Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psVirtualspace.cpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author | never |
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date | Sun, 25 Sep 2011 16:03:29 -0700 |
parents | f95d63e2154a |
children | a837fa3d3f86 |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
1552
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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 | |
3960 | 38 #ifdef TARGET_OS_FAMILY_bsd |
39 # include "os_bsd.inline.hpp" | |
40 #endif | |
0 | 41 |
42 // PSVirtualSpace | |
43 | |
44 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs, size_t alignment) : | |
45 _alignment(alignment) | |
46 { | |
47 set_reserved(rs); | |
48 set_committed(reserved_low_addr(), reserved_low_addr()); | |
49 DEBUG_ONLY(verify()); | |
50 } | |
51 | |
52 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs) : | |
53 _alignment(os::vm_page_size()) | |
54 { | |
55 set_reserved(rs); | |
56 set_committed(reserved_low_addr(), reserved_low_addr()); | |
57 DEBUG_ONLY(verify()); | |
58 } | |
59 | |
60 // Deprecated. | |
61 PSVirtualSpace::PSVirtualSpace(): _alignment(os::vm_page_size()) { | |
62 } | |
63 | |
64 // Deprecated. | |
65 bool PSVirtualSpace::initialize(ReservedSpace rs, | |
66 size_t commit_size) { | |
67 set_reserved(rs); | |
68 set_committed(reserved_low_addr(), reserved_low_addr()); | |
69 | |
70 // Commit to initial size. | |
71 assert(commit_size <= rs.size(), "commit_size too big"); | |
72 bool result = commit_size > 0 ? expand_by(commit_size) : true; | |
73 DEBUG_ONLY(verify()); | |
74 return result; | |
75 } | |
76 | |
77 PSVirtualSpace::~PSVirtualSpace() { | |
78 release(); | |
79 } | |
80 | |
81 bool PSVirtualSpace::contains(void* p) const { | |
82 char* const cp = (char*)p; | |
83 return cp >= committed_low_addr() && cp < committed_high_addr(); | |
84 } | |
85 | |
86 void PSVirtualSpace::release() { | |
87 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
237
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88 // This may not release memory it didn't reserve. |
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89 // Use rs.release() to release the underlying memory instead. |
0 | 90 _reserved_low_addr = _reserved_high_addr = NULL; |
91 _committed_low_addr = _committed_high_addr = NULL; | |
92 _special = false; | |
93 } | |
94 | |
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95 bool PSVirtualSpace::expand_by(size_t bytes) { |
0 | 96 assert(is_aligned(bytes), "arg not aligned"); |
97 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
98 | |
99 if (uncommitted_size() < bytes) { | |
100 return false; | |
101 } | |
102 | |
103 char* const base_addr = committed_high_addr(); | |
104 bool result = special() || os::commit_memory(base_addr, bytes, alignment()); | |
105 if (result) { | |
106 _committed_high_addr += bytes; | |
107 } | |
108 | |
109 return result; | |
110 } | |
111 | |
112 bool PSVirtualSpace::shrink_by(size_t bytes) { | |
113 assert(is_aligned(bytes), "arg not aligned"); | |
114 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
115 | |
116 if (committed_size() < bytes) { | |
117 return false; | |
118 } | |
119 | |
120 char* const base_addr = committed_high_addr() - bytes; | |
121 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
122 if (result) { | |
123 _committed_high_addr -= bytes; | |
124 } | |
125 | |
126 return result; | |
127 } | |
128 | |
129 size_t | |
130 PSVirtualSpace::expand_into(PSVirtualSpace* other_space, size_t bytes) { | |
131 assert(is_aligned(bytes), "arg not aligned"); | |
132 assert(grows_up(), "this space must grow up"); | |
133 assert(other_space->grows_down(), "other space must grow down"); | |
134 assert(reserved_high_addr() == other_space->reserved_low_addr(), | |
135 "spaces not contiguous"); | |
136 assert(special() == other_space->special(), "one space is special, the other is not"); | |
137 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
138 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
139 | |
140 size_t bytes_needed = bytes; | |
141 | |
142 // First use the uncommitted region in this space. | |
143 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
