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 // Machine dependent stuff
366
367 #ifdef TARGET_ARCH_x86
368 # include "globalDefinitions_x86.hpp"
369 #endif
370 #ifdef TARGET_ARCH_sparc
371 # include "globalDefinitions_sparc.hpp"
372 #endif
373 #ifdef TARGET_ARCH_zero
374 # include "globalDefinitions_zero.hpp"
375 #endif
376 #ifdef TARGET_ARCH_arm
377 # include "globalDefinitions_arm.hpp"
378 #endif
379 #ifdef TARGET_ARCH_ppc
380 # include "globalDefinitions_ppc.hpp"
381 #endif
382
383 /*
384 * If a platform does not support NMT_detail
385 * the platform specific globalDefinitions (above)
386 * can set PLATFORM_NMT_DETAIL_SUPPORTED to false
387 */
388 #ifndef PLATFORM_NMT_DETAIL_SUPPORTED
389 #define PLATFORM_NMT_DETAIL_SUPPORTED true
390 #endif
391
392 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348.
393 // Note: this value must be a power of 2
394
395 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord)
396
397 // Signed variants of alignment helpers. There are two versions of each, a macro
398 // for use in places like enum definitions that require compile-time constant
399 // expressions and a function for all other places so as to get type checking.
400
401 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1))
402
403 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) {
404 return align_size_up_(size, alignment);
405 }
406
407 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1))
408
409 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) {
410 return align_size_down_(size, alignment);
411 }
412
413 // Align objects by rounding up their size, in HeapWord units.
414
415 #define align_object_size_(size) align_size_up_(size, MinObjAlignment)
416
417 inline intptr_t align_object_size(intptr_t size) {
418 return align_size_up(size, MinObjAlignment);
419 }
420
421 inline bool is_object_aligned(intptr_t addr) {
422 return addr == align_object_size(addr);
423 }
424
425 // Pad out certain offsets to jlong alignment, in HeapWord units.
426
427 inline intptr_t align_object_offset(intptr_t offset) {
428 return align_size_up(offset, HeapWordsPerLong);
429 }
430
431 // Clamp an address to be within a specific page
432 // 1. If addr is on the page it is returned as is
433 // 2. If addr is above the page_address the start of the *next* page will be returned
434 // 3. Otherwise, if addr is below the page_address the start of the page will be returned
435 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) {
436 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) {
437 // address is in the specified page, just return it as is
438 return addr;
439 } else if (addr > page_address) {
440 // address is above specified page, return start of next page
441 return (address)align_size_down(intptr_t(page_address), page_size) + page_size;
442 } else {
443 // address is below specified page, return start of page
444 return (address)align_size_down(intptr_t(page_address), page_size);
445 }
446 }
447
448
449 // The expected size in bytes of a cache line, used to pad data structures.
450 #define DEFAULT_CACHE_LINE_SIZE 64
451
452 // Bytes needed to pad type to avoid cache-line sharing; alignment should be the
453 // expected cache line size (a power of two). The first addend avoids sharing
454 // when the start address is not a multiple of alignment; the second maintains
455 // alignment of starting addresses that happen to be a multiple.
456 #define PADDING_SIZE(type, alignment) \
457 ((alignment) + align_size_up_(sizeof(type), alignment))
458
459 // Templates to create a subclass padded to avoid cache line sharing. These are
460 // effective only when applied to derived-most (leaf) classes.
461
462 // When no args are passed to the base ctor.
463 template <class T, size_t alignment = DEFAULT_CACHE_LINE_SIZE>
464 class Padded: public T {
465 private:
466 char _pad_buf_[PADDING_SIZE(T, alignment)];
467 };
468
469 // When either 0 or 1 args may be passed to the base ctor.
