author | stefank |
Thu, 01 Sep 2011 16:18:17 +0200 | |
changeset 10524 | 6594ca81279a |
parent 7397 | 5b173b4ca846 |
child 10565 | dc90c239f4ec |
permissions | -rw-r--r-- |
1 | 1 |
/* |
7397 | 2 |
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
1 | 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 |
* |
|
5547
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
2105
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
2105
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
2105
diff
changeset
|
21 |
* questions. |
1 | 22 |
* |
23 |
*/ |
|
24 |
||
7397 | 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 |
|
1 | 38 |
|
39 |
// PSVirtualSpace |
|
40 |
||
41 |
PSVirtualSpace::PSVirtualSpace(ReservedSpace rs, size_t alignment) : |
|
42 |
_alignment(alignment) |
|
43 |
{ |
|
44 |
set_reserved(rs); |
|
45 |
set_committed(reserved_low_addr(), reserved_low_addr()); |
|
46 |
DEBUG_ONLY(verify()); |
|
47 |
} |
|
48 |
||
49 |
PSVirtualSpace::PSVirtualSpace(ReservedSpace rs) : |
|
50 |
_alignment(os::vm_page_size()) |
|
51 |
{ |
|
52 |
set_reserved(rs); |
|
53 |
set_committed(reserved_low_addr(), reserved_low_addr()); |
|
54 |
DEBUG_ONLY(verify()); |
|
55 |
} |
|
56 |
||
57 |
// Deprecated. |
|
58 |
PSVirtualSpace::PSVirtualSpace(): _alignment(os::vm_page_size()) { |
|
59 |
} |
|
60 |
||
61 |
// Deprecated. |
|
62 |
bool PSVirtualSpace::initialize(ReservedSpace rs, |
|
63 |
size_t commit_size) { |
|
64 |
set_reserved(rs); |
|
65 |
set_committed(reserved_low_addr(), reserved_low_addr()); |
|
66 |
||
67 |
// Commit to initial size. |
|
68 |
assert(commit_size <= rs.size(), "commit_size too big"); |
|
69 |
bool result = commit_size > 0 ? expand_by(commit_size) : true; |
|
70 |
DEBUG_ONLY(verify()); |
|
71 |
return result; |
|
72 |
} |
|
73 |
||
74 |
PSVirtualSpace::~PSVirtualSpace() { |
|
75 |
release(); |
|
76 |
} |
|
77 |
||
78 |
bool PSVirtualSpace::contains(void* p) const { |
|
79 |
char* const cp = (char*)p; |
|
80 |
return cp >= committed_low_addr() && cp < committed_high_addr(); |
|
81 |
} |
|
82 |
||
83 |
void PSVirtualSpace::release() { |
|
84 |
DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); |
|
823
9a5271881bc0
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
1
diff
changeset
|
85 |
// This may not release memory it didn't reserve. |
9a5271881bc0
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
1
diff
changeset
|
86 |
// Use rs.release() to release the underlying memory instead. |
1 | 87 |
_reserved_low_addr = _reserved_high_addr = NULL; |
88 |
_committed_low_addr = _committed_high_addr = NULL; |
|
89 |
_special = false; |
|
90 |
} |
|
91 |
||
1911
b7cfe7eb809c
6783381: NUMA allocator: don't pretouch eden space with UseNUMA
iveresov
parents:
1217
diff
changeset
|
92 |
bool PSVirtualSpace::expand_by(size_t bytes) { |
1 | 93 |
assert(is_aligned(bytes), "arg not aligned"); |
94 |
DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); |
|
95 |
||
96 |
if (uncommitted_size() < bytes) { |
|
97 |
return false; |
|
98 |
} |
|
99 |
||
100 |
char* const base_addr = committed_high_addr(); |
|
101 |
bool result = special() || os::commit_memory(base_addr, bytes, alignment()); |
|
102 |
if (result) { |
|
103 |
_committed_high_addr += bytes; |
|
104 |
} |
|
105 |
||
106 |
return result; |
|
107 |
} |
|
108 |
||
109 |
bool PSVirtualSpace::shrink_by(size_t bytes) { |
|
110 |
assert(is_aligned(bytes), "arg not aligned"); |
|
111 |
DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); |
|
112 |
||
113 |
if (committed_size() < bytes) { |
|
114 |
return false; |
|
115 |
} |
|
116 |
||
117 |
char* const base_addr = committed_high_addr() - bytes; |
|
118 |
bool result = special() || os::uncommit_memory(base_addr, bytes); |
|
119 |
if (result) { |
|
120 |
_committed_high_addr -= bytes; |
|
121 |
} |
|
122 |
||
123 |
return result; |
|
124 |
} |
|
125 |
||
126 |
size_t |
|
127 |
PSVirtualSpace::expand_into(PSVirtualSpace* other_space, size_t bytes) { |
|
128 |
assert(is_aligned(bytes), "arg not aligned"); |
|
129 |
assert(grows_up(), "this space must grow up"); |
|
130 |
assert(other_space->grows_down(), "other space must grow down"); |
|
131 |
assert(reserved_high_addr() == other_space->reserved_low_addr(), |
|
132 |
"spaces not contiguous"); |
|
133 |
assert(special() == other_space->special(), "one space is special, the other is not"); |
|
134 |
DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); |
|
135 |
DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); |
|
136 |
||
137 |
size_t bytes_needed = bytes; |
|
138 |
||
139 |
// First use the uncommitted region in this space. |
|
140 |
size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); |
|
141 |
if (tmp_bytes > 0) { |
|
142 |
if (expand_by(tmp_bytes)) { |
|
143 |
bytes_needed -= tmp_bytes; |
|
144 |
} else { |
|
145 |
return 0; |
|
146 |
} |
|
147 |
} |
|
148 |
||
149 |
// Next take from the uncommitted region in the other space, and commit it. |
|
150 |
tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); |
|
151 |
if (tmp_bytes > 0) { |
|
152 |
char* const commit_base = committed_high_addr(); |
|
153 |
if (other_space->special() || |
|
154 |
os::commit_memory(commit_base, tmp_bytes, alignment())) { |
|
155 |
// Reduce the reserved region in the other space. |
|
156 |
other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, |
|
157 |
other_space->reserved_high_addr(), |
|
158 |
other_space->special()); |
|
159 |
||
160 |
// Grow both reserved and committed in this space. |
|
161 |
_reserved_high_addr += tmp_bytes; |
|
162 |
_committed_high_addr += tmp_bytes; |
|
163 |
bytes_needed -= tmp_bytes; |
|
164 |
} else { |
|
165 |
return bytes - bytes_needed; |
|
166 |
} |
|
167 |
} |
|
168 |
||
169 |
// Finally take from the already committed region in the other space. |
|
170 |
tmp_bytes = bytes_needed; |
|
171 |
if (tmp_bytes > 0) { |
|
172 |
// Reduce both committed and reserved in the other space. |
|
173 |
other_space->set_committed(other_space->committed_low_addr() + tmp_bytes, |
|
174 |
other_space->committed_high_addr()); |
|
175 |
other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, |
|
176 |
other_space->reserved_high_addr(), |
|
177 |
other_space->special()); |
|
178 |
||
179 |
// Grow both reserved and committed in this space. |
|
180 |
_reserved_high_addr += tmp_bytes; |
|
181 |
_committed_high_addr += tmp_bytes; |
|
182 |
} |
|
183 |
||
184 |
return bytes; |
|
185 |
} |
|
186 |
||
187 |
#ifndef PRODUCT |
|
188 |
bool PSVirtualSpace::is_aligned(size_t value, size_t align) { |
|
189 |
const size_t tmp_value = value + align - 1; |
|
190 |
const size_t mask = ~(align - 1); |
|
191 |
return (tmp_value & mask) == value; |
|
192 |
} |
|
193 |
||
194 |
bool PSVirtualSpace::is_aligned(size_t value) const { |
|
195 |
return is_aligned(value, alignment()); |
|
196 |
} |
|
197 |
||
198 |
