1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP
26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP
27
28 #ifndef __STDC_FORMAT_MACROS
29 #define __STDC_FORMAT_MACROS
30 #endif
31
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
41
42 #include "utilities/macros.hpp"
43
44 // This file holds all globally used constants & types, class (forward)
45 // declarations and a few frequently used utility functions.
46
47 //----------------------------------------------------------------------------------------------------
48 // Constants
49
50 const int LogBytesPerShort = 1;
51 const int LogBytesPerInt = 2;
52 #ifdef _LP64
53 const int LogBytesPerWord = 3;
54 #else
55 const int LogBytesPerWord = 2;
56 #endif
57 const int LogBytesPerLong = 3;
58
59 const int BytesPerShort = 1 << LogBytesPerShort;
60 const int BytesPerInt = 1 << LogBytesPerInt;
61 const int BytesPerWord = 1 << LogBytesPerWord;
62 const int BytesPerLong = 1 << LogBytesPerLong;
63
64 const int LogBitsPerByte = 3;
65 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort;
66 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt;
67 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord;
68 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong;
69
70 const int BitsPerByte = 1 << LogBitsPerByte;
71 const int BitsPerShort = 1 << LogBitsPerShort;
72 const int BitsPerInt = 1 << LogBitsPerInt;
73 const int BitsPerWord = 1 << LogBitsPerWord;
74 const int BitsPerLong = 1 << LogBitsPerLong;
75
76 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1;
77 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1;
78
79 const int WordsPerLong = 2; // Number of stack entries for longs
80
81 const int oopSize = sizeof(char*); // Full-width oop
82 extern int heapOopSize; // Oop within a java object
83 const int wordSize = sizeof(char*);
84 const int longSize = sizeof(jlong);
85 const int jintSize = sizeof(jint);
86 const int size_tSize = sizeof(size_t);
87
88 const int BytesPerOop = BytesPerWord; // Full-width oop
89
90 extern int LogBytesPerHeapOop; // Oop within a java object
91 extern int LogBitsPerHeapOop;
92 extern int BytesPerHeapOop;
93 extern int BitsPerHeapOop;
94
95 // Oop encoding heap max
96 extern uint64_t OopEncodingHeapMax;
97
98 const int BitsPerJavaInteger = 32;
99 const int BitsPerJavaLong = 64;
100 const int BitsPerSize_t = size_tSize * BitsPerByte;
101
102 // Size of a char[] needed to represent a jint as a string in decimal.
103 const int jintAsStringSize = 12;
104
105 // In fact this should be
106 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64);
107 // see os::set_memory_serialize_page()
108 #ifdef _LP64
109 const int SerializePageShiftCount = 4;
110 #else
111 const int SerializePageShiftCount = 3;
112 #endif
113
114 // An opaque struct of heap-word width, so that HeapWord* can be a generic
115 // pointer into the heap. We require that object sizes be measured in
116 // units of heap words, so that that
117 // HeapWord* hw;
118 // hw += oop(hw)->foo();
119 // works, where foo is a method (like size or scavenge) that returns the
120 // object size.
121 class HeapWord {
122 friend class VMStructs;
123 private:
124 char* i;
125 #ifndef PRODUCT
126 public:
127 char* value() { return i; }
128 #endif
129 };
130
131 // Analogous opaque struct for metadata allocated from
132 // metaspaces.
133 class MetaWord {
134 friend class VMStructs;
135 private:
136 char* i;
137 };
138
139 // HeapWordSize must be 2^LogHeapWordSize.
140 const int HeapWordSize = sizeof(HeapWord);
141 #ifdef _LP64
142 const int LogHeapWordSize = 3;
143 #else
144 const int LogHeapWordSize = 2;
145 #endif
146 const int HeapWordsPerLong = BytesPerLong / HeapWordSize;
147 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize;
148
149 // The larger HeapWordSize for 64bit requires larger heaps
150 // for the same application running in 64bit. See bug 4967770.
151 // The minimum alignment to a heap word size is done. Other
152 // parts of the memory system may required additional alignment
153 // and are responsible for those alignments.
154 #ifdef _LP64
155 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize)
156 #else
157 #define ScaleForWordSize(x) (x)
158 #endif
159
160 // The minimum number of native machine words necessary to contain "byte_size"
161 // bytes.
162 inline size_t heap_word_size(size_t byte_size) {
163 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize;
164 }
165
166
167 const size_t K = 1024;
168 const size_t M = K*K;
169 const size_t G = M*K;
170 const size_t HWperKB = K / sizeof(HeapWord);
171
172 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint
173 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint
174
175 // Constants for converting from a base unit to milli-base units. For
176 // example from seconds to milliseconds and microseconds
177
178 const int MILLIUNITS = 1000; // milli units per base unit
179 const int MICROUNITS = 1000000; // micro units per base unit
180 const int NANOUNITS = 1000000000; // nano units per base unit
181
182 const jlong NANOSECS_PER_SEC = CONST64(1000000000);
183 const jint NANOSECS_PER_MILLISEC = 1000000;
184
185 inline const char* proper_unit_for_byte_size(size_t s) {
186 #ifdef _LP64
187 if (s >= 10*G) {
188 return "G";
189 }
190 #endif
191 if (s >= 10*M) {
192 return "M";
193 } else if (s >= 10*K) {
194 return "K";
195 } else {
196 return "B";
197 }
198 }
199
200 template <class T>
201 inline T byte_size_in_proper_unit(T s) {
202 #ifdef _LP64
203 if (s >= 10*G) {
204 return (T)(s/G);
205 }
206 #endif
207 if (s >= 10*M) {
208 return (T)(s/M);
209 } else if (s >= 10*K) {
210 return (T)(s/K);
211 } else {
212 return s;
213 }
214 }
215
216 //----------------------------------------------------------------------------------------------------
217 // VM type definitions
218
219 // intx and uintx are the 'extended' int and 'extended' unsigned int types;
220 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform.