470 template <class T, typename Arg1T, size_t alignment = DEFAULT_CACHE_LINE_SIZE>
471 class Padded01: public T {
472 public:
473 Padded01(): T() { }
474 Padded01(Arg1T arg1): T(arg1) { }
475 private:
476 char _pad_buf_[PADDING_SIZE(T, alignment)];
477 };
478
479 //----------------------------------------------------------------------------------------------------
480 // Utility macros for compilers
481 // used to silence compiler warnings
482
483 #define Unused_Variable(var) var
484
485
486 //----------------------------------------------------------------------------------------------------
487 // Miscellaneous
488
489 // 6302670 Eliminate Hotspot __fabsf dependency
490 // All fabs() callers should call this function instead, which will implicitly
491 // convert the operand to double, avoiding a dependency on __fabsf which
492 // doesn't exist in early versions of Solaris 8.
493 inline double fabsd(double value) {
494 return fabs(value);
495 }
496
497 inline jint low (jlong value) { return jint(value); }
498 inline jint high(jlong value) { return jint(value >> 32); }
499
500 // the fancy casts are a hopefully portable way
501 // to do unsigned 32 to 64 bit type conversion
502 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32;
503 *value |= (jlong)(julong)(juint)low; }
504
505 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff;
506 *value |= (jlong)high << 32; }
507
508 inline jlong jlong_from(jint h, jint l) {
509 jlong result = 0; // initialization to avoid warning
510 set_high(&result, h);
511 set_low(&result, l);
512 return result;
513 }
514
515 union jlong_accessor {
516 jint words[2];
517 jlong long_value;
518 };
519
520 void basic_types_init(); // cannot define here; uses assert
521
522
523 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
524 enum BasicType {
525 T_BOOLEAN = 4,
526 T_CHAR = 5,
527 T_FLOAT = 6,
528 T_DOUBLE = 7,
529 T_BYTE = 8,
530 T_SHORT = 9,
531 T_INT = 10,
532 T_LONG = 11,
533 T_OBJECT = 12,
534 T_ARRAY = 13,
535 T_VOID = 14,
536 T_ADDRESS = 15,
537 T_NARROWOOP = 16,
538 T_METADATA = 17,
539 T_NARROWKLASS = 18,
540 T_CONFLICT = 19, // for stack value type with conflicting contents
541 T_ILLEGAL = 99
542 };
543
544 inline bool is_java_primitive(BasicType t) {
545 return T_BOOLEAN <= t && t <= T_LONG;
546 }
547
548 inline bool is_subword_type(BasicType t) {
549 // these guys are processed exactly like T_INT in calling sequences:
550 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT);
551 }
552
553 inline bool is_signed_subword_type(BasicType t) {
554 return (t == T_BYTE || t == T_SHORT);
555 }
556
557 // Convert a char from a classfile signature to a BasicType
558 inline BasicType char2type(char c) {
559 switch( c ) {
560 case 'B': return T_BYTE;
561 case 'C': return T_CHAR;
562 case 'D': return T_DOUBLE;
563 case 'F': return T_FLOAT;
564 case 'I': return T_INT;
565 case 'J': return T_LONG;
566 case 'S': return T_SHORT;
567 case 'Z': return T_BOOLEAN;
568 case 'V': return T_VOID;
569 case 'L': return T_OBJECT;
570 case '[': return T_ARRAY;
571 }
572 return T_ILLEGAL;
573 }
574
575 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
576 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; }
577 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements
578 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
579 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; }
580 extern BasicType name2type(const char* name);
581
582 // Auxilary math routines
583 // least common multiple
584 extern size_t lcm(size_t a, size_t b);
585
586
587 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
588 enum BasicTypeSize {
589 T_BOOLEAN_size = 1,