144 if (tmp_bytes > 0) { | |
145 if (expand_by(tmp_bytes)) { | |
146 bytes_needed -= tmp_bytes; | |
147 } else { | |
148 return 0; | |
149 } | |
150 } | |
151 | |
152 // Next take from the uncommitted region in the other space, and commit it. | |
153 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
154 if (tmp_bytes > 0) { | |
155 char* const commit_base = committed_high_addr(); | |
156 if (other_space->special() || | |
157 os::commit_memory(commit_base, tmp_bytes, alignment())) { | |
158 // Reduce the reserved region in the other space. | |
159 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
160 other_space->reserved_high_addr(), | |
161 other_space->special()); | |
162 | |
163 // Grow both reserved and committed in this space. | |
164 _reserved_high_addr += tmp_bytes; | |
165 _committed_high_addr += tmp_bytes; | |
166 bytes_needed -= tmp_bytes; | |
167 } else { | |
168 return bytes - bytes_needed; | |
169 } | |
170 } | |
171 | |
172 // Finally take from the already committed region in the other space. | |
173 tmp_bytes = bytes_needed; | |
174 if (tmp_bytes > 0) { | |
175 // Reduce both committed and reserved in the other space. | |
176 other_space->set_committed(other_space->committed_low_addr() + tmp_bytes, | |
177 other_space->committed_high_addr()); | |
178 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
179 other_space->reserved_high_addr(), | |
180 other_space->special()); | |
181 | |
182 // Grow both reserved and committed in this space. | |
183 _reserved_high_addr += tmp_bytes; | |
184 _committed_high_addr += tmp_bytes; | |
185 } | |
186 | |
187 return bytes; | |
188 } | |
189 | |
190 #ifndef PRODUCT | |
191 bool PSVirtualSpace::is_aligned(size_t value, size_t align) { | |
192 const size_t tmp_value = value + align - 1; | |
193 const size_t mask = ~(align - 1); | |
194 return (tmp_value & mask) == value; | |
195 } | |
196 | |
197 bool PSVirtualSpace::is_aligned(size_t value) const { | |
198 return is_aligned(value, alignment()); | |
199 } | |
200 | |
201 bool PSVirtualSpace::is_aligned(char* value) const { | |
202 return is_aligned((size_t)value); | |
203 } | |
204 | |
205 void PSVirtualSpace::verify() const { | |
206 assert(is_aligned(alignment(), os::vm_page_size()), "bad alignment"); | |
207 assert(is_aligned(reserved_low_addr()), "bad reserved_low_addr"); | |
208 assert(is_aligned(reserved_high_addr()), "bad reserved_high_addr"); | |
209 assert(is_aligned(committed_low_addr()), "bad committed_low_addr"); | |
210 assert(is_aligned(committed_high_addr()), "bad committed_high_addr"); | |
211 | |
212 // Reserved region must be non-empty or both addrs must be 0. | |
213 assert(reserved_low_addr() < reserved_high_addr() || | |
214 reserved_low_addr() == NULL && reserved_high_addr() == NULL, | |
215 "bad reserved addrs"); | |
216 assert(committed_low_addr() <= committed_high_addr(), "bad committed addrs"); | |
217 | |
218 if (grows_up()) { | |
219 assert(reserved_low_addr() == committed_low_addr(), "bad low addrs"); | |
220 assert(reserved_high_addr() >= committed_high_addr(), "bad high addrs"); | |
221 } else { | |
222 assert(reserved_high_addr() == committed_high_addr(), "bad high addrs"); | |
223 assert(reserved_low_addr() <= committed_low_addr(), "bad low addrs"); | |
224 } | |
225 } | |
226 | |
227 void PSVirtualSpace::print() const { | |
228 gclog_or_tty->print_cr("virtual space [" PTR_FORMAT "]: alignment=" | |
229 SIZE_FORMAT "K grows %s%s", | |
230 this, alignment() / K, grows_up() ? "up" : "down", | |
231 special() ? " (pinned in memory)" : ""); | |
232 gclog_or_tty->print_cr(" reserved=" SIZE_FORMAT "K" | |
233 " [" PTR_FORMAT "," PTR_FORMAT "]" | |
234 " committed=" SIZE_FORMAT "K" | |
235 " [" PTR_FORMAT "," PTR_FORMAT "]", | |
236 reserved_size() / K, | |
237 reserved_low_addr(), reserved_high_addr(), | |
238 committed_size() / K, | |
239 committed_low_addr(), committed_high_addr()); | |
240 } | |
241 #endif // #ifndef PRODUCT | |
242 | |
243 void PSVirtualSpace::print_space_boundaries_on(outputStream* st) const { | |
244 st->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ")", | |
245 low_boundary(), high(), high_boundary()); | |
246 } | |
247 | |
248 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs, | |
