Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psVirtualspace.cpp @ 13422:55dd6e77b399
8028624: [TESTBUG] compiler/intrinsics/mathexact/DecExactLTest executes DecExactITest
Reviewed-by: kvn, twisti
author | rbackman |
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date | Fri, 22 Nov 2013 15:26:37 +0100 |
parents | a837fa3d3f86 |
children | bdd155477289 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2013, 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)); | |
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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(); | |
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104 bool result = special() || |
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105 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
0 | 106 if (result) { |
107 _committed_high_addr += bytes; | |
108 } | |
109 | |
110 return result; | |
111 } | |
112 | |
113 bool PSVirtualSpace::shrink_by(size_t bytes) { | |
114 assert(is_aligned(bytes), "arg not aligned"); | |
115 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
116 | |
117 if (committed_size() < bytes) { | |
118 return false; | |
119 } | |
120 | |
121 char* const base_addr = committed_high_addr() - bytes; | |
122 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
123 if (result) { | |
124 _committed_high_addr -= bytes; | |
125 } | |
126 | |
127 return result; | |
128 } | |
129 | |
130 size_t | |
131 PSVirtualSpace::expand_into(PSVirtualSpace* other_space, size_t bytes) { | |
132 assert(is_aligned(bytes), "arg not aligned"); | |
133 assert(grows_up(), "this space must grow up"); | |
134 assert(other_space->grows_down(), "other space must grow down"); | |
135 assert(reserved_high_addr() == other_space->reserved_low_addr(), | |
136 "spaces not contiguous"); | |
137 assert(special() == other_space->special(), "one space is special, the other is not"); | |
138 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
139 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
140 | |
141 size_t bytes_needed = bytes; | |
142 | |
143 // First use the uncommitted region in this space. | |
144 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
145 if (tmp_bytes > 0) { | |
146 if (expand_by(tmp_bytes)) { | |
147 bytes_needed -= tmp_bytes; | |
148 } else { | |
149 return 0; | |
150 } | |
151 } | |
152 | |
153 // Next take from the uncommitted region in the other space, and commit it. | |
154 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
155 if (tmp_bytes > 0) { | |
156 char* const commit_base = committed_high_addr(); | |
157 if (other_space->special() || | |
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158 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
0 | 159 // Reduce the reserved region in the other space. |
160 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
161 other_space->reserved_high_addr(), | |
162 other_space->special()); | |
163 | |
164 // Grow both reserved and committed in this space. | |
165 _reserved_high_addr += tmp_bytes; | |
166 _committed_high_addr += tmp_bytes; | |
167 bytes_needed -= tmp_bytes; | |
168 } else { | |
169 return bytes - bytes_needed; | |
170 } | |
171 } | |
172 | |
173 // Finally take from the already committed region in the other space. | |
174 tmp_bytes = bytes_needed; | |
175 if (tmp_bytes > 0) { | |
176 // Reduce both committed and reserved in the other space. | |
177 other_space->set_committed(other_space->committed_low_addr() + tmp_bytes, | |
178 other_space->committed_high_addr()); | |
179 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
180 other_space->reserved_high_addr(), | |
181 other_space->special()); | |
182 | |
183 // Grow both reserved and committed in this space. | |
184 _reserved_high_addr += tmp_bytes; | |
185 _committed_high_addr += tmp_bytes; | |
186 } | |
187 | |
188 return bytes; | |
189 } | |
190 | |
191 #ifndef PRODUCT | |
192 bool PSVirtualSpace::is_aligned(size_t value, size_t align) { | |
193 const size_t tmp_value = value + align - 1; | |
194 const size_t mask = ~(align - 1); | |
195 return (tmp_value & mask) == value; | |
196 } | |
197 | |
198 bool PSVirtualSpace::is_aligned(size_t value) const { | |
199 return is_aligned(value, alignment()); | |
200 } | |
201 | |
202 bool PSVirtualSpace::is_aligned(char* value) const { | |
203 return is_aligned((size_t)value); | |
204 } | |
205 | |
206 void PSVirtualSpace::verify() const { | |
207 assert(is_aligned(alignment(), os::vm_page_size()), "bad alignment"); | |
208 assert(is_aligned(reserved_low_addr()), "bad reserved_low_addr"); | |
209 assert(is_aligned(reserved_high_addr()), "bad reserved_high_addr"); | |
210 assert(is_aligned(committed_low_addr()), "bad committed_low_addr"); | |
211 assert(is_aligned(committed_high_addr()), "bad committed_high_addr"); | |
212 | |
213 // Reserved region must be non-empty or both addrs must be 0. | |
214 assert(reserved_low_addr() < reserved_high_addr() || | |
215 reserved_low_addr() == NULL && reserved_high_addr() == NULL, | |
216 "bad reserved addrs"); | |
217 assert(committed_low_addr() <= committed_high_addr(), "bad committed addrs"); | |
218 | |
219 if (grows_up()) { | |
220 assert(reserved_low_addr() == committed_low_addr(), "bad low addrs"); | |
221 assert(reserved_high_addr() >= committed_high_addr(), "bad high addrs"); | |
222 } else { | |
223 assert(reserved_high_addr() == committed_high_addr(), "bad high addrs"); | |