590 T_CHAR_size = 1,
591 T_FLOAT_size = 1,
592 T_DOUBLE_size = 2,
593 T_BYTE_size = 1,
594 T_SHORT_size = 1,
595 T_INT_size = 1,
596 T_LONG_size = 2,
597 T_OBJECT_size = 1,
598 T_ARRAY_size = 1,
599 T_NARROWOOP_size = 1,
600 T_NARROWKLASS_size = 1,
601 T_VOID_size = 0
602 };
603
604
605 // maps a BasicType to its instance field storage type:
606 // all sub-word integral types are widened to T_INT
607 extern BasicType type2field[T_CONFLICT+1];
608 extern BasicType type2wfield[T_CONFLICT+1];
609
610
611 // size in bytes
612 enum ArrayElementSize {
613 T_BOOLEAN_aelem_bytes = 1,
614 T_CHAR_aelem_bytes = 2,
615 T_FLOAT_aelem_bytes = 4,
616 T_DOUBLE_aelem_bytes = 8,
617 T_BYTE_aelem_bytes = 1,
618 T_SHORT_aelem_bytes = 2,
619 T_INT_aelem_bytes = 4,
620 T_LONG_aelem_bytes = 8,
621 #ifdef _LP64
622 T_OBJECT_aelem_bytes = 8,
623 T_ARRAY_aelem_bytes = 8,
624 #else
625 T_OBJECT_aelem_bytes = 4,
626 T_ARRAY_aelem_bytes = 4,
627 #endif
628 T_NARROWOOP_aelem_bytes = 4,
629 T_NARROWKLASS_aelem_bytes = 4,
630 T_VOID_aelem_bytes = 0
631 };
632
633 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element
634 #ifdef ASSERT
635 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts
636 #else
637 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; }
638 #endif
639
640
641 // JavaValue serves as a container for arbitrary Java values.
642
643 class JavaValue {
644
645 public:
646 typedef union JavaCallValue {
647 jfloat f;
648 jdouble d;
649 jint i;
650 jlong l;
651 jobject h;
652 } JavaCallValue;
653
654 private:
655 BasicType _type;
656 JavaCallValue _value;
657
658 public:
659 JavaValue(BasicType t = T_ILLEGAL) { _type = t; }
660
661 JavaValue(jfloat value) {
662 _type = T_FLOAT;
663 _value.f = value;
664 }
665
666 JavaValue(jdouble value) {
667 _type = T_DOUBLE;
668 _value.d = value;
669 }
670
671 jfloat get_jfloat() const { return _value.f; }
672 jdouble get_jdouble() const { return _value.d; }
673 jint get_jint() const { return _value.i; }
674 jlong get_jlong() const { return _value.l; }
675 jobject get_jobject() const { return _value.h; }
676 JavaCallValue* get_value_addr() { return &_value; }
677 BasicType get_type() const { return _type; }
678
679 void set_jfloat(jfloat f) { _value.f = f;}
680 void set_jdouble(jdouble d) { _value.d = d;}
681 void set_jint(jint i) { _value.i = i;}
682 void set_jlong(jlong l) { _value.l = l;}
683 void set_jobject(jobject h) { _value.h = h;}
684 void set_type(BasicType t) { _type = t; }
685
686 jboolean get_jboolean() const { return (jboolean) (_value.i);}
687 jbyte get_jbyte() const { return (jbyte) (_value.i);}
688 jchar get_jchar() const { return (jchar) (_value.i);}
689 jshort get_jshort() const { return (jshort) (_value.i);}
690
691 };
692
693
694 #define STACK_BIAS 0
695 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff
696 // in order to extend the reach of the stack pointer.
697 #if defined(SPARC) && defined(_LP64)
698 #undef STACK_BIAS
699 #define STACK_BIAS 0x7ff
700 #endif
701
702
703 // TosState describes the top-of-stack state before and after the execution of
704 // a bytecode or method. The top-of-stack value may be cached in one or more CPU
705 // registers. The TosState corresponds to the 'machine represention' of this cached
706 // value. There's 4 states corresponding to the JAVA types int, long, float & double
707 // as well as a 5th state in case the top-of-stack value is actually on the top
708 // of stack (in memory) and thus not cached. The atos state corresponds to the itos
709 // state when it comes to machine representation but is used separately for (oop)
710 // type specific operations (e.g. verification code).
