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
330 //----------------------------------------------------------------------------------------------------
331 // Default and minimum StringTableSize values
332
333 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013);
334 const int minimumStringTableSize=1009;
335
336
337 //----------------------------------------------------------------------------------------------------
338 // HotSwap - for JVMTI aka Class File Replacement and PopFrame
339 //
340 // Determines whether on-the-fly class replacement and frame popping are enabled.
341
342 #define HOTSWAP
343
344 //----------------------------------------------------------------------------------------------------
345 // Object alignment, in units of HeapWords.
346 //
347 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and
348 // reference fields can be naturally aligned.
349
350 extern int MinObjAlignment;
351 extern int MinObjAlignmentInBytes;
352 extern int MinObjAlignmentInBytesMask;
353
354 extern int LogMinObjAlignment;
355 extern int LogMinObjAlignmentInBytes;
356
357 const int LogKlassAlignmentInBytes = 3;
358 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize;
359 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes;
360 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize;
361
362 // Klass encoding metaspace max size
363 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes;
364
365 const jlong CompressedKlassPointersBase = NOT_LP64(0) LP64_ONLY(CONST64(0x800000000)); // 32*G
366
367 // Machine dependent stuff
368
369 #ifdef TARGET_ARCH_x86
370 # include "globalDefinitions_x86.hpp"
371 #endif
372 #ifdef TARGET_ARCH_sparc
373 # include "globalDefinitions_sparc.hpp"
374 #endif
375 #ifdef TARGET_ARCH_zero
376 # include "globalDefinitions_zero.hpp"
377 #endif
378 #ifdef TARGET_ARCH_arm
379 # include "globalDefinitions_arm.hpp"
380 #endif
381 #ifdef TARGET_ARCH_ppc
382 # include "globalDefinitions_ppc.hpp"
383 #endif
384
385 /*
386 * If a platform does not support native stack walking
387 * the platform specific globalDefinitions (above)
388 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0
389 */
390 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
391 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1
392 #endif
393
394 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348.
395 // Note: this value must be a power of 2
396
397 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord)
398
399 // Signed variants of alignment helpers. There are two versions of each, a macro
400 // for use in places like enum definitions that require compile-time constant
401 // expressions and a function for all other places so as to get type checking.
402
403 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1))
404
405 inline bool is_size_aligned(size_t size, size_t alignment) {
406 return align_size_up_(size, alignment) == size;
407 }
408
409 inline bool is_ptr_aligned(void* ptr, size_t alignment) {
410 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr;
411 }
412
413 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) {
414 return align_size_up_(size, alignment);
415 }
416
417 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1))
418
419 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) {
420 return align_size_down_(size, alignment);
421 }
422
423 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment)))
424
425 inline void* align_ptr_up(void* ptr, size_t alignment) {
426 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment);
427 }
428
429 inline void* align_ptr_down(void* ptr, size_t alignment) {
430 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment);
431 }
432
433 // Align objects by rounding up their size, in HeapWord units.
434
435 #define align_object_size_(size) align_size_up_(size, MinObjAlignment)
436
437 inline intptr_t align_object_size(intptr_t size) {
438 return align_size_up(size, MinObjAlignment);
439 }
440
441 inline bool is_object_aligned(intptr_t addr) {
442 return addr == align_object_size(addr);
443 }
444
445 // Pad out certain offsets to jlong alignment, in HeapWord units.
446
447 inline intptr_t align_object_offset(intptr_t offset) {
448 return align_size_up(offset, HeapWordsPerLong);
449 }
450
451 inline void* align_pointer_up(const void* addr, size_t size) {
452 return (void*) align_size_up_((uintptr_t)addr, size);
453 }
454
455 // Clamp an address to be within a specific page
456 // 1. If addr is on the page it is returned as is
457 // 2. If addr is above the page_address the start of the *next* page will be returned
458 // 3. Otherwise, if addr is below the page_address the start of the page will be returned
459 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) {
460 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) {
461 // address is in the specified page, just return it as is
462 return addr;
463 } else if (addr > page_address) {
464 // address is above specified page, return start of next page
465 return (address)align_size_down(intptr_t(page_address), page_size) + page_size;
466 } else {
467 // address is below specified page, return start of page
468 return (address)align_size_down(intptr_t(page_address), page_size);
469 }
470 }
471
472
473 // The expected size in bytes of a cache line, used to pad data structures.