224 assert(reserved_low_addr() <= committed_low_addr(), "bad low addrs"); | |
225 } | |
226 } | |
227 | |
228 void PSVirtualSpace::print() const { | |
229 gclog_or_tty->print_cr("virtual space [" PTR_FORMAT "]: alignment=" | |
230 SIZE_FORMAT "K grows %s%s", | |
231 this, alignment() / K, grows_up() ? "up" : "down", | |
232 special() ? " (pinned in memory)" : ""); | |
233 gclog_or_tty->print_cr(" reserved=" SIZE_FORMAT "K" | |
234 " [" PTR_FORMAT "," PTR_FORMAT "]" | |
235 " committed=" SIZE_FORMAT "K" | |
236 " [" PTR_FORMAT "," PTR_FORMAT "]", | |
237 reserved_size() / K, | |
238 reserved_low_addr(), reserved_high_addr(), | |
239 committed_size() / K, | |
240 committed_low_addr(), committed_high_addr()); | |
241 } | |
242 #endif // #ifndef PRODUCT | |
243 | |
244 void PSVirtualSpace::print_space_boundaries_on(outputStream* st) const { | |
245 st->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ")", | |
246 low_boundary(), high(), high_boundary()); | |
247 } | |
248 | |
249 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs, | |
250 size_t alignment) : | |
251 PSVirtualSpace(alignment) | |
252 { | |
253 set_reserved(rs); | |
254 set_committed(reserved_high_addr(), reserved_high_addr()); | |
255 DEBUG_ONLY(verify()); | |
256 } | |
257 | |
258 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs) { | |
259 set_reserved(rs); | |
260 set_committed(reserved_high_addr(), reserved_high_addr()); | |
261 DEBUG_ONLY(verify()); | |
262 } | |
263 | |
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264 bool PSVirtualSpaceHighToLow::expand_by(size_t bytes) { |
0 | 265 assert(is_aligned(bytes), "arg not aligned"); |
266 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
267 | |
268 if (uncommitted_size() < bytes) { | |
269 return false; | |
270 } | |
271 | |
272 char* const base_addr = committed_low_addr() - bytes; | |
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273 bool result = special() || |
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274 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
0 | 275 if (result) { |
276 _committed_low_addr -= bytes; | |
277 } | |
278 | |
279 return result; | |
280 } | |
281 | |
282 bool PSVirtualSpaceHighToLow::shrink_by(size_t bytes) { | |
283 assert(is_aligned(bytes), "arg not aligned"); | |
284 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
285 | |
286 if (committed_size() < bytes) { | |
287 return false; | |
288 } | |
289 | |
290 char* const base_addr = committed_low_addr(); | |
291 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
292 if (result) { | |
293 _committed_low_addr += bytes; | |
294 } | |
295 | |
296 return result; | |
297 } | |
298 | |
299 size_t PSVirtualSpaceHighToLow::expand_into(PSVirtualSpace* other_space, | |
300 size_t bytes) { | |
301 assert(is_aligned(bytes), "arg not aligned"); | |
302 assert(grows_down(), "this space must grow down"); | |
303 assert(other_space->grows_up(), "other space must grow up"); | |
304 assert(reserved_low_addr() == other_space->reserved_high_addr(), | |
305 "spaces not contiguous"); | |
306 assert(special() == other_space->special(), "one space is special in memory, the other is not"); | |
307 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
308 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
309 | |
310 size_t bytes_needed = bytes; | |
311 | |
312 // First use the uncommitted region in this space. | |
313 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
314 if (tmp_bytes > 0) { | |
315 if (expand_by(tmp_bytes)) { | |
316 bytes_needed -= tmp_bytes; | |
317 } else { | |
318 return 0; | |
319 } | |
320 } | |
321 | |
322 // Next take from the uncommitted region in the other space, and commit it. | |
323 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
324 if (tmp_bytes > 0) { | |
325 char* const commit_base = committed_low_addr() - tmp_bytes; | |
326 if (other_space->special() || | |
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327 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
0 | 328 // Reduce the reserved region in the other space. |
329 other_space->set_reserved(other_space->reserved_low_addr(), | |
330 other_space->reserved_high_addr() - tmp_bytes, | |
331 other_space->special()); | |
332 | |
333 // Grow both reserved and committed in this space. | |
334 _reserved_low_addr -= tmp_bytes; | |
335 _committed_low_addr -= tmp_bytes; | |
336 bytes_needed -= tmp_bytes; | |
337 } else { | |
338 return bytes - bytes_needed; | |
339 } | |
340 } | |
341 | |
342 // Finally take from the already committed region in the other space. | |
343 tmp_bytes = bytes_needed; | |
344 if (tmp_bytes > 0) { | |
345 // Reduce both committed and reserved in the other space. | |
346 other_space->set_committed(other_space->committed_low_addr(), | |
347 other_space->committed_high_addr() - tmp_bytes); | |
348 other_space->set_reserved(other_space->reserved_low_addr(), | |
349 other_space->reserved_high_addr() - tmp_bytes, | |
350 other_space->special()); | |
351 | |
352 // Grow both reserved and committed in this space. | |
353 _reserved_low_addr -= tmp_bytes; | |
354 _committed_low_addr -= tmp_bytes; | |
355 } | |
356 | |
357 return bytes; | |
358 } | |
359 | |
360 void | |
361 PSVirtualSpaceHighToLow::print_space_boundaries_on(outputStream* st) const { | |
362 st->print_cr(" (" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT "]", | |
363 high_boundary(), low(), low_boundary()); | |
364 } |