bool PSVirtualSpace::is_aligned(char* value) const { |
|
199 |
return is_aligned((size_t)value); |
|
200 |
} |
|
201 |
||
202 |
void PSVirtualSpace::verify() const { |
|
203 |
assert(is_aligned(alignment(), os::vm_page_size()), "bad alignment"); |
|
204 |
assert(is_aligned(reserved_low_addr()), "bad reserved_low_addr"); |
|
205 |
assert(is_aligned(reserved_high_addr()), "bad reserved_high_addr"); |
|
206 |
assert(is_aligned(committed_low_addr()), "bad committed_low_addr"); |
|
207 |
assert(is_aligned(committed_high_addr()), "bad committed_high_addr"); |
|
208 |
||
209 |
// Reserved region must be non-empty or both addrs must be 0. |
|
210 |
assert(reserved_low_addr() < reserved_high_addr() || |
|
211 |
reserved_low_addr() == NULL && reserved_high_addr() == NULL, |
|
212 |
"bad reserved addrs"); |
|
213 |
assert(committed_low_addr() <= committed_high_addr(), "bad committed addrs"); |
|
214 |
||
215 |
if (grows_up()) { |
|
216 |
assert(reserved_low_addr() == committed_low_addr(), "bad low addrs"); |
|
217 |
assert(reserved_high_addr() >= committed_high_addr(), "bad high addrs"); |
|
218 |
} else { |
|
219 |
assert(reserved_high_addr() == committed_high_addr(), "bad high addrs"); |
|
220 |
assert(reserved_low_addr() <= committed_low_addr(), "bad low addrs"); |
|
221 |
} |
|
222 |
} |
|
223 |
||
224 |
void PSVirtualSpace::print() const { |
|
225 |
gclog_or_tty->print_cr("virtual space [" PTR_FORMAT "]: alignment=" |
|
226 |
SIZE_FORMAT "K grows %s%s", |
|
227 |
this, alignment() / K, grows_up() ? "up" : "down", |
|
228 |
special() ? " (pinned in memory)" : ""); |
|
229 |
gclog_or_tty->print_cr(" reserved=" SIZE_FORMAT "K" |
|
230 |
" [" PTR_FORMAT "," PTR_FORMAT "]" |
|
231 |
" committed=" SIZE_FORMAT "K" |
|
232 |
" [" PTR_FORMAT "," PTR_FORMAT "]", |
|
233 |
reserved_size() / K, |
|
234 |
reserved_low_addr(), reserved_high_addr(), |
|
235 |
committed_size() / K, |
|
236 |
committed_low_addr(), committed_high_addr()); |
|
237 |
} |
|
238 |
#endif // #ifndef PRODUCT |
|
239 |
||
240 |
void PSVirtualSpace::print_space_boundaries_on(outputStream* st) const { |
|
241 |
st->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ")", |
|
242 |
low_boundary(), high(), high_boundary()); |
|
243 |
} |
|
244 |
||
245 |
PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs, |
|
246 |
size_t alignment) : |
|
247 |
PSVirtualSpace(alignment) |
|
248 |
{ |
|
249 |
set_reserved(rs); |
|
250 |
set_committed(reserved_high_addr(), reserved_high_addr()); |
|
251 |
DEBUG_ONLY(verify()); |
|
252 |
} |
|
253 |
||
254 |
PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs) { |
|
255 |
set_reserved(rs); |
|
256 |
set_committed(reserved_high_addr(), reserved_high_addr()); |
|
257 |
DEBUG_ONLY(verify()); |
|
258 |
} |
|
259 |
||
1911
b7cfe7eb809c
6783381: NUMA allocator: don't pretouch eden space with UseNUMA
iveresov
parents:
1217
diff
changeset
|
260 |
bool PSVirtualSpaceHighToLow::expand_by(size_t bytes) { |
1 | 261 |
assert(is_aligned(bytes), "arg not aligned"); |
262 |
DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); |
|
263 |
||
264 |
if (uncommitted_size() < bytes) { |
|
265 |
return false; |
|
266 |
} |
|
267 |
||
268 |
char* const base_addr = committed_low_addr() - bytes; |
|
269 |
bool result = special() || os::commit_memory(base_addr, bytes, alignment()); |
|
270 |
if (result) { |
|
271 |
_committed_low_addr -= bytes; |
|
272 |
} |
|
273 |
||
274 |
return result; |
|
275 |
} |
|
276 |
||
277 |
bool PSVirtualSpaceHighToLow::shrink_by(size_t bytes) { |
|
278 |
assert(is_aligned(bytes), "arg not aligned"); |
|
279 |
DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); |
|
280 |
||
281 |
if (committed_size() < bytes) { |
|
282 |
return false; |
|
283 |
} |
|
284 |
||
285 |
char* const base_addr = committed_low_addr(); |
|
286 |
bool result = special() || os::uncommit_memory(base_addr, bytes); |
|
287 |
if (result) { |
|
288 |
_committed_low_addr += bytes; |
|
289 |
} |
|
290 |
||
291 |
return result; |
|
292 |
} |
|
293 |
||
294 |
size_t PSVirtualSpaceHighToLow::expand_into(PSVirtualSpace* other_space, |
|
295 |
size_t bytes) { |
|
296 |
assert(is_aligned(bytes), "arg not aligned"); |
|
297 |
assert(grows_down(), "this space must grow down"); |
|
298 |
assert(other_space->grows_up(), "other space must grow up"); |
|
299 |
assert(reserved_low_addr() == other_space->reserved_high_addr(), |
|
300 |
"spaces not contiguous"); |
|
301 |
assert(special() == other_space->special(), "one space is special in memory, the other is not"); |
|
302 |
DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); |
|
303 |
DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); |
|
304 |
||
305 |
size_t bytes_needed = bytes; |
|
306 |
||
307 |
// First use the uncommitted region in this space. |
|
308 |
size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); |
|
309 |
if (tmp_bytes > 0) { |
|
310 |
if (expand_by(tmp_bytes)) { |
|
311 |
bytes_needed -= tmp_bytes; |
|
312 |
} else { |
|
313 |
return 0; |
|
314 |
} |
|
315 |
} |
|
316 |
||
317 |
// Next take from the uncommitted region in the other space, and commit it. |
|
318 |
tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); |
|
319 |
if (tmp_bytes > 0) { |
|
320 |
char* const commit_base = committed_low_addr() - tmp_bytes; |
|
321 |
if (other_space->special() || |
|
322 |
os::commit_memory(commit_base, tmp_bytes, alignment())) { |
|
323 |
// Reduce the reserved region in the other space. |
|
324 |
other_space->set_reserved(other_space->reserved_low_addr(), |
|
325 |
other_space->reserved_high_addr() - tmp_bytes, |
|
326 |
other_space->special()); |
|
327 |
||
328 |
// Grow both reserved and committed in this space. |
|
329 |
_reserved_low_addr -= tmp_bytes; |
|
330 |
_committed_low_addr -= tmp_bytes; |
|
331 |
bytes_needed -= tmp_bytes; |
|
332 |
} else { |
|
333 |
return bytes - bytes_needed; |
|
334 |
} |
|
335 |
} |
|
336 |
||
337 |
// Finally take from the already committed region in the other space. |
|
338 |
tmp_bytes = bytes_needed; |
|
339 |
if (tmp_bytes > 0) { |
|
340 |
// Reduce both committed and reserved in the other space. |
|
341 |
other_space->set_committed(other_space->committed_low_addr(), |
|
342 |
other_space->committed_high_addr() - tmp_bytes); |
|
343 |
other_space->set_reserved(other_space->reserved_low_addr(), |
|
344 |
other_space->reserved_high_addr() - tmp_bytes, |
|
345 |
other_space->special()); |
|
346 |
||
347 |
// Grow both reserved and committed in this space. |
|
348 |
_reserved_low_addr -= tmp_bytes; |
|
349 |
_committed_low_addr -= tmp_bytes; |
|
350 |
} |
|
351 |
||
352 |
return bytes; |
|
353 |
} |
|
354 |
||
355 |
void |
|
356 |
PSVirtualSpaceHighToLow::print_space_boundaries_on(outputStream* st) const { |
|
357 |
st->print_cr(" (" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT "]", |
|
358 |
high_boundary(), low(), low_boundary()); |
|
359 |
} |