221
222 typedef intptr_t intx;
223 typedef uintptr_t uintx;
224
225 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1);
226 const intx max_intx = (uintx)min_intx - 1;
227 const uintx max_uintx = (uintx)-1;
228
229 // Table of values:
230 // sizeof intx 4 8
231 // min_intx 0x80000000 0x8000000000000000
232 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF
233 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF
234
235 typedef unsigned int uint; NEEDS_CLEANUP
236
237
238 //----------------------------------------------------------------------------------------------------
239 // Java type definitions
240
241 // All kinds of 'plain' byte addresses
242 typedef signed char s_char;
243 typedef unsigned char u_char;
244 typedef u_char* address;
245 typedef uintptr_t address_word; // unsigned integer which will hold a pointer
246 // except for some implementations of a C++
247 // linkage pointer to function. Should never
248 // need one of those to be placed in this
249 // type anyway.
250
251 // Utility functions to "portably" (?) bit twiddle pointers
252 // Where portable means keep ANSI C++ compilers quiet
253
254 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); }
255 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); }
256
257 // Utility functions to "portably" make cast to/from function pointers.
258
259 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; }
260 inline address_word castable_address(address x) { return address_word(x) ; }
261 inline address_word castable_address(void* x) { return address_word(x) ; }
262
263 // Pointer subtraction.
264 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have
265 // the range we might need to find differences from one end of the heap
266 // to the other.
267 // A typical use might be:
268 // if (pointer_delta(end(), top()) >= size) {
269 // // enough room for an object of size
270 // ...
271 // and then additions like
272 // ... top() + size ...
273 // are safe because we know that top() is at least size below end().
274 inline size_t pointer_delta(const void* left,
275 const void* right,
276 size_t element_size) {
277 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size;
278 }
279 // A version specialized for HeapWord*'s.
280 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) {
281 return pointer_delta(left, right, sizeof(HeapWord));
282 }
283 // A version specialized for MetaWord*'s.
284 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) {
285 return pointer_delta(left, right, sizeof(MetaWord));
286 }
287
288 //
289 // ANSI C++ does not allow casting from one pointer type to a function pointer
290 // directly without at best a warning. This macro accomplishes it silently
291 // In every case that is present at this point the value be cast is a pointer
292 // to a C linkage function. In somecase the type used for the cast reflects
293 // that linkage and a picky compiler would not complain. In other cases because
294 // there is no convenient place to place a typedef with extern C linkage (i.e
295 // a platform dependent header file) it doesn't. At this point no compiler seems
296 // picky enough to catch these instances (which are few). It is possible that
297 // using templates could fix these for all cases. This use of templates is likely
298 // so far from the middle of the road that it is likely to be problematic in
299 // many C++ compilers.
300 //
301 #define CAST_TO_FN_PTR(func_type, value) ((func_type)(castable_address(value)))
302 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr)))
303
304 // Unsigned byte types for os and stream.hpp
305
306 // Unsigned one, two, four and eigth byte quantities used for describing
307 // the .class file format. See JVM book chapter 4.
308
309 typedef jubyte u1;
310 typedef jushort u2;
311 typedef juint u4;
312 typedef julong u8;
313
314 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte
315 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort
316 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint
317 const julong max_julong = (julong)-1; // 0xFF....FF largest julong
318
319 typedef jbyte s1;
320 typedef jshort s2;
321 typedef jint s4;
322 typedef jlong s8;
323
324 //----------------------------------------------------------------------------------------------------
325 // JVM spec restrictions
326
327 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134)
328
329 // Default ProtectionDomainCacheSize values
330
331 const int defaultProtectionDomainCacheSize = NOT_LP64(137) LP64_ONLY(2017);
332
333 //----------------------------------------------------------------------------------------------------
334 // Default and minimum StringTableSize values
335
336 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013);
337 const int minimumStringTableSize = 1009;
338
339 const int defaultSymbolTableSize = 20011;
340 const int minimumSymbolTableSize = 1009;
341
342
343 //----------------------------------------------------------------------------------------------------
344 // HotSwap - for JVMTI aka Class File Replacement and PopFrame
345 //
346 // Determines whether on-the-fly class replacement and frame popping are enabled.
347
348 #define HOTSWAP
349
350 //----------------------------------------------------------------------------------------------------
351 // Object alignment, in units of HeapWords.
352 //
353 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and
354 // reference fields can be naturally aligned.