711
712 enum TosState { // describes the tos cache contents
713 btos = 0, // byte, bool tos cached
714 ctos = 1, // char tos cached
715 stos = 2, // short tos cached
716 itos = 3, // int tos cached
717 ltos = 4, // long tos cached
718 ftos = 5, // float tos cached
719 dtos = 6, // double tos cached
720 atos = 7, // object cached
721 vtos = 8, // tos not cached
722 number_of_states,
723 ilgl // illegal state: should not occur
724 };
725
726
727 inline TosState as_TosState(BasicType type) {
728 switch (type) {
729 case T_BYTE : return btos;
730 case T_BOOLEAN: return btos; // FIXME: Add ztos
731 case T_CHAR : return ctos;
732 case T_SHORT : return stos;
733 case T_INT : return itos;
734 case T_LONG : return ltos;
735 case T_FLOAT : return ftos;
736 case T_DOUBLE : return dtos;
737 case T_VOID : return vtos;
738 case T_ARRAY : // fall through
739 case T_OBJECT : return atos;
740 }
741 return ilgl;
742 }
743
744 inline BasicType as_BasicType(TosState state) {
745 switch (state) {
746 //case ztos: return T_BOOLEAN;//FIXME
747 case btos : return T_BYTE;
748 case ctos : return T_CHAR;
749 case stos : return T_SHORT;
750 case itos : return T_INT;
751 case ltos : return T_LONG;
752 case ftos : return T_FLOAT;
753 case dtos : return T_DOUBLE;
754 case atos : return T_OBJECT;
755 case vtos : return T_VOID;
756 }
757 return T_ILLEGAL;
758 }
759
760
761 // Helper function to convert BasicType info into TosState
762 // Note: Cannot define here as it uses global constant at the time being.
763 TosState as_TosState(BasicType type);
764
765
766 // JavaThreadState keeps track of which part of the code a thread is executing in. This
767 // information is needed by the safepoint code.
768 //
769 // There are 4 essential states:
770 //
771 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code)
772 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles
773 // _thread_in_vm : Executing in the vm
774 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub)
775 //
776 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in
777 // a transition from one state to another. These extra states makes it possible for the safepoint code to
778 // handle certain thread_states without having to suspend the thread - making the safepoint code faster.
779 //
780 // Given a state, the xxx_trans state can always be found by adding 1.
781 //
782 enum JavaThreadState {
783 _thread_uninitialized = 0, // should never happen (missing initialization)
784 _thread_new = 2, // just starting up, i.e., in process of being initialized
785 _thread_new_trans = 3, // corresponding transition state (not used, included for completness)
786 _thread_in_native = 4, // running in native code
787 _thread_in_native_trans = 5, // corresponding transition state
788 _thread_in_vm = 6, // running in VM
789 _thread_in_vm_trans = 7, // corresponding transition state
790 _thread_in_Java = 8, // running in Java or in stub code
791 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness)
792 _thread_blocked = 10, // blocked in vm
793 _thread_blocked_trans = 11, // corresponding transition state
794 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation
795 };
796
797
798 // Handy constants for deciding which compiler mode to use.