474 #define DEFAULT_CACHE_LINE_SIZE 64
475
476
477 //----------------------------------------------------------------------------------------------------
478 // Utility macros for compilers
479 // used to silence compiler warnings
480
481 #define Unused_Variable(var) var
482
483
484 //----------------------------------------------------------------------------------------------------
485 // Miscellaneous
486
487 // 6302670 Eliminate Hotspot __fabsf dependency
488 // All fabs() callers should call this function instead, which will implicitly
489 // convert the operand to double, avoiding a dependency on __fabsf which
490 // doesn't exist in early versions of Solaris 8.
491 inline double fabsd(double value) {
492 return fabs(value);
493 }
494
495 inline jint low (jlong value) { return jint(value); }
496 inline jint high(jlong value) { return jint(value >> 32); }
497
498 // the fancy casts are a hopefully portable way
499 // to do unsigned 32 to 64 bit type conversion
500 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32;
501 *value |= (jlong)(julong)(juint)low; }
502
503 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff;
504 *value |= (jlong)high << 32; }
505
506 inline jlong jlong_from(jint h, jint l) {
507 jlong result = 0; // initialization to avoid warning
508 set_high(&result, h);
509 set_low(&result, l);
510 return result;
511 }
512
513 union jlong_accessor {
514 jint words[2];
515 jlong long_value;
516 };
517
518 void basic_types_init(); // cannot define here; uses assert
519
520
521 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
522 enum BasicType {
523 T_BOOLEAN = 4,
524 T_CHAR = 5,
525 T_FLOAT = 6,
526 T_DOUBLE = 7,
527 T_BYTE = 8,
528 T_SHORT = 9,
529 T_INT = 10,
530 T_LONG = 11,
531 T_OBJECT = 12,
532 T_ARRAY = 13,
533 T_VOID = 14,
534 T_ADDRESS = 15,
535 T_NARROWOOP = 16,
536 T_METADATA = 17,
537 T_NARROWKLASS = 18,
538 T_CONFLICT = 19, // for stack value type with conflicting contents
539 T_ILLEGAL = 99
540 };
541
542 inline bool is_java_primitive(BasicType t) {
543 return T_BOOLEAN <= t && t <= T_LONG;
544 }
545
546 inline bool is_subword_type(BasicType t) {
547 // these guys are processed exactly like T_INT in calling sequences:
548 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT);
549 }
550
551 inline bool is_signed_subword_type(BasicType t) {
552 return (t == T_BYTE || t == T_SHORT);
553 }
554
555 // Convert a char from a classfile signature to a BasicType
556 inline BasicType char2type(char c) {
557 switch( c ) {
558 case 'B': return T_BYTE;
559 case 'C': return T_CHAR;
560 case 'D': return T_DOUBLE;
561 case 'F': return T_FLOAT;
562 case 'I': return T_INT;
563 case 'J': return T_LONG;
564 case 'S': return T_SHORT;
565 case 'Z': return T_BOOLEAN;
566 case 'V': return T_VOID;
567 case 'L': return T_OBJECT;
568 case '[': return T_ARRAY;
569 }
570 return T_ILLEGAL;
571 }
572
573 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
574 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; }
575 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements
576 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
577 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; }