249 size_t alignment) : | |
250 PSVirtualSpace(alignment) | |
251 { | |
252 set_reserved(rs); | |
253 set_committed(reserved_high_addr(), reserved_high_addr()); | |
254 DEBUG_ONLY(verify()); | |
255 } | |
256 | |
257 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs) { | |
258 set_reserved(rs); | |
259 set_committed(reserved_high_addr(), reserved_high_addr()); | |
260 DEBUG_ONLY(verify()); | |
261 } | |
262 | |
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263 bool PSVirtualSpaceHighToLow::expand_by(size_t bytes) { |
0 | 264 assert(is_aligned(bytes), "arg not aligned"); |
265 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
266 | |
267 if (uncommitted_size() < bytes) { | |
268 return false; | |
269 } | |
270 | |
271 char* const base_addr = committed_low_addr() - bytes; | |
272 bool result = special() || os::commit_memory(base_addr, bytes, alignment()); | |
273 if (result) { | |
274 _committed_low_addr -= bytes; | |
275 } | |
276 | |
277 return result; | |
278 } | |
279 | |
280 bool PSVirtualSpaceHighToLow::shrink_by(size_t bytes) { | |
281 assert(is_aligned(bytes), "arg not aligned"); | |
282 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
283 | |
284 if (committed_size() < bytes) { | |
285 return false; | |
286 } | |
287 | |
288 char* const base_addr = committed_low_addr(); | |
289 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
290 if (result) { | |
291 _committed_low_addr += bytes; | |
292 } | |
293 | |
294 return result; | |
295 } | |
296 | |
297 size_t PSVirtualSpaceHighToLow::expand_into(PSVirtualSpace* other_space, | |
298 size_t bytes) { | |
299 assert(is_aligned(bytes), "arg not aligned"); | |
300 assert(grows_down(), "this space must grow down"); | |
301 assert(other_space->grows_up(), "other space must grow up"); | |
302 assert(reserved_low_addr() == other_space->reserved_high_addr(), | |
303 "spaces not contiguous"); | |
304 assert(special() == other_space->special(), "one space is special in memory, the other is not"); | |
305 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
306 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
307 | |
308 size_t bytes_needed = bytes; | |
309 | |
310 // First use the uncommitted region in this space. | |
311 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
312 if (tmp_bytes > 0) { | |
313 if (expand_by(tmp_bytes)) { | |
314 bytes_needed -= tmp_bytes; | |
315 } else { | |
316 return 0; | |
317 } | |
318 } | |
319 | |
320 // Next take from the uncommitted region in the other space, and commit it. | |
321 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
322 if (tmp_bytes > 0) { | |
323 char* const commit_base = committed_low_addr() - tmp_bytes; | |
324 if (other_space->special() || | |
325 os::commit_memory(commit_base, tmp_bytes, alignment())) { | |
326 // Reduce the reserved region in the other space. | |
327 other_space->set_reserved(other_space->reserved_low_addr(), | |
328 other_space->reserved_high_addr() - tmp_bytes, | |
329 other_space->special()); | |
330 | |
331 // Grow both reserved and committed in this space. | |
332 _reserved_low_addr -= tmp_bytes; | |
333 _committed_low_addr -= tmp_bytes; | |
334 bytes_needed -= tmp_bytes; | |
335 } else { | |
336 return bytes - bytes_needed; | |
337 } | |
338 } | |
339 | |
340 // Finally take from the already committed region in the other space. | |
341 tmp_bytes = bytes_needed; | |
342 if (tmp_bytes > 0) { | |
343 // Reduce both committed and reserved in the other space. | |
344 other_space->set_committed(other_space->committed_low_addr(), | |
345 other_space->committed_high_addr() - tmp_bytes); | |
346 other_space->set_reserved(other_space->reserved_low_addr(), | |
347 other_space->reserved_high_addr() - tmp_bytes, | |
348 other_space->special()); | |
349 | |
350 // Grow both reserved and committed in this space. | |
351 _reserved_low_addr -= tmp_bytes; | |
352 _committed_low_addr -= tmp_bytes; | |
353 } | |
354 | |
355 return bytes; | |
356 } | |
357 | |
358 void | |
359 PSVirtualSpaceHighToLow::print_space_boundaries_on(outputStream* st) const { | |
360 st->print_cr(" (" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT "]", | |
361 high_boundary(), low(), low_boundary()); | |
362 } |