Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psVirtualspace.cpp @ 19083:09292c24d555
LSStackSlotAllocator: hide inner class.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Sat, 31 Jan 2015 11:07:15 +0100 |
parents | 52b4284cb496 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2014, 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 "gc_implementation/parallelScavenge/psVirtualspace.hpp" | |
27 #include "runtime/os.hpp" | |
28 #include "runtime/virtualspace.hpp" | |
29 #ifdef TARGET_OS_FAMILY_linux | |
30 # include "os_linux.inline.hpp" | |
31 #endif | |
32 #ifdef TARGET_OS_FAMILY_solaris | |
33 # include "os_solaris.inline.hpp" | |
34 #endif | |
35 #ifdef TARGET_OS_FAMILY_windows | |
36 # include "os_windows.inline.hpp" | |
37 #endif | |
14411 | 38 #ifdef TARGET_OS_FAMILY_aix |
39 # include "os_aix.inline.hpp" | |
40 #endif | |
3960 | 41 #ifdef TARGET_OS_FAMILY_bsd |
42 # include "os_bsd.inline.hpp" | |
43 #endif | |
0 | 44 |
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45 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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46 |
0 | 47 // PSVirtualSpace |
48 | |
49 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs, size_t alignment) : | |
50 _alignment(alignment) | |
51 { | |
52 set_reserved(rs); | |
53 set_committed(reserved_low_addr(), reserved_low_addr()); | |
54 DEBUG_ONLY(verify()); | |
55 } | |
56 | |
57 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs) : | |
58 _alignment(os::vm_page_size()) | |
59 { | |
60 set_reserved(rs); | |
61 set_committed(reserved_low_addr(), reserved_low_addr()); | |
62 DEBUG_ONLY(verify()); | |
63 } | |
64 | |
65 // Deprecated. | |
66 PSVirtualSpace::PSVirtualSpace(): _alignment(os::vm_page_size()) { | |
67 } | |
68 | |
69 // Deprecated. | |
70 bool PSVirtualSpace::initialize(ReservedSpace rs, | |
71 size_t commit_size) { | |
72 set_reserved(rs); | |
73 set_committed(reserved_low_addr(), reserved_low_addr()); | |
74 | |
75 // Commit to initial size. | |
76 assert(commit_size <= rs.size(), "commit_size too big"); | |
77 bool result = commit_size > 0 ? expand_by(commit_size) : true; | |
78 DEBUG_ONLY(verify()); | |
79 return result; | |
80 } | |
81 | |
82 PSVirtualSpace::~PSVirtualSpace() { | |
83 release(); | |
84 } | |
85 | |
86 bool PSVirtualSpace::contains(void* p) const { | |
87 char* const cp = (char*)p; | |
88 return cp >= committed_low_addr() && cp < committed_high_addr(); | |
89 } | |
90 | |
91 void PSVirtualSpace::release() { | |
92 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
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93 // This may not release memory it didn't reserve. |
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94 // Use rs.release() to release the underlying memory instead. |
0 | 95 _reserved_low_addr = _reserved_high_addr = NULL; |
96 _committed_low_addr = _committed_high_addr = NULL; | |
97 _special = false; | |
98 } | |
99 | |
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100 bool PSVirtualSpace::expand_by(size_t bytes) { |
0 | 101 assert(is_aligned(bytes), "arg not aligned"); |
102 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
103 | |
104 if (uncommitted_size() < bytes) { | |
105 return false; | |
106 } | |
107 | |
108 char* const base_addr = committed_high_addr(); | |
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109 bool result = special() || |
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110 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
0 | 111 if (result) { |
112 _committed_high_addr += bytes; | |
113 } | |
114 | |
115 return result; | |
116 } | |
117 | |
118 bool PSVirtualSpace::shrink_by(size_t bytes) { | |
119 assert(is_aligned(bytes), "arg not aligned"); | |
120 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
121 | |
122 if (committed_size() < bytes) { | |
123 return false; | |
124 } | |
125 | |
126 char* const base_addr = committed_high_addr() - bytes; | |
127 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
128 if (result) { | |
129 _committed_high_addr -= bytes; | |
130 } | |
131 | |
132 return result; | |
133 } | |
134 | |
135 size_t | |
136 PSVirtualSpace::expand_into(PSVirtualSpace* other_space, size_t bytes) { | |
137 assert(is_aligned(bytes), "arg not aligned"); | |
138 assert(grows_up(), "this space must grow up"); | |
139 assert(other_space->grows_down(), "other space must grow down"); | |
140 assert(reserved_high_addr() == other_space->reserved_low_addr(), | |
141 "spaces not contiguous"); | |
142 assert(special() == other_space->special(), "one space is special, the other is not"); | |
143 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
144 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
145 | |
146 size_t bytes_needed = bytes; | |
147 | |
148 // First use the uncommitted region in this space. | |
149 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
150 if (tmp_bytes > 0) { | |
151 if (expand_by(tmp_bytes)) { | |
152 bytes_needed -= tmp_bytes; | |
153 } else { | |
154 return 0; | |
155 } | |
156 } | |
157 | |
158 // Next take from the uncommitted region in the other space, and commit it. | |
159 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
160 if (tmp_bytes > 0) { | |
161 char* const commit_base = committed_high_addr(); | |
162 if (other_space->special() || | |
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163 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
0 | 164 // Reduce the reserved region in the other space. |
165 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
166 other_space->reserved_high_addr(), | |
167 other_space->special()); | |
168 | |
169 // Grow both reserved and committed in this space. | |
170 _reserved_high_addr += tmp_bytes; | |
171 _committed_high_addr += tmp_bytes; | |
172 bytes_needed -= tmp_bytes; | |
173 } else { | |
174 return bytes - bytes_needed; | |
175 } | |
176 } | |
177 | |
178 // Finally take from the already committed region in the other space. | |
179 tmp_bytes = bytes_needed; | |
180 if (tmp_bytes > 0) { | |
181 // Reduce both committed and reserved in the other space. | |
182 other_space->set_committed(other_space->committed_low_addr() + tmp_bytes, | |
183 other_space->committed_high_addr()); | |
184 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
185 other_space->reserved_high_addr(), | |
186 other_space->special()); | |
187 | |
188 // Grow both reserved and committed in this space. | |
189 _reserved_high_addr += tmp_bytes; | |
190 _committed_high_addr += tmp_bytes; | |
191 } | |
192 | |
193 return bytes; | |
194 } | |
195 | |
196 #ifndef PRODUCT | |
197 bool PSVirtualSpace::is_aligned(size_t value, size_t align) { | |
198 const size_t tmp_value = value + align - 1; | |
199 const size_t mask = ~(align - 1); | |
200 return (tmp_value & mask) == value; | |
201 } | |
202 | |
203 bool PSVirtualSpace::is_aligned(size_t value) const { | |
204 return is_aligned(value, alignment()); | |
205 } | |
206 | |
207 bool PSVirtualSpace::is_aligned(char* value) const { | |
208 return is_aligned((size_t)value); | |
209 } | |
210 | |
211 void PSVirtualSpace::verify() const { | |
212 assert(is_aligned(alignment(), os::vm_page_size()), "bad alignment"); | |
213 assert(is_aligned(reserved_low_addr()), "bad reserved_low_addr"); | |
214 assert(is_aligned(reserved_high_addr()), "bad reserved_high_addr"); | |
215 assert(is_aligned(committed_low_addr()), "bad committed_low_addr"); | |
216 assert(is_aligned(committed_high_addr()), "bad committed_high_addr"); | |
217 | |
218 // Reserved region must be non-empty or both addrs must be 0. | |
219 assert(reserved_low_addr() < reserved_high_addr() || | |
220 reserved_low_addr() == NULL && reserved_high_addr() == NULL, | |
221 "bad reserved addrs"); | |
222 assert(committed_low_addr() <= committed_high_addr(), "bad committed addrs"); | |
223 | |
224 if (grows_up()) { | |
225 assert(reserved_low_addr() == committed_low_addr(), "bad low addrs"); | |
226 assert(reserved_high_addr() >= committed_high_addr(), "bad high addrs"); | |
227 } else { | |
228 assert(reserved_high_addr() == committed_high_addr(), "bad high addrs"); | |
229 assert(reserved_low_addr() <= committed_low_addr(), "bad low addrs"); | |
230 } | |
231 } | |
232 | |
233 void PSVirtualSpace::print() const { | |
234 gclog_or_tty->print_cr("virtual space [" PTR_FORMAT "]: alignment=" | |
235 SIZE_FORMAT "K grows %s%s", | |
236 this, alignment() / K, grows_up() ? "up" : "down", | |
237 special() ? " (pinned in memory)" : ""); | |
238 gclog_or_tty->print_cr(" reserved=" SIZE_FORMAT "K" | |
239 " [" PTR_FORMAT "," PTR_FORMAT "]" | |
240 " committed=" SIZE_FORMAT "K" | |
241 " [" PTR_FORMAT "," PTR_FORMAT "]", | |
242 reserved_size() / K, | |
243 reserved_low_addr(), reserved_high_addr(), | |
244 committed_size() / K, | |
245 committed_low_addr(), committed_high_addr()); | |
246 } | |
247 #endif // #ifndef PRODUCT | |
248 | |
249 void PSVirtualSpace::print_space_boundaries_on(outputStream* st) const { | |
250 st->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ")", | |
251 low_boundary(), high(), high_boundary()); | |
252 } | |
253 | |
254 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs, | |
255 size_t alignment) : | |
256 PSVirtualSpace(alignment) | |
257 { | |
258 set_reserved(rs); | |
259 set_committed(reserved_high_addr(), reserved_high_addr()); | |
260 DEBUG_ONLY(verify()); | |
261 } | |
262 | |
263 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs) { | |
264 set_reserved(rs); | |
265 set_committed(reserved_high_addr(), reserved_high_addr()); | |
266 DEBUG_ONLY(verify()); | |
267 } | |
268 | |
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269 bool PSVirtualSpaceHighToLow::expand_by(size_t bytes) { |
0 | 270 assert(is_aligned(bytes), "arg not aligned"); |
271 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
272 | |
273 if (uncommitted_size() < bytes) { | |
274 return false; | |
275 } | |
276 | |
277 char* const base_addr = committed_low_addr() - bytes; | |
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278 bool result = special() || |
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279 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
0 | 280 if (result) { |
281 _committed_low_addr -= bytes; | |
282 } | |
283 | |
284 return result; | |
285 } | |
286 | |
287 bool PSVirtualSpaceHighToLow::shrink_by(size_t bytes) { | |
288 assert(is_aligned(bytes), "arg not aligned"); | |
289 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
290 | |
291 if (committed_size() < bytes) { | |
292 return false; | |
293 } | |
294 | |
295 char* const base_addr = committed_low_addr(); | |
296 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
297 if (result) { | |
298 _committed_low_addr += bytes; | |
299 } | |
300 | |
301 return result; | |
302 } | |
303 | |
304 size_t PSVirtualSpaceHighToLow::expand_into(PSVirtualSpace* other_space, | |
305 size_t bytes) { | |
306 assert(is_aligned(bytes), "arg not aligned"); | |
307 assert(grows_down(), "this space must grow down"); | |
308 assert(other_space->grows_up(), "other space must grow up"); | |
309 assert(reserved_low_addr() == other_space->reserved_high_addr(), | |
310 "spaces not contiguous"); | |
311 assert(special() == other_space->special(), "one space is special in memory, the other is not"); | |
312 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
313 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
314 | |
315 size_t bytes_needed = bytes; | |
316 | |
317 // First use the uncommitted region in this space. | |
318 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
319 if (tmp_bytes > 0) { | |
320 if (expand_by(tmp_bytes)) { | |
321 bytes_needed -= tmp_bytes; | |
322 } else { | |
323 return 0; | |
324 } | |
325 } | |
326 | |
327 // Next take from the uncommitted region in the other space, and commit it. | |
328 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
329 if (tmp_bytes > 0) { | |
330 char* const commit_base = committed_low_addr() - tmp_bytes; | |
331 if (other_space->special() || | |
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332 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
0 | 333 // Reduce the reserved region in the other space. |
334 other_space->set_reserved(other_space->reserved_low_addr(), | |
335 other_space->reserved_high_addr() - tmp_bytes, | |
336 other_space->special()); | |
337 | |
338 // Grow both reserved and committed in this space. | |
339 _reserved_low_addr -= tmp_bytes; | |
340 _committed_low_addr -= tmp_bytes; | |
341 bytes_needed -= tmp_bytes; | |
342 } else { | |
343 return bytes - bytes_needed; | |
344 } | |
345 } | |
346 | |
347 // Finally take from the already committed region in the other space. | |
348 tmp_bytes = bytes_needed; | |
349 if (tmp_bytes > 0) { | |
350 // Reduce both committed and reserved in the other space. | |
351 other_space->set_committed(other_space->committed_low_addr(), | |
352 other_space->committed_high_addr() - tmp_bytes); | |
353 other_space->set_reserved(other_space->reserved_low_addr(), | |
354 other_space->reserved_high_addr() - tmp_bytes, | |
355 other_space->special()); | |
356 | |
357 // Grow both reserved and committed in this space. | |
358 _reserved_low_addr -= tmp_bytes; | |
359 _committed_low_addr -= tmp_bytes; | |
360 } | |
361 | |
362 return bytes; | |
363 } | |
364 | |
365 void | |
366 PSVirtualSpaceHighToLow::print_space_boundaries_on(outputStream* st) const { | |
367 st->print_cr(" (" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT "]", | |
368 high_boundary(), low(), low_boundary()); | |
369 } |