578 extern BasicType name2type(const char* name);
579
580 // Auxilary math routines
581 // least common multiple
582 extern size_t lcm(size_t a, size_t b);
583
584
585 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
586 enum BasicTypeSize {
587 T_BOOLEAN_size = 1,
588 T_CHAR_size = 1,
589 T_FLOAT_size = 1,
590 T_DOUBLE_size = 2,
591 T_BYTE_size = 1,
592 T_SHORT_size = 1,
593 T_INT_size = 1,
594 T_LONG_size = 2,
595 T_OBJECT_size = 1,
596 T_ARRAY_size = 1,
597 T_NARROWOOP_size = 1,
598 T_NARROWKLASS_size = 1,
599 T_VOID_size = 0
600 };
601
602
603 // maps a BasicType to its instance field storage type:
604 // all sub-word integral types are widened to T_INT
605 extern BasicType type2field[T_CONFLICT+1];
606 extern BasicType type2wfield[T_CONFLICT+1];
607
608
609 // size in bytes
610 enum ArrayElementSize {
611 T_BOOLEAN_aelem_bytes = 1,
612 T_CHAR_aelem_bytes = 2,
613 T_FLOAT_aelem_bytes = 4,
614 T_DOUBLE_aelem_bytes = 8,
615 T_BYTE_aelem_bytes = 1,
616 T_SHORT_aelem_bytes = 2,
617 T_INT_aelem_bytes = 4,
618 T_LONG_aelem_bytes = 8,
619 #ifdef _LP64
620 T_OBJECT_aelem_bytes = 8,
621 T_ARRAY_aelem_bytes = 8,
622 #else
623 T_OBJECT_aelem_bytes = 4,
624 T_ARRAY_aelem_bytes = 4,
625 #endif
626 T_NARROWOOP_aelem_bytes = 4,
627 T_NARROWKLASS_aelem_bytes = 4,
628 T_VOID_aelem_bytes = 0
629 };
630
631 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element
632 #ifdef ASSERT
633 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts
634 #else
635 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; }
636 #endif
637
638
639 // JavaValue serves as a container for arbitrary Java values.
640
641 class JavaValue {
642
643 public:
644 typedef union JavaCallValue {
645 jfloat f;
646 jdouble d;
647 jint i;
648 jlong l;
649 jobject h;
650 } JavaCallValue;
651
652 private:
653 BasicType _type;
654 JavaCallValue _value;
655
656 public:
657 JavaValue(BasicType t = T_ILLEGAL) { _type = t; }
658
659 JavaValue(jfloat value) {
660 _type = T_FLOAT;
661 _value.f = value;
662 }
663
664 JavaValue(jdouble value) {
665 _type = T_DOUBLE;
666 _value.d = value;
667 }
668
669 jfloat get_jfloat() const { return _value.f; }
670 jdouble get_jdouble() const { return _value.d; }
671 jint get_jint() const { return _value.i; }
672 jlong get_jlong() const { return _value.l; }
673 jobject get_jobject() const { return _value.h; }
674 JavaCallValue* get_value_addr() { return &_value; }
675 BasicType get_type() const { return _type; }
676
677 void set_jfloat(jfloat f) { _value.f = f;}
678 void set_jdouble(jdouble d) { _value.d = d;}
679 void set_jint(jint i) { _value.i = i;}
680 void set_jlong(jlong l) { _value.l = l;}
681 void set_jobject(jobject h) { _value.h = h;}
682 void set_type(BasicType t) { _type = t; }
683
684 jboolean get_jboolean() const { return (jboolean) (_value.i);}
685 jbyte get_jbyte() const { return (jbyte) (_value.i);}
686 jchar get_jchar() const { return (jchar) (_value.i);}
687 jshort get_jshort() const { return (jshort) (_value.i);}
688
689 };
690
691
692 #define STACK_BIAS 0
693 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff
694 // in order to extend the reach of the stack pointer.
695 #if defined(SPARC) && defined(_LP64)
696 #undef STACK_BIAS
697 #define STACK_BIAS 0x7ff
698 #endif
699
700
701 // TosState describes the top-of-stack state before and after the execution of
702 // a bytecode or method. The top-of-stack value may be cached in one or more CPU
703 // registers. The TosState corresponds to the 'machine represention' of this cached
704 // value. There's 4 states corresponding to the JAVA types int, long, float & double
705 // as well as a 5th state in case the top-of-stack value is actually on the top
706 // of stack (in memory) and thus not cached. The atos state corresponds to the itos
707 // state when it comes to machine representation but is used separately for (oop)
708 // type specific operations (e.g. verification code).
709
710 enum TosState { // describes the tos cache contents
711 btos = 0, // byte, bool tos cached
712 ctos = 1, // char tos cached
713 stos = 2, // short tos cached
714 itos = 3, // int tos cached
715 ltos = 4, // long tos cached
716 ftos = 5, // float tos cached
717 dtos = 6, // double tos cached
718 atos = 7, // object cached
719 vtos = 8, // tos not cached
720 number_of_states,
721 ilgl // illegal state: should not occur
722 };
723
724
725 inline TosState as_TosState(BasicType type) {
726 switch (type) {
727 case T_BYTE : return btos;
728 case T_BOOLEAN: return btos; // FIXME: Add ztos
729 case T_CHAR : return ctos;
730 case T_SHORT : return stos;
731 case T_INT : return itos;
732 case T_LONG : return ltos;
733 case T_FLOAT : return ftos;
734 case T_DOUBLE : return dtos;
735 case T_VOID : return vtos;
736 case T_ARRAY : // fall through
737 case T_OBJECT : return atos;
738 }
739 return ilgl;
740 }
741
742 inline BasicType as_BasicType(TosState state) {
743 switch (state) {
744 //case ztos: return T_BOOLEAN;//FIXME
745 case btos : return T_BYTE;
746 case ctos : return T_CHAR;
747 case stos : return T_SHORT;
748 case itos : return T_INT;
749 case ltos : return T_LONG;
750 case ftos : return T_FLOAT;
751 case dtos : return T_DOUBLE;
752 case atos : return T_OBJECT;
753 case vtos : return T_VOID;
754 }
755 return T_ILLEGAL;
756 }
757
758
759 // Helper function to convert BasicType info into TosState
760 // Note: Cannot define here as it uses global constant at the time being.
761 TosState as_TosState(BasicType type);
762
763
764 // JavaThreadState keeps track of which part of the code a thread is executing in. This
765 // information is needed by the safepoint code.
766 //
767 // There are 4 essential states:
768 //
769 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code)
770 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles
771 // _thread_in_vm : Executing in the vm
772 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub)
773 //
774 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in
775 // a transition from one state to another. These extra states makes it possible for the safepoint code to
776 // handle certain thread_states without having to suspend the thread - making the safepoint code faster.
777 //
778 // Given a state, the xxx_trans state can always be found by adding 1.
779 //
780 enum JavaThreadState {
781 _thread_uninitialized = 0, // should never happen (missing initialization)
782 _thread_new = 2, // just starting up, i.e., in process of being initialized
783 _thread_new_trans = 3, // corresponding transition state (not used, included for completness)
784 _thread_in_native = 4, // running in native code
785 _thread_in_native_trans = 5, // corresponding transition state
786 _thread_in_vm = 6, // running in VM
787 _thread_in_vm_trans = 7, // corresponding transition state
788 _thread_in_Java = 8, // running in Java or in stub code
789 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness)
790 _thread_blocked = 10, // blocked in vm
791 _thread_blocked_trans = 11, // corresponding transition state
792 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation
793 };
794
795
796 // Handy constants for deciding which compiler mode to use.
