Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions.hpp @ 14412:e2722a66aba7
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author | kvn |
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date | Thu, 05 Sep 2013 11:04:39 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 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 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP |
26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP | |
27 | |
4006 | 28 #ifndef __STDC_FORMAT_MACROS |
3960 | 29 #define __STDC_FORMAT_MACROS |
4006 | 30 #endif |
3960 | 31 |
1972 | 32 #ifdef TARGET_COMPILER_gcc |
33 # include "utilities/globalDefinitions_gcc.hpp" | |
34 #endif | |
35 #ifdef TARGET_COMPILER_visCPP | |
36 # include "utilities/globalDefinitions_visCPP.hpp" | |
37 #endif | |
38 #ifdef TARGET_COMPILER_sparcWorks | |
39 # include "utilities/globalDefinitions_sparcWorks.hpp" | |
40 #endif | |
14411 | 41 #ifdef TARGET_COMPILER_xlc |
42 # include "utilities/globalDefinitions_xlc.hpp" | |
43 #endif | |
1972 | 44 |
45 #include "utilities/macros.hpp" | |
46 | |
0 | 47 // This file holds all globally used constants & types, class (forward) |
48 // declarations and a few frequently used utility functions. | |
49 | |
50 //---------------------------------------------------------------------------------------------------- | |
51 // Constants | |
52 | |
53 const int LogBytesPerShort = 1; | |
54 const int LogBytesPerInt = 2; | |
55 #ifdef _LP64 | |
56 const int LogBytesPerWord = 3; | |
57 #else | |
58 const int LogBytesPerWord = 2; | |
59 #endif | |
60 const int LogBytesPerLong = 3; | |
61 | |
62 const int BytesPerShort = 1 << LogBytesPerShort; | |
63 const int BytesPerInt = 1 << LogBytesPerInt; | |
64 const int BytesPerWord = 1 << LogBytesPerWord; | |
65 const int BytesPerLong = 1 << LogBytesPerLong; | |
66 | |
67 const int LogBitsPerByte = 3; | |
68 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; | |
69 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; | |
70 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; | |
71 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; | |
72 | |
73 const int BitsPerByte = 1 << LogBitsPerByte; | |
74 const int BitsPerShort = 1 << LogBitsPerShort; | |
75 const int BitsPerInt = 1 << LogBitsPerInt; | |
76 const int BitsPerWord = 1 << LogBitsPerWord; | |
77 const int BitsPerLong = 1 << LogBitsPerLong; | |
78 | |
79 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1; | |
80 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1; | |
81 | |
82 const int WordsPerLong = 2; // Number of stack entries for longs | |
83 | |
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84 const int oopSize = sizeof(char*); // Full-width oop |
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85 extern int heapOopSize; // Oop within a java object |
0 | 86 const int wordSize = sizeof(char*); |
87 const int longSize = sizeof(jlong); | |
88 const int jintSize = sizeof(jint); | |
89 const int size_tSize = sizeof(size_t); | |
90 | |
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91 const int BytesPerOop = BytesPerWord; // Full-width oop |
0 | 92 |
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93 extern int LogBytesPerHeapOop; // Oop within a java object |
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94 extern int LogBitsPerHeapOop; |
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95 extern int BytesPerHeapOop; |
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96 extern int BitsPerHeapOop; |
0 | 97 |
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98 // Oop encoding heap max |
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99 extern uint64_t OopEncodingHeapMax; |
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100 |
0 | 101 const int BitsPerJavaInteger = 32; |
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102 const int BitsPerJavaLong = 64; |
0 | 103 const int BitsPerSize_t = size_tSize * BitsPerByte; |
104 | |
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105 // Size of a char[] needed to represent a jint as a string in decimal. |
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106 const int jintAsStringSize = 12; |
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107 |
0 | 108 // In fact this should be |
109 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); | |
110 // see os::set_memory_serialize_page() | |
111 #ifdef _LP64 | |
112 const int SerializePageShiftCount = 4; | |
113 #else | |
114 const int SerializePageShiftCount = 3; | |
115 #endif | |
116 | |
117 // An opaque struct of heap-word width, so that HeapWord* can be a generic | |
118 // pointer into the heap. We require that object sizes be measured in | |
119 // units of heap words, so that that | |
120 // HeapWord* hw; | |
121 // hw += oop(hw)->foo(); | |
122 // works, where foo is a method (like size or scavenge) that returns the | |
123 // object size. | |
124 class HeapWord { | |
125 friend class VMStructs; | |
263
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126 private: |
0 | 127 char* i; |
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128 #ifndef PRODUCT |
263
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129 public: |
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130 char* value() { return i; } |
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131 #endif |
0 | 132 }; |
133 | |
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134 // Analogous opaque struct for metadata allocated from |
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135 // metaspaces. |
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136 class MetaWord { |
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137 friend class VMStructs; |
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138 private: |
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139 char* i; |
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140 }; |
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141 |
0 | 142 // HeapWordSize must be 2^LogHeapWordSize. |
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143 const int HeapWordSize = sizeof(HeapWord); |
0 | 144 #ifdef _LP64 |
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145 const int LogHeapWordSize = 3; |
0 | 146 #else |
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147 const int LogHeapWordSize = 2; |
0 | 148 #endif |
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149 const int HeapWordsPerLong = BytesPerLong / HeapWordSize; |
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150 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize; |
0 | 151 |
152 // The larger HeapWordSize for 64bit requires larger heaps | |
153 // for the same application running in 64bit. See bug 4967770. | |
154 // The minimum alignment to a heap word size is done. Other | |
155 // parts of the memory system may required additional alignment | |
156 // and are responsible for those alignments. | |
157 #ifdef _LP64 | |
158 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize) | |
159 #else | |
160 #define ScaleForWordSize(x) (x) | |
161 #endif | |
162 | |
163 // The minimum number of native machine words necessary to contain "byte_size" | |
164 // bytes. | |
165 inline size_t heap_word_size(size_t byte_size) { | |
166 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; | |
167 } | |
168 | |
169 | |
170 const size_t K = 1024; | |
171 const size_t M = K*K; | |
172 const size_t G = M*K; | |
173 const size_t HWperKB = K / sizeof(HeapWord); | |
174 | |
175 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint | |
176 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint | |
177 | |
178 // Constants for converting from a base unit to milli-base units. For | |
179 // example from seconds to milliseconds and microseconds | |
180 | |
181 const int MILLIUNITS = 1000; // milli units per base unit | |
182 const int MICROUNITS = 1000000; // micro units per base unit | |
183 const int NANOUNITS = 1000000000; // nano units per base unit | |
184 | |
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185 const jlong NANOSECS_PER_SEC = CONST64(1000000000); |
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186 const jint NANOSECS_PER_MILLISEC = 1000000; |
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187 |
0 | 188 inline const char* proper_unit_for_byte_size(size_t s) { |
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189 #ifdef _LP64 |
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190 if (s >= 10*G) { |
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191 return "G"; |
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192 } |
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193 #endif |
0 | 194 if (s >= 10*M) { |
195 return "M"; | |
196 } else if (s >= 10*K) { | |
197 return "K"; | |
198 } else { | |
199 return "B"; | |
200 } | |
201 } | |
202 | |
6059 | 203 template <class T> |
204 inline T byte_size_in_proper_unit(T s) { | |
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205 #ifdef _LP64 |
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206 if (s >= 10*G) { |
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207 return (T)(s/G); |
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208 } |
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209 #endif |
0 | 210 if (s >= 10*M) { |
6059 | 211 return (T)(s/M); |
0 | 212 } else if (s >= 10*K) { |
6059 | 213 return (T)(s/K); |
0 | 214 } else { |
215 return s; | |
216 } | |
217 } | |
218 | |
219 //---------------------------------------------------------------------------------------------------- | |
220 // VM type definitions | |
221 | |
222 // intx and uintx are the 'extended' int and 'extended' unsigned int types; | |
223 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform. | |
224 | |
225 typedef intptr_t intx; | |
226 typedef uintptr_t uintx; | |
227 | |
228 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); | |
229 const intx max_intx = (uintx)min_intx - 1; | |
230 const uintx max_uintx = (uintx)-1; | |
231 | |
232 // Table of values: | |
233 // sizeof intx 4 8 | |
234 // min_intx 0x80000000 0x8000000000000000 | |
235 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF | |
236 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF | |
237 | |
238 typedef unsigned int uint; NEEDS_CLEANUP | |
239 | |
240 | |
241 //---------------------------------------------------------------------------------------------------- | |
242 // Java type definitions | |
243 | |
244 // All kinds of 'plain' byte addresses | |
245 typedef signed char s_char; | |
246 typedef unsigned char u_char; | |
247 typedef u_char* address; | |
248 typedef uintptr_t address_word; // unsigned integer which will hold a pointer | |
249 // except for some implementations of a C++ | |
250 // linkage pointer to function. Should never | |
251 // need one of those to be placed in this | |
252 // type anyway. | |
253 | |
254 // Utility functions to "portably" (?) bit twiddle pointers | |
255 // Where portable means keep ANSI C++ compilers quiet | |
256 | |
257 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } | |
258 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); } | |
259 | |
260 // Utility functions to "portably" make cast to/from function pointers. | |
261 | |
262 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } | |
263 inline address_word castable_address(address x) { return address_word(x) ; } | |
264 inline address_word castable_address(void* x) { return address_word(x) ; } | |
265 | |
266 // Pointer subtraction. | |
267 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have | |
268 // the range we might need to find differences from one end of the heap | |
269 // to the other. | |
270 // A typical use might be: | |
271 // if (pointer_delta(end(), top()) >= size) { | |
272 // // enough room for an object of size | |
273 // ... | |
274 // and then additions like | |
275 // ... top() + size ... | |
276 // are safe because we know that top() is at least size below end(). | |
277 inline size_t pointer_delta(const void* left, | |
278 const void* right, | |
279 size_t element_size) { | |
280 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size; | |
281 } | |
282 // A version specialized for HeapWord*'s. | |
283 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) { | |
284 return pointer_delta(left, right, sizeof(HeapWord)); | |
285 } | |
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286 // A version specialized for MetaWord*'s. |
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287 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) { |
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288 return pointer_delta(left, right, sizeof(MetaWord)); |
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289 } |
0 | 290 |
291 // | |
292 // ANSI C++ does not allow casting from one pointer type to a function pointer | |
293 // directly without at best a warning. This macro accomplishes it silently | |
294 // In every case that is present at this point the value be cast is a pointer | |
295 // to a C linkage function. In somecase the type used for the cast reflects | |
296 // that linkage and a picky compiler would not complain. In other cases because | |
297 // there is no convenient place to place a typedef with extern C linkage (i.e | |
298 // a platform dependent header file) it doesn't. At this point no compiler seems | |
299 // picky enough to catch these instances (which are few). It is possible that | |
300 // using templates could fix these for all cases. This use of templates is likely | |
301 // so far from the middle of the road that it is likely to be problematic in | |
302 // many C++ compilers. | |
303 // | |
304 #define CAST_TO_FN_PTR(func_type, value) ((func_type)(castable_address(value))) | |
305 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr))) | |
306 | |
307 // Unsigned byte types for os and stream.hpp | |
308 | |
309 // Unsigned one, two, four and eigth byte quantities used for describing | |
310 // the .class file format. See JVM book chapter 4. | |
311 | |
312 typedef jubyte u1; | |
313 typedef jushort u2; | |
314 typedef juint u4; | |
315 typedef julong u8; | |
316 | |
317 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte | |
318 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort | |
319 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint | |
320 const julong max_julong = (julong)-1; // 0xFF....FF largest julong | |
321 | |
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322 typedef jbyte s1; |
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323 typedef jshort s2; |
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324 typedef jint s4; |
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325 typedef jlong s8; |
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326 |
0 | 327 //---------------------------------------------------------------------------------------------------- |
328 // JVM spec restrictions | |
329 | |
330 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) | |
331 | |
332 | |
333 //---------------------------------------------------------------------------------------------------- | |
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334 // Default and minimum StringTableSize values |
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335 |
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336 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013); |
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337 const int minimumStringTableSize=1009; |
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338 |
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339 |
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340 //---------------------------------------------------------------------------------------------------- |
0 | 341 // HotSwap - for JVMTI aka Class File Replacement and PopFrame |
342 // | |
343 // Determines whether on-the-fly class replacement and frame popping are enabled. | |
344 | |
345 #define HOTSWAP | |
346 | |
347 //---------------------------------------------------------------------------------------------------- | |
348 // Object alignment, in units of HeapWords. | |
349 // | |
350 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and | |
351 // reference fields can be naturally aligned. | |
352 | |
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353 extern int MinObjAlignment; |
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354 extern int MinObjAlignmentInBytes; |
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355 extern int MinObjAlignmentInBytesMask; |
0 | 356 |
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357 extern int LogMinObjAlignment; |
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358 extern int LogMinObjAlignmentInBytes; |
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359 |
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360 const int LogKlassAlignmentInBytes = 3; |
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361 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize; |
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362 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes; |
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363 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize; |
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364 |
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365 // Klass encoding metaspace max size |
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366 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes; |
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367 |
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368 const jlong CompressedKlassPointersBase = NOT_LP64(0) LP64_ONLY(CONST64(0x800000000)); // 32*G |
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369 |
0 | 370 // Machine dependent stuff |
371 | |
1972 | 372 #ifdef TARGET_ARCH_x86 |
373 # include "globalDefinitions_x86.hpp" | |
374 #endif | |
375 #ifdef TARGET_ARCH_sparc | |
376 # include "globalDefinitions_sparc.hpp" | |
377 #endif | |
378 #ifdef TARGET_ARCH_zero | |
379 # include "globalDefinitions_zero.hpp" | |
380 #endif | |
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381 #ifdef TARGET_ARCH_arm |
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382 # include "globalDefinitions_arm.hpp" |
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383 #endif |
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384 #ifdef TARGET_ARCH_ppc |
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385 # include "globalDefinitions_ppc.hpp" |
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386 #endif |
1972 | 387 |
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388 /* |
11129 | 389 * If a platform does not support native stack walking |
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390 * the platform specific globalDefinitions (above) |
11129 | 391 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0 |
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392 */ |
11129 | 393 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED |
394 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1 | |
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395 #endif |
0 | 396 |
397 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348. | |
398 // Note: this value must be a power of 2 | |
399 | |
400 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) | |
401 | |
402 // Signed variants of alignment helpers. There are two versions of each, a macro | |
403 // for use in places like enum definitions that require compile-time constant | |
404 // expressions and a function for all other places so as to get type checking. | |
405 | |
406 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) | |
407 | |
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408 inline bool is_size_aligned(size_t size, size_t alignment) { |
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409 return align_size_up_(size, alignment) == size; |
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410 } |
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411 |
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412 inline bool is_ptr_aligned(void* ptr, size_t alignment) { |
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413 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr; |
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414 } |
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415 |
0 | 416 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) { |
417 return align_size_up_(size, alignment); | |
418 } | |
419 | |
420 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) | |
421 | |
422 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { | |
423 return align_size_down_(size, alignment); | |
424 } | |
425 | |
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426 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment))) |
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427 |
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428 inline void* align_ptr_up(void* ptr, size_t alignment) { |
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429 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment); |
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430 } |
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431 |
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432 inline void* align_ptr_down(void* ptr, size_t alignment) { |
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433 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); |
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434 } |
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435 |
0 | 436 // Align objects by rounding up their size, in HeapWord units. |
437 | |
438 #define align_object_size_(size) align_size_up_(size, MinObjAlignment) | |
439 | |
440 inline intptr_t align_object_size(intptr_t size) { | |
441 return align_size_up(size, MinObjAlignment); | |
442 } | |
443 | |
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444 inline bool is_object_aligned(intptr_t addr) { |
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445 return addr == align_object_size(addr); |
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446 } |
0 | 447 |
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448 // Pad out certain offsets to jlong alignment, in HeapWord units. |
0 | 449 |
450 inline intptr_t align_object_offset(intptr_t offset) { | |
451 return align_size_up(offset, HeapWordsPerLong); | |
452 } | |
453 | |
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454 inline void* align_pointer_up(const void* addr, size_t size) { |
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455 return (void*) align_size_up_((uintptr_t)addr, size); |
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456 } |
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457 |
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458 // Clamp an address to be within a specific page |
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459 // 1. If addr is on the page it is returned as is |
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460 // 2. If addr is above the page_address the start of the *next* page will be returned |
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461 // 3. Otherwise, if addr is below the page_address the start of the page will be returned |
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462 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) { |
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463 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) { |
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464 // address is in the specified page, just return it as is |
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465 return addr; |
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466 } else if (addr > page_address) { |
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467 // address is above specified page, return start of next page |
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468 return (address)align_size_down(intptr_t(page_address), page_size) + page_size; |
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469 } else { |
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470 // address is below specified page, return start of page |
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471 return (address)align_size_down(intptr_t(page_address), page_size); |
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472 } |
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473 } |
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474 |
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475 |
1665 | 476 // The expected size in bytes of a cache line, used to pad data structures. |
477 #define DEFAULT_CACHE_LINE_SIZE 64 | |
478 | |
0 | 479 |
480 //---------------------------------------------------------------------------------------------------- | |
481 // Utility macros for compilers | |
482 // used to silence compiler warnings | |
483 | |
484 #define Unused_Variable(var) var | |
485 | |
486 | |
487 //---------------------------------------------------------------------------------------------------- | |
488 // Miscellaneous | |
489 | |
490 // 6302670 Eliminate Hotspot __fabsf dependency | |
491 // All fabs() callers should call this function instead, which will implicitly | |
492 // convert the operand to double, avoiding a dependency on __fabsf which | |
493 // doesn't exist in early versions of Solaris 8. | |
494 inline double fabsd(double value) { | |
495 return fabs(value); | |
496 } | |
497 | |
498 inline jint low (jlong value) { return jint(value); } | |
499 inline jint high(jlong value) { return jint(value >> 32); } | |
500 | |
501 // the fancy casts are a hopefully portable way | |
502 // to do unsigned 32 to 64 bit type conversion | |
503 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; | |
504 *value |= (jlong)(julong)(juint)low; } | |
505 | |
506 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; | |
507 *value |= (jlong)high << 32; } | |
508 | |
509 inline jlong jlong_from(jint h, jint l) { | |
510 jlong result = 0; // initialization to avoid warning | |
511 set_high(&result, h); | |
512 set_low(&result, l); | |
513 return result; | |
514 } | |
515 | |
516 union jlong_accessor { | |
517 jint words[2]; | |
518 jlong long_value; | |
519 }; | |
520 | |
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521 void basic_types_init(); // cannot define here; uses assert |
0 | 522 |
523 | |
524 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java | |
525 enum BasicType { | |
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526 T_BOOLEAN = 4, |
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527 T_CHAR = 5, |
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528 T_FLOAT = 6, |
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529 T_DOUBLE = 7, |
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530 T_BYTE = 8, |
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531 T_SHORT = 9, |
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532 T_INT = 10, |
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533 T_LONG = 11, |
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534 T_OBJECT = 12, |
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535 T_ARRAY = 13, |
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536 T_VOID = 14, |
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537 T_ADDRESS = 15, |
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538 T_NARROWOOP = 16, |
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539 T_METADATA = 17, |
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540 T_NARROWKLASS = 18, |
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541 T_CONFLICT = 19, // for stack value type with conflicting contents |
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542 T_ILLEGAL = 99 |
0 | 543 }; |
544 | |
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545 inline bool is_java_primitive(BasicType t) { |
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546 return T_BOOLEAN <= t && t <= T_LONG; |
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547 } |
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548 |
710 | 549 inline bool is_subword_type(BasicType t) { |
550 // these guys are processed exactly like T_INT in calling sequences: | |
551 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT); | |
552 } | |
553 | |
554 inline bool is_signed_subword_type(BasicType t) { | |
555 return (t == T_BYTE || t == T_SHORT); | |
556 } | |
557 | |
0 | 558 // Convert a char from a classfile signature to a BasicType |
559 inline BasicType char2type(char c) { | |
560 switch( c ) { | |
561 case 'B': return T_BYTE; | |
562 case 'C': return T_CHAR; | |
563 case 'D': return T_DOUBLE; | |
564 case 'F': return T_FLOAT; | |
565 case 'I': return T_INT; | |
566 case 'J': return T_LONG; | |
567 case 'S': return T_SHORT; | |
568 case 'Z': return T_BOOLEAN; | |
569 case 'V': return T_VOID; | |
570 case 'L': return T_OBJECT; | |
571 case '[': return T_ARRAY; | |
572 } | |
573 return T_ILLEGAL; | |
574 } | |
575 | |
576 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar | |
577 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } | |
578 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements | |
579 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar | |
580 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } | |
581 extern BasicType name2type(const char* name); | |
582 | |
583 // Auxilary math routines | |
584 // least common multiple | |
585 extern size_t lcm(size_t a, size_t b); | |
586 | |
587 | |
588 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java | |
589 enum BasicTypeSize { | |
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590 T_BOOLEAN_size = 1, |
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591 T_CHAR_size = 1, |
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592 T_FLOAT_size = 1, |
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593 T_DOUBLE_size = 2, |
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594 T_BYTE_size = 1, |
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595 T_SHORT_size = 1, |
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596 T_INT_size = 1, |
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597 T_LONG_size = 2, |
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598 T_OBJECT_size = 1, |
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599 T_ARRAY_size = 1, |
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600 T_NARROWOOP_size = 1, |
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601 T_NARROWKLASS_size = 1, |
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602 T_VOID_size = 0 |
0 | 603 }; |
604 | |
605 | |
606 // maps a BasicType to its instance field storage type: | |
607 // all sub-word integral types are widened to T_INT | |
608 extern BasicType type2field[T_CONFLICT+1]; | |
609 extern BasicType type2wfield[T_CONFLICT+1]; | |
610 | |
611 | |
612 // size in bytes | |
613 enum ArrayElementSize { | |
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614 T_BOOLEAN_aelem_bytes = 1, |
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615 T_CHAR_aelem_bytes = 2, |
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616 T_FLOAT_aelem_bytes = 4, |
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617 T_DOUBLE_aelem_bytes = 8, |
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618 T_BYTE_aelem_bytes = 1, |
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619 T_SHORT_aelem_bytes = 2, |
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620 T_INT_aelem_bytes = 4, |
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621 T_LONG_aelem_bytes = 8, |
0 | 622 #ifdef _LP64 |
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623 T_OBJECT_aelem_bytes = 8, |
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624 T_ARRAY_aelem_bytes = 8, |
0 | 625 #else |
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626 T_OBJECT_aelem_bytes = 4, |
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627 T_ARRAY_aelem_bytes = 4, |
0 | 628 #endif |
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629 T_NARROWOOP_aelem_bytes = 4, |
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630 T_NARROWKLASS_aelem_bytes = 4, |
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631 T_VOID_aelem_bytes = 0 |
0 | 632 }; |
633 | |
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634 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element |
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635 #ifdef ASSERT |
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636 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts |
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637 #else |
1763 | 638 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; } |
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639 #endif |
0 | 640 |
641 | |
642 // JavaValue serves as a container for arbitrary Java values. | |
643 | |
644 class JavaValue { | |
645 | |
646 public: | |
647 typedef union JavaCallValue { | |
648 jfloat f; | |
649 jdouble d; | |
650 jint i; | |
651 jlong l; | |
652 jobject h; | |
653 } JavaCallValue; | |
654 | |
655 private: | |
656 BasicType _type; | |
657 JavaCallValue _value; | |
658 | |
659 public: | |
660 JavaValue(BasicType t = T_ILLEGAL) { _type = t; } | |
661 | |
662 JavaValue(jfloat value) { | |
663 _type = T_FLOAT; | |
664 _value.f = value; | |
665 } | |
666 | |
667 JavaValue(jdouble value) { | |
668 _type = T_DOUBLE; | |
669 _value.d = value; | |
670 } | |
671 | |
672 jfloat get_jfloat() const { return _value.f; } | |
673 jdouble get_jdouble() const { return _value.d; } | |
674 jint get_jint() const { return _value.i; } | |
675 jlong get_jlong() const { return _value.l; } | |
676 jobject get_jobject() const { return _value.h; } | |
677 JavaCallValue* get_value_addr() { return &_value; } | |
678 BasicType get_type() const { return _type; } | |
679 | |
680 void set_jfloat(jfloat f) { _value.f = f;} | |
681 void set_jdouble(jdouble d) { _value.d = d;} | |
682 void set_jint(jint i) { _value.i = i;} | |
683 void set_jlong(jlong l) { _value.l = l;} | |
684 void set_jobject(jobject h) { _value.h = h;} | |
685 void set_type(BasicType t) { _type = t; } | |
686 | |
687 jboolean get_jboolean() const { return (jboolean) (_value.i);} | |
688 jbyte get_jbyte() const { return (jbyte) (_value.i);} | |
689 jchar get_jchar() const { return (jchar) (_value.i);} | |
690 jshort get_jshort() const { return (jshort) (_value.i);} | |
691 | |
692 }; | |
693 | |
694 | |
695 #define STACK_BIAS 0 | |
696 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff | |
697 // in order to extend the reach of the stack pointer. | |
698 #if defined(SPARC) && defined(_LP64) | |
699 #undef STACK_BIAS | |
700 #define STACK_BIAS 0x7ff | |
701 #endif | |
702 | |
703 | |
704 // TosState describes the top-of-stack state before and after the execution of | |
705 // a bytecode or method. The top-of-stack value may be cached in one or more CPU | |
706 // registers. The TosState corresponds to the 'machine represention' of this cached | |
707 // value. There's 4 states corresponding to the JAVA types int, long, float & double | |
708 // as well as a 5th state in case the top-of-stack value is actually on the top | |
709 // of stack (in memory) and thus not cached. The atos state corresponds to the itos | |
710 // state when it comes to machine representation but is used separately for (oop) | |
711 // type specific operations (e.g. verification code). | |
712 | |
713 enum TosState { // describes the tos cache contents | |
714 btos = 0, // byte, bool tos cached | |
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715 ctos = 1, // char tos cached |
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716 stos = 2, // short tos cached |
0 | 717 itos = 3, // int tos cached |
718 ltos = 4, // long tos cached | |
719 ftos = 5, // float tos cached | |
720 dtos = 6, // double tos cached | |
721 atos = 7, // object cached | |
722 vtos = 8, // tos not cached | |
723 number_of_states, | |
724 ilgl // illegal state: should not occur | |
725 }; | |
726 | |
727 | |
728 inline TosState as_TosState(BasicType type) { | |
729 switch (type) { | |
730 case T_BYTE : return btos; | |
726
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731 case T_BOOLEAN: return btos; // FIXME: Add ztos |
0 | 732 case T_CHAR : return ctos; |
733 case T_SHORT : return stos; | |
734 case T_INT : return itos; | |
735 case T_LONG : return ltos; | |
736 case T_FLOAT : return ftos; | |
737 case T_DOUBLE : return dtos; | |
738 case T_VOID : return vtos; | |
739 case T_ARRAY : // fall through | |
740 case T_OBJECT : return atos; | |
741 } | |
742 return ilgl; | |
743 } | |
744 | |
726
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745 inline BasicType as_BasicType(TosState state) { |
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746 switch (state) { |
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747 //case ztos: return T_BOOLEAN;//FIXME |
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748 case btos : return T_BYTE; |
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749 case ctos : return T_CHAR; |
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750 case stos : return T_SHORT; |
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751 case itos : return T_INT; |
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752 case ltos : return T_LONG; |
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753 case ftos : return T_FLOAT; |
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754 case dtos : return T_DOUBLE; |
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755 case atos : return T_OBJECT; |
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756 case vtos : return T_VOID; |
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757 } |
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758 return T_ILLEGAL; |
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759 } |
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760 |
0 | 761 |
762 // Helper function to convert BasicType info into TosState | |
763 // Note: Cannot define here as it uses global constant at the time being. | |
764 TosState as_TosState(BasicType type); | |
765 | |
766 | |
767 // JavaThreadState keeps track of which part of the code a thread is executing in. This | |
768 // information is needed by the safepoint code. | |
769 // | |
770 // There are 4 essential states: | |
771 // | |
772 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code) | |
773 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles | |
774 // _thread_in_vm : Executing in the vm | |
775 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub) | |
776 // | |
777 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in | |
778 // a transition from one state to another. These extra states makes it possible for the safepoint code to | |
779 // handle certain thread_states without having to suspend the thread - making the safepoint code faster. | |
780 // | |
781 // Given a state, the xxx_trans state can always be found by adding 1. | |
782 // | |
783 enum JavaThreadState { | |
784 _thread_uninitialized = 0, // should never happen (missing initialization) | |
785 _thread_new = 2, // just starting up, i.e., in process of being initialized | |
786 _thread_new_trans = 3, // corresponding transition state (not used, included for completness) | |
787 _thread_in_native = 4, // running in native code | |
788 _thread_in_native_trans = 5, // corresponding transition state | |
789 _thread_in_vm = 6, // running in VM | |
790 _thread_in_vm_trans = 7, // corresponding transition state | |
791 _thread_in_Java = 8, // running in Java or in stub code | |
792 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness) | |
793 _thread_blocked = 10, // blocked in vm | |
794 _thread_blocked_trans = 11, // corresponding transition state | |
795 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation | |
796 }; | |
797 | |
798 | |
799 // Handy constants for deciding which compiler mode to use. | |
800 enum MethodCompilation { | |
801 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation | |
802 InvalidOSREntryBci = -2 | |
803 }; | |
804 | |
805 // Enumeration to distinguish tiers of compilation | |
806 enum CompLevel { | |
1783 | 807 CompLevel_any = -1, |
808 CompLevel_all = -1, | |
809 CompLevel_none = 0, // Interpreter | |
810 CompLevel_simple = 1, // C1 | |
811 CompLevel_limited_profile = 2, // C1, invocation & backedge counters | |
812 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo | |
2447 | 813 CompLevel_full_optimization = 4, // C2 or Shark |
0 | 814 |
2447 | 815 #if defined(COMPILER2) || defined(SHARK) |
1783 | 816 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered |
817 #elif defined(COMPILER1) | |
818 CompLevel_highest_tier = CompLevel_simple, // pure C1 | |
0 | 819 #else |
1783 | 820 CompLevel_highest_tier = CompLevel_none, |
821 #endif | |
822 | |
823 #if defined(TIERED) | |
824 CompLevel_initial_compile = CompLevel_full_profile // tiered | |
825 #elif defined(COMPILER1) | |
826 CompLevel_initial_compile = CompLevel_simple // pure C1 | |
2447 | 827 #elif defined(COMPILER2) || defined(SHARK) |
1783 | 828 CompLevel_initial_compile = CompLevel_full_optimization // pure C2 |
829 #else | |
830 CompLevel_initial_compile = CompLevel_none | |
831 #endif | |
0 | 832 }; |
833 | |
1783 | 834 inline bool is_c1_compile(int comp_level) { |
835 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization; | |
0 | 836 } |
1783 | 837 |
838 inline bool is_c2_compile(int comp_level) { | |
0 | 839 return comp_level == CompLevel_full_optimization; |
840 } | |
1783 | 841 |
0 | 842 inline bool is_highest_tier_compile(int comp_level) { |
843 return comp_level == CompLevel_highest_tier; | |
844 } | |
845 | |
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846 inline bool is_compile(int comp_level) { |
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847 return is_c1_compile(comp_level) || is_c2_compile(comp_level); |
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848 } |
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849 |
0 | 850 //---------------------------------------------------------------------------------------------------- |
851 // 'Forward' declarations of frequently used classes | |
852 // (in order to reduce interface dependencies & reduce | |
853 // number of unnecessary compilations after changes) | |
854 | |
855 class symbolTable; | |
856 class ClassFileStream; | |
857 | |
858 class Event; | |
859 | |
860 class Thread; | |
861 class VMThread; | |
862 class JavaThread; | |
863 class Threads; | |
864 | |
865 class VM_Operation; | |
866 class VMOperationQueue; | |
867 | |
868 class CodeBlob; | |
869 class nmethod; | |
870 class OSRAdapter; | |
871 class I2CAdapter; | |
872 class C2IAdapter; | |
873 class CompiledIC; | |
874 class relocInfo; | |
875 class ScopeDesc; | |
876 class PcDesc; | |
877 | |
878 class Recompiler; | |
879 class Recompilee; | |
880 class RecompilationPolicy; | |
881 class RFrame; | |
882 class CompiledRFrame; | |
883 class InterpretedRFrame; | |
884 | |
885 class frame; | |
886 | |
887 class vframe; | |
888 class javaVFrame; | |
889 class interpretedVFrame; | |
890 class compiledVFrame; | |
891 class deoptimizedVFrame; | |
892 class externalVFrame; | |
893 class entryVFrame; | |
894 | |
895 class RegisterMap; | |
896 | |
897 class Mutex; | |
898 class Monitor; | |
899 class BasicLock; | |
900 class BasicObjectLock; | |
901 | |
902 class PeriodicTask; | |
903 | |
904 class JavaCallWrapper; | |
905 | |
906 class oopDesc; | |
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907 class metaDataOopDesc; |
0 | 908 |
909 class NativeCall; | |
910 | |
911 class zone; | |
912 | |
913 class StubQueue; | |
914 | |
915 class outputStream; | |
916 | |
917 class ResourceArea; | |
918 | |
919 class DebugInformationRecorder; | |
920 class ScopeValue; | |
921 class CompressedStream; | |
922 class DebugInfoReadStream; | |
923 class DebugInfoWriteStream; | |
924 class LocationValue; | |
925 class ConstantValue; | |
926 class IllegalValue; | |
927 | |
928 class PrivilegedElement; | |
929 class MonitorArray; | |
930 | |
931 class MonitorInfo; | |
932 | |
933 class OffsetClosure; | |
934 class OopMapCache; | |
935 class InterpreterOopMap; | |
936 class OopMapCacheEntry; | |
937 class OSThread; | |
938 | |
939 typedef int (*OSThreadStartFunc)(void*); | |
940 | |
941 class Space; | |
942 | |
943 class JavaValue; | |
944 class methodHandle; | |
945 class JavaCallArguments; | |
946 | |
947 // Basic support for errors (general debug facilities not defined at this point fo the include phase) | |
948 | |
949 extern void basic_fatal(const char* msg); | |
950 | |
951 | |
952 //---------------------------------------------------------------------------------------------------- | |
953 // Special constants for debugging | |
954 | |
955 const jint badInt = -3; // generic "bad int" value | |
956 const long badAddressVal = -2; // generic "bad address" value | |
957 const long badOopVal = -1; // generic "bad oop" value | |
958 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC | |
959 const int badHandleValue = 0xBC; // value used to zap vm handle area | |
960 const int badResourceValue = 0xAB; // value used to zap resource area | |
961 const int freeBlockPad = 0xBA; // value used to pad freed blocks. | |
962 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. | |
963 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area | |
964 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC | |
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965 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC |
0 | 966 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation |
967 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation | |
968 | |
969 | |
970 // (These must be implemented as #defines because C++ compilers are | |
971 // not obligated to inline non-integral constants!) | |
972 #define badAddress ((address)::badAddressVal) | |
973 #define badOop ((oop)::badOopVal) | |
974 #define badHeapWord (::badHeapWordVal) | |
975 #define badJNIHandle ((oop)::badJNIHandleVal) | |
976 | |
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977 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit) |
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978 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17)) |
0 | 979 |
980 //---------------------------------------------------------------------------------------------------- | |
981 // Utility functions for bitfield manipulations | |
982 | |
983 const intptr_t AllBits = ~0; // all bits set in a word | |
984 const intptr_t NoBits = 0; // no bits set in a word | |
985 const jlong NoLongBits = 0; // no bits set in a long | |
986 const intptr_t OneBit = 1; // only right_most bit set in a word | |
987 | |
988 // get a word with the n.th or the right-most or left-most n bits set | |
989 // (note: #define used only so that they can be used in enum constant definitions) | |
990 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n)) | |
991 #define right_n_bits(n) (nth_bit(n) - 1) | |
992 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n))) | |
993 | |
994 // bit-operations using a mask m | |
995 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } | |
996 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } | |
997 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } | |
998 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } | |
999 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } | |
1000 | |
1001 // bit-operations using the n.th bit | |
1002 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } | |
1003 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } | |
1004 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; } | |
1005 | |
1006 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!) | |
1007 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) { | |
1008 return mask_bits(x >> start_bit_no, right_n_bits(field_length)); | |
1009 } | |
1010 | |
1011 | |
1012 //---------------------------------------------------------------------------------------------------- | |
1013 // Utility functions for integers | |
1014 | |
1015 // Avoid use of global min/max macros which may cause unwanted double | |
1016 // evaluation of arguments. | |
1017 #ifdef max | |
1018 #undef max | |
1019 #endif | |
1020 | |
1021 #ifdef min | |
1022 #undef min | |
1023 #endif | |
1024 | |
1025 #define max(a,b) Do_not_use_max_use_MAX2_instead | |
1026 #define min(a,b) Do_not_use_min_use_MIN2_instead | |
1027 | |
1028 // It is necessary to use templates here. Having normal overloaded | |
1029 // functions does not work because it is necessary to provide both 32- | |
1030 // and 64-bit overloaded functions, which does not work, and having | |
1031 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) | |
1032 // will be even more error-prone than macros. | |
1033 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } | |
1034 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } | |
1035 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } | |
1036 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } | |
1037 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } | |
1038 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } | |
1039 | |
1040 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } | |
1041 | |
1042 // true if x is a power of 2, false otherwise | |
1043 inline bool is_power_of_2(intptr_t x) { | |
1044 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); | |
1045 } | |
1046 | |
1047 // long version of is_power_of_2 | |
1048 inline bool is_power_of_2_long(jlong x) { | |
1049 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); | |
1050 } | |
1051 | |
1052 //* largest i such that 2^i <= x | |
1053 // A negative value of 'x' will return '31' | |
1054 inline int log2_intptr(intptr_t x) { | |
1055 int i = -1; | |
1056 uintptr_t p = 1; | |
1057 while (p != 0 && p <= (uintptr_t)x) { | |
1058 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) | |
1059 i++; p *= 2; | |
1060 } | |
1061 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) | |
605 | 1062 // (if p = 0 then overflow occurred and i = 31) |
0 | 1063 return i; |
1064 } | |
1065 | |
1066 //* largest i such that 2^i <= x | |
1067 // A negative value of 'x' will return '63' | |
1068 inline int log2_long(jlong x) { | |
1069 int i = -1; | |
1070 julong p = 1; | |
1071 while (p != 0 && p <= (julong)x) { | |
1072 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) | |
1073 i++; p *= 2; | |
1074 } | |
1075 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) | |
605 | 1076 // (if p = 0 then overflow occurred and i = 63) |
0 | 1077 return i; |
1078 } | |
1079 | |
1080 //* the argument must be exactly a power of 2 | |
1081 inline int exact_log2(intptr_t x) { | |
1082 #ifdef ASSERT | |
1083 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); | |
1084 #endif | |
1085 return log2_intptr(x); | |
1086 } | |
1087 | |
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1088 //* the argument must be exactly a power of 2 |
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1089 inline int exact_log2_long(jlong x) { |
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1090 #ifdef ASSERT |
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1091 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); |
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1092 #endif |
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1093 return log2_long(x); |
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1094 } |
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1095 |
0 | 1096 |
1097 // returns integer round-up to the nearest multiple of s (s must be a power of two) | |
1098 inline intptr_t round_to(intptr_t x, uintx s) { | |
1099 #ifdef ASSERT | |
1100 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); | |
1101 #endif | |
1102 const uintx m = s - 1; | |
1103 return mask_bits(x + m, ~m); | |
1104 } | |
1105 | |
1106 // returns integer round-down to the nearest multiple of s (s must be a power of two) | |
1107 inline intptr_t round_down(intptr_t x, uintx s) { | |
1108 #ifdef ASSERT | |
1109 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); | |
1110 #endif | |
1111 const uintx m = s - 1; | |
1112 return mask_bits(x, ~m); | |
1113 } | |
1114 | |
1115 | |
1116 inline bool is_odd (intx x) { return x & 1; } | |
1117 inline bool is_even(intx x) { return !is_odd(x); } | |
1118 | |
1119 // "to" should be greater than "from." | |
1120 inline intx byte_size(void* from, void* to) { | |
1121 return (address)to - (address)from; | |
1122 } | |
1123 | |
1124 //---------------------------------------------------------------------------------------------------- | |
1125 // Avoid non-portable casts with these routines (DEPRECATED) | |
1126 | |
1127 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE | |
1128 // Bytes is optimized machine-specifically and may be much faster then the portable routines below. | |
1129 | |
1130 // Given sequence of four bytes, build into a 32-bit word | |
1131 // following the conventions used in class files. | |
1132 // On the 386, this could be realized with a simple address cast. | |
1133 // | |
1134 | |
1135 // This routine takes eight bytes: | |
1136 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { | |
1789
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1137 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 )) |
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1138 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 )) |
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1139 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 )) |
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1140 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 )) |
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1141 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 )) |
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1142 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 )) |
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1143 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 )) |
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1144 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 )); |
0 | 1145 } |
1146 | |
1147 // This routine takes four bytes: | |
1148 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { | |
1789
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1149 return (( u4(c1) << 24 ) & 0xff000000) |
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1150 | (( u4(c2) << 16 ) & 0x00ff0000) |
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1151 | (( u4(c3) << 8 ) & 0x0000ff00) |
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1152 | (( u4(c4) << 0 ) & 0x000000ff); |
0 | 1153 } |
1154 | |
1155 // And this one works if the four bytes are contiguous in memory: | |
1156 inline u4 build_u4_from( u1* p ) { | |
1157 return build_u4_from( p[0], p[1], p[2], p[3] ); | |
1158 } | |
1159 | |
1160 // Ditto for two-byte ints: | |
1161 inline u2 build_u2_from( u1 c1, u1 c2 ) { | |
1789
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1162 return u2((( u2(c1) << 8 ) & 0xff00) |
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1163 | (( u2(c2) << 0 ) & 0x00ff)); |
0 | 1164 } |
1165 | |
1166 // And this one works if the two bytes are contiguous in memory: | |
1167 inline u2 build_u2_from( u1* p ) { | |
1168 return build_u2_from( p[0], p[1] ); | |
1169 } | |
1170 | |
1171 // Ditto for floats: | |
1172 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { | |
1173 u4 u = build_u4_from( c1, c2, c3, c4 ); | |
1174 return *(jfloat*)&u; | |
1175 } | |
1176 | |
1177 inline jfloat build_float_from( u1* p ) { | |
1178 u4 u = build_u4_from( p ); | |
1179 return *(jfloat*)&u; | |
1180 } | |
1181 | |
1182 | |
1183 // now (64-bit) longs | |
1184 | |
1185 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { | |
1789
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1186 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 )) |
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1187 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 )) |
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1188 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 )) |
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1189 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 )) |
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1190 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 )) |
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1191 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 )) |
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1192 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 )) |
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1193 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 )); |
0 | 1194 } |
1195 | |
1196 inline jlong build_long_from( u1* p ) { | |
1197 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); | |
1198 } | |
1199 | |
1200 | |
1201 // Doubles, too! | |
1202 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { | |
1203 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); | |
1204 return *(jdouble*)&u; | |
1205 } | |
1206 | |
1207 inline jdouble build_double_from( u1* p ) { | |
1208 jlong u = build_long_from( p ); | |
1209 return *(jdouble*)&u; | |
1210 } | |
1211 | |
1212 | |
1213 // Portable routines to go the other way: | |
1214 | |
1215 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { | |
1216 c1 = u1(x >> 8); | |
1217 c2 = u1(x); | |
1218 } | |
1219 | |
1220 inline void explode_short_to( u2 x, u1* p ) { | |
1221 explode_short_to( x, p[0], p[1]); | |
1222 } | |
1223 | |
1224 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { | |
1225 c1 = u1(x >> 24); | |
1226 c2 = u1(x >> 16); | |
1227 c3 = u1(x >> 8); | |
1228 c4 = u1(x); | |
1229 } | |
1230 | |
1231 inline void explode_int_to( u4 x, u1* p ) { | |
1232 explode_int_to( x, p[0], p[1], p[2], p[3]); | |
1233 } | |
1234 | |
1235 | |
1236 // Pack and extract shorts to/from ints: | |
1237 | |
1238 inline int extract_low_short_from_int(jint x) { | |
1239 return x & 0xffff; | |
1240 } | |
1241 | |
1242 inline int extract_high_short_from_int(jint x) { | |
1243 return (x >> 16) & 0xffff; | |
1244 } | |
1245 | |
1246 inline int build_int_from_shorts( jushort low, jushort high ) { | |
1247 return ((int)((unsigned int)high << 16) | (unsigned int)low); | |
1248 } | |
1249 | |
1250 // Printf-style formatters for fixed- and variable-width types as pointers and | |
3960 | 1251 // integers. These are derived from the definitions in inttypes.h. If the platform |
1252 // doesn't provide appropriate definitions, they should be provided in | |
1253 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) | |
0 | 1254 |
2361 | 1255 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false") |
2152 | 1256 |
0 | 1257 // Format 32-bit quantities. |
3960 | 1258 #define INT32_FORMAT "%" PRId32 |
1259 #define UINT32_FORMAT "%" PRIu32 | |
1260 #define INT32_FORMAT_W(width) "%" #width PRId32 | |
1261 #define UINT32_FORMAT_W(width) "%" #width PRIu32 | |
0 | 1262 |
3960 | 1263 #define PTR32_FORMAT "0x%08" PRIx32 |
0 | 1264 |
1265 // Format 64-bit quantities. | |
3960 | 1266 #define INT64_FORMAT "%" PRId64 |
1267 #define UINT64_FORMAT "%" PRIu64 | |
1268 #define INT64_FORMAT_W(width) "%" #width PRId64 | |
1269 #define UINT64_FORMAT_W(width) "%" #width PRIu64 | |
0 | 1270 |
3960 | 1271 #define PTR64_FORMAT "0x%016" PRIx64 |
0 | 1272 |
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1273 // Format jlong, if necessary |
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1274 #ifndef JLONG_FORMAT |
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1275 #define JLONG_FORMAT INT64_FORMAT |
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1276 #endif |
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1277 #ifndef JULONG_FORMAT |
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1278 #define JULONG_FORMAT UINT64_FORMAT |
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1279 #endif |
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1280 |
3960 | 1281 // Format pointers which change size between 32- and 64-bit. |
0 | 1282 #ifdef _LP64 |
3960 | 1283 #define INTPTR_FORMAT "0x%016" PRIxPTR |
1284 #define PTR_FORMAT "0x%016" PRIxPTR | |
0 | 1285 #else // !_LP64 |
3960 | 1286 #define INTPTR_FORMAT "0x%08" PRIxPTR |
1287 #define PTR_FORMAT "0x%08" PRIxPTR | |
0 | 1288 #endif // _LP64 |
1289 | |
3960 | 1290 #define SSIZE_FORMAT "%" PRIdPTR |
1291 #define SIZE_FORMAT "%" PRIuPTR | |
1292 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR | |
1293 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR | |
1294 | |
1295 #define INTX_FORMAT "%" PRIdPTR | |
1296 #define UINTX_FORMAT "%" PRIuPTR | |
1297 #define INTX_FORMAT_W(width) "%" #width PRIdPTR | |
1298 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR | |
1299 | |
0 | 1300 |
1301 // Enable zap-a-lot if in debug version. | |
1302 | |
1303 # ifdef ASSERT | |
1304 # ifdef COMPILER2 | |
1305 # define ENABLE_ZAP_DEAD_LOCALS | |
1306 #endif /* COMPILER2 */ | |
1307 # endif /* ASSERT */ | |
1308 | |
1309 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) | |
1972 | 1310 |
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1311 // Dereference vptr |
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1312 // All C++ compilers that we know of have the vtbl pointer in the first |
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1313 // word. If there are exceptions, this function needs to be made compiler |
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1314 // specific. |
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1315 static inline void* dereference_vptr(void* addr) { |
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1316 return *(void**)addr; |
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1317 } |
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1318 |
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1319 |
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1320 #ifndef PRODUCT |
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1321 |
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1322 // For unit testing only |
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1323 class GlobalDefinitions { |
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1324 public: |
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1325 static void test_globals(); |
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1326 }; |
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1327 |
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1328 #endif // PRODUCT |
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1329 |
1972 | 1330 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP |