Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | f95d63e2154a |
| children | 8a02ca5e5576 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 "runtime/os.hpp" | |
| 27 #include "utilities/globalDefinitions.hpp" | |
| 28 #include "utilities/top.hpp" | |
| 29 | |
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30 // Basic error support |
| 0 | 31 |
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32 // Info for oops within a java object. Defaults are zero so |
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33 // things will break badly if incorrectly initialized. |
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34 int heapOopSize = 0; |
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35 int LogBytesPerHeapOop = 0; |
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36 int LogBitsPerHeapOop = 0; |
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37 int BytesPerHeapOop = 0; |
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38 int BitsPerHeapOop = 0; |
| 0 | 39 |
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40 // Object alignment, in units of HeapWords. |
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41 // Defaults are -1 so things will break badly if incorrectly initialized. |
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42 int MinObjAlignment = -1; |
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43 int MinObjAlignmentInBytes = -1; |
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44 int MinObjAlignmentInBytesMask = 0; |
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45 |
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46 int LogMinObjAlignment = -1; |
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47 int LogMinObjAlignmentInBytes = -1; |
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48 |
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49 // Oop encoding heap max |
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50 uint64_t OopEncodingHeapMax = 0; |
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51 |
| 0 | 52 void basic_fatal(const char* msg) { |
| 53 fatal(msg); | |
| 54 } | |
| 55 | |
| 56 // Something to help porters sleep at night | |
| 57 | |
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58 void basic_types_init() { |
| 0 | 59 #ifdef ASSERT |
| 60 #ifdef _LP64 | |
| 61 assert(min_intx == (intx)CONST64(0x8000000000000000), "correct constant"); | |
| 62 assert(max_intx == CONST64(0x7FFFFFFFFFFFFFFF), "correct constant"); | |
| 63 assert(max_uintx == CONST64(0xFFFFFFFFFFFFFFFF), "correct constant"); | |
| 64 assert( 8 == sizeof( intx), "wrong size for basic type"); | |
| 65 assert( 8 == sizeof( jobject), "wrong size for basic type"); | |
| 66 #else | |
| 67 assert(min_intx == (intx)0x80000000, "correct constant"); | |
| 68 assert(max_intx == 0x7FFFFFFF, "correct constant"); | |
| 69 assert(max_uintx == 0xFFFFFFFF, "correct constant"); | |
| 70 assert( 4 == sizeof( intx), "wrong size for basic type"); | |
| 71 assert( 4 == sizeof( jobject), "wrong size for basic type"); | |
| 72 #endif | |
| 73 assert( (~max_juint) == 0, "max_juint has all its bits"); | |
| 74 assert( (~max_uintx) == 0, "max_uintx has all its bits"); | |
| 75 assert( (~max_julong) == 0, "max_julong has all its bits"); | |
| 76 assert( 1 == sizeof( jbyte), "wrong size for basic type"); | |
| 77 assert( 2 == sizeof( jchar), "wrong size for basic type"); | |
| 78 assert( 2 == sizeof( jshort), "wrong size for basic type"); | |
| 79 assert( 4 == sizeof( juint), "wrong size for basic type"); | |
| 80 assert( 4 == sizeof( jint), "wrong size for basic type"); | |
| 81 assert( 1 == sizeof( jboolean), "wrong size for basic type"); | |
| 82 assert( 8 == sizeof( jlong), "wrong size for basic type"); | |
| 83 assert( 4 == sizeof( jfloat), "wrong size for basic type"); | |
| 84 assert( 8 == sizeof( jdouble), "wrong size for basic type"); | |
| 85 assert( 1 == sizeof( u1), "wrong size for basic type"); | |
| 86 assert( 2 == sizeof( u2), "wrong size for basic type"); | |
| 87 assert( 4 == sizeof( u4), "wrong size for basic type"); | |
| 88 | |
| 89 int num_type_chars = 0; | |
| 90 for (int i = 0; i < 99; i++) { | |
| 91 if (type2char((BasicType)i) != 0) { | |
| 92 assert(char2type(type2char((BasicType)i)) == i, "proper inverses"); | |
| 93 num_type_chars++; | |
| 94 } | |
| 95 } | |
| 96 assert(num_type_chars == 11, "must have tested the right number of mappings"); | |
| 97 assert(char2type(0) == T_ILLEGAL, "correct illegality"); | |
| 98 | |
| 99 { | |
| 100 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
| 101 BasicType vt = (BasicType)i; | |
| 102 BasicType ft = type2field[vt]; | |
| 103 switch (vt) { | |
| 104 // the following types might plausibly show up in memory layouts: | |
| 105 case T_BOOLEAN: | |
| 106 case T_BYTE: | |
| 107 case T_CHAR: | |
| 108 case T_SHORT: | |
| 109 case T_INT: | |
| 110 case T_FLOAT: | |
| 111 case T_DOUBLE: | |
| 112 case T_LONG: | |
| 113 case T_OBJECT: | |
| 114 case T_ADDRESS: // random raw pointer | |
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115 case T_METADATA: // metadata pointer |
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116 case T_NARROWOOP: // compressed pointer |
| 0 | 117 case T_CONFLICT: // might as well support a bottom type |
| 118 case T_VOID: // padding or other unaddressed word | |
| 119 // layout type must map to itself | |
| 120 assert(vt == ft, ""); | |
| 121 break; | |
| 122 default: | |
| 123 // non-layout type must map to a (different) layout type | |
| 124 assert(vt != ft, ""); | |
| 125 assert(ft == type2field[ft], ""); | |
| 126 } | |
| 127 // every type must map to same-sized layout type: | |
| 128 assert(type2size[vt] == type2size[ft], ""); | |
| 129 } | |
| 130 } | |
| 131 // These are assumed, e.g., when filling HeapWords with juints. | |
| 132 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2"); | |
| 133 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2"); | |
| 134 assert((size_t)HeapWordSize >= sizeof(juint), | |
| 135 "HeapWord should be at least as large as juint"); | |
| 136 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer"); | |
| 137 #endif | |
| 138 | |
| 139 if( JavaPriority1_To_OSPriority != -1 ) | |
| 140 os::java_to_os_priority[1] = JavaPriority1_To_OSPriority; | |
| 141 if( JavaPriority2_To_OSPriority != -1 ) | |
| 142 os::java_to_os_priority[2] = JavaPriority2_To_OSPriority; | |
| 143 if( JavaPriority3_To_OSPriority != -1 ) | |
| 144 os::java_to_os_priority[3] = JavaPriority3_To_OSPriority; | |
| 145 if( JavaPriority4_To_OSPriority != -1 ) | |
| 146 os::java_to_os_priority[4] = JavaPriority4_To_OSPriority; | |
| 147 if( JavaPriority5_To_OSPriority != -1 ) | |
| 148 os::java_to_os_priority[5] = JavaPriority5_To_OSPriority; | |
| 149 if( JavaPriority6_To_OSPriority != -1 ) | |
| 150 os::java_to_os_priority[6] = JavaPriority6_To_OSPriority; | |
| 151 if( JavaPriority7_To_OSPriority != -1 ) | |
| 152 os::java_to_os_priority[7] = JavaPriority7_To_OSPriority; | |
| 153 if( JavaPriority8_To_OSPriority != -1 ) | |
| 154 os::java_to_os_priority[8] = JavaPriority8_To_OSPriority; | |
| 155 if( JavaPriority9_To_OSPriority != -1 ) | |
| 156 os::java_to_os_priority[9] = JavaPriority9_To_OSPriority; | |
| 157 if(JavaPriority10_To_OSPriority != -1 ) | |
| 158 os::java_to_os_priority[10] = JavaPriority10_To_OSPriority; | |
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159 |
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160 // Set the size of basic types here (after argument parsing but before |
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161 // stub generation). |
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162 if (UseCompressedOops) { |
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163 // Size info for oops within java objects is fixed |
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164 heapOopSize = jintSize; |
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165 LogBytesPerHeapOop = LogBytesPerInt; |
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166 LogBitsPerHeapOop = LogBitsPerInt; |
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167 BytesPerHeapOop = BytesPerInt; |
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168 BitsPerHeapOop = BitsPerInt; |
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169 } else { |
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170 heapOopSize = oopSize; |
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171 LogBytesPerHeapOop = LogBytesPerWord; |
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172 LogBitsPerHeapOop = LogBitsPerWord; |
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173 BytesPerHeapOop = BytesPerWord; |
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174 BitsPerHeapOop = BitsPerWord; |
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175 } |
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176 _type2aelembytes[T_OBJECT] = heapOopSize; |
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177 _type2aelembytes[T_ARRAY] = heapOopSize; |
| 0 | 178 } |
| 179 | |
| 180 | |
| 181 // Map BasicType to signature character | |
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182 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0, 0}; |
| 0 | 183 |
| 184 // Map BasicType to Java type name | |
| 185 const char* type2name_tab[T_CONFLICT+1] = { | |
| 186 NULL, NULL, NULL, NULL, | |
| 187 "boolean", | |
| 188 "char", | |
| 189 "float", | |
| 190 "double", | |
| 191 "byte", | |
| 192 "short", | |
| 193 "int", | |
| 194 "long", | |
| 195 "object", | |
| 196 "array", | |
| 197 "void", | |
| 198 "*address*", | |
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199 "*narrowoop*", |
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200 "*metadata*", |
| 0 | 201 "*conflict*" |
| 202 }; | |
| 203 | |
| 204 | |
| 205 BasicType name2type(const char* name) { | |
| 206 for (int i = T_BOOLEAN; i <= T_VOID; i++) { | |
| 207 BasicType t = (BasicType)i; | |
| 208 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name)) | |
| 209 return t; | |
| 210 } | |
| 211 return T_ILLEGAL; | |
| 212 } | |
| 213 | |
| 214 | |
| 215 // Map BasicType to size in words | |
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216 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, -1}; |
| 0 | 217 |
| 218 BasicType type2field[T_CONFLICT+1] = { | |
| 219 (BasicType)0, // 0, | |
| 220 (BasicType)0, // 1, | |
| 221 (BasicType)0, // 2, | |
| 222 (BasicType)0, // 3, | |
| 223 T_BOOLEAN, // T_BOOLEAN = 4, | |
| 224 T_CHAR, // T_CHAR = 5, | |
| 225 T_FLOAT, // T_FLOAT = 6, | |
| 226 T_DOUBLE, // T_DOUBLE = 7, | |
| 227 T_BYTE, // T_BYTE = 8, | |
| 228 T_SHORT, // T_SHORT = 9, | |
| 229 T_INT, // T_INT = 10, | |
| 230 T_LONG, // T_LONG = 11, | |
| 231 T_OBJECT, // T_OBJECT = 12, | |
| 232 T_OBJECT, // T_ARRAY = 13, | |
| 233 T_VOID, // T_VOID = 14, | |
| 234 T_ADDRESS, // T_ADDRESS = 15, | |
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235 T_NARROWOOP, // T_NARROWOOP= 16, |
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236 T_METADATA, // T_METADATA = 17, |
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237 T_CONFLICT // T_CONFLICT = 18, |
| 0 | 238 }; |
| 239 | |
| 240 | |
| 241 BasicType type2wfield[T_CONFLICT+1] = { | |
| 242 (BasicType)0, // 0, | |
| 243 (BasicType)0, // 1, | |
| 244 (BasicType)0, // 2, | |
| 245 (BasicType)0, // 3, | |
| 246 T_INT, // T_BOOLEAN = 4, | |
| 247 T_INT, // T_CHAR = 5, | |
| 248 T_FLOAT, // T_FLOAT = 6, | |
| 249 T_DOUBLE, // T_DOUBLE = 7, | |
| 250 T_INT, // T_BYTE = 8, | |
| 251 T_INT, // T_SHORT = 9, | |
| 252 T_INT, // T_INT = 10, | |
| 253 T_LONG, // T_LONG = 11, | |
| 254 T_OBJECT, // T_OBJECT = 12, | |
| 255 T_OBJECT, // T_ARRAY = 13, | |
| 256 T_VOID, // T_VOID = 14, | |
| 257 T_ADDRESS, // T_ADDRESS = 15, | |
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258 T_NARROWOOP, // T_NARROWOOP = 16, |
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259 T_METADATA, // T_METADATA = 17, |
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260 T_CONFLICT // T_CONFLICT = 18, |
| 0 | 261 }; |
| 262 | |
| 263 | |
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264 int _type2aelembytes[T_CONFLICT+1] = { |
| 0 | 265 0, // 0 |
| 266 0, // 1 | |
| 267 0, // 2 | |
| 268 0, // 3 | |
| 269 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4, | |
| 270 T_CHAR_aelem_bytes, // T_CHAR = 5, | |
| 271 T_FLOAT_aelem_bytes, // T_FLOAT = 6, | |
| 272 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7, | |
| 273 T_BYTE_aelem_bytes, // T_BYTE = 8, | |
| 274 T_SHORT_aelem_bytes, // T_SHORT = 9, | |
| 275 T_INT_aelem_bytes, // T_INT = 10, | |
| 276 T_LONG_aelem_bytes, // T_LONG = 11, | |
| 277 T_OBJECT_aelem_bytes, // T_OBJECT = 12, | |
| 278 T_ARRAY_aelem_bytes, // T_ARRAY = 13, | |
| 279 0, // T_VOID = 14, | |
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280 T_OBJECT_aelem_bytes, // T_ADDRESS = 15, |
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281 T_NARROWOOP_aelem_bytes,// T_NARROWOOP= 16, |
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282 T_OBJECT_aelem_bytes, // T_METADATA = 17, |
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283 0 // T_CONFLICT = 18, |
| 0 | 284 }; |
| 285 | |
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286 #ifdef ASSERT |
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287 int type2aelembytes(BasicType t, bool allow_address) { |
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288 assert(allow_address || t != T_ADDRESS, " "); |
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289 return _type2aelembytes[t]; |
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290 } |
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291 #endif |
| 0 | 292 |
| 293 // Support for 64-bit integer arithmetic | |
| 294 | |
| 295 // The following code is mostly taken from JVM typedefs_md.h and system_md.c | |
| 296 | |
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297 static const jlong high_bit = (jlong)1 << (jlong)63; |
| 0 | 298 static const jlong other_bits = ~high_bit; |
| 299 | |
| 300 jlong float2long(jfloat f) { | |
| 301 jlong tmp = (jlong) f; | |
| 302 if (tmp != high_bit) { | |
| 303 return tmp; | |
| 304 } else { | |
| 305 if (g_isnan((jdouble)f)) { | |
| 306 return 0; | |
| 307 } | |
| 308 if (f < 0) { | |
| 309 return high_bit; | |
| 310 } else { | |
| 311 return other_bits; | |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 | |
| 317 jlong double2long(jdouble f) { | |
| 318 jlong tmp = (jlong) f; | |
| 319 if (tmp != high_bit) { | |
| 320 return tmp; | |
| 321 } else { | |
| 322 if (g_isnan(f)) { | |
| 323 return 0; | |
| 324 } | |
| 325 if (f < 0) { | |
| 326 return high_bit; | |
| 327 } else { | |
| 328 return other_bits; | |
| 329 } | |
| 330 } | |
| 331 } | |
| 332 | |
| 333 // least common multiple | |
| 334 size_t lcm(size_t a, size_t b) { | |
| 335 size_t cur, div, next; | |
| 336 | |
| 337 cur = MAX2(a, b); | |
| 338 div = MIN2(a, b); | |
| 339 | |
| 340 assert(div != 0, "lcm requires positive arguments"); | |
| 341 | |
| 342 | |
| 343 while ((next = cur % div) != 0) { | |
| 344 cur = div; div = next; | |
| 345 } | |
| 346 | |
| 347 | |
| 348 julong result = julong(a) * b / div; | |
| 349 assert(result <= (size_t)max_uintx, "Integer overflow in lcm"); | |
| 350 | |
| 351 return size_t(result); | |
| 352 } |