Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions.cpp @ 1571:2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
Summary: Added new product ObjectAlignmentInBytes flag to control object alignment.
Reviewed-by: twisti, ysr, iveresov
| author | kvn |
|---|---|
| date | Thu, 27 May 2010 18:01:56 -0700 |
| parents | d1605aabd0a1 |
| children | e9ff18c4ace7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_globalDefinitions.cpp.incl" | |
|
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27 // Basic error support |
| 0 | 28 |
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29 // Info for oops within a java object. Defaults are zero so |
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30 // things will break badly if incorrectly initialized. |
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31 int heapOopSize = 0; |
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32 int LogBytesPerHeapOop = 0; |
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33 int LogBitsPerHeapOop = 0; |
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34 int BytesPerHeapOop = 0; |
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35 int BitsPerHeapOop = 0; |
| 0 | 36 |
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37 // Object alignment, in units of HeapWords. |
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38 // Defaults are -1 so things will break badly if incorrectly initialized. |
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39 int MinObjAlignment = -1; |
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40 int MinObjAlignmentInBytes = -1; |
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41 int MinObjAlignmentInBytesMask = 0; |
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42 |
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43 int LogMinObjAlignment = -1; |
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44 int LogMinObjAlignmentInBytes = -1; |
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45 |
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46 // Oop encoding heap max |
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47 uint64_t OopEncodingHeapMax = 0; |
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48 |
| 0 | 49 void basic_fatal(const char* msg) { |
| 50 fatal(msg); | |
| 51 } | |
| 52 | |
| 53 // Something to help porters sleep at night | |
| 54 | |
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55 void basic_types_init() { |
| 0 | 56 #ifdef ASSERT |
| 57 #ifdef _LP64 | |
| 58 assert(min_intx == (intx)CONST64(0x8000000000000000), "correct constant"); | |
| 59 assert(max_intx == CONST64(0x7FFFFFFFFFFFFFFF), "correct constant"); | |
| 60 assert(max_uintx == CONST64(0xFFFFFFFFFFFFFFFF), "correct constant"); | |
| 61 assert( 8 == sizeof( intx), "wrong size for basic type"); | |
| 62 assert( 8 == sizeof( jobject), "wrong size for basic type"); | |
| 63 #else | |
| 64 assert(min_intx == (intx)0x80000000, "correct constant"); | |
| 65 assert(max_intx == 0x7FFFFFFF, "correct constant"); | |
| 66 assert(max_uintx == 0xFFFFFFFF, "correct constant"); | |
| 67 assert( 4 == sizeof( intx), "wrong size for basic type"); | |
| 68 assert( 4 == sizeof( jobject), "wrong size for basic type"); | |
| 69 #endif | |
| 70 assert( (~max_juint) == 0, "max_juint has all its bits"); | |
| 71 assert( (~max_uintx) == 0, "max_uintx has all its bits"); | |
| 72 assert( (~max_julong) == 0, "max_julong has all its bits"); | |
| 73 assert( 1 == sizeof( jbyte), "wrong size for basic type"); | |
| 74 assert( 2 == sizeof( jchar), "wrong size for basic type"); | |
| 75 assert( 2 == sizeof( jshort), "wrong size for basic type"); | |
| 76 assert( 4 == sizeof( juint), "wrong size for basic type"); | |
| 77 assert( 4 == sizeof( jint), "wrong size for basic type"); | |
| 78 assert( 1 == sizeof( jboolean), "wrong size for basic type"); | |
| 79 assert( 8 == sizeof( jlong), "wrong size for basic type"); | |
| 80 assert( 4 == sizeof( jfloat), "wrong size for basic type"); | |
| 81 assert( 8 == sizeof( jdouble), "wrong size for basic type"); | |
| 82 assert( 1 == sizeof( u1), "wrong size for basic type"); | |
| 83 assert( 2 == sizeof( u2), "wrong size for basic type"); | |
| 84 assert( 4 == sizeof( u4), "wrong size for basic type"); | |
| 85 | |
| 86 int num_type_chars = 0; | |
| 87 for (int i = 0; i < 99; i++) { | |
| 88 if (type2char((BasicType)i) != 0) { | |
| 89 assert(char2type(type2char((BasicType)i)) == i, "proper inverses"); | |
| 90 num_type_chars++; | |
| 91 } | |
| 92 } | |
| 93 assert(num_type_chars == 11, "must have tested the right number of mappings"); | |
| 94 assert(char2type(0) == T_ILLEGAL, "correct illegality"); | |
| 95 | |
| 96 { | |
| 97 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
| 98 BasicType vt = (BasicType)i; | |
| 99 BasicType ft = type2field[vt]; | |
| 100 switch (vt) { | |
| 101 // the following types might plausibly show up in memory layouts: | |
| 102 case T_BOOLEAN: | |
| 103 case T_BYTE: | |
| 104 case T_CHAR: | |
| 105 case T_SHORT: | |
| 106 case T_INT: | |
| 107 case T_FLOAT: | |
| 108 case T_DOUBLE: | |
| 109 case T_LONG: | |
| 110 case T_OBJECT: | |
| 111 case T_ADDRESS: // random raw pointer | |
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112 case T_NARROWOOP: // compressed pointer |
| 0 | 113 case T_CONFLICT: // might as well support a bottom type |
| 114 case T_VOID: // padding or other unaddressed word | |
| 115 // layout type must map to itself | |
| 116 assert(vt == ft, ""); | |
| 117 break; | |
| 118 default: | |
| 119 // non-layout type must map to a (different) layout type | |
| 120 assert(vt != ft, ""); | |
| 121 assert(ft == type2field[ft], ""); | |
| 122 } | |
| 123 // every type must map to same-sized layout type: | |
| 124 assert(type2size[vt] == type2size[ft], ""); | |
| 125 } | |
| 126 } | |
| 127 // These are assumed, e.g., when filling HeapWords with juints. | |
| 128 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2"); | |
| 129 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2"); | |
| 130 assert((size_t)HeapWordSize >= sizeof(juint), | |
| 131 "HeapWord should be at least as large as juint"); | |
| 132 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer"); | |
| 133 #endif | |
| 134 | |
| 135 if( JavaPriority1_To_OSPriority != -1 ) | |
| 136 os::java_to_os_priority[1] = JavaPriority1_To_OSPriority; | |
| 137 if( JavaPriority2_To_OSPriority != -1 ) | |
| 138 os::java_to_os_priority[2] = JavaPriority2_To_OSPriority; | |
| 139 if( JavaPriority3_To_OSPriority != -1 ) | |
| 140 os::java_to_os_priority[3] = JavaPriority3_To_OSPriority; | |
| 141 if( JavaPriority4_To_OSPriority != -1 ) | |
| 142 os::java_to_os_priority[4] = JavaPriority4_To_OSPriority; | |
| 143 if( JavaPriority5_To_OSPriority != -1 ) | |
| 144 os::java_to_os_priority[5] = JavaPriority5_To_OSPriority; | |
| 145 if( JavaPriority6_To_OSPriority != -1 ) | |
| 146 os::java_to_os_priority[6] = JavaPriority6_To_OSPriority; | |
| 147 if( JavaPriority7_To_OSPriority != -1 ) | |
| 148 os::java_to_os_priority[7] = JavaPriority7_To_OSPriority; | |
| 149 if( JavaPriority8_To_OSPriority != -1 ) | |
| 150 os::java_to_os_priority[8] = JavaPriority8_To_OSPriority; | |
| 151 if( JavaPriority9_To_OSPriority != -1 ) | |
| 152 os::java_to_os_priority[9] = JavaPriority9_To_OSPriority; | |
| 153 if(JavaPriority10_To_OSPriority != -1 ) | |
| 154 os::java_to_os_priority[10] = JavaPriority10_To_OSPriority; | |
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155 |
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156 // Set the size of basic types here (after argument parsing but before |
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157 // stub generation). |
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158 if (UseCompressedOops) { |
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159 // Size info for oops within java objects is fixed |
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160 heapOopSize = jintSize; |
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161 LogBytesPerHeapOop = LogBytesPerInt; |
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162 LogBitsPerHeapOop = LogBitsPerInt; |
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163 BytesPerHeapOop = BytesPerInt; |
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164 BitsPerHeapOop = BitsPerInt; |
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165 } else { |
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166 heapOopSize = oopSize; |
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167 LogBytesPerHeapOop = LogBytesPerWord; |
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168 LogBitsPerHeapOop = LogBitsPerWord; |
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169 BytesPerHeapOop = BytesPerWord; |
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170 BitsPerHeapOop = BitsPerWord; |
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171 } |
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172 _type2aelembytes[T_OBJECT] = heapOopSize; |
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173 _type2aelembytes[T_ARRAY] = heapOopSize; |
| 0 | 174 } |
| 175 | |
| 176 | |
| 177 // Map BasicType to signature character | |
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178 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0}; |
| 0 | 179 |
| 180 // Map BasicType to Java type name | |
| 181 const char* type2name_tab[T_CONFLICT+1] = { | |
| 182 NULL, NULL, NULL, NULL, | |
| 183 "boolean", | |
| 184 "char", | |
| 185 "float", | |
| 186 "double", | |
| 187 "byte", | |
| 188 "short", | |
| 189 "int", | |
| 190 "long", | |
| 191 "object", | |
| 192 "array", | |
| 193 "void", | |
| 194 "*address*", | |
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195 "*narrowoop*", |
| 0 | 196 "*conflict*" |
| 197 }; | |
| 198 | |
| 199 | |
| 200 BasicType name2type(const char* name) { | |
| 201 for (int i = T_BOOLEAN; i <= T_VOID; i++) { | |
| 202 BasicType t = (BasicType)i; | |
| 203 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name)) | |
| 204 return t; | |
| 205 } | |
| 206 return T_ILLEGAL; | |
| 207 } | |
| 208 | |
| 209 | |
| 210 // Map BasicType to size in words | |
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211 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, -1}; |
| 0 | 212 |
| 213 BasicType type2field[T_CONFLICT+1] = { | |
| 214 (BasicType)0, // 0, | |
| 215 (BasicType)0, // 1, | |
| 216 (BasicType)0, // 2, | |
| 217 (BasicType)0, // 3, | |
| 218 T_BOOLEAN, // T_BOOLEAN = 4, | |
| 219 T_CHAR, // T_CHAR = 5, | |
| 220 T_FLOAT, // T_FLOAT = 6, | |
| 221 T_DOUBLE, // T_DOUBLE = 7, | |
| 222 T_BYTE, // T_BYTE = 8, | |
| 223 T_SHORT, // T_SHORT = 9, | |
| 224 T_INT, // T_INT = 10, | |
| 225 T_LONG, // T_LONG = 11, | |
| 226 T_OBJECT, // T_OBJECT = 12, | |
| 227 T_OBJECT, // T_ARRAY = 13, | |
| 228 T_VOID, // T_VOID = 14, | |
| 229 T_ADDRESS, // T_ADDRESS = 15, | |
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230 T_NARROWOOP, // T_NARROWOOP= 16, |
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231 T_CONFLICT // T_CONFLICT = 17, |
| 0 | 232 }; |
| 233 | |
| 234 | |
| 235 BasicType type2wfield[T_CONFLICT+1] = { | |
| 236 (BasicType)0, // 0, | |
| 237 (BasicType)0, // 1, | |
| 238 (BasicType)0, // 2, | |
| 239 (BasicType)0, // 3, | |
| 240 T_INT, // T_BOOLEAN = 4, | |
| 241 T_INT, // T_CHAR = 5, | |
| 242 T_FLOAT, // T_FLOAT = 6, | |
| 243 T_DOUBLE, // T_DOUBLE = 7, | |
| 244 T_INT, // T_BYTE = 8, | |
| 245 T_INT, // T_SHORT = 9, | |
| 246 T_INT, // T_INT = 10, | |
| 247 T_LONG, // T_LONG = 11, | |
| 248 T_OBJECT, // T_OBJECT = 12, | |
| 249 T_OBJECT, // T_ARRAY = 13, | |
