Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions.cpp @ 3763:e66f38dd58a9
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author | ysr |
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date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | f95d63e2154a |
children | da91efe96a93 |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, 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 * | |
1552
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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 | |
113
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115 case T_NARROWOOP: // compressed pointer |
0 | 116 case T_CONFLICT: // might as well support a bottom type |
117 case T_VOID: // padding or other unaddressed word | |
118 // layout type must map to itself | |
119 assert(vt == ft, ""); | |
120 break; | |
121 default: | |
122 // non-layout type must map to a (different) layout type | |
123 assert(vt != ft, ""); | |
124 assert(ft == type2field[ft], ""); | |
125 } | |
126 // every type must map to same-sized layout type: | |
127 assert(type2size[vt] == type2size[ft], ""); | |
128 } | |
129 } | |
130 // These are assumed, e.g., when filling HeapWords with juints. | |
131 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2"); | |
132 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2"); | |
133 assert((size_t)HeapWordSize >= sizeof(juint), | |
134 "HeapWord should be at least as large as juint"); | |
135 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer"); | |
136 #endif | |
137 | |
138 if( JavaPriority1_To_OSPriority != -1 ) | |
139 os::java_to_os_priority[1] = JavaPriority1_To_OSPriority; | |
140 if( JavaPriority2_To_OSPriority != -1 ) | |
141 os::java_to_os_priority[2] = JavaPriority2_To_OSPriority; | |
142 if( JavaPriority3_To_OSPriority != -1 ) | |
143 os::java_to_os_priority[3] = JavaPriority3_To_OSPriority; | |
144 if( JavaPriority4_To_OSPriority != -1 ) | |
145 os::java_to_os_priority[4] = JavaPriority4_To_OSPriority; | |
146 if( JavaPriority5_To_OSPriority != -1 ) | |
147 os::java_to_os_priority[5] = JavaPriority5_To_OSPriority; | |
148 if( JavaPriority6_To_OSPriority != -1 ) | |
149 os::java_to_os_priority[6] = JavaPriority6_To_OSPriority; | |
150 if( JavaPriority7_To_OSPriority != -1 ) | |
151 os::java_to_os_priority[7] = JavaPriority7_To_OSPriority; | |
152 if( JavaPriority8_To_OSPriority != -1 ) | |
153 os::java_to_os_priority[8] = JavaPriority8_To_OSPriority; | |
154 if( JavaPriority9_To_OSPriority != -1 ) | |
155 os::java_to_os_priority[9] = JavaPriority9_To_OSPriority; | |
156 if(JavaPriority10_To_OSPriority != -1 ) | |
157 os::java_to_os_priority[10] = JavaPriority10_To_OSPriority; | |
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158 |
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159 // Set the size of basic types here (after argument parsing but before |
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160 // stub generation). |
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161 if (UseCompressedOops) { |
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162 // Size info for oops within java objects is fixed |
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163 heapOopSize = jintSize; |
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164 LogBytesPerHeapOop = LogBytesPerInt; |
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165 LogBitsPerHeapOop = LogBitsPerInt; |
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166 BytesPerHeapOop = BytesPerInt; |
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167 BitsPerHeapOop = BitsPerInt; |
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168 } else { |
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169 heapOopSize = oopSize; |
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170 LogBytesPerHeapOop = LogBytesPerWord; |
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171 LogBitsPerHeapOop = LogBitsPerWord; |
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172 BytesPerHeapOop = BytesPerWord; |
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173 BitsPerHeapOop = BitsPerWord; |
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174 } |
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175 _type2aelembytes[T_OBJECT] = heapOopSize; |
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176 _type2aelembytes[T_ARRAY] = heapOopSize; |
0 | 177 } |
178 | |
179 | |
180 // Map BasicType to signature character | |
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181 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0}; |
0 | 182 |
183 // Map BasicType to Java type name | |
184 const char* type2name_tab[T_CONFLICT+1] = { | |
185 NULL, NULL, NULL, NULL, | |
186 "boolean", | |
187 "char", | |
188 "float", | |
189 "double", | |
190 "byte", | |
191 "short", | |
192 "int", | |
193 "long", | |
194 "object", | |
195 "array", | |
196 "void", | |
197 "*address*", | |
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198 "*narrowoop*", |
0 | 199 "*conflict*" |
