764 CodeSection* dest_cs = dest->code_section(n); | |
0 | 765 { // Repair the pc relative information in the code after the move |
766 RelocIterator iter(dest_cs); | |
767 while (iter.next()) { | |
768 iter.reloc()->fix_relocation_after_move(this, dest); | |
769 } | |
770 } | |
771 } | |
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772 |
6926 | 773 if (dest->blob() == NULL && dest_filled != NULL) { |
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774 // Destination is a final resting place, not just another buffer. |
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775 // Normalize uninitialized bytes in the final padding. |
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776 Copy::fill_to_bytes(dest_filled, dest_end - dest_filled, |
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777 Assembler::code_fill_byte()); |
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778 |
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779 } |
0 | 780 } |
781 | |
782 csize_t CodeBuffer::figure_expanded_capacities(CodeSection* which_cs, | |
783 csize_t amount, | |
784 csize_t* new_capacity) { | |
785 csize_t new_total_cap = 0; | |
786 | |
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787 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) { |
0 | 788 const CodeSection* sect = code_section(n); |
789 | |
790 if (!sect->is_empty()) { | |
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791 // Compute initial padding; assign it to the previous section, |
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792 // even if it's empty (e.g. consts section can be empty). |
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793 // Cf. compute_final_layout |
0 | 794 csize_t padding = sect->align_at_start(new_total_cap) - new_total_cap; |
795 if (padding != 0) { | |
796 new_total_cap += padding; | |
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797 assert(n - 1 >= SECT_FIRST, "sanity"); |
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798 new_capacity[n - 1] += padding; |
0 | 799 } |
800 } | |
801 | |
802 csize_t exp = sect->size(); // 100% increase | |
803 if ((uint)exp < 4*K) exp = 4*K; // minimum initial increase | |
804 if (sect == which_cs) { | |
805 if (exp < amount) exp = amount; | |
806 if (StressCodeBuffers) exp = amount; // expand only slightly | |
807 } else if (n == SECT_INSTS) { | |
808 // scale down inst increases to a more modest 25% | |
809 exp = 4*K + ((exp - 4*K) >> 2); | |
810 if (StressCodeBuffers) exp = amount / 2; // expand only slightly | |
811 } else if (sect->is_empty()) { | |
812 // do not grow an empty secondary section | |
813 exp = 0; | |
814 } | |
815 // Allow for inter-section slop: | |
816 exp += CodeSection::end_slop(); | |
817 csize_t new_cap = sect->size() + exp; | |
818 if (new_cap < sect->capacity()) { | |
819 // No need to expand after all. | |
820 new_cap = sect->capacity(); | |
821 } | |
822 new_capacity[n] = new_cap; | |
823 new_total_cap += new_cap; | |
824 } | |
825 | |
826 return new_total_cap; | |
827 } | |
828 | |
829 void CodeBuffer::expand(CodeSection* which_cs, csize_t amount) { | |
830 #ifndef PRODUCT | |
831 if (PrintNMethods && (WizardMode || Verbose)) { | |
832 tty->print("expanding CodeBuffer:"); | |
833 this->print(); | |
834 } | |
835 | |
836 if (StressCodeBuffers && blob() != NULL) { | |
837 static int expand_count = 0; | |
838 if (expand_count >= 0) expand_count += 1; | |
839 if (expand_count > 100 && is_power_of_2(expand_count)) { | |
840 tty->print_cr("StressCodeBuffers: have expanded %d times", expand_count); | |
841 // simulate an occasional allocation failure: | |
842 free_blob(); | |
843 } | |
844 } | |
845 #endif //PRODUCT | |
846 | |
847 // Resizing must be allowed | |
848 { | |
849 if (blob() == NULL) return; // caller must check for blob == NULL | |
850 for (int n = 0; n < (int)SECT_LIMIT; n++) { | |
851 guarantee(!code_section(n)->is_frozen(), "resizing not allowed when frozen"); | |
852 } | |
853 } | |
854 | |
855 // Figure new capacity for each section. | |
856 csize_t new_capacity[SECT_LIMIT]; | |
857 csize_t new_total_cap | |
858 = figure_expanded_capacities(which_cs, amount, new_capacity); | |
859 | |
860 // Create a new (temporary) code buffer to hold all the new data | |
861 CodeBuffer cb(name(), new_total_cap, 0); | |
862 if (cb.blob() == NULL) { | |
863 // Failed to allocate in code cache. | |
864 free_blob(); | |
865 return; | |
866 } | |
867 | |
868 // Create an old code buffer to remember which addresses used to go where. | |
869 // This will be useful when we do final assembly into the code cache, | |
870 // because we will need to know how to warp any internal address that | |
871 // has been created at any time in this CodeBuffer's past. | |
872 CodeBuffer* bxp = new CodeBuffer(_total_start, _total_size); | |
873 bxp->take_over_code_from(this); // remember the old undersized blob | |
874 DEBUG_ONLY(this->_blob = NULL); // silence a later assert | |
875 bxp->_before_expand = this->_before_expand; | |
876 this->_before_expand = bxp; | |
877 | |
878 // Give each section its required (expanded) capacity. | |
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879 for (int n = (int)SECT_LIMIT-1; n >= SECT_FIRST; n--) { |
0 | 880 CodeSection* cb_sect = cb.code_section(n); |
881 CodeSection* this_sect = code_section(n); | |
882 if (new_capacity[n] == 0) continue; // already nulled out | |
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883 if (n != SECT_INSTS) { |