355
356 extern int MinObjAlignment;
357 extern int MinObjAlignmentInBytes;
358 extern int MinObjAlignmentInBytesMask;
359
360 extern int LogMinObjAlignment;
361 extern int LogMinObjAlignmentInBytes;
362
363 const int LogKlassAlignmentInBytes = 3;
364 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize;
365 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes;
366 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize;
367
368 // Klass encoding metaspace max size
369 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes;
370
371 // Machine dependent stuff
372
373 #ifdef TARGET_ARCH_x86
374 # include "globalDefinitions_x86.hpp"
375 #endif
376 #ifdef TARGET_ARCH_sparc
377 # include "globalDefinitions_sparc.hpp"
378 #endif
379 #ifdef TARGET_ARCH_zero
380 # include "globalDefinitions_zero.hpp"
381 #endif
382 #ifdef TARGET_ARCH_arm
383 # include "globalDefinitions_arm.hpp"
384 #endif
385 #ifdef TARGET_ARCH_ppc
386 # include "globalDefinitions_ppc.hpp"
387 #endif
388
389 /*
390 * If a platform does not support native stack walking
391 * the platform specific globalDefinitions (above)
392 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0
393 */
394 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
395 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1
396 #endif
397
398 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348.
399 // Note: this value must be a power of 2
400
401 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord)
402
403 // Signed variants of alignment helpers. There are two versions of each, a macro
404 // for use in places like enum definitions that require compile-time constant
405 // expressions and a function for all other places so as to get type checking.
406
407 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1))
408
409 inline bool is_size_aligned(size_t size, size_t alignment) {
410 return align_size_up_(size, alignment) == size;
411 }
412
413 inline bool is_ptr_aligned(void* ptr, size_t alignment) {
414 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr;
415 }
416
417 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) {
418 return align_size_up_(size, alignment);
419 }
420
421 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1))
422
423 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) {
424 return align_size_down_(size, alignment);
425 }
426
427 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment)))
428
429 inline void* align_ptr_up(void* ptr, size_t alignment) {
430 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment);
431 }
432
433 inline void* align_ptr_down(void* ptr, size_t alignment) {
434 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment);
435 }
436
437 // Align objects by rounding up their size, in HeapWord units.
438
439 #define align_object_size_(size) align_size_up_(size, MinObjAlignment)
440
441 inline intptr_t align_object_size(intptr_t size) {
442 return align_size_up(size, MinObjAlignment);
443 }
444
445 inline bool is_object_aligned(intptr_t addr) {
446 return addr == align_object_size(addr);
447 }
448
449 // Pad out certain offsets to jlong alignment, in HeapWord units.
450
451 inline intptr_t align_object_offset(intptr_t offset) {
452 return align_size_up(offset, HeapWordsPerLong);
453 }
454
455 inline void* align_pointer_up(const void* addr, size_t size) {
456 return (void*) align_size_up_((uintptr_t)addr, size);
457 }
458
459 // Align down with a lower bound. If the aligning results in 0, return 'alignment'.
460
461 inline size_t align_size_down_bounded(size_t size, size_t alignment) {
462 size_t aligned_size = align_size_down_(size, alignment);
463 return aligned_size > 0 ? aligned_size : alignment;
464 }
465
466 // Clamp an address to be within a specific page
467 // 1. If addr is on the page it is returned as is
468 // 2. If addr is above the page_address the start of the *next* page will be returned
469 // 3. Otherwise, if addr is below the page_address the start of the page will be returned
470 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) {
471 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) {
472 // address is in the specified page, just return it as is
473 return addr;
474 } else if (addr > page_address) {
475 // address is above specified page, return start of next page
476 return (address)align_size_down(intptr_t(page_address), page_size) + page_size;
477 } else {
478 // address is below specified page, return start of page
479 return (address)align_size_down(intptr_t(page_address), page_size);
480 }
481 }
482
483
484 // The expected size in bytes of a cache line, used to pad data structures.
485 #define DEFAULT_CACHE_LINE_SIZE 64
486
487
488 //----------------------------------------------------------------------------------------------------
489 // Utility macros for compilers
490 // used to silence compiler warnings
491
492 #define Unused_Variable(var) var
493
494
495 //----------------------------------------------------------------------------------------------------
496 // Miscellaneous
497
498 // 6302670 Eliminate Hotspot __fabsf dependency
499 // All fabs() callers should call this function instead, which will implicitly
500 // convert the operand to double, avoiding a dependency on __fabsf which
501 // doesn't exist in early versions of Solaris 8.
502 inline double fabsd(double value) {
503 return fabs(value);
504 }
505
506 inline jint low (jlong value) { return jint(value); }
507 inline jint high(jlong value) { return jint(value >> 32); }
508
509 // the fancy casts are a hopefully portable way
510 // to do unsigned 32 to 64 bit type conversion
511 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32;
512 *value |= (jlong)(julong)(juint)low; }
513
514 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff;
515 *value |= (jlong)high << 32; }
516
517 inline jlong jlong_from(jint h, jint l) {
518 jlong result = 0; // initialization to avoid warning
519 set_high(&result, h);
520 set_low(&result, l);
521 return result;
522 }
523
524 union jlong_accessor {
525 jint words[2];
526 jlong long_value;
527 };
528
529 void basic_types_init(); // cannot define here; uses assert
530
531
532 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
533 enum BasicType {
534 T_BOOLEAN = 4,
535 T_CHAR = 5,
536 T_FLOAT = 6,
537 T_DOUBLE = 7,
538 T_BYTE = 8,
539 T_SHORT = 9,
540 T_INT = 10,
541 T_LONG = 11,
542 T_OBJECT = 12,
543 T_ARRAY = 13,
544 T_VOID = 14,
545 T_ADDRESS = 15,
546 T_NARROWOOP = 16,
547 T_METADATA = 17,
548 T_NARROWKLASS = 18,
549 T_CONFLICT = 19, // for stack value type with conflicting contents
550 T_ILLEGAL = 99
551 };
552
553 inline bool is_java_primitive(BasicType t) {
554 return T_BOOLEAN <= t && t <= T_LONG;
555 }
556
557 inline bool is_subword_type(BasicType t) {
558 // these guys are processed exactly like T_INT in calling sequences:
559 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT);
560 }
561
562 inline bool is_signed_subword_type(BasicType t) {
563 return (t == T_BYTE || t == T_SHORT);
564 }
565
566 // Convert a char from a classfile signature to a BasicType
567 inline BasicType char2type(char c) {
568 switch( c ) {
569 case 'B': return T_BYTE;
570 case 'C': return T_CHAR;
571 case 'D': return T_DOUBLE;
572 case 'F': return T_FLOAT;
573 case 'I': return T_INT;
574 case 'J': return T_LONG;
575 case 'S': return T_SHORT;
576 case 'Z': return T_BOOLEAN;
577 case 'V': return T_VOID;
578 case 'L': return T_OBJECT;
579 case '[': return T_ARRAY;
580 }
581 return T_ILLEGAL;
582 }
583
584 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
585 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; }
586 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements
587 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
588 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; }
589 extern BasicType name2type(const char* name);
590
591 // Auxilary math routines
592 // least common multiple
593 extern size_t lcm(size_t a, size_t b);
594
595
596 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
597 enum BasicTypeSize {
598 T_BOOLEAN_size = 1,
599 T_CHAR_size = 1,
600 T_FLOAT_size = 1,
601 T_DOUBLE_size = 2,
602 T_BYTE_size = 1,
603 T_SHORT_size = 1,
604 T_INT_size = 1,
605 T_LONG_size = 2,
606 T_OBJECT_size = 1,
607 T_ARRAY_size = 1,
608 T_NARROWOOP_size = 1,
609 T_NARROWKLASS_size = 1,
610 T_VOID_size = 0
611 };
612
613
614 // maps a BasicType to its instance field storage type:
615 // all sub-word integral types are widened to T_INT
616 extern BasicType type2field[T_CONFLICT+1];
617 extern BasicType type2wfield[T_CONFLICT+1];
618
619
620 // size in bytes
621 enum ArrayElementSize {
622 T_BOOLEAN_aelem_bytes = 1,
623 T_CHAR_aelem_bytes = 2,
624 T_FLOAT_aelem_bytes = 4,
625 T_DOUBLE_aelem_bytes = 8,
626 T_BYTE_aelem_bytes = 1,
627 T_SHORT_aelem_bytes = 2,
628 T_INT_aelem_bytes = 4,
629 T_LONG_aelem_bytes = 8,
630 #ifdef _LP64
631 T_OBJECT_aelem_bytes = 8,
632 T_ARRAY_aelem_bytes = 8,
633 #else
634 T_OBJECT_aelem_bytes = 4,
635 T_ARRAY_aelem_bytes = 4,
636 #endif
637 T_NARROWOOP_aelem_bytes = 4,
638 T_NARROWKLASS_aelem_bytes = 4,
639 T_VOID_aelem_bytes = 0
640 };
641
642 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element
643 #ifdef ASSERT
644 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts
645 #else
646 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; }
647 #endif
648
649
650 // JavaValue serves as a container for arbitrary Java values.
651
652 class JavaValue {
653
654 public:
655 typedef union JavaCallValue {
656 jfloat f;
657 jdouble d;
658 jint i;
659 jlong l;
660 jobject h;
661 } JavaCallValue;
662
663 private:
664 BasicType _type;
665 JavaCallValue _value;
666
667 public:
668 JavaValue(BasicType t = T_ILLEGAL) { _type = t; }
669
670 JavaValue(jfloat value) {
671 _type = T_FLOAT;
672 _value.f = value;
673 }
674
675 JavaValue(jdouble value) {
676 _type = T_DOUBLE;
677 _value.d = value;
678 }
679
680 jfloat get_jfloat() const { return _value.f; }
681 jdouble get_jdouble() const { return _value.d; }
682 jint get_jint() const { return _value.i; }
683 jlong get_jlong() const { return _value.l; }
684 jobject get_jobject() const { return _value.h; }
685 JavaCallValue* get_value_addr() { return &_value; }
686 BasicType get_type() const { return _type; }
687
688 void set_jfloat(jfloat f) { _value.f = f;}
689 void set_jdouble(jdouble d) { _value.d = d;}
690 void set_jint(jint i) { _value.i = i;}
691 void set_jlong(jlong l) { _value.l = l;}
692 void set_jobject(jobject h) { _value.h = h;}
693 void set_type(BasicType t) { _type = t; }
694
695 jboolean get_jboolean() const { return (jboolean) (_value.i);}
696 jbyte get_jbyte() const { return (jbyte) (_value.i);}
697 jchar get_jchar() const { return (jchar) (_value.i);}
698 jshort get_jshort() const { return (jshort) (_value.i);}
699
700 };
701
702
703 #define STACK_BIAS 0
704 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff
705 // in order to extend the reach of the stack pointer.
706 #if defined(SPARC) && defined(_LP64)
707 #undef STACK_BIAS
708 #define STACK_BIAS 0x7ff
709 #endif
710
711
712 // TosState describes the top-of-stack state before and after the execution of
713 // a bytecode or method. The top-of-stack value may be cached in one or more CPU
714 // registers. The TosState corresponds to the 'machine represention' of this cached
715 // value. There's 4 states corresponding to the JAVA types int, long, float & double
716 // as well as a 5th state in case the top-of-stack value is actually on the top
717 // of stack (in memory) and thus not cached. The atos state corresponds to the itos
718 // state when it comes to machine representation but is used separately for (oop)
719 // type specific operations (e.g. verification code).
720
721 enum TosState { // describes the tos cache contents
722 btos = 0, // byte, bool tos cached
723 ctos = 1, // char tos cached
724 stos = 2, // short tos cached
725 itos = 3, // int tos cached
726 ltos = 4, // long tos cached
727 ftos = 5, // float tos cached
728 dtos = 6, // double tos cached
729 atos = 7, // object cached
730 vtos = 8, // tos not cached
731 number_of_states,
732 ilgl // illegal state: should not occur
733 };
734
735
736 inline TosState as_TosState(BasicType type) {
737 switch (type) {
738 case T_BYTE : return btos;
739 case T_BOOLEAN: return btos; // FIXME: Add ztos
740 case T_CHAR : return ctos;
741 case T_SHORT : return stos;
742 case T_INT : return itos;
743 case T_LONG : return ltos;
744 case T_FLOAT : return ftos;
745 case T_DOUBLE : return dtos;
746 case T_VOID : return vtos;
747 case T_ARRAY : // fall through
748 case T_OBJECT : return atos;
749 }
750 return ilgl;
751 }
752
753 inline BasicType as_BasicType(TosState state) {
754 switch (state) {
755 //case ztos: return T_BOOLEAN;//FIXME
756 case btos : return T_BYTE;
757 case ctos : return T_CHAR;
758 case stos : return T_SHORT;
759 case itos : return T_INT;
760 case ltos : return T_LONG;
761 case ftos : return T_FLOAT;
762 case dtos : return T_DOUBLE;
763 case atos : return T_OBJECT;
764 case vtos : return T_VOID;
765 }
766 return T_ILLEGAL;
767 }
768
769
770 // Helper function to convert BasicType info into TosState
771 // Note: Cannot define here as it uses global constant at the time being.
772 TosState as_TosState(BasicType type);
773
774
775 // JavaThreadState keeps track of which part of the code a thread is executing in. This
776 // information is needed by the safepoint code.
777 //
778 // There are 4 essential states:
779 //
780 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code)
781 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles
782 // _thread_in_vm : Executing in the vm
783 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub)
784 //
785 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in
786 // a transition from one state to another. These extra states makes it possible for the safepoint code to
787 // handle certain thread_states without having to suspend the thread - making the safepoint code faster.
788 //
789 // Given a state, the xxx_trans state can always be found by adding 1.
790 //
791 enum JavaThreadState {
792 _thread_uninitialized = 0, // should never happen (missing initialization)
793 _thread_new = 2, // just starting up, i.e., in process of being initialized
794 _thread_new_trans = 3, // corresponding transition state (not used, included for completness)
795 _thread_in_native = 4, // running in native code
796 _thread_in_native_trans = 5, // corresponding transition state
797 _thread_in_vm = 6, // running in VM
798 _thread_in_vm_trans = 7, // corresponding transition state
799 _thread_in_Java = 8, // running in Java or in stub code
800 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness)
801 _thread_blocked = 10, // blocked in vm
802 _thread_blocked_trans = 11, // corresponding transition state
803 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation
804 };
805
806
807 // Handy constants for deciding which compiler mode to use.
808 enum MethodCompilation {
809 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation
810 InvalidOSREntryBci = -2
811 };
812
813 // Enumeration to distinguish tiers of compilation
814 enum CompLevel {
815 CompLevel_any = -1,
816 CompLevel_all = -1,
817 CompLevel_none = 0, // Interpreter
818 CompLevel_simple = 1, // C1
819 CompLevel_limited_profile = 2, // C1, invocation & backedge counters
820 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo
821 CompLevel_full_optimization = 4, // C2 or Shark
822
823 #if defined(COMPILER2) || defined(SHARK)
824 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered
825 #elif defined(COMPILER1)
826 CompLevel_highest_tier = CompLevel_simple, // pure C1
827 #else
828 CompLevel_highest_tier = CompLevel_none,
829 #endif
830
831 #if defined(TIERED)
832 CompLevel_initial_compile = CompLevel_full_profile // tiered
833 #elif defined(COMPILER1)
834 CompLevel_initial_compile = CompLevel_simple // pure C1
835 #elif defined(COMPILER2) || defined(SHARK)
836 CompLevel_initial_compile = CompLevel_full_optimization // pure C2
837 #else
838 CompLevel_initial_compile = CompLevel_none
839 #endif
840 };
841
842 inline bool is_c1_compile(int comp_level) {
843 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization;
844 }
845
846 inline bool is_c2_compile(int comp_level) {
847 return comp_level == CompLevel_full_optimization;
848 }
849
850 inline bool is_highest_tier_compile(int comp_level) {
851 return comp_level == CompLevel_highest_tier;
852 }
853
854 inline bool is_compile(int comp_level) {
855 return is_c1_compile(comp_level) || is_c2_compile(comp_level);
856 }
857
858 //----------------------------------------------------------------------------------------------------
859 // 'Forward' declarations of frequently used classes
860 // (in order to reduce interface dependencies & reduce
861 // number of unnecessary compilations after changes)
862
863 class symbolTable;
864 class ClassFileStream;
865
866 class Event;
867
868 class Thread;
869 class VMThread;
870 class JavaThread;
871 class Threads;
872
873 class VM_Operation;
874 class VMOperationQueue;
875
876 class CodeBlob;
877 class nmethod;
878 class OSRAdapter;
879 class I2CAdapter;
880 class C2IAdapter;
881 class CompiledIC;
882 class relocInfo;
883 class ScopeDesc;
884 class PcDesc;
885
886 class Recompiler;
887 class Recompilee;
888 class RecompilationPolicy;
889 class RFrame;
890 class CompiledRFrame;
891 class InterpretedRFrame;
892
893 class frame;
894
895 class vframe;
896 class javaVFrame;
897 class interpretedVFrame;
898 class compiledVFrame;
899 class deoptimizedVFrame;
900 class externalVFrame;
901 class entryVFrame;
902
903 class RegisterMap;
904
905 class Mutex;
906 class Monitor;
907 class BasicLock;
908 class BasicObjectLock;
909
910 class PeriodicTask;
911
912 class JavaCallWrapper;
913
914 class oopDesc;
915 class metaDataOopDesc;
916
917 class NativeCall;
918
919 class zone;
920
921 class StubQueue;
922
923 class outputStream;
924
925 class ResourceArea;
926
927 class DebugInformationRecorder;
928 class ScopeValue;
929 class CompressedStream;
930 class DebugInfoReadStream;
931 class DebugInfoWriteStream;
932 class LocationValue;
933 class ConstantValue;
934 class IllegalValue;
935
936 class PrivilegedElement;
937 class MonitorArray;
938
939 class MonitorInfo;
940
941 class OffsetClosure;
942 class OopMapCache;
943 class InterpreterOopMap;
944 class OopMapCacheEntry;
945 class OSThread;
946
947 typedef int (*OSThreadStartFunc)(void*);
948
949 class Space;
950
951 class JavaValue;
952 class methodHandle;
953 class JavaCallArguments;
954
955 // Basic support for errors (general debug facilities not defined at this point fo the include phase)
956
957 extern void basic_fatal(const char* msg);
958
959
960 //----------------------------------------------------------------------------------------------------
961 // Special constants for debugging
962
963 const jint badInt = -3; // generic "bad int" value
964 const long badAddressVal = -2; // generic "bad address" value
965 const long badOopVal = -1; // generic "bad oop" value
966 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC
967 const int badHandleValue = 0xBC; // value used to zap vm handle area
968 const int badResourceValue = 0xAB; // value used to zap resource area
969 const int freeBlockPad = 0xBA; // value used to pad freed blocks.
970 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks.
971 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area
972 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC
973 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC
974 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation
975 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation
976
977
978 // (These must be implemented as #defines because C++ compilers are
979 // not obligated to inline non-integral constants!)
980 #define badAddress ((address)::badAddressVal)
981 #define badOop (cast_to_oop(::badOopVal))
982 #define badHeapWord (::badHeapWordVal)
983 #define badJNIHandle (cast_to_oop(::badJNIHandleVal))
984
985 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit)
986 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17))
987
988 //----------------------------------------------------------------------------------------------------
989 // Utility functions for bitfield manipulations
990
991 const intptr_t AllBits = ~0; // all bits set in a word
992 const intptr_t NoBits = 0; // no bits set in a word
993 const jlong NoLongBits = 0; // no bits set in a long
994 const intptr_t OneBit = 1; // only right_most bit set in a word
995
996 // get a word with the n.th or the right-most or left-most n bits set
997 // (note: #define used only so that they can be used in enum constant definitions)
998 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n))
999 #define right_n_bits(n) (nth_bit(n) - 1)
1000 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n)))
1001
1002 // bit-operations using a mask m
1003 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; }
1004 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; }
1005 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; }
1006 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; }
1007 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; }
1008
1009 // bit-operations using the n.th bit
1010 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); }
1011 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); }
1012 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; }
1013
1014 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!)
1015 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) {
1016 return mask_bits(x >> start_bit_no, right_n_bits(field_length));
1017 }
1018
1019
1020 //----------------------------------------------------------------------------------------------------
1021 // Utility functions for integers
1022
1023 // Avoid use of global min/max macros which may cause unwanted double
1024 // evaluation of arguments.
1025 #ifdef max
1026 #undef max
1027 #endif
1028
1029 #ifdef min
1030 #undef min
1031 #endif
1032
1033 #define max(a,b) Do_not_use_max_use_MAX2_instead
1034 #define min(a,b) Do_not_use_min_use_MIN2_instead
1035
1036 // It is necessary to use templates here. Having normal overloaded
1037 // functions does not work because it is necessary to provide both 32-
1038 // and 64-bit overloaded functions, which does not work, and having
1039 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L)
1040 // will be even more error-prone than macros.
1041 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; }
1042 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; }
1043 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); }
1044 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); }
1045 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); }
1046 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); }
1047
1048 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; }
1049
1050 // true if x is a power of 2, false otherwise
1051 inline bool is_power_of_2(intptr_t x) {
1052 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits));
1053 }
1054
1055 // long version of is_power_of_2
1056 inline bool is_power_of_2_long(jlong x) {
1057 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits));
1058 }
1059
1060 //* largest i such that 2^i <= x
1061 // A negative value of 'x' will return '31'
1062 inline int log2_intptr(intptr_t x) {
1063 int i = -1;
1064 uintptr_t p = 1;
1065 while (p != 0 && p <= (uintptr_t)x) {
1066 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1067 i++; p *= 2;
1068 }
1069 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1070 // (if p = 0 then overflow occurred and i = 31)
1071 return i;
1072 }
1073
1074 //* largest i such that 2^i <= x
1075 // A negative value of 'x' will return '63'
1076 inline int log2_long(jlong x) {
1077 int i = -1;
1078 julong p = 1;
1079 while (p != 0 && p <= (julong)x) {
1080 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1081 i++; p *= 2;
1082 }
1083 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1084 // (if p = 0 then overflow occurred and i = 63)
1085 return i;
1086 }
1087
1088 //* the argument must be exactly a power of 2
1089 inline int exact_log2(intptr_t x) {
1090 #ifdef ASSERT
1091 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2");
1092 #endif
1093 return log2_intptr(x);
1094 }
1095
1096 //* the argument must be exactly a power of 2
1097 inline int exact_log2_long(jlong x) {
1098 #ifdef ASSERT
1099 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2");
1100 #endif
1101 return log2_long(x);
1102 }
1103
1104
1105 // returns integer round-up to the nearest multiple of s (s must be a power of two)
1106 inline intptr_t round_to(intptr_t x, uintx s) {
1107 #ifdef ASSERT
1108 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1109 #endif
1110 const uintx m = s - 1;
1111 return mask_bits(x + m, ~m);
1112 }
1113
1114 // returns integer round-down to the nearest multiple of s (s must be a power of two)
1115 inline intptr_t round_down(intptr_t x, uintx s) {
1116 #ifdef ASSERT
1117 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1118 #endif
1119 const uintx m = s - 1;
1120 return mask_bits(x, ~m);
1121 }
1122
1123
1124 inline bool is_odd (intx x) { return x & 1; }
1125 inline bool is_even(intx x) { return !is_odd(x); }
1126
1127 // "to" should be greater than "from."
1128 inline intx byte_size(void* from, void* to) {
1129 return (address)to - (address)from;
1130 }
1131
1132 //----------------------------------------------------------------------------------------------------
1133 // Avoid non-portable casts with these routines (DEPRECATED)
1134
1135 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE
1136 // Bytes is optimized machine-specifically and may be much faster then the portable routines below.
1137
1138 // Given sequence of four bytes, build into a 32-bit word
1139 // following the conventions used in class files.
1140 // On the 386, this could be realized with a simple address cast.
1141 //
1142
1143 // This routine takes eight bytes:
1144 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1145 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 ))
1146 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 ))
1147 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 ))
1148 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 ))
1149 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 ))
1150 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 ))
1151 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 ))
1152 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 ));
1153 }
1154
1155 // This routine takes four bytes:
1156 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1157 return (( u4(c1) << 24 ) & 0xff000000)
1158 | (( u4(c2) << 16 ) & 0x00ff0000)
1159 | (( u4(c3) << 8 ) & 0x0000ff00)
1160 | (( u4(c4) << 0 ) & 0x000000ff);
1161 }
1162
1163 // And this one works if the four bytes are contiguous in memory:
1164 inline u4 build_u4_from( u1* p ) {
1165 return build_u4_from( p[0], p[1], p[2], p[3] );
1166 }
1167
1168 // Ditto for two-byte ints:
1169 inline u2 build_u2_from( u1 c1, u1 c2 ) {
1170 return u2((( u2(c1) << 8 ) & 0xff00)
1171 | (( u2(c2) << 0 ) & 0x00ff));
1172 }
1173
1174 // And this one works if the two bytes are contiguous in memory:
1175 inline u2 build_u2_from( u1* p ) {
1176 return build_u2_from( p[0], p[1] );
1177 }
1178
1179 // Ditto for floats:
1180 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1181 u4 u = build_u4_from( c1, c2, c3, c4 );
1182 return *(jfloat*)&u;
1183 }
1184
1185 inline jfloat build_float_from( u1* p ) {
1186 u4 u = build_u4_from( p );
1187 return *(jfloat*)&u;
1188 }
1189
1190
1191 // now (64-bit) longs
1192
1193 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1194 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 ))
1195 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 ))
1196 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 ))
1197 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 ))
1198 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 ))
1199 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 ))
1200 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 ))
1201 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 ));
1202 }
1203
1204 inline jlong build_long_from( u1* p ) {
1205 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] );
1206 }
1207
1208
1209 // Doubles, too!
1210 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1211 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 );
1212 return *(jdouble*)&u;
1213 }
1214
1215 inline jdouble build_double_from( u1* p ) {
1216 jlong u = build_long_from( p );
1217 return *(jdouble*)&u;
1218 }
1219
1220
1221 // Portable routines to go the other way:
1222
1223 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) {
1224 c1 = u1(x >> 8);
1225 c2 = u1(x);
1226 }
1227
1228 inline void explode_short_to( u2 x, u1* p ) {
1229 explode_short_to( x, p[0], p[1]);
1230 }
1231
1232 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) {
1233 c1 = u1(x >> 24);
1234 c2 = u1(x >> 16);
1235 c3 = u1(x >> 8);
1236 c4 = u1(x);
1237 }
1238
1239 inline void explode_int_to( u4 x, u1* p ) {
1240 explode_int_to( x, p[0], p[1], p[2], p[3]);
1241 }
1242
1243
1244 // Pack and extract shorts to/from ints:
1245
1246 inline int extract_low_short_from_int(jint x) {
1247 return x & 0xffff;
1248 }
1249
1250 inline int extract_high_short_from_int(jint x) {
1251 return (x >> 16) & 0xffff;
1252 }
1253
1254 inline int build_int_from_shorts( jushort low, jushort high ) {
1255 return ((int)((unsigned int)high << 16) | (unsigned int)low);
1256 }
1257
1258 // Printf-style formatters for fixed- and variable-width types as pointers and
1259 // integers. These are derived from the definitions in inttypes.h. If the platform
1260 // doesn't provide appropriate definitions, they should be provided in
1261 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp)
1262
1263 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false")
1264
1265 // Format 32-bit quantities.
1266 #define INT32_FORMAT "%" PRId32
1267 #define UINT32_FORMAT "%" PRIu32
1268 #define INT32_FORMAT_W(width) "%" #width PRId32
1269 #define UINT32_FORMAT_W(width) "%" #width PRIu32
1270
1271 #define PTR32_FORMAT "0x%08" PRIx32
1272
1273 // Format 64-bit quantities.
1274 #define INT64_FORMAT "%" PRId64
1275 #define UINT64_FORMAT "%" PRIu64
1276 #define INT64_FORMAT_W(width) "%" #width PRId64
1277 #define UINT64_FORMAT_W(width) "%" #width PRIu64
1278
1279 #define PTR64_FORMAT "0x%016" PRIx64
1280
1281 // Format jlong, if necessary
1282 #ifndef JLONG_FORMAT
1283 #define JLONG_FORMAT INT64_FORMAT
1284 #endif
1285 #ifndef JULONG_FORMAT
1286 #define JULONG_FORMAT UINT64_FORMAT
1287 #endif
1288
1289 // Format pointers which change size between 32- and 64-bit.
1290 #ifdef _LP64
1291 #define INTPTR_FORMAT "0x%016" PRIxPTR
1292 #define PTR_FORMAT "0x%016" PRIxPTR
1293 #else // !_LP64
1294 #define INTPTR_FORMAT "0x%08" PRIxPTR
1295 #define PTR_FORMAT "0x%08" PRIxPTR
1296 #endif // _LP64
1297
1298 #define SSIZE_FORMAT "%" PRIdPTR
1299 #define SIZE_FORMAT "%" PRIuPTR
1300 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR
1301 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR
1302
1303 #define INTX_FORMAT "%" PRIdPTR
1304 #define UINTX_FORMAT "%" PRIuPTR
1305 #define INTX_FORMAT_W(width) "%" #width PRIdPTR
1306 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR
1307
1308
1309 // Enable zap-a-lot if in debug version.
1310
1311 # ifdef ASSERT
1312 # ifdef COMPILER2
1313 # define ENABLE_ZAP_DEAD_LOCALS
1314 #endif /* COMPILER2 */
1315 # endif /* ASSERT */
1316
1317 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0]))
1318
1319 // Dereference vptr
1320 // All C++ compilers that we know of have the vtbl pointer in the first
1321 // word. If there are exceptions, this function needs to be made compiler
1322 // specific.
1323 static inline void* dereference_vptr(void* addr) {
1324 return *(void**)addr;
1325 }
1326
1327
1328 #ifndef PRODUCT
1329
1330 // For unit testing only
1331 class GlobalDefinitions {
1332 public:
1333 static void test_globals();
1334 };
1335
1336 #endif // PRODUCT
1337
1338 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP