Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/virtualspace.cpp @ 22973:340ca8812af9
8067469: G1 ignores AlwaysPreTouch
Summary: Factor out pretouch code of the various virtual space management classes and use them everywhere including in G1.
Reviewed-by: stefank, ehelin, dholmes
author | tschatzl |
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date | Thu, 18 Dec 2014 09:37:02 +0100 |
parents | 78bbf4d43a14 |
children | c2ce24504334 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 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 "oops/markOop.hpp" | |
27 #include "oops/oop.inline.hpp" | |
28 #include "runtime/virtualspace.hpp" | |
6197 | 29 #include "services/memTracker.hpp" |
1972 | 30 #ifdef TARGET_OS_FAMILY_linux |
31 # include "os_linux.inline.hpp" | |
32 #endif | |
33 #ifdef TARGET_OS_FAMILY_solaris | |
34 # include "os_solaris.inline.hpp" | |
35 #endif | |
36 #ifdef TARGET_OS_FAMILY_windows | |
37 # include "os_windows.inline.hpp" | |
38 #endif | |
14411 | 39 #ifdef TARGET_OS_FAMILY_aix |
40 # include "os_aix.inline.hpp" | |
41 #endif | |
3960 | 42 #ifdef TARGET_OS_FAMILY_bsd |
43 # include "os_bsd.inline.hpp" | |
44 #endif | |
0 | 45 |
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46 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
0 | 47 |
48 // ReservedSpace | |
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49 |
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50 // Dummy constructor |
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51 ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0), |
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52 _alignment(0), _special(false), _executable(false) { |
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53 } |
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54 |
0 | 55 ReservedSpace::ReservedSpace(size_t size) { |
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56 size_t page_size = os::page_size_for_region(size, size, 1); |
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57 bool large_pages = page_size != (size_t)os::vm_page_size(); |
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58 // Don't force the alignment to be large page aligned, |
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59 // since that will waste memory. |
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60 size_t alignment = os::vm_allocation_granularity(); |
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61 initialize(size, alignment, large_pages, NULL, 0, false); |
0 | 62 } |
63 | |
64 ReservedSpace::ReservedSpace(size_t size, size_t alignment, | |
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65 bool large, |
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66 char* requested_address, |
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67 const size_t noaccess_prefix) { |
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68 initialize(size+noaccess_prefix, alignment, large, requested_address, |
656 | 69 noaccess_prefix, false); |
70 } | |
71 | |
72 ReservedSpace::ReservedSpace(size_t size, size_t alignment, | |
73 bool large, | |
74 bool executable) { | |
75 initialize(size, alignment, large, NULL, 0, executable); | |
0 | 76 } |
77 | |
1618 | 78 // Helper method. |
79 static bool failed_to_reserve_as_requested(char* base, char* requested_address, | |
80 const size_t size, bool special) | |
81 { | |
82 if (base == requested_address || requested_address == NULL) | |
83 return false; // did not fail | |
84 | |
85 if (base != NULL) { | |
86 // Different reserve address may be acceptable in other cases | |
87 // but for compressed oops heap should be at requested address. | |
88 assert(UseCompressedOops, "currently requested address used only for compressed oops"); | |
89 if (PrintCompressedOopsMode) { | |
90 tty->cr(); | |
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91 tty->print_cr("Reserved memory not at requested address: " PTR_FORMAT " vs " PTR_FORMAT, base, requested_address); |
1618 | 92 } |
93 // OS ignored requested address. Try different address. | |
94 if (special) { | |
95 if (!os::release_memory_special(base, size)) { | |
96 fatal("os::release_memory_special failed"); | |
97 } | |
98 } else { | |
99 if (!os::release_memory(base, size)) { | |
100 fatal("os::release_memory failed"); | |
101 } | |
102 } | |
103 } | |
104 return true; | |
105 } | |
106 | |
0 | 107 void ReservedSpace::initialize(size_t size, size_t alignment, bool large, |
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108 char* requested_address, |
656 | 109 const size_t noaccess_prefix, |
110 bool executable) { | |
0 | 111 const size_t granularity = os::vm_allocation_granularity(); |
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112 assert((size & (granularity - 1)) == 0, |
0 | 113 "size not aligned to os::vm_allocation_granularity()"); |
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114 assert((alignment & (granularity - 1)) == 0, |
0 | 115 "alignment not aligned to os::vm_allocation_granularity()"); |
116 assert(alignment == 0 || is_power_of_2((intptr_t)alignment), | |
117 "not a power of 2"); | |
118 | |
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119 alignment = MAX2(alignment, (size_t)os::vm_page_size()); |
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120 |
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121 // Assert that if noaccess_prefix is used, it is the same as alignment. |
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122 assert(noaccess_prefix == 0 || |
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123 noaccess_prefix == alignment, "noaccess prefix wrong"); |
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124 |
0 | 125 _base = NULL; |
126 _size = 0; | |
127 _special = false; | |
656 | 128 _executable = executable; |
0 | 129 _alignment = 0; |
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130 _noaccess_prefix = 0; |
0 | 131 if (size == 0) { |
132 return; | |
133 } | |
134 | |
135 // If OS doesn't support demand paging for large page memory, we need | |
136 // to use reserve_memory_special() to reserve and pin the entire region. | |
137 bool special = large && !os::can_commit_large_page_memory(); | |
138 char* base = NULL; | |
139 | |
1618 | 140 if (requested_address != 0) { |
141 requested_address -= noaccess_prefix; // adjust requested address | |
142 assert(requested_address != NULL, "huge noaccess prefix?"); | |
143 } | |
144 | |
0 | 145 if (special) { |
146 | |
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147 base = os::reserve_memory_special(size, alignment, requested_address, executable); |
0 | 148 |
149 if (base != NULL) { | |
1618 | 150 if (failed_to_reserve_as_requested(base, requested_address, size, true)) { |
151 // OS ignored requested address. Try different address. | |
152 return; | |
153 } | |
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154 // Check alignment constraints. |
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155 assert((uintptr_t) base % alignment == 0, |
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156 err_msg("Large pages returned a non-aligned address, base: " |
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157 PTR_FORMAT " alignment: " PTR_FORMAT, |
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158 base, (void*)(uintptr_t)alignment)); |
0 | 159 _special = true; |
160 } else { | |
161 // failed; try to reserve regular memory below | |
1618 | 162 if (UseLargePages && (!FLAG_IS_DEFAULT(UseLargePages) || |
163 !FLAG_IS_DEFAULT(LargePageSizeInBytes))) { | |
164 if (PrintCompressedOopsMode) { | |
165 tty->cr(); | |
166 tty->print_cr("Reserve regular memory without large pages."); | |
167 } | |
168 } | |
0 | 169 } |
170 } | |
171 | |
172 if (base == NULL) { | |
173 // Optimistically assume that the OSes returns an aligned base pointer. | |
174 // When reserving a large address range, most OSes seem to align to at | |
175 // least 64K. | |
176 | |
177 // If the memory was requested at a particular address, use | |
178 // os::attempt_reserve_memory_at() to avoid over mapping something | |
179 // important. If available space is not detected, return NULL. | |
180 | |
181 if (requested_address != 0) { | |
1618 | 182 base = os::attempt_reserve_memory_at(size, requested_address); |
183 if (failed_to_reserve_as_requested(base, requested_address, size, false)) { | |
184 // OS ignored requested address. Try different address. | |
185 base = NULL; | |
186 } | |
0 | 187 } else { |
188 base = os::reserve_memory(size, NULL, alignment); | |
189 } | |
190 | |
191 if (base == NULL) return; | |
192 | |
193 // Check alignment constraints | |
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194 if ((((size_t)base + noaccess_prefix) & (alignment - 1)) != 0) { |
0 | 195 // Base not aligned, retry |