0 | 884 cb.initialize_section_size(cb_sect, new_capacity[n]); |
885 } | |
886 assert(cb_sect->capacity() >= new_capacity[n], "big enough"); | |
887 address cb_start = cb_sect->start(); | |
888 cb_sect->set_end(cb_start + this_sect->size()); | |
889 if (this_sect->mark() == NULL) { | |
890 cb_sect->clear_mark(); | |
891 } else { | |
892 cb_sect->set_mark(cb_start + this_sect->mark_off()); | |
893 } | |
894 } | |
895 | |
896 // Move all the code and relocations to the new blob: | |
897 relocate_code_to(&cb); | |
898 | |
899 // Copy the temporary code buffer into the current code buffer. | |
900 // Basically, do {*this = cb}, except for some control information. | |
901 this->take_over_code_from(&cb); | |
902 cb.set_blob(NULL); | |
903 | |
904 // Zap the old code buffer contents, to avoid mistakenly using them. | |
905 debug_only(Copy::fill_to_bytes(bxp->_total_start, bxp->_total_size, | |
906 badCodeHeapFreeVal)); | |
907 | |
908 _decode_begin = NULL; // sanity | |
909 | |
910 // Make certain that the new sections are all snugly inside the new blob. | |
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911 verify_section_allocation(); |
0 | 912 |
913 #ifndef PRODUCT | |
914 if (PrintNMethods && (WizardMode || Verbose)) { | |
915 tty->print("expanded CodeBuffer:"); | |
916 this->print(); | |
917 } | |
918 #endif //PRODUCT | |
919 } | |
920 | |
921 void CodeBuffer::take_over_code_from(CodeBuffer* cb) { | |
922 // Must already have disposed of the old blob somehow. | |
923 assert(blob() == NULL, "must be empty"); | |
924 #ifdef ASSERT | |
925 | |
926 #endif | |
927 // Take the new blob away from cb. | |
928 set_blob(cb->blob()); | |
929 // Take over all the section pointers. | |
930 for (int n = 0; n < (int)SECT_LIMIT; n++) { | |
931 CodeSection* cb_sect = cb->code_section(n); | |
932 CodeSection* this_sect = code_section(n); | |
933 this_sect->take_over_code_from(cb_sect); | |
934 } | |
935 _overflow_arena = cb->_overflow_arena; | |
936 // Make sure the old cb won't try to use it or free it. | |
937 DEBUG_ONLY(cb->_blob = (BufferBlob*)badAddress); | |
938 } | |
939 | |
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940 void CodeBuffer::verify_section_allocation() { |
0 | 941 address tstart = _total_start; |
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942 if (tstart == badAddress) return; // smashed by set_blob(NULL) |
0 | 943 address tend = tstart + _total_size; |
944 if (_blob != NULL) { | |
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945 |
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946 guarantee(tstart >= _blob->content_begin(), "sanity"); |
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947 guarantee(tend <= _blob->content_end(), "sanity"); |
0 | 948 } |
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949 // Verify disjointness. |
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950 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) { |
0 | 951 CodeSection* sect = code_section(n); |
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952 if (!sect->is_allocated() || sect->is_empty()) continue; |
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953 guarantee((intptr_t)sect->start() % sect->alignment() == 0 |
0 | 954 || sect->is_empty() || _blob == NULL, |
955 "start is aligned"); | |
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956 for (int m = (int) SECT_FIRST; m < (int) SECT_LIMIT; m++) { |
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957 CodeSection* other = code_section(m); |
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958 if (!other->is_allocated() || other == sect) continue; |
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959 guarantee(!other->contains(sect->start() ), "sanity"); |
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960 // limit is an exclusive address and can be the start of another |
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961 // section. |
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962 guarantee(!other->contains(sect->limit() - 1), "sanity"); |
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963 } |
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964 guarantee(sect->end() <= tend, "sanity"); |
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965 guarantee(sect->end() <= sect->limit(), "sanity"); |
0 | 966 } |
967 } | |
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968 |
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969 void CodeBuffer::log_section_sizes(const char* name) { |
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970 if (xtty != NULL) { |
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971 // log info about buffer usage |
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972 xtty->print_cr("<blob name='%s' size='%d'>", name, _total_size); |
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973 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) { |
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974 CodeSection* sect = code_section(n); |
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975 if (!sect->is_allocated() || sect->is_empty()) continue; |
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976 xtty->print_cr("<sect index='%d' size='" SIZE_FORMAT "' free='" SIZE_FORMAT "'/>", |
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977 n, sect->limit() - sect->start(), sect->limit() - sect->end()); |
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978 } |
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979 xtty->print_cr("</blob>"); |
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980 } |
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981 } |
0 | 982 |
983 #ifndef PRODUCT | |
984 | |
985 void CodeSection::dump() { | |
986 address ptr = start(); | |
987 for (csize_t step; ptr < end(); ptr += step) { | |
988 step = end() - ptr; | |
989 if (step > jintSize * 4) step = jintSize * 4; | |
990 tty->print(PTR_FORMAT ": ", ptr); | |
991 while (step > 0) { | |
992 tty->print(" " PTR32_FORMAT, *(jint*)ptr); | |
993 ptr += jintSize; | |
994 } | |
995 tty->cr(); | |
996 } | |
997 } | |
998 | |
999 | |
1000 void CodeSection::decode() { | |
1001 Disassembler::decode(start(), end()); | |
1002 } | |
1003 | |
1004 | |
1005 void CodeBuffer::block_comment(intptr_t offset, const char * comment) { | |
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1006 _strings.add_comment(offset, comment); |
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1007 } |
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1008 |
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1009 const char* CodeBuffer::code_string(const char* str) { |
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1010 return _strings.add_string(str); |
0 | 1011 } |
1012 | |
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1013 class CodeString: public CHeapObj<mtCode> { |
0 | 1014 private: |
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1015 friend class CodeStrings; |
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1016 const char * _string; |
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1017 CodeString* _next; |
0 | 1018 intptr_t _offset; |
1019 | |
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1020 ~CodeString() { |
0 | 1021 assert(_next == NULL, "wrong interface for freeing list"); |
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1022 os::free((void*)_string, mtCode); |
0 | 1023 } |
1024 | |
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1025 bool is_comment() const { return _offset >= 0; } |
0 | 1026 |
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1027 public: |
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1028 CodeString(const char * string, intptr_t offset = -1) |
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1029 : _next(NULL), _offset(offset) { |
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1030 _string = os::strdup(string, mtCode); |
0 | 1031 } |
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1032 |
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1033 const char * string() const { return _string; } |
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1034 intptr_t offset() const { assert(_offset >= 0, "offset for non comment?"); return _offset; } |
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1035 CodeString* next() const { return _next; } |
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1036 |
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1037 void set_next(CodeString* next) { _next = next; } |
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1038 |
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1039 CodeString* first_comment() { |
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1040 if (is_comment()) { |
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1041 return this; |
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1042 } else { |
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1043 return next_comment(); |
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1044 } |
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1045 } |
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1046 CodeString* next_comment() const { |
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1047 CodeString* s = _next; |
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1048 while (s != NULL && !s->is_comment()) { |
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1049 s = s->_next; |
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1050 } |
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1051 return s; |
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1052 } |
0 | 1053 }; |
1054 | |
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1055 CodeString* CodeStrings::find(intptr_t offset) const { |
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1056 CodeString* a = _strings->first_comment(); |
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1057 while (a != NULL && a->offset() != offset) { |
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1058 a = a->next_comment(); |
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1059 } |
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1060 return a; |
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1061 } |
0 | 1062 |
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1063 // Convenience for add_comment. |
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1064 CodeString* CodeStrings::find_last(intptr_t offset) const { |
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1065 CodeString* a = find(offset); |
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1066 if (a != NULL) { |
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1067 CodeString* c = NULL; |
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1068 while (((c = a->next_comment()) != NULL) && (c->offset() == offset)) { |
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1069 a = c; |