799 enum MethodCompilation {
800 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation
801 InvalidOSREntryBci = -2
802 };
803
804 // Enumeration to distinguish tiers of compilation
805 enum CompLevel {
806 CompLevel_any = -1,
807 CompLevel_all = -1,
808 CompLevel_none = 0, // Interpreter
809 CompLevel_simple = 1, // C1
810 CompLevel_limited_profile = 2, // C1, invocation & backedge counters
811 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo
812 CompLevel_full_optimization = 4, // C2 or Shark
813
814 #if defined(COMPILER2) || defined(SHARK)
815 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered
816 #elif defined(COMPILER1)
817 CompLevel_highest_tier = CompLevel_simple, // pure C1
818 #else
819 CompLevel_highest_tier = CompLevel_none,
820 #endif
821
822 #if defined(TIERED)
823 CompLevel_initial_compile = CompLevel_full_profile // tiered
824 #elif defined(COMPILER1)
825 CompLevel_initial_compile = CompLevel_simple // pure C1
826 #elif defined(COMPILER2) || defined(SHARK)
827 CompLevel_initial_compile = CompLevel_full_optimization // pure C2
828 #else
829 CompLevel_initial_compile = CompLevel_none
830 #endif
831 };
832
833 inline bool is_c1_compile(int comp_level) {
834 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization;
835 }
836
837 inline bool is_c2_compile(int comp_level) {
838 return comp_level == CompLevel_full_optimization;
839 }
840
841 inline bool is_highest_tier_compile(int comp_level) {
842 return comp_level == CompLevel_highest_tier;
843 }
844
845 inline bool is_compile(int comp_level) {
846 return is_c1_compile(comp_level) || is_c2_compile(comp_level);
847 }
848
849 //----------------------------------------------------------------------------------------------------
850 // 'Forward' declarations of frequently used classes
851 // (in order to reduce interface dependencies & reduce
852 // number of unnecessary compilations after changes)
853
854 class symbolTable;
855 class ClassFileStream;
856
857 class Event;
858
859 class Thread;
860 class VMThread;
861 class JavaThread;
862 class Threads;
863
864 class VM_Operation;
865 class VMOperationQueue;
866
867 class CodeBlob;
868 class nmethod;
869 class OSRAdapter;
870 class I2CAdapter;
871 class C2IAdapter;
872 class CompiledIC;
873 class relocInfo;
874 class ScopeDesc;
875 class PcDesc;
876
877 class Recompiler;
878 class Recompilee;
879 class RecompilationPolicy;
880 class RFrame;
881 class CompiledRFrame;
882 class InterpretedRFrame;
883
884 class frame;
885
886 class vframe;
887 class javaVFrame;
888 class interpretedVFrame;
889 class compiledVFrame;
890 class deoptimizedVFrame;
891 class externalVFrame;
892 class entryVFrame;
893
894 class RegisterMap;
895
896 class Mutex;
897 class Monitor;
898 class BasicLock;
899 class BasicObjectLock;
900
901 class PeriodicTask;
902
903 class JavaCallWrapper;
904
905 class oopDesc;
906 class metaDataOopDesc;
907
908 class NativeCall;
909
910 class zone;
911
912 class StubQueue;
913
914 class outputStream;
915
916 class ResourceArea;
917
918 class DebugInformationRecorder;
919 class ScopeValue;
920 class CompressedStream;
921 class DebugInfoReadStream;
922 class DebugInfoWriteStream;
923 class LocationValue;
924 class ConstantValue;
925 class IllegalValue;
926
927 class PrivilegedElement;
928 class MonitorArray;
929
930 class MonitorInfo;
931
932 class OffsetClosure;
933 class OopMapCache;
934 class InterpreterOopMap;
935 class OopMapCacheEntry;
936 class OSThread;
937
938 typedef int (*OSThreadStartFunc)(void*);
939
940 class Space;
941
942 class JavaValue;
943 class methodHandle;
944 class JavaCallArguments;
945
946 // Basic support for errors (general debug facilities not defined at this point fo the include phase)
947
948 extern void basic_fatal(const char* msg);
949
950
951 //----------------------------------------------------------------------------------------------------
952 // Special constants for debugging
953
954 const jint badInt = -3; // generic "bad int" value
955 const long badAddressVal = -2; // generic "bad address" value
956 const long badOopVal = -1; // generic "bad oop" value
957 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC
958 const int badHandleValue = 0xBC; // value used to zap vm handle area
959 const int badResourceValue = 0xAB; // value used to zap resource area
960 const int freeBlockPad = 0xBA; // value used to pad freed blocks.
961 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks.
962 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area
963 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC
964 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC
965 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation
966 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation
967
968
969 // (These must be implemented as #defines because C++ compilers are
970 // not obligated to inline non-integral constants!)
971 #define badAddress ((address)::badAddressVal)
972 #define badOop ((oop)::badOopVal)
973 #define badHeapWord (::badHeapWordVal)
974 #define badJNIHandle ((oop)::badJNIHandleVal)
975
976 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit)
977 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17))
978
979 //----------------------------------------------------------------------------------------------------
980 // Utility functions for bitfield manipulations
981
982 const intptr_t AllBits = ~0; // all bits set in a word
983 const intptr_t NoBits = 0; // no bits set in a word
984 const jlong NoLongBits = 0; // no bits set in a long
985 const intptr_t OneBit = 1; // only right_most bit set in a word
986
987 // get a word with the n.th or the right-most or left-most n bits set
988 // (note: #define used only so that they can be used in enum constant definitions)
989 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n))
990 #define right_n_bits(n) (nth_bit(n) - 1)
991 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n)))
992
993 // bit-operations using a mask m
994 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; }
995 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; }
996 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; }
997 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; }
998 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; }
999
1000 // bit-operations using the n.th bit
1001 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); }
1002 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); }
1003 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; }
1004
1005 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!)
1006 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) {
1007 return mask_bits(x >> start_bit_no, right_n_bits(field_length));
1008 }
1009
1010
1011 //----------------------------------------------------------------------------------------------------
1012 // Utility functions for integers
1013
1014 // Avoid use of global min/max macros which may cause unwanted double
1015 // evaluation of arguments.
1016 #ifdef max
1017 #undef max
1018 #endif
1019
1020 #ifdef min
1021 #undef min
1022 #endif
1023
1024 #define max(a,b) Do_not_use_max_use_MAX2_instead
1025 #define min(a,b) Do_not_use_min_use_MIN2_instead
1026
1027 // It is necessary to use templates here. Having normal overloaded
1028 // functions does not work because it is necessary to provide both 32-
1029 // and 64-bit overloaded functions, which does not work, and having
1030 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L)
1031 // will be even more error-prone than macros.
1032 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; }
1033 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; }
1034 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); }
1035 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); }
1036 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); }
1037 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); }
1038
1039 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; }
1040
1041 // true if x is a power of 2, false otherwise
1042 inline bool is_power_of_2(intptr_t x) {
1043 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits));
1044 }
1045
1046 // long version of is_power_of_2
1047 inline bool is_power_of_2_long(jlong x) {
1048 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits));
1049 }
1050
1051 //* largest i such that 2^i <= x
1052 // A negative value of 'x' will return '31'
1053 inline int log2_intptr(intptr_t x) {
1054 int i = -1;
1055 uintptr_t p = 1;
1056 while (p != 0 && p <= (uintptr_t)x) {
1057 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1058 i++; p *= 2;
1059 }
1060 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1061 // (if p = 0 then overflow occurred and i = 31)
1062 return i;
1063 }
1064
1065 //* largest i such that 2^i <= x
1066 // A negative value of 'x' will return '63'
1067 inline int log2_long(jlong x) {
1068 int i = -1;
1069 julong p = 1;
1070 while (p != 0 && p <= (julong)x) {
1071 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1072 i++; p *= 2;
1073 }
1074 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1075 // (if p = 0 then overflow occurred and i = 63)
1076 return i;
1077 }
1078
1079 //* the argument must be exactly a power of 2
1080 inline int exact_log2(intptr_t x) {
1081 #ifdef ASSERT
1082 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2");
1083 #endif
1084 return log2_intptr(x);
1085 }
1086
1087 //* the argument must be exactly a power of 2
1088 inline int exact_log2_long(jlong x) {
1089 #ifdef ASSERT
1090 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2");
1091 #endif
1092 return log2_long(x);
1093 }
1094
1095
1096 // returns integer round-up to the nearest multiple of s (s must be a power of two)
1097 inline intptr_t round_to(intptr_t x, uintx s) {
1098 #ifdef ASSERT
1099 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1100 #endif
1101 const uintx m = s - 1;
1102 return mask_bits(x + m, ~m);
1103 }
1104
1105 // returns integer round-down to the nearest multiple of s (s must be a power of two)
1106 inline intptr_t round_down(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);
1112 }
1113
1114
1115 inline bool is_odd (intx x) { return x & 1; }
1116 inline bool is_even(intx x) { return !is_odd(x); }
1117
1118 // "to" should be greater than "from."