196 if (!os::release_memory(base, size)) fatal("os::release_memory failed"); | |
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197 // Make sure that size is aligned |
0 | 198 size = align_size_up(size, alignment); |
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199 base = os::reserve_memory_aligned(size, alignment); |
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200 |
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201 if (requested_address != 0 && |
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202 failed_to_reserve_as_requested(base, requested_address, size, false)) { |
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203 // As a result of the alignment constraints, the allocated base differs |
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204 // from the requested address. Return back to the caller who can |
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205 // take remedial action (like try again without a requested address). |
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206 assert(_base == NULL, "should be"); |
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207 return; |
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208 } |
0 | 209 } |
210 } | |
211 // Done | |
212 _base = base; | |
213 _size = size; | |
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214 _alignment = alignment; |
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215 _noaccess_prefix = noaccess_prefix; |
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216 |
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217 // Assert that if noaccess_prefix is used, it is the same as alignment. |
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218 assert(noaccess_prefix == 0 || |
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219 noaccess_prefix == _alignment, "noaccess prefix wrong"); |
0 | 220 |
221 assert(markOopDesc::encode_pointer_as_mark(_base)->decode_pointer() == _base, | |
222 "area must be distinguisable from marks for mark-sweep"); | |
223 assert(markOopDesc::encode_pointer_as_mark(&_base[size])->decode_pointer() == &_base[size], | |
224 "area must be distinguisable from marks for mark-sweep"); | |
225 } | |
226 | |
227 | |
228 ReservedSpace::ReservedSpace(char* base, size_t size, size_t alignment, | |
656 | 229 bool special, bool executable) { |
0 | 230 assert((size % os::vm_allocation_granularity()) == 0, |
231 "size not allocation aligned"); | |
232 _base = base; | |
233 _size = size; | |
234 _alignment = alignment; | |
237
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235 _noaccess_prefix = 0; |
0 | 236 _special = special; |
656 | 237 _executable = executable; |
0 | 238 } |
239 | |
240 | |
241 ReservedSpace ReservedSpace::first_part(size_t partition_size, size_t alignment, | |
242 bool split, bool realloc) { | |
243 assert(partition_size <= size(), "partition failed"); | |
244 if (split) { | |
656 | 245 os::split_reserved_memory(base(), size(), partition_size, realloc); |
0 | 246 } |
656 | 247 ReservedSpace result(base(), partition_size, alignment, special(), |
248 executable()); | |
0 | 249 return result; |
250 } | |
251 | |
252 | |
253 ReservedSpace | |
254 ReservedSpace::last_part(size_t partition_size, size_t alignment) { | |
255 assert(partition_size <= size(), "partition failed"); | |
256 ReservedSpace result(base() + partition_size, size() - partition_size, | |
656 | 257 alignment, special(), executable()); |
0 | 258 return result; |
259 } | |
260 | |
261 | |
262 size_t ReservedSpace::page_align_size_up(size_t size) { | |
263 return align_size_up(size, os::vm_page_size()); | |
264 } | |
265 | |
266 | |
267 size_t ReservedSpace::page_align_size_down(size_t size) { | |
268 return align_size_down(size, os::vm_page_size()); | |
269 } | |
270 | |
271 | |
272 size_t ReservedSpace::allocation_align_size_up(size_t size) { | |
273 return align_size_up(size, os::vm_allocation_granularity()); | |
274 } | |
275 | |
276 | |
277 size_t ReservedSpace::allocation_align_size_down(size_t size) { | |
278 return align_size_down(size, os::vm_allocation_granularity()); | |
279 } | |
280 | |
281 | |
282 void ReservedSpace::release() { | |
283 if (is_reserved()) { | |
237
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284 char *real_base = _base - _noaccess_prefix; |
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285 const size_t real_size = _size + _noaccess_prefix; |
0 | 286 if (special()) { |
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287 os::release_memory_special(real_base, real_size); |
0 | 288 } else{ |
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289 os::release_memory(real_base, real_size); |
0 | 290 } |
291 _base = NULL; | |
292 _size = 0; | |
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293 _noaccess_prefix = 0; |
0 | 294 _special = false; |
656 | 295 _executable = false; |
0 | 296 } |
297 } | |
298 | |
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299 void ReservedSpace::protect_noaccess_prefix(const size_t size) { |
1618 | 300 assert( (_noaccess_prefix != 0) == (UseCompressedOops && _base != NULL && |
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301 (Universe::narrow_oop_base() != NULL) && |
1618 | 302 Universe::narrow_oop_use_implicit_null_checks()), |
303 "noaccess_prefix should be used only with non zero based compressed oops"); | |
304 | |
305 // If there is no noaccess prefix, return. | |
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306 if (_noaccess_prefix == 0) return; |
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307 |
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308 assert(_noaccess_prefix >= (size_t)os::vm_page_size(), |
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309 "must be at least page size big"); |
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310 |
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311 // Protect memory at the base of the allocated region. |
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312 // If special, the page was committed (only matters on windows) |
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313 if (!os::protect_memory(_base, _noaccess_prefix, os::MEM_PROT_NONE, |
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314 _special)) { |
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315 fatal("cannot protect protection page"); |
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316 } |
1618 | 317 if (PrintCompressedOopsMode) { |
318 tty->cr(); | |
319 tty->print_cr("Protected page at the reserved heap base: " PTR_FORMAT " / " INTX_FORMAT " bytes", _base, _noaccess_prefix); | |
320 } | |
237
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321 |
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322 _base += _noaccess_prefix; |
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323 _size -= _noaccess_prefix; |
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324 assert((size == _size) && ((uintptr_t)_base % _alignment == 0), |
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325 "must be exactly of required size and alignment"); |
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326 } |
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327 |
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328 ReservedHeapSpace::ReservedHeapSpace(size_t size, size_t alignment, |
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329 bool large, char* requested_address) : |
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330 ReservedSpace(size, alignment, large, |
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331 requested_address, |
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332 (UseCompressedOops && (Universe::narrow_oop_base() != NULL) && |
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333 Universe::narrow_oop_use_implicit_null_checks()) ? |
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334 lcm(os::vm_page_size(), alignment) : 0) { |
6197 | 335 if (base() > 0) { |
336 MemTracker::record_virtual_memory_type((address)base(), mtJavaHeap); | |
337 } | |
338 | |
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339 // Only reserved space for the java heap should have a noaccess_prefix |
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340 // if using compressed oops. |
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341 protect_noaccess_prefix(size); |
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342 } |
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343 |
656 | 344 // Reserve space for code segment. Same as Java heap only we mark this as |
345 // executable. | |
346 ReservedCodeSpace::ReservedCodeSpace(size_t r_size, | |
347 size_t rs_align, | |
348 bool large) : | |
349 ReservedSpace(r_size, rs_align, large, /*executable*/ true) { | |
6197 | 350 MemTracker::record_virtual_memory_type((address)base(), mtCode); |
656 | 351 } |
352 | |
0 | 353 // VirtualSpace |
354 | |
355 VirtualSpace::VirtualSpace() { | |
356 _low_boundary = NULL; | |
357 _high_boundary = NULL; | |
358 _low = NULL; | |
359 _high = NULL; | |
360 _lower_high = NULL; | |
361 _middle_high = NULL; | |
362 _upper_high = NULL; | |
363 _lower_high_boundary = NULL; | |
364 _middle_high_boundary = NULL; | |
365 _upper_high_boundary = NULL; | |
366 _lower_alignment = 0; | |
367 _middle_alignment = 0; | |
368 _upper_alignment = 0; | |
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369 _special = false; |
656 | 370 _executable = false; |
0 | 371 } |
372 | |
373 | |
374 bool VirtualSpace::initialize(ReservedSpace rs, size_t committed_size) { | |
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375 const size_t max_commit_granularity = os::page_size_for_region(rs.size(), rs.size(), 1); |
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376 return initialize_with_granularity(rs, committed_size, max_commit_granularity); |
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377 } |
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378 |
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379 bool VirtualSpace::initialize_with_granularity(ReservedSpace rs, size_t committed_size, size_t max_commit_granularity) { |
0 | 380 if(!rs.is_reserved()) return false; // allocation failed. |
381 assert(_low_boundary == NULL, "VirtualSpace already initialized"); | |
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382 assert(max_commit_granularity > 0, "Granularity must be non-zero."); |
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383 |
0 | 384 _low_boundary = rs.base(); |
385 _high_boundary = low_boundary() + rs.size(); | |
386 | |
387 _low = low_boundary(); | |
388 _high = low(); | |
389 | |
390 _special = rs.special(); | |
656 | 391 _executable = rs.executable(); |
0 | 392 |
393 // When a VirtualSpace begins life at a large size, make all future expansion | |
394 // and shrinking occur aligned to a granularity of large pages. This avoids | |
395 // fragmentation of physical addresses that inhibits the use of large pages | |
396 // by the OS virtual memory system. Empirically, we see that with a 4MB | |
397 // page size, the only spaces that get handled this way are codecache and | |
398 // the heap itself, both of which provide a substantial performance | |
399 // boost in many benchmarks when covered by large pages. | |
400 // | |
401 // No attempt is made to force large page alignment at the very top and | |
402 // bottom of the space if they are not aligned so already. | |
403 _lower_alignment = os::vm_page_size(); | |
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404 _middle_alignment = max_commit_granularity; |
0 | 405 _upper_alignment = os::vm_page_size(); |
406 | |
407 // End of each region | |
408 _lower_high_boundary = (char*) round_to((intptr_t) low_boundary(), middle_alignment()); | |
409 _middle_high_boundary = (char*) round_down((intptr_t) high_boundary(), middle_alignment()); | |
410 _upper_high_boundary = high_boundary(); | |
411 | |
412 // High address of each region | |
413 _lower_high = low_boundary(); | |
414 _middle_high = lower_high_boundary(); | |
415 _upper_high = middle_high_boundary(); | |
416 | |
417 // commit to initial size | |
418 if (committed_size > 0) { | |
419 if (!expand_by(committed_size)) { | |
420 return false; | |
421 } | |
422 } | |
423 return true; | |
424 } | |
425 | |
426 | |
427 VirtualSpace::~VirtualSpace() { | |
428 release(); | |
429 } | |
430 | |
431 | |
432 void VirtualSpace::release() { | |
237
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433 // This does not release memory it never reserved. |
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434 // Caller must release via rs.release(); |
0 | 435 _low_boundary = NULL; |
436 _high_boundary = NULL; | |
437 _low = NULL; | |
438 _high = NULL; | |
439 _lower_high = NULL; | |
440 _middle_high = NULL; | |
441 _upper_high = NULL; | |
442 _lower_high_boundary = NULL; | |
443 _middle_high_boundary = NULL; | |
444 _upper_high_boundary = NULL; | |
445 _lower_alignment = 0; | |
446 _middle_alignment = 0; | |
447 _upper_alignment = 0; | |
448 _special = false; | |
656 | 449 _executable = false; |
0 | 450 } |
451 | |
452 | |
453 size_t VirtualSpace::committed_size() const { | |
454 return pointer_delta(high(), low(), sizeof(char)); | |
455 } | |
456 | |
457 | |
458 size_t VirtualSpace::reserved_size() const { | |
459 return pointer_delta(high_boundary(), low_boundary(), sizeof(char)); | |
460 } | |
461 | |
462 | |
463 size_t VirtualSpace::uncommitted_size() const { | |
464 return reserved_size() - committed_size(); | |
465 } | |
466 | |
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467 size_t VirtualSpace::actual_committed_size() const { |
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468 // Special VirtualSpaces commit all reserved space up front. |
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469 if (special()) { |
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470 return reserved_size(); |
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471 } |
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472 |
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473 size_t committed_low = pointer_delta(_lower_high, _low_boundary, sizeof(char)); |
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474 size_t committed_middle = pointer_delta(_middle_high, _lower_high_boundary, sizeof(char)); |
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475 size_t committed_high = pointer_delta(_upper_high, _middle_high_boundary, sizeof(char)); |
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476 |
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477 #ifdef ASSERT |
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478 size_t lower = pointer_delta(_lower_high_boundary, _low_boundary, sizeof(char)); |
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479 size_t middle = pointer_delta(_middle_high_boundary, _lower_high_boundary, sizeof(char)); |
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480 size_t upper = pointer_delta(_upper_high_boundary, _middle_high_boundary, sizeof(char)); |
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481 |
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482 if (committed_high > 0) { |
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483 assert(committed_low == lower, "Must be"); |
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484 assert(committed_middle == middle, "Must be"); |
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485 } |
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486 |
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487 if (committed_middle > 0) { |
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488 assert(committed_low == lower, "Must be"); |
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489 } |
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490 if (committed_middle < middle) { |
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491 assert(committed_high == 0, "Must be"); |
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492 } |
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493 |
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494 if (committed_low < lower) { |
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495 assert(committed_high == 0, "Must be"); |
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496 assert(committed_middle == 0, "Must be"); |
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497 } |
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498 #endif |
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499 |
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500 return committed_low + committed_middle + committed_high; |
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501 } |
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502 |
0 | 503 |
504 bool VirtualSpace::contains(const void* p) const { | |
505 return low() <= (const char*) p && (const char*) p < high(); | |
506 } | |
507 | |
508 /* | |
509 First we need to determine if a particular virtual space is using large | |
510 pages. This is done at the initialize function and only virtual spaces | |
511 that are larger than LargePageSizeInBytes use large pages. Once we | |
512 have determined this, all expand_by and shrink_by calls must grow and | |
513 shrink by large page size chunks. If a particular request | |
514 is within the current large page, the call to commit and uncommit memory | |
515 can be ignored. In the case that the low and high boundaries of this | |
516 space is not large page aligned, the pages leading to the first large | |
517 page address and the pages after the last large page address must be | |
518 allocated with default pages. | |
519 */ | |
520 bool VirtualSpace::expand_by(size_t bytes, bool pre_touch) { | |
521 if (uncommitted_size() < bytes) return false; | |
522 | |
523 if (special()) { | |
524 // don't commit memory if the entire space is pinned in memory | |
525 _high += bytes; | |
526 return true; | |
527 } | |
528 | |
529 char* previous_high = high(); | |
530 char* unaligned_new_high = high() + bytes; | |
531 assert(unaligned_new_high <= high_boundary(), | |
532 "cannot expand by more than upper boundary"); | |
533 | |
534 // Calculate where the new high for each of the regions should be. If | |
535 // the low_boundary() and high_boundary() are LargePageSizeInBytes aligned | |
536 // then the unaligned lower and upper new highs would be the | |
537 // lower_high() and upper_high() respectively. | |
538 char* unaligned_lower_new_high = | |
539 MIN2(unaligned_new_high, lower_high_boundary()); | |
540 char* unaligned_middle_new_high = | |
541 MIN2(unaligned_new_high, middle_high_boundary()); | |
542 char* unaligned_upper_new_high = | |
543 MIN2(unaligned_new_high, upper_high_boundary()); | |
544 | |
545 // Align the new highs based on the regions alignment. lower and upper | |
546 // alignment will always be default page size. middle alignment will be | |
547 // LargePageSizeInBytes if the actual size of the virtual space is in | |
548 // fact larger than LargePageSizeInBytes. | |
549 char* aligned_lower_new_high = | |
550 (char*) round_to((intptr_t) unaligned_lower_new_high, lower_alignment()); | |
551 char* aligned_middle_new_high = | |
552 (char*) round_to((intptr_t) unaligned_middle_new_high, middle_alignment()); | |
553 char* aligned_upper_new_high = | |
554 (char*) round_to((intptr_t) unaligned_upper_new_high, upper_alignment()); | |
555 | |
556 // Determine which regions need to grow in this expand_by call. | |
557 // If you are growing in the lower region, high() must be in that | |
558 // region so calcuate the size based on high(). For the middle and | |
559 // upper regions, determine the starting point of growth based on the | |
560 // location of high(). By getting the MAX of the region's low address | |
561 // (or the prevoius region's high address) and high(), we can tell if it | |
562 // is an intra or inter region growth. | |
563 size_t lower_needs = 0; | |
564 if (aligned_lower_new_high > lower_high()) { | |
565 lower_needs = | |
566 pointer_delta(aligned_lower_new_high, lower_high(), sizeof(char)); | |
567 } | |
568 size_t middle_needs = 0; | |
569 if (aligned_middle_new_high > middle_high()) { | |
570 middle_needs = | |
571 pointer_delta(aligned_middle_new_high, middle_high(), sizeof(char)); | |
572 } | |
573 size_t upper_needs = 0; | |
574 if (aligned_upper_new_high > upper_high()) { | |
575 upper_needs = | |
576 pointer_delta(aligned_upper_new_high, upper_high(), sizeof(char)); | |
577 } | |
578 | |
579 // Check contiguity. | |
580 assert(low_boundary() <= lower_high() && | |
581 lower_high() <= lower_high_boundary(), | |
582 "high address must be contained within the region"); | |
583 assert(lower_high_boundary() <= middle_high() && | |
584 middle_high() <= middle_high_boundary(), | |
585 "high address must be contained within the region"); | |
586 assert(middle_high_boundary() <= upper_high() && | |
587 upper_high() <= upper_high_boundary(), | |
588 "high address must be contained within the region"); | |
589 | |
590 // Commit regions | |
591 if (lower_needs > 0) { | |
592 assert(low_boundary() <= lower_high() && | |
593 lower_high() + lower_needs <= lower_high_boundary(), | |
594 "must not expand beyond region"); | |
656 | 595 if (!os::commit_memory(lower_high(), lower_needs, _executable)) { |
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596 debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
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597 ", lower_needs=" SIZE_FORMAT ", %d) failed", |
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598 lower_high(), lower_needs, _executable);) |
0 | 599 return false; |
600 } else { | |
601 _lower_high += lower_needs; | |
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602 } |
0 | 603 } |
604 if (middle_needs > 0) { | |
605 assert(lower_high_boundary() <= middle_high() && | |
606 middle_high() + middle_needs <= middle_high_boundary(), | |
607 "must not expand beyond region"); | |
656 | 608 if (!os::commit_memory(middle_high(), middle_needs, middle_alignment(), |
609 _executable)) { | |
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610 debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
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611 ", middle_needs=" SIZE_FORMAT ", " SIZE_FORMAT |
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612 ", %d) failed", middle_high(), middle_needs, |
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613 middle_alignment(), _executable);) |
0 | 614 return false; |
615 } | |
616 _middle_high += middle_needs; | |
617 } | |
618 if (upper_needs > 0) { | |
619 assert(middle_high_boundary() <= upper_high() && | |
620 upper_high() + upper_needs <= upper_high_boundary(), | |
621 "must not expand beyond region"); | |
656 | 622 if (!os::commit_memory(upper_high(), upper_needs, _executable)) { |
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623 debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
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624 ", upper_needs=" SIZE_FORMAT ", %d) failed", |
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625 upper_high(), upper_needs, _executable);) |
0 | 626 return false; |
627 } else { | |
628 _upper_high += upper_needs; | |
629 } | |
630 } | |
631 | |
632 if (pre_touch || AlwaysPreTouch) { | |
22973 | 633 os::pretouch_memory(previous_high, unaligned_new_high); |
0 | 634 } |
635 | |
636 _high += bytes; | |
637 return true; | |
638 } | |
639 | |
640 // A page is uncommitted if the contents of the entire page is deemed unusable. | |
641 // Continue to decrement the high() pointer until it reaches a page boundary | |
642 // in which case that particular page can now be uncommitted. | |
643 void VirtualSpace::shrink_by(size_t size) { | |
644 if (committed_size() < size) | |
645 fatal("Cannot shrink virtual space to negative size"); | |
646 | |
647 if (special()) { | |
648 // don't uncommit if the entire space is pinned in memory | |
649 _high -= size; | |
650 return; | |
651 } | |
652 | |
653 char* unaligned_new_high = high() - size; | |
654 assert(unaligned_new_high >= low_boundary(), "cannot shrink past lower boundary"); | |
655 | |
656 // Calculate new unaligned address | |
657 char* unaligned_upper_new_high = | |
658 MAX2(unaligned_new_high, middle_high_boundary()); | |
659 char* unaligned_middle_new_high = | |
660 MAX2(unaligned_new_high, lower_high_boundary()); | |
661 char* unaligned_lower_new_high = | |
662 MAX2(unaligned_new_high, low_boundary()); | |
663 | |
664 // Align address to region's alignment | |
665 char* aligned_upper_new_high = | |
666 (char*) round_to((intptr_t) unaligned_upper_new_high, upper_alignment()); | |
667 char* aligned_middle_new_high = | |
668 (char*) round_to((intptr_t) unaligned_middle_new_high, middle_alignment()); | |
669 char* aligned_lower_new_high = | |
670 (char*) round_to((intptr_t) unaligned_lower_new_high, lower_alignment()); | |
671 | |
672 // Determine which regions need to shrink | |
673 size_t upper_needs = 0; | |
674 if (aligned_upper_new_high < upper_high()) { | |
675 upper_needs = | |
676 pointer_delta(upper_high(), aligned_upper_new_high, sizeof(char)); | |
677 } | |
678 size_t middle_needs = 0; | |
679 if (aligned_middle_new_high < middle_high()) { | |
680 middle_needs = | |
681 pointer_delta(middle_high(), aligned_middle_new_high, sizeof(char)); | |
682 } | |
683 size_t lower_needs = 0; | |
684 if (aligned_lower_new_high < lower_high()) { | |
685 lower_needs = | |
686 pointer_delta(lower_high(), aligned_lower_new_high, sizeof(char)); | |
687 } | |
688 | |
689 // Check contiguity. | |
690 assert(middle_high_boundary() <= upper_high() && | |
691 upper_high() <= upper_high_boundary(), | |
692 "high address must be contained within the region"); | |
693 assert(lower_high_boundary() <= middle_high() && | |
694 middle_high() <= middle_high_boundary(), | |
695 "high address must be contained within the region"); | |
696 assert(low_boundary() <= lower_high() && | |
697 lower_high() <= lower_high_boundary(), | |
698 "high address must be contained within the region"); | |
699 | |
700 // Uncommit | |
701 if (upper_needs > 0) { | |
702 assert(middle_high_boundary() <= aligned_upper_new_high && | |
703 aligned_upper_new_high + upper_needs <= upper_high_boundary(), | |
704 "must not shrink beyond region"); | |
705 if (!os::uncommit_memory(aligned_upper_new_high, upper_needs)) { | |
706 debug_only(warning("os::uncommit_memory failed")); | |
707 return; | |
708 } else { | |
709 _upper_high -= upper_needs; | |
710 } | |
711 } | |
712 if (middle_needs > 0) { | |
713 assert(lower_high_boundary() <= aligned_middle_new_high && | |
714 aligned_middle_new_high + middle_needs <= middle_high_boundary(), | |
715 "must not shrink beyond region"); | |
716 if (!os::uncommit_memory(aligned_middle_new_high, middle_needs)) { | |
717 debug_only(warning("os::uncommit_memory failed")); | |
718 return; | |
719 } else { | |
720 _middle_high -= middle_needs; | |
721 } | |
722 } | |
723 if (lower_needs > 0) { | |
724 assert(low_boundary() <= aligned_lower_new_high && | |
725 aligned_lower_new_high + lower_needs <= lower_high_boundary(), | |
726 "must not shrink beyond region"); | |
727 if (!os::uncommit_memory(aligned_lower_new_high, lower_needs)) { | |
728 debug_only(warning("os::uncommit_memory failed")); | |
729 return; | |
730 } else { | |
731 _lower_high -= lower_needs; | |
732 } | |
733 } | |
734 | |
735 _high -= size; | |
736 } | |
737 | |
738 #ifndef PRODUCT | |
739 void VirtualSpace::check_for_contiguity() { | |
740 // Check contiguity. | |
741 assert(low_boundary() <= lower_high() && | |
742 lower_high() <= lower_high_boundary(), | |
743 "high address must be contained within the region"); | |
744 assert(lower_high_boundary() <= middle_high() && | |
745 middle_high() <= middle_high_boundary(), | |
746 "high address must be contained within the region"); | |
747 assert(middle_high_boundary() <= upper_high() && | |
748 upper_high() <= upper_high_boundary(), | |
749 "high address must be contained within the region"); | |
750 assert(low() >= low_boundary(), "low"); | |
751 assert(low_boundary() <= lower_high_boundary(), "lower high boundary"); | |
752 assert(upper_high_boundary() <= high_boundary(), "upper high boundary"); | |
753 assert(high() <= upper_high(), "upper high"); | |
754 } | |
755 | |
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756 void VirtualSpace::print_on(outputStream* out) { |
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757 out->print ("Virtual space:"); |
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758 if (special()) out->print(" (pinned in memory)"); |
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759 out->cr(); |
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760 out->print_cr(" - committed: " SIZE_FORMAT, committed_size()); |
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761 out->print_cr(" - reserved: " SIZE_FORMAT, reserved_size()); |
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762 out->print_cr(" - [low, high]: [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", low(), high()); |
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763 out->print_cr(" - [low_b, high_b]: [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", low_boundary(), high_boundary()); |
0 | 764 } |
765 | |
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766 void VirtualSpace::print() { |
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767 print_on(tty); |
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768 } |
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769 |
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770 /////////////// Unit tests /////////////// |
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771 |
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772 #ifndef PRODUCT |
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773 |
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774 #define test_log(...) \ |
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775 do {\ |
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776 if (VerboseInternalVMTests) { \ |
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777 tty->print_cr(__VA_ARGS__); \ |
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778 tty->flush(); \ |
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779 }\ |
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780 } while (false) |
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781 |
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782 class TestReservedSpace : AllStatic { |
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783 public: |
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784 static void small_page_write(void* addr, size_t size) { |
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785 size_t page_size = os::vm_page_size(); |
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786 |
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787 char* end = (char*)addr + size; |
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788 for (char* p = (char*)addr; p < end; p += page_size) { |
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789 *p = 1; |
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790 } |
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791 } |
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792 |
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793 static void release_memory_for_test(ReservedSpace rs) { |
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794 if (rs.special()) { |
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795 guarantee(os::release_memory_special(rs.base(), rs.size()), "Shouldn't fail"); |
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796 } else { |
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797 guarantee(os::release_memory(rs.base(), rs.size()), "Shouldn't fail"); |
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798 } |
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799 } |
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800 |
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801 static void test_reserved_space1(size_t size, size_t alignment) { |
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802 test_log("test_reserved_space1(%p)", (void*) (uintptr_t) size); |
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803 |
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804 assert(is_size_aligned(size, alignment), "Incorrect input parameters"); |
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805 |
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806 ReservedSpace rs(size, // size |
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807 alignment, // alignment |
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808 UseLargePages, // large |
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809 NULL, // requested_address |
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810 0); // noacces_prefix |
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811 |
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812 test_log(" rs.special() == %d", rs.special()); |
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813 |
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814 assert(rs.base() != NULL, "Must be"); |
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815 assert(rs.size() == size, "Must be"); |
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816 |
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817 assert(is_ptr_aligned(rs.base(), alignment), "aligned sizes should always give aligned addresses"); |
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818 assert(is_size_aligned(rs.size(), alignment), "aligned sizes should always give aligned addresses"); |
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819 |
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820 if (rs.special()) { |
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821 small_page_write(rs.base(), size); |
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822 } |
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823 |
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824 release_memory_for_test(rs); |
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825 } |
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826 |
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827 static void test_reserved_space2(size_t size) { |
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828 test_log("test_reserved_space2(%p)", (void*)(uintptr_t)size); |
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829 |
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830 assert(is_size_aligned(size, os::vm_allocation_granularity()), "Must be at least AG aligned"); |
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831 |
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832 ReservedSpace rs(size); |
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833 |
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834 test_log(" rs.special() == %d", rs.special()); |
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835 |
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836 assert(rs.base() != NULL, "Must be"); |
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837 assert(rs.size() == size, "Must be"); |
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838 |
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839 if (rs.special()) { |
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840 small_page_write(rs.base(), size); |
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841 } |
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842 |
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843 release_memory_for_test(rs); |
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844 } |
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845 |
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846 static void test_reserved_space3(size_t size, size_t alignment, bool maybe_large) { |
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847 test_log("test_reserved_space3(%p, %p, %d)", |
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848 (void*)(uintptr_t)size, (void*)(uintptr_t)alignment, maybe_large); |
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849 |
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850 assert(is_size_aligned(size, os::vm_allocation_granularity()), "Must be at least AG aligned"); |
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851 assert(is_size_aligned(size, alignment), "Must be at least aligned against alignment"); |
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852 |
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853 bool large = maybe_large && UseLargePages && size >= os::large_page_size(); |
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854 |
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855 ReservedSpace rs(size, alignment, large, false); |
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856 |
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857 test_log(" rs.special() == %d", rs.special()); |
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858 |
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859 assert(rs.base() != NULL, "Must be"); |
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860 assert(rs.size() == size, "Must be"); |
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861 |
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862 if (rs.special()) { |
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863 small_page_write(rs.base(), size); |
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864 } |
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865 |
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866 release_memory_for_test(rs); |
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867 } |
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868 |
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869 |
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870 static void test_reserved_space1() { |
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871 size_t size = 2 * 1024 * 1024; |
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872 size_t ag = os::vm_allocation_granularity(); |
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873 |
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874 test_reserved_space1(size, ag); |
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875 test_reserved_space1(size * 2, ag); |
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876 test_reserved_space1(size * 10, ag); |
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877 } |
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|
878 |
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879 static void test_reserved_space2() { |
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880 size_t size = 2 * 1024 * 1024; |
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881 size_t ag = os::vm_allocation_granularity(); |
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882 |
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883 test_reserved_space2(size * 1); |
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|
884 test_reserved_space2(size * 2); |
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885 test_reserved_space2(size * 10); |
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|
886 test_reserved_space2(ag); |
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887 test_reserved_space2(size - ag); |
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|
888 test_reserved_space2(size); |
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|
889 test_reserved_space2(size + ag); |
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|
890 test_reserved_space2(size * 2); |
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|
891 test_reserved_space2(size * 2 - ag); |
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892 test_reserved_space2(size * 2 + ag); |
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893 test_reserved_space2(size * 3); |
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894 test_reserved_space2(size * 3 - ag); |
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|
895 test_reserved_space2(size * 3 + ag); |
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|
896 test_reserved_space2(size * 10); |
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|
897 test_reserved_space2(size * 10 + size / 2); |
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|
898 } |
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|
899 |
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|
900 static void test_reserved_space3() { |
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|
901 size_t ag = os::vm_allocation_granularity(); |
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|
902 |
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|
903 test_reserved_space3(ag, ag , false); |
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|
904 test_reserved_space3(ag * 2, ag , false); |
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|
905 test_reserved_space3(ag * 3, ag , false); |
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|
906 test_reserved_space3(ag * 2, ag * 2, false); |
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907 test_reserved_space3(ag * 4, ag * 2, false); |
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908 test_reserved_space3(ag * 8, ag * 2, false); |
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909 test_reserved_space3(ag * 4, ag * 4, false); |
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|
910 test_reserved_space3(ag * 8, ag * 4, false); |
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|
911 test_reserved_space3(ag * 16, ag * 4, false); |
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|
912 |
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|
913 if (UseLargePages) { |
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|
914 size_t lp = os::large_page_size(); |
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|
915 |
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|
916 // Without large pages |
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|
917 test_reserved_space3(lp, ag * 4, false); |
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918 test_reserved_space3(lp * 2, ag * 4, false); |
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|
919 test_reserved_space3(lp * 4, ag * 4, false); |
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920 test_reserved_space3(lp, lp , false); |
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921 test_reserved_space3(lp * 2, lp , false); |
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922 test_reserved_space3(lp * 3, lp , false); |
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923 test_reserved_space3(lp * 2, lp * 2, false); |
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924 test_reserved_space3(lp * 4, lp * 2, false); |
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925 test_reserved_space3(lp * 8, lp * 2, false); |
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|
926 |
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|
927 // With large pages |
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|
928 test_reserved_space3(lp, ag * 4 , true); |
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929 test_reserved_space3(lp * 2, ag * 4, true); |
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930 test_reserved_space3(lp * 4, ag * 4, true); |
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931 test_reserved_space3(lp, lp , true); |
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932 test_reserved_space3(lp * 2, lp , true); |
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933 test_reserved_space3(lp * 3, lp , true); |
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934 test_reserved_space3(lp * 2, lp * 2, true); |
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935 test_reserved_space3(lp * 4, lp * 2, true); |
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936 test_reserved_space3(lp * 8, lp * 2, true); |
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937 } |
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|
938 } |
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|
939 |
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940 static void test_reserved_space() { |
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|
941 test_reserved_space1(); |
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|
942 test_reserved_space2(); |
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|
943 test_reserved_space3(); |
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|
944 } |
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|
945 }; |
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|
946 |
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|
947 void TestReservedSpace_test() { |
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948 TestReservedSpace::test_reserved_space(); |
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|
949 } |
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950 |
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951 #define assert_equals(actual, expected) \ |
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952 assert(actual == expected, \ |
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953 err_msg("Got " SIZE_FORMAT " expected " \ |
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954 SIZE_FORMAT, actual, expected)); |
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955 |
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956 #define assert_ge(value1, value2) \ |
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957 assert(value1 >= value2, \ |
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958 err_msg("'" #value1 "': " SIZE_FORMAT " '" \ |
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959 #value2 "': " SIZE_FORMAT, value1, value2)); |
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960 |
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961 #define assert_lt(value1, value2) \ |
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962 assert(value1 < value2, \ |
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963 err_msg("'" #value1 "': " SIZE_FORMAT " '" \ |
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964 #value2 "': " SIZE_FORMAT, value1, value2)); |
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965 |
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966 |
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967 class TestVirtualSpace : AllStatic { |
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968 enum TestLargePages { |
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969 Default, |
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|
970 Disable, |
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|
971 Reserve, |
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|
972 Commit |
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973 }; |
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974 |
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975 static ReservedSpace reserve_memory(size_t reserve_size_aligned, TestLargePages mode) { |
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976 switch(mode) { |
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977 default: |
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978 case Default: |
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979 case Reserve: |
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980 return ReservedSpace(reserve_size_aligned); |
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981 case Disable: |
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982 case Commit: |
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983 return ReservedSpace(reserve_size_aligned, |
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984 os::vm_allocation_granularity(), |
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985 /* large */ false, /* exec */ false); |
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986 } |
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987 } |
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988 |
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989 static bool initialize_virtual_space(VirtualSpace& vs, ReservedSpace rs, TestLargePages mode) { |
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990 switch(mode) { |
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991 default: |
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992 case Default: |
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993 case Reserve: |
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994 return vs.initialize(rs, 0); |
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995 case Disable: |
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996 return vs.initialize_with_granularity(rs, 0, os::vm_page_size()); |
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997 case Commit: |
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998 return vs.initialize_with_granularity(rs, 0, os::page_size_for_region(rs.size(), rs.size(), 1)); |
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999 } |
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1000 } |
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1001 |
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1002 public: |
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1003 static void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size, |
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1004 TestLargePages mode = Default) { |
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1005 size_t granularity = os::vm_allocation_granularity(); |
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1006 size_t reserve_size_aligned = align_size_up(reserve_size, granularity); |
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1007 |
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1008 ReservedSpace reserved = reserve_memory(reserve_size_aligned, mode); |
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1009 |
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1010 assert(reserved.is_reserved(), "Must be"); |
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1011 |
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1012 VirtualSpace vs; |
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1013 bool initialized = initialize_virtual_space(vs, reserved, mode); |
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1014 assert(initialized, "Failed to initialize VirtualSpace"); |
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1015 |
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1016 vs.expand_by(commit_size, false); |
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1017 |
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1018 if (vs.special()) { |
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1019 assert_equals(vs.actual_committed_size(), reserve_size_aligned); |
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1020 } else { |
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1021 assert_ge(vs.actual_committed_size(), commit_size); |
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1022 // Approximate the commit granularity. |
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1023 // Make sure that we don't commit using large pages |
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1024 // if large pages has been disabled for this VirtualSpace. |
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1025 size_t commit_granularity = (mode == Disable || !UseLargePages) ? |
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1026 os::vm_page_size() : os::large_page_size(); |
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1027 assert_lt(vs.actual_committed_size(), commit_size + commit_granularity); |
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1028 } |
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1029 |
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1030 reserved.release(); |
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1031 } |
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1032 |
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1033 static void test_virtual_space_actual_committed_space_one_large_page() { |
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1034 if (!UseLargePages) { |
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1035 return; |
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1036 } |
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1037 |
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1038 size_t large_page_size = os::large_page_size(); |
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1039 |
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1040 ReservedSpace reserved(large_page_size, large_page_size, true, false); |
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1041 |
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1042 assert(reserved.is_reserved(), "Must be"); |
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1043 |
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1044 VirtualSpace vs; |
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1045 bool initialized = vs.initialize(reserved, 0); |
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1046 assert(initialized, "Failed to initialize VirtualSpace"); |
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1047 |
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1048 vs.expand_by(large_page_size, false); |
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1049 |
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1050 assert_equals(vs.actual_committed_size(), large_page_size); |
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1051 |
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1052 reserved.release(); |
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1053 } |
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1054 |
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1055 static void test_virtual_space_actual_committed_space() { |
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1056 test_virtual_space_actual_committed_space(4 * K, 0); |
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1057 test_virtual_space_actual_committed_space(4 * K, 4 * K); |
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1058 test_virtual_space_actual_committed_space(8 * K, 0); |
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1059 test_virtual_space_actual_committed_space(8 * K, 4 * K); |
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1060 test_virtual_space_actual_committed_space(8 * K, 8 * K); |
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1061 test_virtual_space_actual_committed_space(12 * K, 0); |
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1062 test_virtual_space_actual_committed_space(12 * K, 4 * K); |
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1063 test_virtual_space_actual_committed_space(12 * K, 8 * K); |
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1064 test_virtual_space_actual_committed_space(12 * K, 12 * K); |
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1065 test_virtual_space_actual_committed_space(64 * K, 0); |
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1066 test_virtual_space_actual_committed_space(64 * K, 32 * K); |
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1067 test_virtual_space_actual_committed_space(64 * K, 64 * K); |
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1068 test_virtual_space_actual_committed_space(2 * M, 0); |
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1069 test_virtual_space_actual_committed_space(2 * M, 4 * K); |
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1070 test_virtual_space_actual_committed_space(2 * M, 64 * K); |
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1071 test_virtual_space_actual_committed_space(2 * M, 1 * M); |
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1072 test_virtual_space_actual_committed_space(2 * M, 2 * M); |
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1073 test_virtual_space_actual_committed_space(10 * M, 0); |
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1074 test_virtual_space_actual_committed_space(10 * M, 4 * K); |
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1075 test_virtual_space_actual_committed_space(10 * M, 8 * K); |
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1076 test_virtual_space_actual_committed_space(10 * M, 1 * M); |
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1077 test_virtual_space_actual_committed_space(10 * M, 2 * M); |
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1078 test_virtual_space_actual_committed_space(10 * M, 5 * M); |
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1079 test_virtual_space_actual_committed_space(10 * M, 10 * M); |
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1080 } |
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1081 |
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1082 static void test_virtual_space_disable_large_pages() { |
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1083 if (!UseLargePages) { |
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1084 return; |
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1085 } |
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1086 // These test cases verify that if we force VirtualSpace to disable large pages |
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1087 test_virtual_space_actual_committed_space(10 * M, 0, Disable); |
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1088 test_virtual_space_actual_committed_space(10 * M, 4 * K, Disable); |
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1089 test_virtual_space_actual_committed_space(10 * M, 8 * K, Disable); |
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1090 test_virtual_space_actual_committed_space(10 * M, 1 * M, Disable); |
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1091 test_virtual_space_actual_committed_space(10 * M, 2 * M, Disable); |
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1092 test_virtual_space_actual_committed_space(10 * M, 5 * M, Disable); |
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1093 test_virtual_space_actual_committed_space(10 * M, 10 * M, Disable); |
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1094 |
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1095 test_virtual_space_actual_committed_space(10 * M, 0, Reserve); |
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1096 test_virtual_space_actual_committed_space(10 * M, 4 * K, Reserve); |
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1097 test_virtual_space_actual_committed_space(10 * M, 8 * K, Reserve); |
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1098 test_virtual_space_actual_committed_space(10 * M, 1 * M, Reserve); |
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1099 test_virtual_space_actual_committed_space(10 * M, 2 * M, Reserve); |
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1100 test_virtual_space_actual_committed_space(10 * M, 5 * M, Reserve); |
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1101 test_virtual_space_actual_committed_space(10 * M, 10 * M, Reserve); |
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1102 |
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1103 test_virtual_space_actual_committed_space(10 * M, 0, Commit); |
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1104 test_virtual_space_actual_committed_space(10 * M, 4 * K, Commit); |
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1105 test_virtual_space_actual_committed_space(10 * M, 8 * K, Commit); |
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1106 test_virtual_space_actual_committed_space(10 * M, 1 * M, Commit); |
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1107 test_virtual_space_actual_committed_space(10 * M, 2 * M, Commit); |
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1108 test_virtual_space_actual_committed_space(10 * M, 5 * M, Commit); |
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1109 test_virtual_space_actual_committed_space(10 * M, 10 * M, Commit); |
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1110 } |
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1111 |
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1112 static void test_virtual_space() { |
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1113 test_virtual_space_actual_committed_space(); |
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1114 test_virtual_space_actual_committed_space_one_large_page(); |
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1115 test_virtual_space_disable_large_pages(); |
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1116 } |
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1117 }; |
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1118 |
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1119 void TestVirtualSpace_test() { |
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1120 TestVirtualSpace::test_virtual_space(); |
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1121 } |
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1122 |
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1123 #endif // PRODUCT |
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1124 |
0 | 1125 #endif |