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1070 } |
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1071 } |
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1072 return a; |
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1073 } |
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1074 |
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1075 void CodeStrings::add_comment(intptr_t offset, const char * comment) { |
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1076 CodeString* c = new CodeString(comment, offset); |
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1077 CodeString* inspos = (_strings == NULL) ? NULL : find_last(offset); |
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1078 |
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1079 if (inspos) { |
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1080 // insert after already existing comments with same offset |
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1081 c->set_next(inspos->next()); |
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1082 inspos->set_next(c); |
0 | 1083 } else { |
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1084 // no comments with such offset, yet. Insert before anything else. |
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1085 c->set_next(_strings); |
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1086 _strings = c; |
0 | 1087 } |
1088 } | |
1089 | |
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1090 void CodeStrings::assign(CodeStrings& other) { |
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1091 _strings = other._strings; |
0 | 1092 } |
1093 | |
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1094 void CodeStrings::print_block_comment(outputStream* stream, intptr_t offset) const { |
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1095 if (_strings != NULL) { |
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1096 CodeString* c = find(offset); |
0 | 1097 while (c && c->offset() == offset) { |
100
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1098 stream->bol(); |
0 | 1099 stream->print(" ;; "); |
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1100 stream->print_cr(c->string()); |
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1101 c = c->next_comment(); |
0 | 1102 } |
1103 } | |
1104 } | |
1105 | |
1106 | |
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1107 void CodeStrings::free() { |
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1108 CodeString* n = _strings; |
0 | 1109 while (n) { |
1110 // unlink the node from the list saving a pointer to the next | |
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1111 CodeString* p = n->next(); |
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1112 n->set_next(NULL); |
0 | 1113 delete n; |
1114 n = p; | |
1115 } | |
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1116 _strings = NULL; |
0 | 1117 } |
1118 | |
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1119 const char* CodeStrings::add_string(const char * string) { |
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1120 CodeString* s = new CodeString(string); |
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1121 s->set_next(_strings); |
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1122 _strings = s; |
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1123 assert(s->string() != NULL, "should have a string"); |
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1124 return s->string(); |
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1125 } |
0 | 1126 |
1127 void CodeBuffer::decode() { | |
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1128 ttyLocker ttyl; |
1748 | 1129 Disassembler::decode(decode_begin(), insts_end()); |
1130 _decode_begin = insts_end(); | |
0 | 1131 } |
1132 | |
1133 | |
1134 void CodeBuffer::skip_decode() { | |
1748 | 1135 _decode_begin = insts_end(); |
0 | 1136 } |
1137 | |
1138 | |
1139 void CodeBuffer::decode_all() { | |
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1140 ttyLocker ttyl; |
0 | 1141 for (int n = 0; n < (int)SECT_LIMIT; n++) { |
1142 // dump contents of each section | |
1143 CodeSection* cs = code_section(n); | |
1144 tty->print_cr("! %s:", code_section_name(n)); | |
1145 if (cs != consts()) | |
1146 cs->decode(); | |
1147 else | |
1148 cs->dump(); | |
1149 } | |
1150 } | |
1151 | |
1152 | |
1153 void CodeSection::print(const char* name) { | |
1154 csize_t locs_size = locs_end() - locs_start(); | |
1155 tty->print_cr(" %7s.code = " PTR_FORMAT " : " PTR_FORMAT " : " PTR_FORMAT " (%d of %d)%s", | |
1156 name, start(), end(), limit(), size(), capacity(), | |
1157 is_frozen()? " [frozen]": ""); | |
1158 tty->print_cr(" %7s.locs = " PTR_FORMAT " : " PTR_FORMAT " : " PTR_FORMAT " (%d of %d) point=%d", | |
1159 name, locs_start(), locs_end(), locs_limit(), locs_size, locs_capacity(), locs_point_off()); | |
1160 if (PrintRelocations) { | |
1161 RelocIterator iter(this); | |
1162 iter.print(); | |
1163 } | |
1164 } | |
1165 | |
1166 void CodeBuffer::print() { | |
1167 if (this == NULL) { | |
1168 tty->print_cr("NULL CodeBuffer pointer"); | |
1169 return; | |
1170 } | |
1171 | |
1172 tty->print_cr("CodeBuffer:"); | |
1173 for (int n = 0; n < (int)SECT_LIMIT; n++) { | |
1174 // print each section | |
1175 CodeSection* cs = code_section(n); | |
1176 cs->print(code_section_name(n)); | |
1177 } | |
1178 } | |
1179 | |
1180 #endif // PRODUCT |