1119 inline intx byte_size(void* from, void* to) {
1120 return (address)to - (address)from;
1121 }
1122
1123 //----------------------------------------------------------------------------------------------------
1124 // Avoid non-portable casts with these routines (DEPRECATED)
1125
1126 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE
1127 // Bytes is optimized machine-specifically and may be much faster then the portable routines below.
1128
1129 // Given sequence of four bytes, build into a 32-bit word
1130 // following the conventions used in class files.
1131 // On the 386, this could be realized with a simple address cast.
1132 //
1133
1134 // This routine takes eight bytes:
1135 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1136 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 ))
1137 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 ))
1138 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 ))
1139 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 ))
1140 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 ))
1141 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 ))
1142 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 ))
1143 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 ));
1144 }
1145
1146 // This routine takes four bytes:
1147 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1148 return (( u4(c1) << 24 ) & 0xff000000)
1149 | (( u4(c2) << 16 ) & 0x00ff0000)
1150 | (( u4(c3) << 8 ) & 0x0000ff00)
1151 | (( u4(c4) << 0 ) & 0x000000ff);
1152 }
1153
1154 // And this one works if the four bytes are contiguous in memory:
1155 inline u4 build_u4_from( u1* p ) {
1156 return build_u4_from( p[0], p[1], p[2], p[3] );
1157 }
1158
1159 // Ditto for two-byte ints:
1160 inline u2 build_u2_from( u1 c1, u1 c2 ) {
1161 return u2((( u2(c1) << 8 ) & 0xff00)
1162 | (( u2(c2) << 0 ) & 0x00ff));
1163 }
1164
1165 // And this one works if the two bytes are contiguous in memory:
1166 inline u2 build_u2_from( u1* p ) {
1167 return build_u2_from( p[0], p[1] );
1168 }
1169
1170 // Ditto for floats:
1171 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1172 u4 u = build_u4_from( c1, c2, c3, c4 );
1173 return *(jfloat*)&u;
1174 }
1175
1176 inline jfloat build_float_from( u1* p ) {
1177 u4 u = build_u4_from( p );
1178 return *(jfloat*)&u;
1179 }
1180
1181
1182 // now (64-bit) longs
1183
1184 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1185 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 ))
1186 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 ))
1187 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 ))
1188 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 ))
1189 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 ))
1190 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 ))
1191 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 ))
1192 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 ));
1193 }
1194
1195 inline jlong build_long_from( u1* p ) {
1196 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] );
1197 }
1198
1199
1200 // Doubles, too!
1201 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1202 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 );
1203 return *(jdouble*)&u;
1204 }
1205
1206 inline jdouble build_double_from( u1* p ) {
1207 jlong u = build_long_from( p );
1208 return *(jdouble*)&u;
1209 }
1210
1211
1212 // Portable routines to go the other way:
1213
1214 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) {
1215 c1 = u1(x >> 8);
1216 c2 = u1(x);
1217 }
1218
1219 inline void explode_short_to( u2 x, u1* p ) {
1220 explode_short_to( x, p[0], p[1]);
1221 }
1222
1223 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) {
1224 c1 = u1(x >> 24);
1225 c2 = u1(x >> 16);
1226 c3 = u1(x >> 8);
1227 c4 = u1(x);
1228 }
1229
1230 inline void explode_int_to( u4 x, u1* p ) {
1231 explode_int_to( x, p[0], p[1], p[2], p[3]);
1232 }
1233
1234
1235 // Pack and extract shorts to/from ints:
1236
1237 inline int extract_low_short_from_int(jint x) {
1238 return x & 0xffff;
1239 }
1240
1241 inline int extract_high_short_from_int(jint x) {
1242 return (x >> 16) & 0xffff;
1243 }
1244
1245 inline int build_int_from_shorts( jushort low, jushort high ) {
1246 return ((int)((unsigned int)high << 16) | (unsigned int)low);
1247 }
1248
1249 // Printf-style formatters for fixed- and variable-width types as pointers and
1250 // integers. These are derived from the definitions in inttypes.h. If the platform
1251 // doesn't provide appropriate definitions, they should be provided in
1252 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp)
1253
1254 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false")
1255
1256 // Format 32-bit quantities.
1257 #define INT32_FORMAT "%" PRId32
1258 #define UINT32_FORMAT "%" PRIu32
1259 #define INT32_FORMAT_W(width) "%" #width PRId32
1260 #define UINT32_FORMAT_W(width) "%" #width PRIu32
1261
1262 #define PTR32_FORMAT "0x%08" PRIx32
1263
1264 // Format 64-bit quantities.
1265 #define INT64_FORMAT "%" PRId64
1266 #define UINT64_FORMAT "%" PRIu64
1267 #define INT64_FORMAT_W(width) "%" #width PRId64
1268 #define UINT64_FORMAT_W(width) "%" #width PRIu64
1269
1270 #define PTR64_FORMAT "0x%016" PRIx64
1271
1272 // Format jlong, if necessary
1273 #ifndef JLONG_FORMAT
1274 #define JLONG_FORMAT INT64_FORMAT
1275 #endif
1276 #ifndef JULONG_FORMAT
1277 #define JULONG_FORMAT UINT64_FORMAT
1278 #endif
1279
1280 // Format pointers which change size between 32- and 64-bit.
1281 #ifdef _LP64
1282 #define INTPTR_FORMAT "0x%016" PRIxPTR
1283 #define PTR_FORMAT "0x%016" PRIxPTR
1284 #else // !_LP64
1285 #define INTPTR_FORMAT "0x%08" PRIxPTR
1286 #define PTR_FORMAT "0x%08" PRIxPTR
1287 #endif // _LP64
1288
1289 #define SSIZE_FORMAT "%" PRIdPTR
1290 #define SIZE_FORMAT "%" PRIuPTR
1291 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR
1292 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR
1293
1294 #define INTX_FORMAT "%" PRIdPTR
1295 #define UINTX_FORMAT "%" PRIuPTR
1296 #define INTX_FORMAT_W(width) "%" #width PRIdPTR
1297 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR
1298
1299
1300 // Enable zap-a-lot if in debug version.
1301
1302 # ifdef ASSERT
1303 # ifdef COMPILER2
1304 # define ENABLE_ZAP_DEAD_LOCALS
1305 #endif /* COMPILER2 */
1306 # endif /* ASSERT */
1307
1308 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0]))
1309
1310 // Dereference vptr
1311 // All C++ compilers that we know of have the vtbl pointer in the first
1312 // word. If there are exceptions, this function needs to be made compiler
1313 // specific.
1314 static inline void* dereference_vptr(void* addr) {
1315 return *(void**)addr;
1316 }
1317
1318
1319 #ifndef PRODUCT
1320
1321 // For unit testing only
1322 class GlobalDefinitions {
1323 public:
1324 static void test_globals();
1325 };
1326
1327 #endif // PRODUCT
1328
1329 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP