Tue, 24 Dec 2013 11:48:39 -0800
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
duke@435 | 1 | /* |
hseigel@4465 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "oops/markOop.hpp" |
stefank@2314 | 27 | #include "oops/oop.inline.hpp" |
stefank@2314 | 28 | #include "runtime/virtualspace.hpp" |
zgu@3900 | 29 | #include "services/memTracker.hpp" |
stefank@2314 | 30 | #ifdef TARGET_OS_FAMILY_linux |
stefank@2314 | 31 | # include "os_linux.inline.hpp" |
stefank@2314 | 32 | #endif |
stefank@2314 | 33 | #ifdef TARGET_OS_FAMILY_solaris |
stefank@2314 | 34 | # include "os_solaris.inline.hpp" |
stefank@2314 | 35 | #endif |
stefank@2314 | 36 | #ifdef TARGET_OS_FAMILY_windows |
stefank@2314 | 37 | # include "os_windows.inline.hpp" |
stefank@2314 | 38 | #endif |
never@3156 | 39 | #ifdef TARGET_OS_FAMILY_bsd |
never@3156 | 40 | # include "os_bsd.inline.hpp" |
never@3156 | 41 | #endif |
duke@435 | 42 | |
duke@435 | 43 | |
duke@435 | 44 | // ReservedSpace |
stefank@5578 | 45 | |
stefank@5578 | 46 | // Dummy constructor |
stefank@5578 | 47 | ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0), |
stefank@5578 | 48 | _alignment(0), _special(false), _executable(false) { |
stefank@5578 | 49 | } |
stefank@5578 | 50 | |
duke@435 | 51 | ReservedSpace::ReservedSpace(size_t size) { |
stefank@5578 | 52 | size_t page_size = os::page_size_for_region(size, size, 1); |
stefank@5578 | 53 | bool large_pages = page_size != (size_t)os::vm_page_size(); |
stefank@5578 | 54 | // Don't force the alignment to be large page aligned, |
stefank@5578 | 55 | // since that will waste memory. |
stefank@5578 | 56 | size_t alignment = os::vm_allocation_granularity(); |
stefank@5578 | 57 | initialize(size, alignment, large_pages, NULL, 0, false); |
duke@435 | 58 | } |
duke@435 | 59 | |
duke@435 | 60 | ReservedSpace::ReservedSpace(size_t size, size_t alignment, |
coleenp@672 | 61 | bool large, |
coleenp@672 | 62 | char* requested_address, |
coleenp@672 | 63 | const size_t noaccess_prefix) { |
coleenp@672 | 64 | initialize(size+noaccess_prefix, alignment, large, requested_address, |
coleenp@1091 | 65 | noaccess_prefix, false); |
coleenp@1091 | 66 | } |
coleenp@1091 | 67 | |
coleenp@1091 | 68 | ReservedSpace::ReservedSpace(size_t size, size_t alignment, |
coleenp@1091 | 69 | bool large, |
coleenp@1091 | 70 | bool executable) { |
coleenp@1091 | 71 | initialize(size, alignment, large, NULL, 0, executable); |
duke@435 | 72 | } |
duke@435 | 73 | |
kvn@1973 | 74 | // Helper method. |
kvn@1973 | 75 | static bool failed_to_reserve_as_requested(char* base, char* requested_address, |
kvn@1973 | 76 | const size_t size, bool special) |
kvn@1973 | 77 | { |
kvn@1973 | 78 | if (base == requested_address || requested_address == NULL) |
kvn@1973 | 79 | return false; // did not fail |
kvn@1973 | 80 | |
kvn@1973 | 81 | if (base != NULL) { |
kvn@1973 | 82 | // Different reserve address may be acceptable in other cases |
kvn@1973 | 83 | // but for compressed oops heap should be at requested address. |
kvn@1973 | 84 | assert(UseCompressedOops, "currently requested address used only for compressed oops"); |
kvn@1973 | 85 | if (PrintCompressedOopsMode) { |
kvn@1973 | 86 | tty->cr(); |
johnc@3022 | 87 | tty->print_cr("Reserved memory not at requested address: " PTR_FORMAT " vs " PTR_FORMAT, base, requested_address); |
kvn@1973 | 88 | } |
kvn@1973 | 89 | // OS ignored requested address. Try different address. |
kvn@1973 | 90 | if (special) { |
kvn@1973 | 91 | if (!os::release_memory_special(base, size)) { |
kvn@1973 | 92 | fatal("os::release_memory_special failed"); |
kvn@1973 | 93 | } |
kvn@1973 | 94 | } else { |
kvn@1973 | 95 | if (!os::release_memory(base, size)) { |
kvn@1973 | 96 | fatal("os::release_memory failed"); |
kvn@1973 | 97 | } |
kvn@1973 | 98 | } |
kvn@1973 | 99 | } |
kvn@1973 | 100 | return true; |
kvn@1973 | 101 | } |
kvn@1973 | 102 | |
duke@435 | 103 | void ReservedSpace::initialize(size_t size, size_t alignment, bool large, |
coleenp@672 | 104 | char* requested_address, |
coleenp@1091 | 105 | const size_t noaccess_prefix, |
coleenp@1091 | 106 | bool executable) { |
duke@435 | 107 | const size_t granularity = os::vm_allocation_granularity(); |
johnc@3022 | 108 | assert((size & (granularity - 1)) == 0, |
duke@435 | 109 | "size not aligned to os::vm_allocation_granularity()"); |
johnc@3022 | 110 | assert((alignment & (granularity - 1)) == 0, |
duke@435 | 111 | "alignment not aligned to os::vm_allocation_granularity()"); |
duke@435 | 112 | assert(alignment == 0 || is_power_of_2((intptr_t)alignment), |
duke@435 | 113 | "not a power of 2"); |
duke@435 | 114 | |
johnc@3022 | 115 | alignment = MAX2(alignment, (size_t)os::vm_page_size()); |
johnc@3022 | 116 | |
johnc@3022 | 117 | // Assert that if noaccess_prefix is used, it is the same as alignment. |
johnc@3022 | 118 | assert(noaccess_prefix == 0 || |
johnc@3022 | 119 | noaccess_prefix == alignment, "noaccess prefix wrong"); |
johnc@3022 | 120 | |
duke@435 | 121 | _base = NULL; |
duke@435 | 122 | _size = 0; |
duke@435 | 123 | _special = false; |
coleenp@1091 | 124 | _executable = executable; |
duke@435 | 125 | _alignment = 0; |
coleenp@672 | 126 | _noaccess_prefix = 0; |
duke@435 | 127 | if (size == 0) { |
duke@435 | 128 | return; |
duke@435 | 129 | } |
duke@435 | 130 | |
duke@435 | 131 | // If OS doesn't support demand paging for large page memory, we need |
duke@435 | 132 | // to use reserve_memory_special() to reserve and pin the entire region. |
duke@435 | 133 | bool special = large && !os::can_commit_large_page_memory(); |
duke@435 | 134 | char* base = NULL; |
duke@435 | 135 | |
kvn@1973 | 136 | if (requested_address != 0) { |
kvn@1973 | 137 | requested_address -= noaccess_prefix; // adjust requested address |
kvn@1973 | 138 | assert(requested_address != NULL, "huge noaccess prefix?"); |
kvn@1973 | 139 | } |
kvn@1973 | 140 | |
duke@435 | 141 | if (special) { |
duke@435 | 142 | |
stefank@5578 | 143 | base = os::reserve_memory_special(size, alignment, requested_address, executable); |
duke@435 | 144 | |
duke@435 | 145 | if (base != NULL) { |
kvn@1973 | 146 | if (failed_to_reserve_as_requested(base, requested_address, size, true)) { |
kvn@1973 | 147 | // OS ignored requested address. Try different address. |
kvn@1973 | 148 | return; |
kvn@1973 | 149 | } |
stefank@5578 | 150 | // Check alignment constraints. |
johnc@3022 | 151 | assert((uintptr_t) base % alignment == 0, |
stefank@5578 | 152 | err_msg("Large pages returned a non-aligned address, base: " |
stefank@5578 | 153 | PTR_FORMAT " alignment: " PTR_FORMAT, |
stefank@5578 | 154 | base, (void*)(uintptr_t)alignment)); |
duke@435 | 155 | _special = true; |
duke@435 | 156 | } else { |
duke@435 | 157 | // failed; try to reserve regular memory below |
kvn@1973 | 158 | if (UseLargePages && (!FLAG_IS_DEFAULT(UseLargePages) || |
kvn@1973 | 159 | !FLAG_IS_DEFAULT(LargePageSizeInBytes))) { |
kvn@1973 | 160 | if (PrintCompressedOopsMode) { |
kvn@1973 | 161 | tty->cr(); |
kvn@1973 | 162 | tty->print_cr("Reserve regular memory without large pages."); |
kvn@1973 | 163 | } |
kvn@1973 | 164 | } |
duke@435 | 165 | } |
duke@435 | 166 | } |
duke@435 | 167 | |
duke@435 | 168 | if (base == NULL) { |
duke@435 | 169 | // Optimistically assume that the OSes returns an aligned base pointer. |
duke@435 | 170 | // When reserving a large address range, most OSes seem to align to at |
duke@435 | 171 | // least 64K. |
duke@435 | 172 | |
duke@435 | 173 | // If the memory was requested at a particular address, use |
duke@435 | 174 | // os::attempt_reserve_memory_at() to avoid over mapping something |
duke@435 | 175 | // important. If available space is not detected, return NULL. |
duke@435 | 176 | |
duke@435 | 177 | if (requested_address != 0) { |
kvn@1973 | 178 | base = os::attempt_reserve_memory_at(size, requested_address); |
kvn@1973 | 179 | if (failed_to_reserve_as_requested(base, requested_address, size, false)) { |
kvn@1973 | 180 | // OS ignored requested address. Try different address. |
kvn@1973 | 181 | base = NULL; |
kvn@1973 | 182 | } |
duke@435 | 183 | } else { |
duke@435 | 184 | base = os::reserve_memory(size, NULL, alignment); |
duke@435 | 185 | } |
duke@435 | 186 | |
duke@435 | 187 | if (base == NULL) return; |
duke@435 | 188 | |
duke@435 | 189 | // Check alignment constraints |
johnc@3022 | 190 | if ((((size_t)base + noaccess_prefix) & (alignment - 1)) != 0) { |
duke@435 | 191 | // Base not aligned, retry |
duke@435 | 192 | if (!os::release_memory(base, size)) fatal("os::release_memory failed"); |
brutisso@4369 | 193 | // Make sure that size is aligned |
duke@435 | 194 | size = align_size_up(size, alignment); |
brutisso@4369 | 195 | base = os::reserve_memory_aligned(size, alignment); |
johnc@3022 | 196 | |
johnc@3022 | 197 | if (requested_address != 0 && |
johnc@3022 | 198 | failed_to_reserve_as_requested(base, requested_address, size, false)) { |
johnc@3022 | 199 | // As a result of the alignment constraints, the allocated base differs |
johnc@3022 | 200 | // from the requested address. Return back to the caller who can |
johnc@3022 | 201 | // take remedial action (like try again without a requested address). |
johnc@3022 | 202 | assert(_base == NULL, "should be"); |
johnc@3022 | 203 | return; |
johnc@3022 | 204 | } |
duke@435 | 205 | } |
duke@435 | 206 | } |
duke@435 | 207 | // Done |
duke@435 | 208 | _base = base; |
duke@435 | 209 | _size = size; |
johnc@3022 | 210 | _alignment = alignment; |
coleenp@672 | 211 | _noaccess_prefix = noaccess_prefix; |
coleenp@672 | 212 | |
coleenp@672 | 213 | // Assert that if noaccess_prefix is used, it is the same as alignment. |
coleenp@672 | 214 | assert(noaccess_prefix == 0 || |
coleenp@672 | 215 | noaccess_prefix == _alignment, "noaccess prefix wrong"); |
duke@435 | 216 | |
duke@435 | 217 | assert(markOopDesc::encode_pointer_as_mark(_base)->decode_pointer() == _base, |
duke@435 | 218 | "area must be distinguisable from marks for mark-sweep"); |
duke@435 | 219 | assert(markOopDesc::encode_pointer_as_mark(&_base[size])->decode_pointer() == &_base[size], |
duke@435 | 220 | "area must be distinguisable from marks for mark-sweep"); |
duke@435 | 221 | } |
duke@435 | 222 | |
duke@435 | 223 | |
duke@435 | 224 | ReservedSpace::ReservedSpace(char* base, size_t size, size_t alignment, |
coleenp@1091 | 225 | bool special, bool executable) { |
duke@435 | 226 | assert((size % os::vm_allocation_granularity()) == 0, |
duke@435 | 227 | "size not allocation aligned"); |
duke@435 | 228 | _base = base; |
duke@435 | 229 | _size = size; |
duke@435 | 230 | _alignment = alignment; |
coleenp@672 | 231 | _noaccess_prefix = 0; |
duke@435 | 232 | _special = special; |
coleenp@1091 | 233 | _executable = executable; |
duke@435 | 234 | } |
duke@435 | 235 | |
duke@435 | 236 | |
duke@435 | 237 | ReservedSpace ReservedSpace::first_part(size_t partition_size, size_t alignment, |
duke@435 | 238 | bool split, bool realloc) { |
duke@435 | 239 | assert(partition_size <= size(), "partition failed"); |
duke@435 | 240 | if (split) { |
coleenp@1091 | 241 | os::split_reserved_memory(base(), size(), partition_size, realloc); |
duke@435 | 242 | } |
coleenp@1091 | 243 | ReservedSpace result(base(), partition_size, alignment, special(), |
coleenp@1091 | 244 | executable()); |
duke@435 | 245 | return result; |
duke@435 | 246 | } |
duke@435 | 247 | |
duke@435 | 248 | |
duke@435 | 249 | ReservedSpace |
duke@435 | 250 | ReservedSpace::last_part(size_t partition_size, size_t alignment) { |
duke@435 | 251 | assert(partition_size <= size(), "partition failed"); |
duke@435 | 252 | ReservedSpace result(base() + partition_size, size() - partition_size, |
coleenp@1091 | 253 | alignment, special(), executable()); |
duke@435 | 254 | return result; |
duke@435 | 255 | } |
duke@435 | 256 | |
duke@435 | 257 | |
duke@435 | 258 | size_t ReservedSpace::page_align_size_up(size_t size) { |
duke@435 | 259 | return align_size_up(size, os::vm_page_size()); |
duke@435 | 260 | } |
duke@435 | 261 | |
duke@435 | 262 | |
duke@435 | 263 | size_t ReservedSpace::page_align_size_down(size_t size) { |
duke@435 | 264 | return align_size_down(size, os::vm_page_size()); |
duke@435 | 265 | } |
duke@435 | 266 | |
duke@435 | 267 | |
duke@435 | 268 | size_t ReservedSpace::allocation_align_size_up(size_t size) { |
duke@435 | 269 | return align_size_up(size, os::vm_allocation_granularity()); |
duke@435 | 270 | } |
duke@435 | 271 | |
duke@435 | 272 | |
duke@435 | 273 | size_t ReservedSpace::allocation_align_size_down(size_t size) { |
duke@435 | 274 | return align_size_down(size, os::vm_allocation_granularity()); |
duke@435 | 275 | } |
duke@435 | 276 | |
duke@435 | 277 | |
duke@435 | 278 | void ReservedSpace::release() { |
duke@435 | 279 | if (is_reserved()) { |
coleenp@672 | 280 | char *real_base = _base - _noaccess_prefix; |
coleenp@672 | 281 | const size_t real_size = _size + _noaccess_prefix; |
duke@435 | 282 | if (special()) { |
coleenp@672 | 283 | os::release_memory_special(real_base, real_size); |
duke@435 | 284 | } else{ |
coleenp@672 | 285 | os::release_memory(real_base, real_size); |
duke@435 | 286 | } |
duke@435 | 287 | _base = NULL; |
duke@435 | 288 | _size = 0; |
coleenp@672 | 289 | _noaccess_prefix = 0; |
duke@435 | 290 | _special = false; |
coleenp@1091 | 291 | _executable = false; |
duke@435 | 292 | } |
duke@435 | 293 | } |
duke@435 | 294 | |
coleenp@672 | 295 | void ReservedSpace::protect_noaccess_prefix(const size_t size) { |
kvn@1973 | 296 | assert( (_noaccess_prefix != 0) == (UseCompressedOops && _base != NULL && |
coleenp@3561 | 297 | (Universe::narrow_oop_base() != NULL) && |
kvn@1973 | 298 | Universe::narrow_oop_use_implicit_null_checks()), |
kvn@1973 | 299 | "noaccess_prefix should be used only with non zero based compressed oops"); |
kvn@1973 | 300 | |
kvn@1973 | 301 | // If there is no noaccess prefix, return. |
coleenp@672 | 302 | if (_noaccess_prefix == 0) return; |
coleenp@672 | 303 | |
coleenp@672 | 304 | assert(_noaccess_prefix >= (size_t)os::vm_page_size(), |
coleenp@672 | 305 | "must be at least page size big"); |
coleenp@672 | 306 | |
coleenp@672 | 307 | // Protect memory at the base of the allocated region. |
coleenp@672 | 308 | // If special, the page was committed (only matters on windows) |
coleenp@672 | 309 | if (!os::protect_memory(_base, _noaccess_prefix, os::MEM_PROT_NONE, |
coleenp@672 | 310 | _special)) { |
coleenp@672 | 311 | fatal("cannot protect protection page"); |
coleenp@672 | 312 | } |
kvn@1973 | 313 | if (PrintCompressedOopsMode) { |
kvn@1973 | 314 | tty->cr(); |
kvn@1973 | 315 | tty->print_cr("Protected page at the reserved heap base: " PTR_FORMAT " / " INTX_FORMAT " bytes", _base, _noaccess_prefix); |
kvn@1973 | 316 | } |
coleenp@672 | 317 | |
coleenp@672 | 318 | _base += _noaccess_prefix; |
coleenp@672 | 319 | _size -= _noaccess_prefix; |
coleenp@672 | 320 | assert((size == _size) && ((uintptr_t)_base % _alignment == 0), |
coleenp@672 | 321 | "must be exactly of required size and alignment"); |
coleenp@672 | 322 | } |
coleenp@672 | 323 | |
coleenp@672 | 324 | ReservedHeapSpace::ReservedHeapSpace(size_t size, size_t alignment, |
coleenp@672 | 325 | bool large, char* requested_address) : |
coleenp@672 | 326 | ReservedSpace(size, alignment, large, |
coleenp@672 | 327 | requested_address, |
kvn@1077 | 328 | (UseCompressedOops && (Universe::narrow_oop_base() != NULL) && |
kvn@1077 | 329 | Universe::narrow_oop_use_implicit_null_checks()) ? |
coleenp@760 | 330 | lcm(os::vm_page_size(), alignment) : 0) { |
zgu@3900 | 331 | if (base() > 0) { |
zgu@3900 | 332 | MemTracker::record_virtual_memory_type((address)base(), mtJavaHeap); |
zgu@3900 | 333 | } |
zgu@3900 | 334 | |
coleenp@672 | 335 | // Only reserved space for the java heap should have a noaccess_prefix |
coleenp@672 | 336 | // if using compressed oops. |
coleenp@672 | 337 | protect_noaccess_prefix(size); |
coleenp@672 | 338 | } |
coleenp@672 | 339 | |
coleenp@1091 | 340 | // Reserve space for code segment. Same as Java heap only we mark this as |
coleenp@1091 | 341 | // executable. |
coleenp@1091 | 342 | ReservedCodeSpace::ReservedCodeSpace(size_t r_size, |
coleenp@1091 | 343 | size_t rs_align, |
coleenp@1091 | 344 | bool large) : |
coleenp@1091 | 345 | ReservedSpace(r_size, rs_align, large, /*executable*/ true) { |
zgu@3900 | 346 | MemTracker::record_virtual_memory_type((address)base(), mtCode); |
coleenp@1091 | 347 | } |
coleenp@1091 | 348 | |
duke@435 | 349 | // VirtualSpace |
duke@435 | 350 | |
duke@435 | 351 | VirtualSpace::VirtualSpace() { |
duke@435 | 352 | _low_boundary = NULL; |
duke@435 | 353 | _high_boundary = NULL; |
duke@435 | 354 | _low = NULL; |
duke@435 | 355 | _high = NULL; |
duke@435 | 356 | _lower_high = NULL; |
duke@435 | 357 | _middle_high = NULL; |
duke@435 | 358 | _upper_high = NULL; |
duke@435 | 359 | _lower_high_boundary = NULL; |
duke@435 | 360 | _middle_high_boundary = NULL; |
duke@435 | 361 | _upper_high_boundary = NULL; |
duke@435 | 362 | _lower_alignment = 0; |
duke@435 | 363 | _middle_alignment = 0; |
duke@435 | 364 | _upper_alignment = 0; |
coleenp@672 | 365 | _special = false; |
coleenp@1091 | 366 | _executable = false; |
duke@435 | 367 | } |
duke@435 | 368 | |
duke@435 | 369 | |
duke@435 | 370 | bool VirtualSpace::initialize(ReservedSpace rs, size_t committed_size) { |
mgerdin@5859 | 371 | const size_t max_commit_granularity = os::page_size_for_region(rs.size(), rs.size(), 1); |
mgerdin@5859 | 372 | return initialize_with_granularity(rs, committed_size, max_commit_granularity); |
mgerdin@5859 | 373 | } |
mgerdin@5859 | 374 | |
mgerdin@5859 | 375 | bool VirtualSpace::initialize_with_granularity(ReservedSpace rs, size_t committed_size, size_t max_commit_granularity) { |
duke@435 | 376 | if(!rs.is_reserved()) return false; // allocation failed. |
duke@435 | 377 | assert(_low_boundary == NULL, "VirtualSpace already initialized"); |
mgerdin@5859 | 378 | assert(max_commit_granularity > 0, "Granularity must be non-zero."); |
mgerdin@5859 | 379 | |
duke@435 | 380 | _low_boundary = rs.base(); |
duke@435 | 381 | _high_boundary = low_boundary() + rs.size(); |
duke@435 | 382 | |
duke@435 | 383 | _low = low_boundary(); |
duke@435 | 384 | _high = low(); |
duke@435 | 385 | |
duke@435 | 386 | _special = rs.special(); |
coleenp@1091 | 387 | _executable = rs.executable(); |
duke@435 | 388 | |
duke@435 | 389 | // When a VirtualSpace begins life at a large size, make all future expansion |
duke@435 | 390 | // and shrinking occur aligned to a granularity of large pages. This avoids |
duke@435 | 391 | // fragmentation of physical addresses that inhibits the use of large pages |
duke@435 | 392 | // by the OS virtual memory system. Empirically, we see that with a 4MB |
duke@435 | 393 | // page size, the only spaces that get handled this way are codecache and |
duke@435 | 394 | // the heap itself, both of which provide a substantial performance |
duke@435 | 395 | // boost in many benchmarks when covered by large pages. |
duke@435 | 396 | // |
duke@435 | 397 | // No attempt is made to force large page alignment at the very top and |
duke@435 | 398 | // bottom of the space if they are not aligned so already. |
duke@435 | 399 | _lower_alignment = os::vm_page_size(); |
mgerdin@5859 | 400 | _middle_alignment = max_commit_granularity; |
duke@435 | 401 | _upper_alignment = os::vm_page_size(); |
duke@435 | 402 | |
duke@435 | 403 | // End of each region |
duke@435 | 404 | _lower_high_boundary = (char*) round_to((intptr_t) low_boundary(), middle_alignment()); |
duke@435 | 405 | _middle_high_boundary = (char*) round_down((intptr_t) high_boundary(), middle_alignment()); |
duke@435 | 406 | _upper_high_boundary = high_boundary(); |
duke@435 | 407 | |
duke@435 | 408 | // High address of each region |
duke@435 | 409 | _lower_high = low_boundary(); |
duke@435 | 410 | _middle_high = lower_high_boundary(); |
duke@435 | 411 | _upper_high = middle_high_boundary(); |
duke@435 | 412 | |
duke@435 | 413 | // commit to initial size |
duke@435 | 414 | if (committed_size > 0) { |
duke@435 | 415 | if (!expand_by(committed_size)) { |
duke@435 | 416 | return false; |
duke@435 | 417 | } |
duke@435 | 418 | } |
duke@435 | 419 | return true; |
duke@435 | 420 | } |
duke@435 | 421 | |
duke@435 | 422 | |
duke@435 | 423 | VirtualSpace::~VirtualSpace() { |
duke@435 | 424 | release(); |
duke@435 | 425 | } |
duke@435 | 426 | |
duke@435 | 427 | |
duke@435 | 428 | void VirtualSpace::release() { |
coleenp@672 | 429 | // This does not release memory it never reserved. |
coleenp@672 | 430 | // Caller must release via rs.release(); |
duke@435 | 431 | _low_boundary = NULL; |
duke@435 | 432 | _high_boundary = NULL; |
duke@435 | 433 | _low = NULL; |
duke@435 | 434 | _high = NULL; |
duke@435 | 435 | _lower_high = NULL; |
duke@435 | 436 | _middle_high = NULL; |
duke@435 | 437 | _upper_high = NULL; |
duke@435 | 438 | _lower_high_boundary = NULL; |
duke@435 | 439 | _middle_high_boundary = NULL; |
duke@435 | 440 | _upper_high_boundary = NULL; |
duke@435 | 441 | _lower_alignment = 0; |
duke@435 | 442 | _middle_alignment = 0; |
duke@435 | 443 | _upper_alignment = 0; |
duke@435 | 444 | _special = false; |
coleenp@1091 | 445 | _executable = false; |
duke@435 | 446 | } |
duke@435 | 447 | |
duke@435 | 448 | |
duke@435 | 449 | size_t VirtualSpace::committed_size() const { |
duke@435 | 450 | return pointer_delta(high(), low(), sizeof(char)); |
duke@435 | 451 | } |
duke@435 | 452 | |
duke@435 | 453 | |
duke@435 | 454 | size_t VirtualSpace::reserved_size() const { |
duke@435 | 455 | return pointer_delta(high_boundary(), low_boundary(), sizeof(char)); |
duke@435 | 456 | } |
duke@435 | 457 | |
duke@435 | 458 | |
duke@435 | 459 | size_t VirtualSpace::uncommitted_size() const { |
duke@435 | 460 | return reserved_size() - committed_size(); |
duke@435 | 461 | } |
duke@435 | 462 | |
stefank@5704 | 463 | size_t VirtualSpace::actual_committed_size() const { |
stefank@5704 | 464 | // Special VirtualSpaces commit all reserved space up front. |
stefank@5704 | 465 | if (special()) { |
stefank@5704 | 466 | return reserved_size(); |
stefank@5704 | 467 | } |
stefank@5704 | 468 | |
stefank@5704 | 469 | size_t committed_low = pointer_delta(_lower_high, _low_boundary, sizeof(char)); |
stefank@5704 | 470 | size_t committed_middle = pointer_delta(_middle_high, _lower_high_boundary, sizeof(char)); |
stefank@5704 | 471 | size_t committed_high = pointer_delta(_upper_high, _middle_high_boundary, sizeof(char)); |
stefank@5704 | 472 | |
stefank@5704 | 473 | #ifdef ASSERT |
stefank@5704 | 474 | size_t lower = pointer_delta(_lower_high_boundary, _low_boundary, sizeof(char)); |
stefank@5704 | 475 | size_t middle = pointer_delta(_middle_high_boundary, _lower_high_boundary, sizeof(char)); |
stefank@5704 | 476 | size_t upper = pointer_delta(_upper_high_boundary, _middle_high_boundary, sizeof(char)); |
stefank@5704 | 477 | |
stefank@5704 | 478 | if (committed_high > 0) { |
stefank@5704 | 479 | assert(committed_low == lower, "Must be"); |
stefank@5704 | 480 | assert(committed_middle == middle, "Must be"); |
stefank@5704 | 481 | } |
stefank@5704 | 482 | |
stefank@5704 | 483 | if (committed_middle > 0) { |
stefank@5704 | 484 | assert(committed_low == lower, "Must be"); |
stefank@5704 | 485 | } |
stefank@5704 | 486 | if (committed_middle < middle) { |
stefank@5704 | 487 | assert(committed_high == 0, "Must be"); |
stefank@5704 | 488 | } |
stefank@5704 | 489 | |
stefank@5704 | 490 | if (committed_low < lower) { |
stefank@5704 | 491 | assert(committed_high == 0, "Must be"); |
stefank@5704 | 492 | assert(committed_middle == 0, "Must be"); |
stefank@5704 | 493 | } |
stefank@5704 | 494 | #endif |
stefank@5704 | 495 | |
stefank@5704 | 496 | return committed_low + committed_middle + committed_high; |
stefank@5704 | 497 | } |
stefank@5704 | 498 | |
duke@435 | 499 | |
duke@435 | 500 | bool VirtualSpace::contains(const void* p) const { |
duke@435 | 501 | return low() <= (const char*) p && (const char*) p < high(); |
duke@435 | 502 | } |
duke@435 | 503 | |
duke@435 | 504 | /* |
duke@435 | 505 | First we need to determine if a particular virtual space is using large |
duke@435 | 506 | pages. This is done at the initialize function and only virtual spaces |
duke@435 | 507 | that are larger than LargePageSizeInBytes use large pages. Once we |
duke@435 | 508 | have determined this, all expand_by and shrink_by calls must grow and |
duke@435 | 509 | shrink by large page size chunks. If a particular request |
duke@435 | 510 | is within the current large page, the call to commit and uncommit memory |
duke@435 | 511 | can be ignored. In the case that the low and high boundaries of this |
duke@435 | 512 | space is not large page aligned, the pages leading to the first large |
duke@435 | 513 | page address and the pages after the last large page address must be |
duke@435 | 514 | allocated with default pages. |
duke@435 | 515 | */ |
duke@435 | 516 | bool VirtualSpace::expand_by(size_t bytes, bool pre_touch) { |
duke@435 | 517 | if (uncommitted_size() < bytes) return false; |
duke@435 | 518 | |
duke@435 | 519 | if (special()) { |
duke@435 | 520 | // don't commit memory if the entire space is pinned in memory |
duke@435 | 521 | _high += bytes; |
duke@435 | 522 | return true; |
duke@435 | 523 | } |
duke@435 | 524 | |
duke@435 | 525 | char* previous_high = high(); |
duke@435 | 526 | char* unaligned_new_high = high() + bytes; |
duke@435 | 527 | assert(unaligned_new_high <= high_boundary(), |
duke@435 | 528 | "cannot expand by more than upper boundary"); |
duke@435 | 529 | |
duke@435 | 530 | // Calculate where the new high for each of the regions should be. If |
duke@435 | 531 | // the low_boundary() and high_boundary() are LargePageSizeInBytes aligned |
duke@435 | 532 | // then the unaligned lower and upper new highs would be the |
duke@435 | 533 | // lower_high() and upper_high() respectively. |
duke@435 | 534 | char* unaligned_lower_new_high = |
duke@435 | 535 | MIN2(unaligned_new_high, lower_high_boundary()); |
duke@435 | 536 | char* unaligned_middle_new_high = |
duke@435 | 537 | MIN2(unaligned_new_high, middle_high_boundary()); |
duke@435 | 538 | char* unaligned_upper_new_high = |
duke@435 | 539 | MIN2(unaligned_new_high, upper_high_boundary()); |
duke@435 | 540 | |
duke@435 | 541 | // Align the new highs based on the regions alignment. lower and upper |
duke@435 | 542 | // alignment will always be default page size. middle alignment will be |
duke@435 | 543 | // LargePageSizeInBytes if the actual size of the virtual space is in |
duke@435 | 544 | // fact larger than LargePageSizeInBytes. |
duke@435 | 545 | char* aligned_lower_new_high = |
duke@435 | 546 | (char*) round_to((intptr_t) unaligned_lower_new_high, lower_alignment()); |
duke@435 | 547 | char* aligned_middle_new_high = |
duke@435 | 548 | (char*) round_to((intptr_t) unaligned_middle_new_high, middle_alignment()); |
duke@435 | 549 | char* aligned_upper_new_high = |
duke@435 | 550 | (char*) round_to((intptr_t) unaligned_upper_new_high, upper_alignment()); |
duke@435 | 551 | |
duke@435 | 552 | // Determine which regions need to grow in this expand_by call. |
duke@435 | 553 | // If you are growing in the lower region, high() must be in that |
duke@435 | 554 | // region so calcuate the size based on high(). For the middle and |
duke@435 | 555 | // upper regions, determine the starting point of growth based on the |
duke@435 | 556 | // location of high(). By getting the MAX of the region's low address |
duke@435 | 557 | // (or the prevoius region's high address) and high(), we can tell if it |
duke@435 | 558 | // is an intra or inter region growth. |
duke@435 | 559 | size_t lower_needs = 0; |
duke@435 | 560 | if (aligned_lower_new_high > lower_high()) { |
duke@435 | 561 | lower_needs = |
duke@435 | 562 | pointer_delta(aligned_lower_new_high, lower_high(), sizeof(char)); |
duke@435 | 563 | } |
duke@435 | 564 | size_t middle_needs = 0; |
duke@435 | 565 | if (aligned_middle_new_high > middle_high()) { |
duke@435 | 566 | middle_needs = |
duke@435 | 567 | pointer_delta(aligned_middle_new_high, middle_high(), sizeof(char)); |
duke@435 | 568 | } |
duke@435 | 569 | size_t upper_needs = 0; |
duke@435 | 570 | if (aligned_upper_new_high > upper_high()) { |
duke@435 | 571 | upper_needs = |
duke@435 | 572 | pointer_delta(aligned_upper_new_high, upper_high(), sizeof(char)); |
duke@435 | 573 | } |
duke@435 | 574 | |
duke@435 | 575 | // Check contiguity. |
duke@435 | 576 | assert(low_boundary() <= lower_high() && |
duke@435 | 577 | lower_high() <= lower_high_boundary(), |
duke@435 | 578 | "high address must be contained within the region"); |
duke@435 | 579 | assert(lower_high_boundary() <= middle_high() && |
duke@435 | 580 | middle_high() <= middle_high_boundary(), |
duke@435 | 581 | "high address must be contained within the region"); |
duke@435 | 582 | assert(middle_high_boundary() <= upper_high() && |
duke@435 | 583 | upper_high() <= upper_high_boundary(), |
duke@435 | 584 | "high address must be contained within the region"); |
duke@435 | 585 | |
duke@435 | 586 | // Commit regions |
duke@435 | 587 | if (lower_needs > 0) { |
duke@435 | 588 | assert(low_boundary() <= lower_high() && |
duke@435 | 589 | lower_high() + lower_needs <= lower_high_boundary(), |
duke@435 | 590 | "must not expand beyond region"); |
coleenp@1091 | 591 | if (!os::commit_memory(lower_high(), lower_needs, _executable)) { |
dcubed@5255 | 592 | debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
dcubed@5255 | 593 | ", lower_needs=" SIZE_FORMAT ", %d) failed", |
dcubed@5255 | 594 | lower_high(), lower_needs, _executable);) |
duke@435 | 595 | return false; |
duke@435 | 596 | } else { |
duke@435 | 597 | _lower_high += lower_needs; |
dcubed@5255 | 598 | } |
duke@435 | 599 | } |
duke@435 | 600 | if (middle_needs > 0) { |
duke@435 | 601 | assert(lower_high_boundary() <= middle_high() && |
duke@435 | 602 | middle_high() + middle_needs <= middle_high_boundary(), |
duke@435 | 603 | "must not expand beyond region"); |
coleenp@1091 | 604 | if (!os::commit_memory(middle_high(), middle_needs, middle_alignment(), |
coleenp@1091 | 605 | _executable)) { |
dcubed@5255 | 606 | debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
dcubed@5255 | 607 | ", middle_needs=" SIZE_FORMAT ", " SIZE_FORMAT |
dcubed@5255 | 608 | ", %d) failed", middle_high(), middle_needs, |
dcubed@5255 | 609 | middle_alignment(), _executable);) |
duke@435 | 610 | return false; |
duke@435 | 611 | } |
duke@435 | 612 | _middle_high += middle_needs; |
duke@435 | 613 | } |
duke@435 | 614 | if (upper_needs > 0) { |
duke@435 | 615 | assert(middle_high_boundary() <= upper_high() && |
duke@435 | 616 | upper_high() + upper_needs <= upper_high_boundary(), |
duke@435 | 617 | "must not expand beyond region"); |
coleenp@1091 | 618 | if (!os::commit_memory(upper_high(), upper_needs, _executable)) { |
dcubed@5255 | 619 | debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
dcubed@5255 | 620 | ", upper_needs=" SIZE_FORMAT ", %d) failed", |
dcubed@5255 | 621 | upper_high(), upper_needs, _executable);) |
duke@435 | 622 | return false; |
duke@435 | 623 | } else { |
duke@435 | 624 | _upper_high += upper_needs; |
duke@435 | 625 | } |
duke@435 | 626 | } |
duke@435 | 627 | |
duke@435 | 628 | if (pre_touch || AlwaysPreTouch) { |
duke@435 | 629 | int vm_ps = os::vm_page_size(); |
duke@435 | 630 | for (char* curr = previous_high; |
duke@435 | 631 | curr < unaligned_new_high; |
duke@435 | 632 | curr += vm_ps) { |
duke@435 | 633 | // Note the use of a write here; originally we tried just a read, but |
duke@435 | 634 | // since the value read was unused, the optimizer removed the read. |
duke@435 | 635 | // If we ever have a concurrent touchahead thread, we'll want to use |
duke@435 | 636 | // a read, to avoid the potential of overwriting data (if a mutator |
duke@435 | 637 | // thread beats the touchahead thread to a page). There are various |
duke@435 | 638 | // ways of making sure this read is not optimized away: for example, |
duke@435 | 639 | // generating the code for a read procedure at runtime. |
duke@435 | 640 | *curr = 0; |
duke@435 | 641 | } |
duke@435 | 642 | } |
duke@435 | 643 | |
duke@435 | 644 | _high += bytes; |
duke@435 | 645 | return true; |
duke@435 | 646 | } |
duke@435 | 647 | |
duke@435 | 648 | // A page is uncommitted if the contents of the entire page is deemed unusable. |
duke@435 | 649 | // Continue to decrement the high() pointer until it reaches a page boundary |
duke@435 | 650 | // in which case that particular page can now be uncommitted. |
duke@435 | 651 | void VirtualSpace::shrink_by(size_t size) { |
duke@435 | 652 | if (committed_size() < size) |
duke@435 | 653 | fatal("Cannot shrink virtual space to negative size"); |
duke@435 | 654 | |
duke@435 | 655 | if (special()) { |
duke@435 | 656 | // don't uncommit if the entire space is pinned in memory |
duke@435 | 657 | _high -= size; |
duke@435 | 658 | return; |
duke@435 | 659 | } |
duke@435 | 660 | |
duke@435 | 661 | char* unaligned_new_high = high() - size; |
duke@435 | 662 | assert(unaligned_new_high >= low_boundary(), "cannot shrink past lower boundary"); |
duke@435 | 663 | |
duke@435 | 664 | // Calculate new unaligned address |
duke@435 | 665 | char* unaligned_upper_new_high = |
duke@435 | 666 | MAX2(unaligned_new_high, middle_high_boundary()); |
duke@435 | 667 | char* unaligned_middle_new_high = |
duke@435 | 668 | MAX2(unaligned_new_high, lower_high_boundary()); |
duke@435 | 669 | char* unaligned_lower_new_high = |
duke@435 | 670 | MAX2(unaligned_new_high, low_boundary()); |
duke@435 | 671 | |
duke@435 | 672 | // Align address to region's alignment |
duke@435 | 673 | char* aligned_upper_new_high = |
duke@435 | 674 | (char*) round_to((intptr_t) unaligned_upper_new_high, upper_alignment()); |
duke@435 | 675 | char* aligned_middle_new_high = |
duke@435 | 676 | (char*) round_to((intptr_t) unaligned_middle_new_high, middle_alignment()); |
duke@435 | 677 | char* aligned_lower_new_high = |
duke@435 | 678 | (char*) round_to((intptr_t) unaligned_lower_new_high, lower_alignment()); |
duke@435 | 679 | |
duke@435 | 680 | // Determine which regions need to shrink |
duke@435 | 681 | size_t upper_needs = 0; |
duke@435 | 682 | if (aligned_upper_new_high < upper_high()) { |
duke@435 | 683 | upper_needs = |
duke@435 | 684 | pointer_delta(upper_high(), aligned_upper_new_high, sizeof(char)); |
duke@435 | 685 | } |
duke@435 | 686 | size_t middle_needs = 0; |
duke@435 | 687 | if (aligned_middle_new_high < middle_high()) { |
duke@435 | 688 | middle_needs = |
duke@435 | 689 | pointer_delta(middle_high(), aligned_middle_new_high, sizeof(char)); |
duke@435 | 690 | } |
duke@435 | 691 | size_t lower_needs = 0; |
duke@435 | 692 | if (aligned_lower_new_high < lower_high()) { |
duke@435 | 693 | lower_needs = |
duke@435 | 694 | pointer_delta(lower_high(), aligned_lower_new_high, sizeof(char)); |
duke@435 | 695 | } |
duke@435 | 696 | |
duke@435 | 697 | // Check contiguity. |
duke@435 | 698 | assert(middle_high_boundary() <= upper_high() && |
duke@435 | 699 | upper_high() <= upper_high_boundary(), |
duke@435 | 700 | "high address must be contained within the region"); |
duke@435 | 701 | assert(lower_high_boundary() <= middle_high() && |
duke@435 | 702 | middle_high() <= middle_high_boundary(), |
duke@435 | 703 | "high address must be contained within the region"); |
duke@435 | 704 | assert(low_boundary() <= lower_high() && |
duke@435 | 705 | lower_high() <= lower_high_boundary(), |
duke@435 | 706 | "high address must be contained within the region"); |
duke@435 | 707 | |
duke@435 | 708 | // Uncommit |
duke@435 | 709 | if (upper_needs > 0) { |
duke@435 | 710 | assert(middle_high_boundary() <= aligned_upper_new_high && |
duke@435 | 711 | aligned_upper_new_high + upper_needs <= upper_high_boundary(), |
duke@435 | 712 | "must not shrink beyond region"); |
duke@435 | 713 | if (!os::uncommit_memory(aligned_upper_new_high, upper_needs)) { |
duke@435 | 714 | debug_only(warning("os::uncommit_memory failed")); |
duke@435 | 715 | return; |
duke@435 | 716 | } else { |
duke@435 | 717 | _upper_high -= upper_needs; |
duke@435 | 718 | } |
duke@435 | 719 | } |
duke@435 | 720 | if (middle_needs > 0) { |
duke@435 | 721 | assert(lower_high_boundary() <= aligned_middle_new_high && |
duke@435 | 722 | aligned_middle_new_high + middle_needs <= middle_high_boundary(), |
duke@435 | 723 | "must not shrink beyond region"); |
duke@435 | 724 | if (!os::uncommit_memory(aligned_middle_new_high, middle_needs)) { |
duke@435 | 725 | debug_only(warning("os::uncommit_memory failed")); |
duke@435 | 726 | return; |
duke@435 | 727 | } else { |
duke@435 | 728 | _middle_high -= middle_needs; |
duke@435 | 729 | } |
duke@435 | 730 | } |
duke@435 | 731 | if (lower_needs > 0) { |
duke@435 | 732 | assert(low_boundary() <= aligned_lower_new_high && |
duke@435 | 733 | aligned_lower_new_high + lower_needs <= lower_high_boundary(), |
duke@435 | 734 | "must not shrink beyond region"); |
duke@435 | 735 | if (!os::uncommit_memory(aligned_lower_new_high, lower_needs)) { |
duke@435 | 736 | debug_only(warning("os::uncommit_memory failed")); |
duke@435 | 737 | return; |
duke@435 | 738 | } else { |
duke@435 | 739 | _lower_high -= lower_needs; |
duke@435 | 740 | } |
duke@435 | 741 | } |
duke@435 | 742 | |
duke@435 | 743 | _high -= size; |
duke@435 | 744 | } |
duke@435 | 745 | |
duke@435 | 746 | #ifndef PRODUCT |
duke@435 | 747 | void VirtualSpace::check_for_contiguity() { |
duke@435 | 748 | // Check contiguity. |
duke@435 | 749 | assert(low_boundary() <= lower_high() && |
duke@435 | 750 | lower_high() <= lower_high_boundary(), |
duke@435 | 751 | "high address must be contained within the region"); |
duke@435 | 752 | assert(lower_high_boundary() <= middle_high() && |
duke@435 | 753 | middle_high() <= middle_high_boundary(), |
duke@435 | 754 | "high address must be contained within the region"); |
duke@435 | 755 | assert(middle_high_boundary() <= upper_high() && |
duke@435 | 756 | upper_high() <= upper_high_boundary(), |
duke@435 | 757 | "high address must be contained within the region"); |
duke@435 | 758 | assert(low() >= low_boundary(), "low"); |
duke@435 | 759 | assert(low_boundary() <= lower_high_boundary(), "lower high boundary"); |
duke@435 | 760 | assert(upper_high_boundary() <= high_boundary(), "upper high boundary"); |
duke@435 | 761 | assert(high() <= upper_high(), "upper high"); |
duke@435 | 762 | } |
duke@435 | 763 | |
stefank@5708 | 764 | void VirtualSpace::print_on(outputStream* out) { |
stefank@5708 | 765 | out->print ("Virtual space:"); |
stefank@5708 | 766 | if (special()) out->print(" (pinned in memory)"); |
stefank@5708 | 767 | out->cr(); |
stefank@5708 | 768 | out->print_cr(" - committed: " SIZE_FORMAT, committed_size()); |
stefank@5708 | 769 | out->print_cr(" - reserved: " SIZE_FORMAT, reserved_size()); |
stefank@5708 | 770 | out->print_cr(" - [low, high]: [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", low(), high()); |
stefank@5708 | 771 | out->print_cr(" - [low_b, high_b]: [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", low_boundary(), high_boundary()); |
duke@435 | 772 | } |
duke@435 | 773 | |
stefank@5708 | 774 | void VirtualSpace::print() { |
stefank@5708 | 775 | print_on(tty); |
stefank@5708 | 776 | } |
stefank@5578 | 777 | |
stefank@5578 | 778 | /////////////// Unit tests /////////////// |
stefank@5578 | 779 | |
stefank@5578 | 780 | #ifndef PRODUCT |
stefank@5578 | 781 | |
stefank@5578 | 782 | #define test_log(...) \ |
stefank@5578 | 783 | do {\ |
stefank@5578 | 784 | if (VerboseInternalVMTests) { \ |
stefank@5578 | 785 | tty->print_cr(__VA_ARGS__); \ |
stefank@5578 | 786 | tty->flush(); \ |
stefank@5578 | 787 | }\ |
stefank@5578 | 788 | } while (false) |
stefank@5578 | 789 | |
stefank@5578 | 790 | class TestReservedSpace : AllStatic { |
stefank@5578 | 791 | public: |
stefank@5578 | 792 | static void small_page_write(void* addr, size_t size) { |
stefank@5578 | 793 | size_t page_size = os::vm_page_size(); |
stefank@5578 | 794 | |
stefank@5578 | 795 | char* end = (char*)addr + size; |
stefank@5578 | 796 | for (char* p = (char*)addr; p < end; p += page_size) { |
stefank@5578 | 797 | *p = 1; |
stefank@5578 | 798 | } |
stefank@5578 | 799 | } |
stefank@5578 | 800 | |
stefank@5578 | 801 | static void release_memory_for_test(ReservedSpace rs) { |
stefank@5578 | 802 | if (rs.special()) { |
stefank@5578 | 803 | guarantee(os::release_memory_special(rs.base(), rs.size()), "Shouldn't fail"); |
stefank@5578 | 804 | } else { |
stefank@5578 | 805 | guarantee(os::release_memory(rs.base(), rs.size()), "Shouldn't fail"); |
stefank@5578 | 806 | } |
stefank@5578 | 807 | } |
stefank@5578 | 808 | |
stefank@5578 | 809 | static void test_reserved_space1(size_t size, size_t alignment) { |
stefank@5578 | 810 | test_log("test_reserved_space1(%p)", (void*) (uintptr_t) size); |
stefank@5578 | 811 | |
stefank@5578 | 812 | assert(is_size_aligned(size, alignment), "Incorrect input parameters"); |
stefank@5578 | 813 | |
stefank@5578 | 814 | ReservedSpace rs(size, // size |
stefank@5578 | 815 | alignment, // alignment |
stefank@5578 | 816 | UseLargePages, // large |
stefank@5578 | 817 | NULL, // requested_address |
stefank@5578 | 818 | 0); // noacces_prefix |
stefank@5578 | 819 | |
stefank@5578 | 820 | test_log(" rs.special() == %d", rs.special()); |
stefank@5578 | 821 | |
stefank@5578 | 822 | assert(rs.base() != NULL, "Must be"); |
stefank@5578 | 823 | assert(rs.size() == size, "Must be"); |
stefank@5578 | 824 | |
stefank@5578 | 825 | assert(is_ptr_aligned(rs.base(), alignment), "aligned sizes should always give aligned addresses"); |
stefank@5578 | 826 | assert(is_size_aligned(rs.size(), alignment), "aligned sizes should always give aligned addresses"); |
stefank@5578 | 827 | |
stefank@5578 | 828 | if (rs.special()) { |
stefank@5578 | 829 | small_page_write(rs.base(), size); |
stefank@5578 | 830 | } |
stefank@5578 | 831 | |
stefank@5578 | 832 | release_memory_for_test(rs); |
stefank@5578 | 833 | } |
stefank@5578 | 834 | |
stefank@5578 | 835 | static void test_reserved_space2(size_t size) { |
stefank@5578 | 836 | test_log("test_reserved_space2(%p)", (void*)(uintptr_t)size); |
stefank@5578 | 837 | |
stefank@5578 | 838 | assert(is_size_aligned(size, os::vm_allocation_granularity()), "Must be at least AG aligned"); |
stefank@5578 | 839 | |
stefank@5578 | 840 | ReservedSpace rs(size); |
stefank@5578 | 841 | |
stefank@5578 | 842 | test_log(" rs.special() == %d", rs.special()); |
stefank@5578 | 843 | |
stefank@5578 | 844 | assert(rs.base() != NULL, "Must be"); |
stefank@5578 | 845 | assert(rs.size() == size, "Must be"); |
stefank@5578 | 846 | |
stefank@5578 | 847 | if (rs.special()) { |
stefank@5578 | 848 | small_page_write(rs.base(), size); |
stefank@5578 | 849 | } |
stefank@5578 | 850 | |
stefank@5578 | 851 | release_memory_for_test(rs); |
stefank@5578 | 852 | } |
stefank@5578 | 853 | |
stefank@5578 | 854 | static void test_reserved_space3(size_t size, size_t alignment, bool maybe_large) { |
stefank@5578 | 855 | test_log("test_reserved_space3(%p, %p, %d)", |
stefank@5578 | 856 | (void*)(uintptr_t)size, (void*)(uintptr_t)alignment, maybe_large); |
stefank@5578 | 857 | |
stefank@5578 | 858 | assert(is_size_aligned(size, os::vm_allocation_granularity()), "Must be at least AG aligned"); |
stefank@5578 | 859 | assert(is_size_aligned(size, alignment), "Must be at least aligned against alignment"); |
stefank@5578 | 860 | |
stefank@5578 | 861 | bool large = maybe_large && UseLargePages && size >= os::large_page_size(); |
stefank@5578 | 862 | |
stefank@5578 | 863 | ReservedSpace rs(size, alignment, large, false); |
stefank@5578 | 864 | |
stefank@5578 | 865 | test_log(" rs.special() == %d", rs.special()); |
stefank@5578 | 866 | |
stefank@5578 | 867 | assert(rs.base() != NULL, "Must be"); |
stefank@5578 | 868 | assert(rs.size() == size, "Must be"); |
stefank@5578 | 869 | |
stefank@5578 | 870 | if (rs.special()) { |
stefank@5578 | 871 | small_page_write(rs.base(), size); |
stefank@5578 | 872 | } |
stefank@5578 | 873 | |
stefank@5578 | 874 | release_memory_for_test(rs); |
stefank@5578 | 875 | } |
stefank@5578 | 876 | |
stefank@5578 | 877 | |
stefank@5578 | 878 | static void test_reserved_space1() { |
stefank@5578 | 879 | size_t size = 2 * 1024 * 1024; |
stefank@5578 | 880 | size_t ag = os::vm_allocation_granularity(); |
stefank@5578 | 881 | |
stefank@5578 | 882 | test_reserved_space1(size, ag); |
stefank@5578 | 883 | test_reserved_space1(size * 2, ag); |
stefank@5578 | 884 | test_reserved_space1(size * 10, ag); |
stefank@5578 | 885 | } |
stefank@5578 | 886 | |
stefank@5578 | 887 | static void test_reserved_space2() { |
stefank@5578 | 888 | size_t size = 2 * 1024 * 1024; |
stefank@5578 | 889 | size_t ag = os::vm_allocation_granularity(); |
stefank@5578 | 890 | |
stefank@5578 | 891 | test_reserved_space2(size * 1); |
stefank@5578 | 892 | test_reserved_space2(size * 2); |
stefank@5578 | 893 | test_reserved_space2(size * 10); |
stefank@5578 | 894 | test_reserved_space2(ag); |
stefank@5578 | 895 | test_reserved_space2(size - ag); |
stefank@5578 | 896 | test_reserved_space2(size); |
stefank@5578 | 897 | test_reserved_space2(size + ag); |
stefank@5578 | 898 | test_reserved_space2(size * 2); |
stefank@5578 | 899 | test_reserved_space2(size * 2 - ag); |
stefank@5578 | 900 | test_reserved_space2(size * 2 + ag); |
stefank@5578 | 901 | test_reserved_space2(size * 3); |
stefank@5578 | 902 | test_reserved_space2(size * 3 - ag); |
stefank@5578 | 903 | test_reserved_space2(size * 3 + ag); |
stefank@5578 | 904 | test_reserved_space2(size * 10); |
stefank@5578 | 905 | test_reserved_space2(size * 10 + size / 2); |
stefank@5578 | 906 | } |
stefank@5578 | 907 | |
stefank@5578 | 908 | static void test_reserved_space3() { |
stefank@5578 | 909 | size_t ag = os::vm_allocation_granularity(); |
stefank@5578 | 910 | |
stefank@5578 | 911 | test_reserved_space3(ag, ag , false); |
stefank@5578 | 912 | test_reserved_space3(ag * 2, ag , false); |
stefank@5578 | 913 | test_reserved_space3(ag * 3, ag , false); |
stefank@5578 | 914 | test_reserved_space3(ag * 2, ag * 2, false); |
stefank@5578 | 915 | test_reserved_space3(ag * 4, ag * 2, false); |
stefank@5578 | 916 | test_reserved_space3(ag * 8, ag * 2, false); |
stefank@5578 | 917 | test_reserved_space3(ag * 4, ag * 4, false); |
stefank@5578 | 918 | test_reserved_space3(ag * 8, ag * 4, false); |
stefank@5578 | 919 | test_reserved_space3(ag * 16, ag * 4, false); |
stefank@5578 | 920 | |
stefank@5578 | 921 | if (UseLargePages) { |
stefank@5578 | 922 | size_t lp = os::large_page_size(); |
stefank@5578 | 923 | |
stefank@5578 | 924 | // Without large pages |
stefank@5578 | 925 | test_reserved_space3(lp, ag * 4, false); |
stefank@5578 | 926 | test_reserved_space3(lp * 2, ag * 4, false); |
stefank@5578 | 927 | test_reserved_space3(lp * 4, ag * 4, false); |
stefank@5578 | 928 | test_reserved_space3(lp, lp , false); |
stefank@5578 | 929 | test_reserved_space3(lp * 2, lp , false); |
stefank@5578 | 930 | test_reserved_space3(lp * 3, lp , false); |
stefank@5578 | 931 | test_reserved_space3(lp * 2, lp * 2, false); |
stefank@5578 | 932 | test_reserved_space3(lp * 4, lp * 2, false); |
stefank@5578 | 933 | test_reserved_space3(lp * 8, lp * 2, false); |
stefank@5578 | 934 | |
stefank@5578 | 935 | // With large pages |
stefank@5578 | 936 | test_reserved_space3(lp, ag * 4 , true); |
stefank@5578 | 937 | test_reserved_space3(lp * 2, ag * 4, true); |
stefank@5578 | 938 | test_reserved_space3(lp * 4, ag * 4, true); |
stefank@5578 | 939 | test_reserved_space3(lp, lp , true); |
stefank@5578 | 940 | test_reserved_space3(lp * 2, lp , true); |
stefank@5578 | 941 | test_reserved_space3(lp * 3, lp , true); |
stefank@5578 | 942 | test_reserved_space3(lp * 2, lp * 2, true); |
stefank@5578 | 943 | test_reserved_space3(lp * 4, lp * 2, true); |
stefank@5578 | 944 | test_reserved_space3(lp * 8, lp * 2, true); |
stefank@5578 | 945 | } |
stefank@5578 | 946 | } |
stefank@5578 | 947 | |
stefank@5578 | 948 | static void test_reserved_space() { |
stefank@5578 | 949 | test_reserved_space1(); |
stefank@5578 | 950 | test_reserved_space2(); |
stefank@5578 | 951 | test_reserved_space3(); |
stefank@5578 | 952 | } |
stefank@5578 | 953 | }; |
stefank@5578 | 954 | |
stefank@5578 | 955 | void TestReservedSpace_test() { |
stefank@5578 | 956 | TestReservedSpace::test_reserved_space(); |
stefank@5578 | 957 | } |
stefank@5578 | 958 | |
stefank@5704 | 959 | #define assert_equals(actual, expected) \ |
stefank@5704 | 960 | assert(actual == expected, \ |
stefank@5704 | 961 | err_msg("Got " SIZE_FORMAT " expected " \ |
stefank@5704 | 962 | SIZE_FORMAT, actual, expected)); |
stefank@5704 | 963 | |
stefank@5704 | 964 | #define assert_ge(value1, value2) \ |
stefank@5704 | 965 | assert(value1 >= value2, \ |
stefank@5704 | 966 | err_msg("'" #value1 "': " SIZE_FORMAT " '" \ |
stefank@5704 | 967 | #value2 "': " SIZE_FORMAT, value1, value2)); |
stefank@5704 | 968 | |
stefank@5704 | 969 | #define assert_lt(value1, value2) \ |
stefank@5704 | 970 | assert(value1 < value2, \ |
stefank@5704 | 971 | err_msg("'" #value1 "': " SIZE_FORMAT " '" \ |
stefank@5704 | 972 | #value2 "': " SIZE_FORMAT, value1, value2)); |
stefank@5704 | 973 | |
stefank@5704 | 974 | |
stefank@5704 | 975 | class TestVirtualSpace : AllStatic { |
mgerdin@5859 | 976 | enum TestLargePages { |
mgerdin@5859 | 977 | Default, |
mgerdin@5859 | 978 | Disable, |
mgerdin@5859 | 979 | Reserve, |
mgerdin@5859 | 980 | Commit |
mgerdin@5859 | 981 | }; |
mgerdin@5859 | 982 | |
mgerdin@5859 | 983 | static ReservedSpace reserve_memory(size_t reserve_size_aligned, TestLargePages mode) { |
mgerdin@5859 | 984 | switch(mode) { |
mgerdin@5859 | 985 | default: |
mgerdin@5859 | 986 | case Default: |
mgerdin@5859 | 987 | case Reserve: |
mgerdin@5859 | 988 | return ReservedSpace(reserve_size_aligned); |
mgerdin@5859 | 989 | case Disable: |
mgerdin@5859 | 990 | case Commit: |
mgerdin@5859 | 991 | return ReservedSpace(reserve_size_aligned, |
mgerdin@5859 | 992 | os::vm_allocation_granularity(), |
mgerdin@5859 | 993 | /* large */ false, /* exec */ false); |
mgerdin@5859 | 994 | } |
mgerdin@5859 | 995 | } |
mgerdin@5859 | 996 | |
mgerdin@5859 | 997 | static bool initialize_virtual_space(VirtualSpace& vs, ReservedSpace rs, TestLargePages mode) { |
mgerdin@5859 | 998 | switch(mode) { |
mgerdin@5859 | 999 | default: |
mgerdin@5859 | 1000 | case Default: |
mgerdin@5859 | 1001 | case Reserve: |
mgerdin@5859 | 1002 | return vs.initialize(rs, 0); |
mgerdin@5859 | 1003 | case Disable: |
mgerdin@5859 | 1004 | return vs.initialize_with_granularity(rs, 0, os::vm_page_size()); |
mgerdin@5859 | 1005 | case Commit: |
mgerdin@5859 | 1006 | return vs.initialize_with_granularity(rs, 0, os::page_size_for_region(rs.size(), rs.size(), 1)); |
mgerdin@5859 | 1007 | } |
mgerdin@5859 | 1008 | } |
mgerdin@5859 | 1009 | |
stefank@5704 | 1010 | public: |
mgerdin@5859 | 1011 | static void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size, |
mgerdin@5859 | 1012 | TestLargePages mode = Default) { |
stefank@5704 | 1013 | size_t granularity = os::vm_allocation_granularity(); |
stefank@5704 | 1014 | size_t reserve_size_aligned = align_size_up(reserve_size, granularity); |
stefank@5704 | 1015 | |
mgerdin@5859 | 1016 | ReservedSpace reserved = reserve_memory(reserve_size_aligned, mode); |
stefank@5704 | 1017 | |
stefank@5704 | 1018 | assert(reserved.is_reserved(), "Must be"); |
stefank@5704 | 1019 | |
stefank@5704 | 1020 | VirtualSpace vs; |
mgerdin@5859 | 1021 | bool initialized = initialize_virtual_space(vs, reserved, mode); |
stefank@5704 | 1022 | assert(initialized, "Failed to initialize VirtualSpace"); |
stefank@5704 | 1023 | |
stefank@5704 | 1024 | vs.expand_by(commit_size, false); |
stefank@5704 | 1025 | |
stefank@5704 | 1026 | if (vs.special()) { |
stefank@5704 | 1027 | assert_equals(vs.actual_committed_size(), reserve_size_aligned); |
stefank@5704 | 1028 | } else { |
stefank@5704 | 1029 | assert_ge(vs.actual_committed_size(), commit_size); |
stefank@5704 | 1030 | // Approximate the commit granularity. |
mgerdin@5859 | 1031 | // Make sure that we don't commit using large pages |
mgerdin@5859 | 1032 | // if large pages has been disabled for this VirtualSpace. |
mgerdin@5859 | 1033 | size_t commit_granularity = (mode == Disable || !UseLargePages) ? |
mgerdin@5859 | 1034 | os::vm_page_size() : os::large_page_size(); |
stefank@5704 | 1035 | assert_lt(vs.actual_committed_size(), commit_size + commit_granularity); |
stefank@5704 | 1036 | } |
stefank@5704 | 1037 | |
stefank@5704 | 1038 | reserved.release(); |
stefank@5704 | 1039 | } |
stefank@5704 | 1040 | |
stefank@5704 | 1041 | static void test_virtual_space_actual_committed_space_one_large_page() { |
stefank@5704 | 1042 | if (!UseLargePages) { |
stefank@5704 | 1043 | return; |
stefank@5704 | 1044 | } |
stefank@5704 | 1045 | |
stefank@5704 | 1046 | size_t large_page_size = os::large_page_size(); |
stefank@5704 | 1047 | |
stefank@5704 | 1048 | ReservedSpace reserved(large_page_size, large_page_size, true, false); |
stefank@5704 | 1049 | |
stefank@5704 | 1050 | assert(reserved.is_reserved(), "Must be"); |
stefank@5704 | 1051 | |
stefank@5704 | 1052 | VirtualSpace vs; |
stefank@5704 | 1053 | bool initialized = vs.initialize(reserved, 0); |
stefank@5704 | 1054 | assert(initialized, "Failed to initialize VirtualSpace"); |
stefank@5704 | 1055 | |
stefank@5704 | 1056 | vs.expand_by(large_page_size, false); |
stefank@5704 | 1057 | |
stefank@5704 | 1058 | assert_equals(vs.actual_committed_size(), large_page_size); |
stefank@5704 | 1059 | |
stefank@5704 | 1060 | reserved.release(); |
stefank@5704 | 1061 | } |
stefank@5704 | 1062 | |
stefank@5704 | 1063 | static void test_virtual_space_actual_committed_space() { |
stefank@5704 | 1064 | test_virtual_space_actual_committed_space(4 * K, 0); |
stefank@5704 | 1065 | test_virtual_space_actual_committed_space(4 * K, 4 * K); |
stefank@5704 | 1066 | test_virtual_space_actual_committed_space(8 * K, 0); |
stefank@5704 | 1067 | test_virtual_space_actual_committed_space(8 * K, 4 * K); |
stefank@5704 | 1068 | test_virtual_space_actual_committed_space(8 * K, 8 * K); |
stefank@5704 | 1069 | test_virtual_space_actual_committed_space(12 * K, 0); |
stefank@5704 | 1070 | test_virtual_space_actual_committed_space(12 * K, 4 * K); |
stefank@5704 | 1071 | test_virtual_space_actual_committed_space(12 * K, 8 * K); |
stefank@5704 | 1072 | test_virtual_space_actual_committed_space(12 * K, 12 * K); |
stefank@5704 | 1073 | test_virtual_space_actual_committed_space(64 * K, 0); |
stefank@5704 | 1074 | test_virtual_space_actual_committed_space(64 * K, 32 * K); |
stefank@5704 | 1075 | test_virtual_space_actual_committed_space(64 * K, 64 * K); |
stefank@5704 | 1076 | test_virtual_space_actual_committed_space(2 * M, 0); |
stefank@5704 | 1077 | test_virtual_space_actual_committed_space(2 * M, 4 * K); |
stefank@5704 | 1078 | test_virtual_space_actual_committed_space(2 * M, 64 * K); |
stefank@5704 | 1079 | test_virtual_space_actual_committed_space(2 * M, 1 * M); |
stefank@5704 | 1080 | test_virtual_space_actual_committed_space(2 * M, 2 * M); |
stefank@5704 | 1081 | test_virtual_space_actual_committed_space(10 * M, 0); |
stefank@5704 | 1082 | test_virtual_space_actual_committed_space(10 * M, 4 * K); |
stefank@5704 | 1083 | test_virtual_space_actual_committed_space(10 * M, 8 * K); |
stefank@5704 | 1084 | test_virtual_space_actual_committed_space(10 * M, 1 * M); |
stefank@5704 | 1085 | test_virtual_space_actual_committed_space(10 * M, 2 * M); |
stefank@5704 | 1086 | test_virtual_space_actual_committed_space(10 * M, 5 * M); |
stefank@5704 | 1087 | test_virtual_space_actual_committed_space(10 * M, 10 * M); |
stefank@5704 | 1088 | } |
stefank@5704 | 1089 | |
mgerdin@5859 | 1090 | static void test_virtual_space_disable_large_pages() { |
mgerdin@5859 | 1091 | if (!UseLargePages) { |
mgerdin@5859 | 1092 | return; |
mgerdin@5859 | 1093 | } |
mgerdin@5859 | 1094 | // These test cases verify that if we force VirtualSpace to disable large pages |
mgerdin@5859 | 1095 | test_virtual_space_actual_committed_space(10 * M, 0, Disable); |
mgerdin@5859 | 1096 | test_virtual_space_actual_committed_space(10 * M, 4 * K, Disable); |
mgerdin@5859 | 1097 | test_virtual_space_actual_committed_space(10 * M, 8 * K, Disable); |
mgerdin@5859 | 1098 | test_virtual_space_actual_committed_space(10 * M, 1 * M, Disable); |
mgerdin@5859 | 1099 | test_virtual_space_actual_committed_space(10 * M, 2 * M, Disable); |
mgerdin@5859 | 1100 | test_virtual_space_actual_committed_space(10 * M, 5 * M, Disable); |
mgerdin@5859 | 1101 | test_virtual_space_actual_committed_space(10 * M, 10 * M, Disable); |
mgerdin@5859 | 1102 | |
mgerdin@5859 | 1103 | test_virtual_space_actual_committed_space(10 * M, 0, Reserve); |
mgerdin@5859 | 1104 | test_virtual_space_actual_committed_space(10 * M, 4 * K, Reserve); |
mgerdin@5859 | 1105 | test_virtual_space_actual_committed_space(10 * M, 8 * K, Reserve); |
mgerdin@5859 | 1106 | test_virtual_space_actual_committed_space(10 * M, 1 * M, Reserve); |
mgerdin@5859 | 1107 | test_virtual_space_actual_committed_space(10 * M, 2 * M, Reserve); |
mgerdin@5859 | 1108 | test_virtual_space_actual_committed_space(10 * M, 5 * M, Reserve); |
mgerdin@5859 | 1109 | test_virtual_space_actual_committed_space(10 * M, 10 * M, Reserve); |
mgerdin@5859 | 1110 | |
mgerdin@5859 | 1111 | test_virtual_space_actual_committed_space(10 * M, 0, Commit); |
mgerdin@5859 | 1112 | test_virtual_space_actual_committed_space(10 * M, 4 * K, Commit); |
mgerdin@5859 | 1113 | test_virtual_space_actual_committed_space(10 * M, 8 * K, Commit); |
mgerdin@5859 | 1114 | test_virtual_space_actual_committed_space(10 * M, 1 * M, Commit); |
mgerdin@5859 | 1115 | test_virtual_space_actual_committed_space(10 * M, 2 * M, Commit); |
mgerdin@5859 | 1116 | test_virtual_space_actual_committed_space(10 * M, 5 * M, Commit); |
mgerdin@5859 | 1117 | test_virtual_space_actual_committed_space(10 * M, 10 * M, Commit); |
mgerdin@5859 | 1118 | } |
mgerdin@5859 | 1119 | |
stefank@5704 | 1120 | static void test_virtual_space() { |
stefank@5704 | 1121 | test_virtual_space_actual_committed_space(); |
stefank@5704 | 1122 | test_virtual_space_actual_committed_space_one_large_page(); |
mgerdin@5859 | 1123 | test_virtual_space_disable_large_pages(); |
stefank@5704 | 1124 | } |
stefank@5704 | 1125 | }; |
stefank@5704 | 1126 | |
stefank@5704 | 1127 | void TestVirtualSpace_test() { |
stefank@5704 | 1128 | TestVirtualSpace::test_virtual_space(); |
stefank@5704 | 1129 | } |
stefank@5704 | 1130 | |
stefank@5578 | 1131 | #endif // PRODUCT |
stefank@5578 | 1132 | |
duke@435 | 1133 | #endif |