| 250 T_VOID, // T_VOID = 14, | |
| 251 T_ADDRESS, // T_ADDRESS = 15, | |
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252 T_NARROWOOP, // T_NARROWOOP = 16, |
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253 T_CONFLICT // T_CONFLICT = 17, |
| 0 | 254 }; |
| 255 | |
| 256 | |
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257 int _type2aelembytes[T_CONFLICT+1] = { |
| 0 | 258 0, // 0 |
| 259 0, // 1 | |
| 260 0, // 2 | |
| 261 0, // 3 | |
| 262 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4, | |
| 263 T_CHAR_aelem_bytes, // T_CHAR = 5, | |
| 264 T_FLOAT_aelem_bytes, // T_FLOAT = 6, | |
| 265 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7, | |
| 266 T_BYTE_aelem_bytes, // T_BYTE = 8, | |
| 267 T_SHORT_aelem_bytes, // T_SHORT = 9, | |
| 268 T_INT_aelem_bytes, // T_INT = 10, | |
| 269 T_LONG_aelem_bytes, // T_LONG = 11, | |
| 270 T_OBJECT_aelem_bytes, // T_OBJECT = 12, | |
| 271 T_ARRAY_aelem_bytes, // T_ARRAY = 13, | |
| 272 0, // T_VOID = 14, | |
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273 T_OBJECT_aelem_bytes, // T_ADDRESS = 15, |
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274 T_NARROWOOP_aelem_bytes,// T_NARROWOOP= 16, |
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275 0 // T_CONFLICT = 17, |
| 0 | 276 }; |
| 277 | |
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278 #ifdef ASSERT |
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279 int type2aelembytes(BasicType t, bool allow_address) { |
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280 assert(allow_address || t != T_ADDRESS, " "); |
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281 return _type2aelembytes[t]; |
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282 } |
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6633953: type2aelembytes{T_ADDRESS} should be 8 bytes in 64 bit VM
kvn
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0
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changeset
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283 #endif |
| 0 | 284 |
| 285 // Support for 64-bit integer arithmetic | |
| 286 | |
| 287 // The following code is mostly taken from JVM typedefs_md.h and system_md.c | |
| 288 | |
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113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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29
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changeset
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289 static const jlong high_bit = (jlong)1 << (jlong)63; |
| 0 | 290 static const jlong other_bits = ~high_bit; |
| 291 | |
| 292 jlong float2long(jfloat f) { | |
| 293 jlong tmp = (jlong) f; | |
| 294 if (tmp != high_bit) { | |
| 295 return tmp; | |
| 296 } else { | |
| 297 if (g_isnan((jdouble)f)) { | |
| 298 return 0; | |
| 299 } | |
| 300 if (f < 0) { | |
| 301 return high_bit; | |
| 302 } else { | |
| 303 return other_bits; | |
| 304 } | |
| 305 } | |
| 306 } | |
| 307 | |
| 308 | |
| 309 jlong double2long(jdouble f) { | |
| 310 jlong tmp = (jlong) f; | |
| 311 if (tmp != high_bit) { | |
| 312 return tmp; | |
| 313 } else { | |
| 314 if (g_isnan(f)) { | |
| 315 return 0; | |
| 316 } | |
| 317 if (f < 0) { | |
| 318 return high_bit; | |
| 319 } else { | |
| 320 return other_bits; | |
| 321 } | |
| 322 } | |
| 323 } | |
| 324 | |
| 325 // least common multiple | |
| 326 size_t lcm(size_t a, size_t b) { | |
| 327 size_t cur, div, next; | |
| 328 | |
| 329 cur = MAX2(a, b); | |
| 330 div = MIN2(a, b); | |
| 331 | |
| 332 assert(div != 0, "lcm requires positive arguments"); | |
| 333 | |
| 334 | |
| 335 while ((next = cur % div) != 0) { | |
| 336 cur = div; div = next; | |
| 337 } | |
| 338 | |
| 339 | |
| 340 julong result = julong(a) * b / div; | |
| 341 assert(result <= (size_t)max_uintx, "Integer overflow in lcm"); | |
| 342 | |
| 343 return size_t(result); | |
| 344 } |