Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/psVirtualspace.cpp @ 14909:4ca6dc0799b6
Backout jdk9 merge
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Tue, 01 Apr 2014 13:57:07 +0200 |
| parents | bdd155477289 |
| children | 52b4284cb496 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/parallelScavenge/psVirtualspace.hpp" | |
| 27 #include "runtime/os.hpp" | |
| 28 #include "runtime/virtualspace.hpp" | |
| 29 #ifdef TARGET_OS_FAMILY_linux | |
| 30 # include "os_linux.inline.hpp" | |
| 31 #endif | |
| 32 #ifdef TARGET_OS_FAMILY_solaris | |
| 33 # include "os_solaris.inline.hpp" | |
| 34 #endif | |
| 35 #ifdef TARGET_OS_FAMILY_windows | |
| 36 # include "os_windows.inline.hpp" | |
| 37 #endif | |
| 3960 | 38 #ifdef TARGET_OS_FAMILY_bsd |
| 39 # include "os_bsd.inline.hpp" | |
| 40 #endif | |
| 0 | 41 |
| 42 // PSVirtualSpace | |
| 43 | |
| 44 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs, size_t alignment) : | |
| 45 _alignment(alignment) | |
| 46 { | |
| 47 set_reserved(rs); | |
| 48 set_committed(reserved_low_addr(), reserved_low_addr()); | |
| 49 DEBUG_ONLY(verify()); | |
| 50 } | |
| 51 | |
| 52 PSVirtualSpace::PSVirtualSpace(ReservedSpace rs) : | |
| 53 _alignment(os::vm_page_size()) | |
| 54 { | |
| 55 set_reserved(rs); | |
| 56 set_committed(reserved_low_addr(), reserved_low_addr()); | |
| 57 DEBUG_ONLY(verify()); | |
| 58 } | |
| 59 | |
| 60 // Deprecated. | |
| 61 PSVirtualSpace::PSVirtualSpace(): _alignment(os::vm_page_size()) { | |
| 62 } | |
| 63 | |
| 64 // Deprecated. | |
| 65 bool PSVirtualSpace::initialize(ReservedSpace rs, | |
| 66 size_t commit_size) { | |
| 67 set_reserved(rs); | |
| 68 set_committed(reserved_low_addr(), reserved_low_addr()); | |
| 69 | |
| 70 // Commit to initial size. | |
| 71 assert(commit_size <= rs.size(), "commit_size too big"); | |
| 72 bool result = commit_size > 0 ? expand_by(commit_size) : true; | |
| 73 DEBUG_ONLY(verify()); | |
| 74 return result; | |
| 75 } | |
| 76 | |
| 77 PSVirtualSpace::~PSVirtualSpace() { | |
| 78 release(); | |
| 79 } | |
| 80 | |
| 81 bool PSVirtualSpace::contains(void* p) const { | |
| 82 char* const cp = (char*)p; | |
| 83 return cp >= committed_low_addr() && cp < committed_high_addr(); | |
| 84 } | |
| 85 | |
| 86 void PSVirtualSpace::release() { | |
| 87 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
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88 // This may not release memory it didn't reserve. |
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89 // Use rs.release() to release the underlying memory instead. |
| 0 | 90 _reserved_low_addr = _reserved_high_addr = NULL; |
| 91 _committed_low_addr = _committed_high_addr = NULL; | |
| 92 _special = false; | |
| 93 } | |
| 94 | |
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95 bool PSVirtualSpace::expand_by(size_t bytes) { |
| 0 | 96 assert(is_aligned(bytes), "arg not aligned"); |
| 97 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 98 | |
| 99 if (uncommitted_size() < bytes) { | |
| 100 return false; | |
| 101 } | |
| 102 | |
| 103 char* const base_addr = committed_high_addr(); | |
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104 bool result = special() || |
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105 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
| 0 | 106 if (result) { |
| 107 _committed_high_addr += bytes; | |
| 108 } | |
| 109 | |
| 110 return result; | |
| 111 } | |
| 112 | |
| 113 bool PSVirtualSpace::shrink_by(size_t bytes) { | |
| 114 assert(is_aligned(bytes), "arg not aligned"); | |
| 115 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 116 | |
| 117 if (committed_size() < bytes) { | |
| 118 return false; | |
| 119 } | |
| 120 | |
| 121 char* const base_addr = committed_high_addr() - bytes; | |
| 122 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
| 123 if (result) { | |
| 124 _committed_high_addr -= bytes; | |
| 125 } | |
| 126 | |
| 127 return result; | |
| 128 } | |
| 129 | |
| 130 size_t | |
| 131 PSVirtualSpace::expand_into(PSVirtualSpace* other_space, size_t bytes) { | |
| 132 assert(is_aligned(bytes), "arg not aligned"); | |
| 133 assert(grows_up(), "this space must grow up"); | |
| 134 assert(other_space->grows_down(), "other space must grow down"); | |
| 135 assert(reserved_high_addr() == other_space->reserved_low_addr(), | |
| 136 "spaces not contiguous"); | |
| 137 assert(special() == other_space->special(), "one space is special, the other is not"); | |
| 138 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 139 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
| 140 | |
| 141 size_t bytes_needed = bytes; | |
| 142 | |
| 143 // First use the uncommitted region in this space. | |
| 144 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
| 145 if (tmp_bytes > 0) { | |
| 146 if (expand_by(tmp_bytes)) { | |
| 147 bytes_needed -= tmp_bytes; | |
| 148 } else { | |
| 149 return 0; | |
| 150 } | |
| 151 } | |
| 152 | |
| 153 // Next take from the uncommitted region in the other space, and commit it. | |
| 154 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
| 155 if (tmp_bytes > 0) { | |
| 156 char* const commit_base = committed_high_addr(); | |
| 157 if (other_space->special() || | |
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158 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
| 0 | 159 // Reduce the reserved region in the other space. |
| 160 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
| 161 other_space->reserved_high_addr(), | |
| 162 other_space->special()); | |
| 163 | |
| 164 // Grow both reserved and committed in this space. | |
| 165 _reserved_high_addr += tmp_bytes; | |
| 166 _committed_high_addr += tmp_bytes; | |
| 167 bytes_needed -= tmp_bytes; | |
| 168 } else { | |
| 169 return bytes - bytes_needed; | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 // Finally take from the already committed region in the other space. | |
| 174 tmp_bytes = bytes_needed; | |
| 175 if (tmp_bytes > 0) { | |
| 176 // Reduce both committed and reserved in the other space. | |
| 177 other_space->set_committed(other_space->committed_low_addr() + tmp_bytes, | |
| 178 other_space->committed_high_addr()); | |
| 179 other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, | |
| 180 other_space->reserved_high_addr(), | |
| 181 other_space->special()); | |
| 182 | |
| 183 // Grow both reserved and committed in this space. | |
| 184 _reserved_high_addr += tmp_bytes; | |
| 185 _committed_high_addr += tmp_bytes; | |
| 186 } | |
| 187 | |
| 188 return bytes; | |
| 189 } | |
| 190 | |
| 191 #ifndef PRODUCT | |
| 192 bool PSVirtualSpace::is_aligned(size_t value, size_t align) { | |
| 193 const size_t tmp_value = value + align - 1; | |
| 194 const size_t mask = ~(align - 1); | |
| 195 return (tmp_value & mask) == value; | |
| 196 } | |
| 197 | |
| 198 bool PSVirtualSpace::is_aligned(size_t value) const { | |
| 199 return is_aligned(value, alignment()); | |
| 200 } | |
| 201 | |
| 202 bool PSVirtualSpace::is_aligned(char* value) const { | |
| 203 return is_aligned((size_t)value); | |
| 204 } | |
| 205 | |
| 206 void PSVirtualSpace::verify() const { | |
| 207 assert(is_aligned(alignment(), os::vm_page_size()), "bad alignment"); | |
| 208 assert(is_aligned(reserved_low_addr()), "bad reserved_low_addr"); | |
| 209 assert(is_aligned(reserved_high_addr()), "bad reserved_high_addr"); | |
| 210 assert(is_aligned(committed_low_addr()), "bad committed_low_addr"); | |
| 211 assert(is_aligned(committed_high_addr()), "bad committed_high_addr"); | |
| 212 | |
| 213 // Reserved region must be non-empty or both addrs must be 0. | |
| 214 assert(reserved_low_addr() < reserved_high_addr() || | |
| 215 reserved_low_addr() == NULL && reserved_high_addr() == NULL, | |
| 216 "bad reserved addrs"); | |
| 217 assert(committed_low_addr() <= committed_high_addr(), "bad committed addrs"); | |
| 218 | |
| 219 if (grows_up()) { | |
| 220 assert(reserved_low_addr() == committed_low_addr(), "bad low addrs"); | |
| 221 assert(reserved_high_addr() >= committed_high_addr(), "bad high addrs"); | |
| 222 } else { | |
| 223 assert(reserved_high_addr() == committed_high_addr(), "bad high addrs"); | |
| 224 assert(reserved_low_addr() <= committed_low_addr(), "bad low addrs"); | |
| 225 } | |
| 226 } | |
| 227 | |
| 228 void PSVirtualSpace::print() const { | |
| 229 gclog_or_tty->print_cr("virtual space [" PTR_FORMAT "]: alignment=" | |
| 230 SIZE_FORMAT "K grows %s%s", | |
| 231 this, alignment() / K, grows_up() ? "up" : "down", | |
| 232 special() ? " (pinned in memory)" : ""); | |
| 233 gclog_or_tty->print_cr(" reserved=" SIZE_FORMAT "K" | |
| 234 " [" PTR_FORMAT "," PTR_FORMAT "]" | |
| 235 " committed=" SIZE_FORMAT "K" | |
| 236 " [" PTR_FORMAT "," PTR_FORMAT "]", | |
| 237 reserved_size() / K, | |
| 238 reserved_low_addr(), reserved_high_addr(), | |
| 239 committed_size() / K, | |
| 240 committed_low_addr(), committed_high_addr()); | |
| 241 } | |
| 242 #endif // #ifndef PRODUCT | |
| 243 | |
| 244 void PSVirtualSpace::print_space_boundaries_on(outputStream* st) const { | |
| 245 st->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ")", | |
| 246 low_boundary(), high(), high_boundary()); | |
| 247 } | |
| 248 | |
| 249 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs, | |
| 250 size_t alignment) : | |
| 251 PSVirtualSpace(alignment) | |
| 252 { | |
| 253 set_reserved(rs); | |
| 254 set_committed(reserved_high_addr(), reserved_high_addr()); | |
| 255 DEBUG_ONLY(verify()); | |
| 256 } | |
| 257 | |
| 258 PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs) { | |
| 259 set_reserved(rs); | |
| 260 set_committed(reserved_high_addr(), reserved_high_addr()); | |
| 261 DEBUG_ONLY(verify()); | |
| 262 } | |
| 263 | |
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264 bool PSVirtualSpaceHighToLow::expand_by(size_t bytes) { |
| 0 | 265 assert(is_aligned(bytes), "arg not aligned"); |
| 266 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 267 | |
| 268 if (uncommitted_size() < bytes) { | |
| 269 return false; | |
| 270 } | |
| 271 | |
| 272 char* const base_addr = committed_low_addr() - bytes; | |
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273 bool result = special() || |
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274 os::commit_memory(base_addr, bytes, alignment(), !ExecMem); |
| 0 | 275 if (result) { |
| 276 _committed_low_addr -= bytes; | |
| 277 } | |
| 278 | |
| 279 return result; | |
| 280 } | |
| 281 | |
| 282 bool PSVirtualSpaceHighToLow::shrink_by(size_t bytes) { | |
| 283 assert(is_aligned(bytes), "arg not aligned"); | |
| 284 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 285 | |
| 286 if (committed_size() < bytes) { | |
| 287 return false; | |
| 288 } | |
| 289 | |
| 290 char* const base_addr = committed_low_addr(); | |
| 291 bool result = special() || os::uncommit_memory(base_addr, bytes); | |
| 292 if (result) { | |
| 293 _committed_low_addr += bytes; | |
| 294 } | |
| 295 | |
| 296 return result; | |
| 297 } | |
| 298 | |
| 299 size_t PSVirtualSpaceHighToLow::expand_into(PSVirtualSpace* other_space, | |
| 300 size_t bytes) { | |
| 301 assert(is_aligned(bytes), "arg not aligned"); | |
| 302 assert(grows_down(), "this space must grow down"); | |
| 303 assert(other_space->grows_up(), "other space must grow up"); | |
| 304 assert(reserved_low_addr() == other_space->reserved_high_addr(), | |
| 305 "spaces not contiguous"); | |
| 306 assert(special() == other_space->special(), "one space is special in memory, the other is not"); | |
| 307 DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); | |
| 308 DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); | |
| 309 | |
| 310 size_t bytes_needed = bytes; | |
| 311 | |
| 312 // First use the uncommitted region in this space. | |
| 313 size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); | |
| 314 if (tmp_bytes > 0) { | |
| 315 if (expand_by(tmp_bytes)) { | |
| 316 bytes_needed -= tmp_bytes; | |
| 317 } else { | |
| 318 return 0; | |
| 319 } | |
| 320 } | |
| 321 | |
| 322 // Next take from the uncommitted region in the other space, and commit it. | |
| 323 tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); | |
| 324 if (tmp_bytes > 0) { | |
| 325 char* const commit_base = committed_low_addr() - tmp_bytes; | |
| 326 if (other_space->special() || | |
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327 os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { |
| 0 | 328 // Reduce the reserved region in the other space. |
| 329 other_space->set_reserved(other_space->reserved_low_addr(), | |
| 330 other_space->reserved_high_addr() - tmp_bytes, | |
| 331 other_space->special()); | |
| 332 | |
| 333 // Grow both reserved and committed in this space. | |
| 334 _reserved_low_addr -= tmp_bytes; | |
| 335 _committed_low_addr -= tmp_bytes; | |
| 336 bytes_needed -= tmp_bytes; | |
| 337 } else { | |
| 338 return bytes - bytes_needed; | |
| 339 } | |
| 340 } | |
| 341 | |
| 342 // Finally take from the already committed region in the other space. | |
| 343 tmp_bytes = bytes_needed; | |
| 344 if (tmp_bytes > 0) { | |
| 345 // Reduce both committed and reserved in the other space. | |
| 346 other_space->set_committed(other_space->committed_low_addr(), | |
| 347 other_space->committed_high_addr() - tmp_bytes); | |
| 348 other_space->set_reserved(other_space->reserved_low_addr(), | |
| 349 other_space->reserved_high_addr() - tmp_bytes, | |
| 350 other_space->special()); | |
| 351 | |
| 352 // Grow both reserved and committed in this space. | |
| 353 _reserved_low_addr -= tmp_bytes; | |
| 354 _committed_low_addr -= tmp_bytes; | |
| 355 } | |
| 356 | |
| 357 return bytes; | |
| 358 } | |
| 359 | |
| 360 void | |
| 361 PSVirtualSpaceHighToLow::print_space_boundaries_on(outputStream* st) const { | |
| 362 st->print_cr(" (" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT "]", | |
| 363 high_boundary(), low(), low_boundary()); | |
| 364 } |