Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/psVirtualspace.cpp @ 18041:52b4284cb496
Merge with jdk8u20-b26
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 16:02:50 +0200 |
| parents | 4ca6dc0799b6 78bbf4d43a14 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 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 "gc_implementation/parallelScavenge/psVirtualspace.hpp" | |
| 27 #include "runtime/os.hpp" | |
| 28 #include "runtime/virtualspace.hpp" | |
| 29 #ifdef TARGET_OS_FAMILY_linux | |
| 30 # include "os_linux.inline.hpp" | |
| 31 #endif | |
| 32 #ifdef TARGET_OS_FAMILY_solaris | |
| 33 # include "os_solaris.inline.hpp" | |
| 34 #endif | |
| 35 #ifdef TARGET_OS_FAMILY_windows | |
| 36 # include "os_windows.inline.hpp" | |
| 37 #endif | |
| 14411 | 38 #ifdef TARGET_OS_FAMILY_aix |
| 39 # include "os_aix.inline.hpp" | |
| 40 #endif | |
| 3960 | 41 #ifdef TARGET_OS_FAMILY_bsd |
| 42 # include "os_bsd.inline.hpp" | |
| 43 #endif | |
| 0 | 44 |
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45 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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46 |
| 0 | 47 // PSVirtualSpace |
| 48 | |
| 49 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs, size_t alignment) : | |
| 50 _alignment(alignment) | |
| 51 { | |
| 52 set_reserved(rs); | |
| 53 set_committed(reserved_low_addr(), reserved_low_addr()); | |
| 54 DEBUG_ONLY(verify()); | |
| 55 } | |
| 56 | |
| 57 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs) : | |
| 58 _alignment(os::vm_page_size()) | |
| 59 { | |
| 60 set_reserved(rs); | |
| 61 set_committed(reserved_low_addr(), reserved_low_addr()); | |
| 62 DEBUG_ONLY(verify()); | |
| 63 } | |
| 64 | |
| 65 // Deprecated. | |
| 66 PSVirtualSpace::PSVirtualSpace(): _alignment(os::vm_page_size()) { | |
| 67 } | |
| 68 | |
| 69 // Deprecated. | |
| 70 bool PSVirtualSpace::initialize(ReservedSpace rs, | |
| 71 size_t commit_size) { | |
| 72 set_reserved(rs); | |
| 73 set_committed(reserved_low_addr(), reserved_low_addr()); | |
| 74 | |
| 75 // Commit to initial size. | |
| 76 assert(commit_size <= rs.size(), "commit_size too big"); | |
| 77 bool result = commit_size > 0 ? expand_by(commit_size) : true; | |
| 78 DEBUG_ONLY(verify()); | |
| 79 return result; | |
| 80 } | |
| 81 | |
| 82 PSVirtualSpace::~PSVirtualSpace() { | |
| 83 release(); | |
| 84 } | |
| 85 | |
| 86 bool PSVirtualSpace::contains(void* p) const { | |
| 87 char* const cp = (char*)p; | |
| 88 return cp >= committed_low_addr() && cp < committed_high_addr(); | |
| 89 } | |
| 90 | |
| 91 void PSVirtualSpace::release() { | |
| 92 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
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93 // This may not release memory it didn't reserve. |
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94 // Use rs.release() to release the underlying memory instead. |
| 0 | 95 _reserved_low_addr = _reserved_high_addr = NULL; |
| 96 _committed_low_addr = _committed_high_addr = NULL; | |
| 97 _special = false; | |
| 98 } | |
| 99 | |
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100 bool PSVirtualSpace::expand_by(size_t bytes) { |
| 0 | 101 assert(is_aligned(bytes), "arg not aligned"); |
| 102 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 103 | |
| 104 if (uncommitted_size() < bytes) { | |
| 105 return false; | |
| 106 } | |
| 107 | |
| 108 char* const base_addr = committed_high_addr(); | |
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109 bool result = special() || |
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110 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
| 0 | 111 if (result) { |
| 112 _committed_high_addr += bytes; | |
| 113 } | |
| 114 | |
| 115 return result; | |
| 116 } | |
| 117 | |
| 118 bool PSVirtualSpace::shrink_by(size_t bytes) { | |
| 119 assert(is_aligned(bytes), "arg not aligned"); | |
| 120 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 121 | |
| 122 if (committed_size() < bytes) { | |
| 123 return false; | |
| 124 } | |
| 125 | |
| 126 char* const base_addr = committed_high_addr() - bytes; | |
| 127 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
| 128 if (result) { | |
| 129 _committed_high_addr -= bytes; | |
| 130 } | |
| 131 | |
| 132 return result; | |
| 133 } | |
| 134 | |
| 135 size_t | |
| 136 PSVirtualSpace::expand_into(PSVirtualSpace* other_space, size_t bytes) { | |
| 137 assert(is_aligned(bytes), "arg not aligned"); | |
| 138 assert(grows_up(), "this space must grow up"); | |
| 139 assert(other_space->grows_down(), "other space must grow down"); | |
| 140 assert(reserved_high_addr() == other_space->reserved_low_addr(), | |
| 141 "spaces not contiguous"); | |
| 142 assert(special() == other_space->special(), "one space is special, the other is not"); | |
| 143 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 144 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
| 145 | |
| 146 size_t bytes_needed = bytes; | |
| 147 | |
| 148 // First use the uncommitted region in this space. | |
| 149 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
| 150 if (tmp_bytes > 0) { | |
| 151 if (expand_by(tmp_bytes)) { | |
| 152 bytes_needed -= tmp_bytes; | |
| 153 } else { | |
| 154 return 0; | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 // Next take from the uncommitted region in the other space, and commit it. | |
| 159 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
| 160 if (tmp_bytes > 0) { | |
| 161 char* const commit_base = committed_high_addr(); | |
| 162 if (other_space->special() || | |
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163 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
| 0 | 164 // Reduce the reserved region in the other space. |
| 165 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
| 166 other_space->reserved_high_addr(), | |
| 167 other_space->special()); | |
| 168 | |
| 169 // Grow both reserved and committed in this space. | |
| 170 _reserved_high_addr += tmp_bytes; | |
| 171 _committed_high_addr += tmp_bytes; | |
| 172 bytes_needed -= tmp_bytes; | |
| 173 } else { | |
| 174 return bytes - bytes_needed; | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 // Finally take from the already committed region in the other space. | |
| 179 tmp_bytes = bytes_needed; | |
| 180 if (tmp_bytes > 0) { | |
| 181 // Reduce both committed and reserved in the other space. | |
| 182 other_space->set_committed(other_space->committed_low_addr() + tmp_bytes, | |
| 183 other_space->committed_high_addr()); | |
| 184 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
| 185 other_space->reserved_high_addr(), | |
| 186 other_space->special()); | |
| 187 | |
| 188 // Grow both reserved and committed in this space. | |
| 189 _reserved_high_addr += tmp_bytes; | |
| 190 _committed_high_addr += tmp_bytes; | |
| 191 } | |
| 192 | |
| 193 return bytes; | |
| 194 } | |
| 195 | |
| 196 #ifndef PRODUCT | |
| 197 bool PSVirtualSpace::is_aligned(size_t value, size_t align) { | |
| 198 const size_t tmp_value = value + align - 1; | |
| 199 const size_t mask = ~(align - 1); | |
| 200 return (tmp_value & mask) == value; | |
| 201 } | |
| 202 | |
| 203 bool PSVirtualSpace::is_aligned(size_t value) const { | |
| 204 return is_aligned(value, alignment()); | |
| 205 } | |
| 206 | |
| 207 bool PSVirtualSpace::is_aligned(char* value) const { | |
| 208 return is_aligned((size_t)value); | |
| 209 } | |
| 210 | |
| 211 void PSVirtualSpace::verify() const { | |
| 212 assert(is_aligned(alignment(), os::vm_page_size()), "bad alignment"); | |
| 213 assert(is_aligned(reserved_low_addr()), "bad reserved_low_addr"); | |
| 214 assert(is_aligned(reserved_high_addr()), "bad reserved_high_addr"); | |
| 215 assert(is_aligned(committed_low_addr()), "bad committed_low_addr"); | |
| 216 assert(is_aligned(committed_high_addr()), "bad committed_high_addr"); | |
| 217 | |
| 218 // Reserved region must be non-empty or both addrs must be 0. | |
| 219 assert(reserved_low_addr() < reserved_high_addr() || | |
| 220 reserved_low_addr() == NULL && reserved_high_addr() == NULL, | |
| 221 "bad reserved addrs"); | |
| 222 assert(committed_low_addr() <= committed_high_addr(), "bad committed addrs"); | |
| 223 | |
| 224 if (grows_up()) { | |
| 225 assert(reserved_low_addr() == committed_low_addr(), "bad low addrs"); | |
| 226 assert(reserved_high_addr() >= committed_high_addr(), "bad high addrs"); | |
| 227 } else { | |
| 228 assert(reserved_high_addr() == committed_high_addr(), "bad high addrs"); | |
| 229 assert(reserved_low_addr() <= committed_low_addr(), "bad low addrs"); | |
| 230 } | |
| 231 } | |
| 232 | |
| 233 void PSVirtualSpace::print() const { | |
| 234 gclog_or_tty->print_cr("virtual space [" PTR_FORMAT "]: alignment=" | |
| 235 SIZE_FORMAT "K grows %s%s", | |
| 236 this, alignment() / K, grows_up() ? "up" : "down", | |
| 237 special() ? " (pinned in memory)" : ""); | |
| 238 gclog_or_tty->print_cr(" reserved=" SIZE_FORMAT "K" | |
| 239 " [" PTR_FORMAT "," PTR_FORMAT "]" | |
| 240 " committed=" SIZE_FORMAT "K" | |
| 241 " [" PTR_FORMAT "," PTR_FORMAT "]", | |
| 242 reserved_size() / K, | |
| 243 reserved_low_addr(), reserved_high_addr(), | |
| 244 committed_size() / K, | |
| 245 committed_low_addr(), committed_high_addr()); | |
| 246 } | |
| 247 #endif // #ifndef PRODUCT | |
| 248 | |
| 249 void PSVirtualSpace::print_space_boundaries_on(outputStream* st) const { | |
| 250 st->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ")", | |
| 251 low_boundary(), high(), high_boundary()); | |
| 252 } | |
| 253 | |
| 254 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs, | |
| 255 size_t alignment) : | |
| 256 PSVirtualSpace(alignment) | |
| 257 { | |
| 258 set_reserved(rs); | |
| 259 set_committed(reserved_high_addr(), reserved_high_addr()); | |
| 260 DEBUG_ONLY(verify()); | |
| 261 } | |
| 262 | |
| 263 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs) { | |
| 264 set_reserved(rs); | |
| 265 set_committed(reserved_high_addr(), reserved_high_addr()); | |
| 266 DEBUG_ONLY(verify()); | |
| 267 } | |
| 268 | |
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269 bool PSVirtualSpaceHighToLow::expand_by(size_t bytes) { |
| 0 | 270 assert(is_aligned(bytes), "arg not aligned"); |
| 271 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 272 | |
| 273 if (uncommitted_size() < bytes) { | |
| 274 return false; | |
| 275 } | |
| 276 | |
| 277 char* const base_addr = committed_low_addr() - bytes; | |
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278 bool result = special() || |
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279 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
| 0 | 280 if (result) { |
| 281 _committed_low_addr -= bytes; | |
| 282 } | |
| 283 | |
| 284 return result; | |
| 285 } | |
| 286 | |
| 287 bool PSVirtualSpaceHighToLow::shrink_by(size_t bytes) { | |
| 288 assert(is_aligned(bytes), "arg not aligned"); | |
| 289 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 290 | |
| 291 if (committed_size() < bytes) { | |
| 292 return false; | |
| 293 } | |
| 294 | |
| 295 char* const base_addr = committed_low_addr(); | |
| 296 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
| 297 if (result) { | |
| 298 _committed_low_addr += bytes; | |
| 299 } | |
| 300 | |
| 301 return result; | |
| 302 } | |
| 303 | |
| 304 size_t PSVirtualSpaceHighToLow::expand_into(PSVirtualSpace* other_space, | |
| 305 size_t bytes) { | |
| 306 assert(is_aligned(bytes), "arg not aligned"); | |
| 307 assert(grows_down(), "this space must grow down"); | |
| 308 assert(other_space->grows_up(), "other space must grow up"); | |
| 309 assert(reserved_low_addr() == other_space->reserved_high_addr(), | |
| 310 "spaces not contiguous"); | |
| 311 assert(special() == other_space->special(), "one space is special in memory, the other is not"); | |
| 312 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 313 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
| 314 | |
| 315 size_t bytes_needed = bytes; | |
| 316 | |
| 317 // First use the uncommitted region in this space. | |
| 318 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
| 319 if (tmp_bytes > 0) { | |
| 320 if (expand_by(tmp_bytes)) { | |
| 321 bytes_needed -= tmp_bytes; | |
| 322 } else { | |
| 323 return 0; | |
| 324 } | |
| 325 } | |
| 326 | |
| 327 // Next take from the uncommitted region in the other space, and commit it. | |
| 328 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
| 329 if (tmp_bytes > 0) { | |
| 330 char* const commit_base = committed_low_addr() - tmp_bytes; | |
| 331 if (other_space->special() || | |
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332 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
| 0 | 333 // Reduce the reserved region in the other space. |
| 334 other_space->set_reserved(other_space->reserved_low_addr(), | |
| 335 other_space->reserved_high_addr() - tmp_bytes, | |
| 336 other_space->special()); | |
| 337 | |
| 338 // Grow both reserved and committed in this space. | |
| 339 _reserved_low_addr -= tmp_bytes; | |
| 340 _committed_low_addr -= tmp_bytes; | |
| 341 bytes_needed -= tmp_bytes; | |
| 342 } else { | |
| 343 return bytes - bytes_needed; | |
| 344 } | |
| 345 } | |
| 346 | |
| 347 // Finally take from the already committed region in the other space. | |
| 348 tmp_bytes = bytes_needed; | |
| 349 if (tmp_bytes > 0) { | |
| 350 // Reduce both committed and reserved in the other space. | |
| 351 other_space->set_committed(other_space->committed_low_addr(), | |
| 352 other_space->committed_high_addr() - tmp_bytes); | |
| 353 other_space->set_reserved(other_space->reserved_low_addr(), | |
| 354 other_space->reserved_high_addr() - tmp_bytes, | |
| 355 other_space->special()); | |
| 356 | |
| 357 // Grow both reserved and committed in this space. | |
| 358 _reserved_low_addr -= tmp_bytes; | |
| 359 _committed_low_addr -= tmp_bytes; | |
| 360 } | |
| 361 | |
| 362 return bytes; | |
| 363 } | |
| 364 | |
| 365 void | |
| 366 PSVirtualSpaceHighToLow::print_space_boundaries_on(outputStream* st) const { | |
| 367 st->print_cr(" (" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT "]", | |
| 368 high_boundary(), low(), low_boundary()); | |
| 369 } |