200 }; | |
201 | |
202 | |
203 BasicType name2type(const char* name) { | |
204 for (int i = T_BOOLEAN; i <= T_VOID; i++) { | |
205 BasicType t = (BasicType)i; | |
206 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name)) | |
207 return t; | |
208 } | |
209 return T_ILLEGAL; | |
210 } | |
211 | |
212 | |
213 // Map BasicType to size in words | |
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214 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, -1}; |
0 | 215 |
216 BasicType type2field[T_CONFLICT+1] = { | |
217 (BasicType)0, // 0, | |
218 (BasicType)0, // 1, | |
219 (BasicType)0, // 2, | |
220 (BasicType)0, // 3, | |
221 T_BOOLEAN, // T_BOOLEAN = 4, | |
222 T_CHAR, // T_CHAR = 5, | |
223 T_FLOAT, // T_FLOAT = 6, | |
224 T_DOUBLE, // T_DOUBLE = 7, | |
225 T_BYTE, // T_BYTE = 8, | |
226 T_SHORT, // T_SHORT = 9, | |
227 T_INT, // T_INT = 10, | |
228 T_LONG, // T_LONG = 11, | |
229 T_OBJECT, // T_OBJECT = 12, | |
230 T_OBJECT, // T_ARRAY = 13, | |
231 T_VOID, // T_VOID = 14, | |
232 T_ADDRESS, // T_ADDRESS = 15, | |
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233 T_NARROWOOP, // T_NARROWOOP= 16, |
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234 T_CONFLICT // T_CONFLICT = 17, |
0 | 235 }; |
236 | |
237 | |
238 BasicType type2wfield[T_CONFLICT+1] = { | |
239 (BasicType)0, // 0, | |
240 (BasicType)0, // 1, | |
241 (BasicType)0, // 2, | |
242 (BasicType)0, // 3, | |
243 T_INT, // T_BOOLEAN = 4, | |
244 T_INT, // T_CHAR = 5, | |
245 T_FLOAT, // T_FLOAT = 6, | |
246 T_DOUBLE, // T_DOUBLE = 7, | |
247 T_INT, // T_BYTE = 8, | |
248 T_INT, // T_SHORT = 9, | |
249 T_INT, // T_INT = 10, | |
250 T_LONG, // T_LONG = 11, | |
251 T_OBJECT, // T_OBJECT = 12, | |
252 T_OBJECT, // T_ARRAY = 13, | |
253 T_VOID, // T_VOID = 14, | |
254 T_ADDRESS, // T_ADDRESS = 15, | |
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255 T_NARROWOOP, // T_NARROWOOP = 16, |
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256 T_CONFLICT // T_CONFLICT = 17, |
0 | 257 }; |
258 | |
259 | |
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260 int _type2aelembytes[T_CONFLICT+1] = { |
0 | 261 0, // 0 |
262 0, // 1 | |
263 0, // 2 | |
264 0, // 3 | |
265 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4, | |
266 T_CHAR_aelem_bytes, // T_CHAR = 5, | |
267 T_FLOAT_aelem_bytes, // T_FLOAT = 6, | |
268 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7, | |
269 T_BYTE_aelem_bytes, // T_BYTE = 8, | |
270 T_SHORT_aelem_bytes, // T_SHORT = 9, | |
271 T_INT_aelem_bytes, // T_INT = 10, | |
272 T_LONG_aelem_bytes, // T_LONG = 11, | |
273 T_OBJECT_aelem_bytes, // T_OBJECT = 12, | |
274 T_ARRAY_aelem_bytes, // T_ARRAY = 13, | |
275 0, // T_VOID = 14, | |
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276 T_OBJECT_aelem_bytes, // T_ADDRESS = 15, |
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277 T_NARROWOOP_aelem_bytes,// T_NARROWOOP= 16, |
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278 0 // T_CONFLICT = 17, |
0 | 279 }; |
280 | |
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281 #ifdef ASSERT |
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282 int type2aelembytes(BasicType t, bool allow_address) { |
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283 assert(allow_address || t != T_ADDRESS, " "); |
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284 return _type2aelembytes[t]; |
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285 } |
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286 #endif |
0 | 287 |
288 // Support for 64-bit integer arithmetic | |
289 | |
290 // The following code is mostly taken from JVM typedefs_md.h and system_md.c | |
291 | |
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292 static const jlong high_bit = (jlong)1 << (jlong)63; |
0 | 293 static const jlong other_bits = ~high_bit; |
294 | |
295 jlong float2long(jfloat f) { | |
296 jlong tmp = (jlong) f; | |
297 if (tmp != high_bit) { | |
298 return tmp; | |
299 } else { | |
300 if (g_isnan((jdouble)f)) { | |
301 return 0; | |
302 } | |
303 if (f < 0) { | |
304 return high_bit; | |
305 } else { | |
306 return other_bits; | |
307 } | |
308 } | |
309 } | |
310 | |
311 | |
312 jlong double2long(jdouble f) { | |
313 jlong tmp = (jlong) f; | |
314 if (tmp != high_bit) { | |
315 return tmp; | |
316 } else { | |
317 if (g_isnan(f)) { | |
318 return 0; | |
319 } | |
320 if (f < 0) { | |
321 return high_bit; | |
322 } else { | |
323 return other_bits; | |
324 } | |
325 } | |
326 } | |
327 | |
328 // least common multiple | |
329 size_t lcm(size_t a, size_t b) { | |
330 size_t cur, div, next; | |
331 | |
332 cur = MAX2(a, b); | |
333 div = MIN2(a, b); | |
334 | |
335 assert(div != 0, "lcm requires positive arguments"); | |
336 | |
337 | |
338 while ((next = cur % div) != 0) { | |
339 cur = div; div = next; | |
340 } | |
341 | |
342 | |
343 julong result = julong(a) * b / div; | |
344 assert(result <= (size_t)max_uintx, "Integer overflow in lcm"); | |
345 | |
346 return size_t(result); | |
347 } |