797 enum MethodCompilation {
798 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation
799 InvalidOSREntryBci = -2
800 };
801
802 // Enumeration to distinguish tiers of compilation
803 enum CompLevel {
804 CompLevel_any = -1,
805 CompLevel_all = -1,
806 CompLevel_none = 0, // Interpreter
807 CompLevel_simple = 1, // C1
808 CompLevel_limited_profile = 2, // C1, invocation & backedge counters
809 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo
810 CompLevel_full_optimization = 4, // C2 or Shark
811
812 #if defined(COMPILER2) || defined(SHARK)
813 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered
814 #elif defined(COMPILER1)
815 CompLevel_highest_tier = CompLevel_simple, // pure C1
816 #else
817 CompLevel_highest_tier = CompLevel_none,
818 #endif
819
820 #if defined(TIERED)
821 CompLevel_initial_compile = CompLevel_full_profile // tiered
822 #elif defined(COMPILER1)
823 CompLevel_initial_compile = CompLevel_simple // pure C1
824 #elif defined(COMPILER2) || defined(SHARK)
825 CompLevel_initial_compile = CompLevel_full_optimization // pure C2
826 #else
827 CompLevel_initial_compile = CompLevel_none
828 #endif
829 };
830
831 inline bool is_c1_compile(int comp_level) {
832 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization;
833 }
834
835 inline bool is_c2_compile(int comp_level) {
836 return comp_level == CompLevel_full_optimization;
837 }
838
839 inline bool is_highest_tier_compile(int comp_level) {
840 return comp_level == CompLevel_highest_tier;
841 }
842
843 inline bool is_compile(int comp_level) {
844 return is_c1_compile(comp_level) || is_c2_compile(comp_level);
845 }
846
847 //----------------------------------------------------------------------------------------------------
848 // 'Forward' declarations of frequently used classes
849 // (in order to reduce interface dependencies & reduce
850 // number of unnecessary compilations after changes)
851
852 class symbolTable;
853 class ClassFileStream;
854
855 class Event;
856
857 class Thread;
858 class VMThread;
859 class JavaThread;
860 class Threads;
861
862 class VM_Operation;
863 class VMOperationQueue;
864
865 class CodeBlob;
866 class nmethod;
867 class OSRAdapter;
868 class I2CAdapter;
869 class C2IAdapter;
870 class CompiledIC;
871 class relocInfo;
872 class ScopeDesc;
873 class PcDesc;
874
875 class Recompiler;
876 class Recompilee;
877 class RecompilationPolicy;
878 class RFrame;
879 class CompiledRFrame;
880 class InterpretedRFrame;
881
882 class frame;
883
884 class vframe;
885 class javaVFrame;
886 class interpretedVFrame;
887 class compiledVFrame;
888 class deoptimizedVFrame;
889 class externalVFrame;
890 class entryVFrame;
891
892 class RegisterMap;
893
894 class Mutex;
895 class Monitor;
896 class BasicLock;
897 class BasicObjectLock;
898
899 class PeriodicTask;
900
901 class JavaCallWrapper;
902
903 class oopDesc;
904 class metaDataOopDesc;
905
906 class NativeCall;
907
908 class zone;
909
910 class StubQueue;
911
912 class outputStream;
913
914 class ResourceArea;
915
916 class DebugInformationRecorder;
917 class ScopeValue;
918 class CompressedStream;
919 class DebugInfoReadStream;
920 class DebugInfoWriteStream;
921 class LocationValue;
922 class ConstantValue;
923 class IllegalValue;
924
925 class PrivilegedElement;
926 class MonitorArray;
927
928 class MonitorInfo;
929
930 class OffsetClosure;
931 class OopMapCache;
932 class InterpreterOopMap;
933 class OopMapCacheEntry;
934 class OSThread;
935
936 typedef int (*OSThreadStartFunc)(void*);
937
938 class Space;
939
940 class JavaValue;
941 class methodHandle;
942 class JavaCallArguments;
943
944 // Basic support for errors (general debug facilities not defined at this point fo the include phase)
945
946 extern void basic_fatal(const char* msg);
947
948
949 //----------------------------------------------------------------------------------------------------
950 // Special constants for debugging
951
952 const jint badInt = -3; // generic "bad int" value
953 const long badAddressVal = -2; // generic "bad address" value
954 const long badOopVal = -1; // generic "bad oop" value
955 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC
956 const int badHandleValue = 0xBC; // value used to zap vm handle area
957 const int badResourceValue = 0xAB; // value used to zap resource area
958 const int freeBlockPad = 0xBA; // value used to pad freed blocks.
959 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks.
960 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area
961 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC
962 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC
963 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation
964 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation
965
966
967 // (These must be implemented as #defines because C++ compilers are
968 // not obligated to inline non-integral constants!)
969 #define badAddress ((address)::badAddressVal)
970 #define badOop ((oop)::badOopVal)
971 #define badHeapWord (::badHeapWordVal)
972 #define badJNIHandle ((oop)::badJNIHandleVal)
973
974 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit)
975 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17))
976
977 //----------------------------------------------------------------------------------------------------
978 // Utility functions for bitfield manipulations
979
980 const intptr_t AllBits = ~0; // all bits set in a word
981 const intptr_t NoBits = 0; // no bits set in a word
982 const jlong NoLongBits = 0; // no bits set in a long
983 const intptr_t OneBit = 1; // only right_most bit set in a word
984
985 // get a word with the n.th or the right-most or left-most n bits set
986 // (note: #define used only so that they can be used in enum constant definitions)
987 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n))
988 #define right_n_bits(n) (nth_bit(n) - 1)
989 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n)))
990
991 // bit-operations using a mask m
992 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; }
993 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; }
994 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; }
995 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; }
996 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; }
997
998 // bit-operations using the n.th bit
999 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); }
1000 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); }
1001 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; }
1002
1003 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!)
1004 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) {
1005 return mask_bits(x >> start_bit_no, right_n_bits(field_length));
1006 }
1007
1008
1009 //----------------------------------------------------------------------------------------------------
1010 // Utility functions for integers
1011
1012 // Avoid use of global min/max macros which may cause unwanted double
1013 // evaluation of arguments.
1014 #ifdef max
1015 #undef max
1016 #endif
1017
1018 #ifdef min
1019 #undef min
1020 #endif
1021
1022 #define max(a,b) Do_not_use_max_use_MAX2_instead
1023 #define min(a,b) Do_not_use_min_use_MIN2_instead
1024
1025 // It is necessary to use templates here. Having normal overloaded
1026 // functions does not work because it is necessary to provide both 32-
1027 // and 64-bit overloaded functions, which does not work, and having
1028 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L)
1029 // will be even more error-prone than macros.
1030 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; }
1031 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; }
1032 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); }
1033 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); }
1034 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); }
1035 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); }
1036
1037 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; }
1038
1039 // true if x is a power of 2, false otherwise
1040 inline bool is_power_of_2(intptr_t x) {
1041 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits));
1042 }
1043
1044 // long version of is_power_of_2
1045 inline bool is_power_of_2_long(jlong x) {
1046 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits));
1047 }
1048
1049 //* largest i such that 2^i <= x
1050 // A negative value of 'x' will return '31'
1051 inline int log2_intptr(intptr_t x) {
1052 int i = -1;
1053 uintptr_t p = 1;
1054 while (p != 0 && p <= (uintptr_t)x) {
1055 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1056 i++; p *= 2;
1057 }
1058 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1059 // (if p = 0 then overflow occurred and i = 31)
1060 return i;
1061 }
1062
1063 //* largest i such that 2^i <= x
1064 // A negative value of 'x' will return '63'
1065 inline int log2_long(jlong x) {
1066 int i = -1;
1067 julong p = 1;
1068 while (p != 0 && p <= (julong)x) {
1069 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1070 i++; p *= 2;
1071 }
1072 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1073 // (if p = 0 then overflow occurred and i = 63)
1074 return i;
1075 }
1076
1077 //* the argument must be exactly a power of 2
1078 inline int exact_log2(intptr_t x) {
1079 #ifdef ASSERT
1080 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2");
1081 #endif
1082 return log2_intptr(x);
1083 }
1084
1085 //* the argument must be exactly a power of 2
1086 inline int exact_log2_long(jlong x) {
1087 #ifdef ASSERT
1088 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2");
1089 #endif
1090 return log2_long(x);
1091 }
1092
1093
1094 // returns integer round-up to the nearest multiple of s (s must be a power of two)
1095 inline intptr_t round_to(intptr_t x, uintx s) {
1096 #ifdef ASSERT
1097 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1098 #endif
1099 const uintx m = s - 1;
1100 return mask_bits(x + m, ~m);
1101 }
1102
1103 // returns integer round-down to the nearest multiple of s (s must be a power of two)
1104 inline intptr_t round_down(intptr_t x, uintx s) {
1105 #ifdef ASSERT
1106 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1107 #endif
1108 const uintx m = s - 1;
1109 return mask_bits(x, ~m);
1110 }
1111
1112
1113 inline bool is_odd (intx x) { return x & 1; }
1114 inline bool is_even(intx x) { return !is_odd(x); }
1115
1116 // "to" should be greater than "from."
1117 inline intx byte_size(void* from, void* to) {
1118 return (address)to - (address)from;
1119 }
1120
1121 //----------------------------------------------------------------------------------------------------
1122 // Avoid non-portable casts with these routines (DEPRECATED)
1123
1124 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE
1125 // Bytes is optimized machine-specifically and may be much faster then the portable routines below.
1126
1127 // Given sequence of four bytes, build into a 32-bit word
1128 // following the conventions used in class files.
1129 // On the 386, this could be realized with a simple address cast.
1130 //
1131
1132 // This routine takes eight bytes:
1133 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1134 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 ))
1135 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 ))
1136 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 ))
1137 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 ))
1138 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 ))
1139 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 ))
1140 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 ))
1141 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 ));
1142 }
1143
1144 // This routine takes four bytes:
1145 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1146 return (( u4(c1) << 24 ) & 0xff000000)
1147 | (( u4(c2) << 16 ) & 0x00ff0000)
1148 | (( u4(c3) << 8 ) & 0x0000ff00)
1149 | (( u4(c4) << 0 ) & 0x000000ff);
1150 }
1151
1152 // And this one works if the four bytes are contiguous in memory:
1153 inline u4 build_u4_from( u1* p ) {
1154 return build_u4_from( p[0], p[1], p[2], p[3] );
1155 }
1156
1157 // Ditto for two-byte ints:
1158 inline u2 build_u2_from( u1 c1, u1 c2 ) {
1159 return u2((( u2(c1) << 8 ) & 0xff00)
1160 | (( u2(c2) << 0 ) & 0x00ff));
1161 }
1162
1163 // And this one works if the two bytes are contiguous in memory:
1164 inline u2 build_u2_from( u1* p ) {
1165 return build_u2_from( p[0], p[1] );
1166 }
1167
1168 // Ditto for floats:
1169 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1170 u4 u = build_u4_from( c1, c2, c3, c4 );
1171 return *(jfloat*)&u;
1172 }
1173
1174 inline jfloat build_float_from( u1* p ) {
1175 u4 u = build_u4_from( p );
1176 return *(jfloat*)&u;
1177 }
1178
1179
1180 // now (64-bit) longs
1181
1182 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1183 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 ))
1184 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 ))
1185 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 ))
1186 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 ))
1187 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 ))
1188 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 ))
1189 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 ))
1190 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 ));
1191 }
1192
1193 inline jlong build_long_from( u1* p ) {
1194 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] );
1195 }
1196
1197
1198 // Doubles, too!
1199 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1200 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 );
1201 return *(jdouble*)&u;
1202 }
1203
1204 inline jdouble build_double_from( u1* p ) {
1205 jlong u = build_long_from( p );
1206 return *(jdouble*)&u;
1207 }
1208
1209
1210 // Portable routines to go the other way:
1211
1212 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) {
1213 c1 = u1(x >> 8);
1214 c2 = u1(x);
1215 }
1216
1217 inline void explode_short_to( u2 x, u1* p ) {
1218 explode_short_to( x, p[0], p[1]);
1219 }
1220
1221 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) {
1222 c1 = u1(x >> 24);
1223 c2 = u1(x >> 16);
1224 c3 = u1(x >> 8);
1225 c4 = u1(x);
1226 }
1227
1228 inline void explode_int_to( u4 x, u1* p ) {
1229 explode_int_to( x, p[0], p[1], p[2], p[3]);
1230 }
1231
1232
1233 // Pack and extract shorts to/from ints:
1234
1235 inline int extract_low_short_from_int(jint x) {
1236 return x & 0xffff;
1237 }
1238
1239 inline int extract_high_short_from_int(jint x) {
1240 return (x >> 16) & 0xffff;
1241 }
1242
1243 inline int build_int_from_shorts( jushort low, jushort high ) {
1244 return ((int)((unsigned int)high << 16) | (unsigned int)low);
1245 }
1246
1247 // Printf-style formatters for fixed- and variable-width types as pointers and
1248 // integers. These are derived from the definitions in inttypes.h. If the platform
1249 // doesn't provide appropriate definitions, they should be provided in
1250 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp)
1251
1252 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false")
1253
1254 // Format 32-bit quantities.
1255 #define INT32_FORMAT "%" PRId32
1256 #define UINT32_FORMAT "%" PRIu32
1257 #define INT32_FORMAT_W(width) "%" #width PRId32
1258 #define UINT32_FORMAT_W(width) "%" #width PRIu32
1259
1260 #define PTR32_FORMAT "0x%08" PRIx32
1261
1262 // Format 64-bit quantities.
1263 #define INT64_FORMAT "%" PRId64
1264 #define UINT64_FORMAT "%" PRIu64
1265 #define INT64_FORMAT_W(width) "%" #width PRId64
1266 #define UINT64_FORMAT_W(width) "%" #width PRIu64
1267
1268 #define PTR64_FORMAT "0x%016" PRIx64
1269
1270 // Format jlong, if necessary
1271 #ifndef JLONG_FORMAT
1272 #define JLONG_FORMAT INT64_FORMAT
1273 #endif
1274 #ifndef JULONG_FORMAT
1275 #define JULONG_FORMAT UINT64_FORMAT
1276 #endif
1277
1278 // Format pointers which change size between 32- and 64-bit.
1279 #ifdef _LP64
1280 #define INTPTR_FORMAT "0x%016" PRIxPTR
1281 #define PTR_FORMAT "0x%016" PRIxPTR
1282 #else // !_LP64
1283 #define INTPTR_FORMAT "0x%08" PRIxPTR
1284 #define PTR_FORMAT "0x%08" PRIxPTR
1285 #endif // _LP64
1286
1287 #define SSIZE_FORMAT "%" PRIdPTR
1288 #define SIZE_FORMAT "%" PRIuPTR
1289 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR
1290 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR
1291
1292 #define INTX_FORMAT "%" PRIdPTR
1293 #define UINTX_FORMAT "%" PRIuPTR
1294 #define INTX_FORMAT_W(width) "%" #width PRIdPTR
1295 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR
1296
1297
1298 // Enable zap-a-lot if in debug version.
1299
1300 # ifdef ASSERT
1301 # ifdef COMPILER2
1302 # define ENABLE_ZAP_DEAD_LOCALS
1303 #endif /* COMPILER2 */
1304 # endif /* ASSERT */
1305
1306 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0]))
1307
1308 // Dereference vptr
1309 // All C++ compilers that we know of have the vtbl pointer in the first
1310 // word. If there are exceptions, this function needs to be made compiler
1311 // specific.
1312 static inline void* dereference_vptr(void* addr) {
1313 return *(void**)addr;
1314 }
1315
1316
1317 #ifndef PRODUCT
1318
1319 // For unit testing only
1320 class GlobalDefinitions {
1321 public:
1322 static void test_globals();
1323 };
1324
1325 #endif // PRODUCT
1326
1327 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP