1 /*
2 * Copyright (c) 1997, 2016, 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 #ifdef TARGET_COMPILER_xlc
42 # include "utilities/globalDefinitions_xlc.hpp"
43 #endif
44
45 // Defaults for macros that might be defined per compiler.
46 #ifndef NOINLINE
47 #define NOINLINE
48 #endif
49 #ifndef ALWAYSINLINE
50 #define ALWAYSINLINE inline
51 #endif
52
53 #ifndef PRAGMA_DIAG_PUSH
54 #define PRAGMA_DIAG_PUSH
55 #endif
56 #ifndef PRAGMA_DIAG_POP
57 #define PRAGMA_DIAG_POP
58 #endif
59 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED
60 #define PRAGMA_FORMAT_NONLITERAL_IGNORED
61 #endif
62 #ifndef PRAGMA_FORMAT_IGNORED
63 #define PRAGMA_FORMAT_IGNORED
64 #endif
65 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
66 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
67 #endif
68 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
69 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
70 #endif
71 #ifndef PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
72 #define PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
73 #endif
74 #ifndef ATTRIBUTE_PRINTF
75 #define ATTRIBUTE_PRINTF(fmt, vargs)
76 #endif
77
78
79 #include "utilities/macros.hpp"
80
81 // This file holds all globally used constants & types, class (forward)
82 // declarations and a few frequently used utility functions.
83
84 //----------------------------------------------------------------------------------------------------
85 // Constants
86
87 const int LogBytesPerShort = 1;
88 const int LogBytesPerInt = 2;
89 #ifdef _LP64
90 const int LogBytesPerWord = 3;
91 #else
92 const int LogBytesPerWord = 2;
93 #endif
94 const int LogBytesPerLong = 3;
95
96 const int BytesPerShort = 1 << LogBytesPerShort;
97 const int BytesPerInt = 1 << LogBytesPerInt;
98 const int BytesPerWord = 1 << LogBytesPerWord;
99 const int BytesPerLong = 1 << LogBytesPerLong;
100
101 const int LogBitsPerByte = 3;
102 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort;
103 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt;
104 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord;
105 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong;
106
107 const int BitsPerByte = 1 << LogBitsPerByte;
108 const int BitsPerShort = 1 << LogBitsPerShort;
109 const int BitsPerInt = 1 << LogBitsPerInt;
110 const int BitsPerWord = 1 << LogBitsPerWord;
111 const int BitsPerLong = 1 << LogBitsPerLong;
112
113 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1;
114 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1;
115
116 const int WordsPerLong = 2; // Number of stack entries for longs
117
118 const int oopSize = sizeof(char*); // Full-width oop
119 extern int heapOopSize; // Oop within a java object
120 const int wordSize = sizeof(char*);
121 const int longSize = sizeof(jlong);
122 const int jintSize = sizeof(jint);
123 const int size_tSize = sizeof(size_t);
124
125 const int BytesPerOop = BytesPerWord; // Full-width oop
126
127 extern int LogBytesPerHeapOop; // Oop within a java object
128 extern int LogBitsPerHeapOop;
129 extern int BytesPerHeapOop;
130 extern int BitsPerHeapOop;
131
132 // Oop encoding heap max
133 extern uint64_t OopEncodingHeapMax;
134
135 const int BitsPerJavaInteger = 32;
136 const int BitsPerJavaLong = 64;
137 const int BitsPerSize_t = size_tSize * BitsPerByte;
138
139 // Size of a char[] needed to represent a jint as a string in decimal.
140 const int jintAsStringSize = 12;
141
142 // In fact this should be
143 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64);
144 // see os::set_memory_serialize_page()
145 #ifdef _LP64
146 const int SerializePageShiftCount = 4;
147 #else
148 const int SerializePageShiftCount = 3;
149 #endif
150
151 // An opaque struct of heap-word width, so that HeapWord* can be a generic
152 // pointer into the heap. We require that object sizes be measured in
153 // units of heap words, so that that
154 // HeapWord* hw;
155 // hw += oop(hw)->foo();
156 // works, where foo is a method (like size or scavenge) that returns the
157 // object size.
158 class HeapWord {
159 friend class VMStructs;
160 private:
161 char* i;
162 #ifndef PRODUCT
163 public:
164 char* value() { return i; }
165 #endif
166 };
167
168 // Analogous opaque struct for metadata allocated from
169 // metaspaces.
170 class MetaWord {
171 friend class VMStructs;
172 private:
173 char* i;
174 };
175
176 // HeapWordSize must be 2^LogHeapWordSize.
177 const int HeapWordSize = sizeof(HeapWord);
178 #ifdef _LP64
179 const int LogHeapWordSize = 3;
180 #else
181 const int LogHeapWordSize = 2;
182 #endif
183 const int HeapWordsPerLong = BytesPerLong / HeapWordSize;
184 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize;
185
186 // The larger HeapWordSize for 64bit requires larger heaps
187 // for the same application running in 64bit. See bug 4967770.
188 // The minimum alignment to a heap word size is done. Other
189 // parts of the memory system may required additional alignment
190 // and are responsible for those alignments.
191 #ifdef _LP64
192 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize)
193 #else
194 #define ScaleForWordSize(x) (x)
195 #endif
196
197 // The minimum number of native machine words necessary to contain "byte_size"
198 // bytes.
199 inline size_t heap_word_size(size_t byte_size) {
200 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize;
201 }
202
203
204 const size_t K = 1024;
205 const size_t M = K*K;
206 const size_t G = M*K;
207 const size_t HWperKB = K / sizeof(HeapWord);
208
209 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint
210 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint
211
212 // Constants for converting from a base unit to milli-base units. For
213 // example from seconds to milliseconds and microseconds
214
215 const int MILLIUNITS = 1000; // milli units per base unit
216 const int MICROUNITS = 1000000; // micro units per base unit
217 const int NANOUNITS = 1000000000; // nano units per base unit
218
219 const jlong NANOSECS_PER_SEC = CONST64(1000000000);
220 const jint NANOSECS_PER_MILLISEC = 1000000;
221
222 // Proper units routines try to maintain at least three significant digits.
223 // In worst case, it would print five significant digits with lower prefix.
224 // G is close to MAX_SIZE on 32-bit platforms, so its product can easily overflow,
225 // and therefore we need to be careful.
226
227 inline const char* proper_unit_for_byte_size(size_t s) {
228 #ifdef _LP64
229 if (s >= 100*G) {
230 return "G";
231 }
232 #endif
233 if (s >= 100*M) {
234 return "M";
235 } else if (s >= 100*K) {
236 return "K";
237 } else {
238 return "B";
239 }
240 }
241
242 template <class T>
243 inline T byte_size_in_proper_unit(T s) {
244 #ifdef _LP64
245 if (s >= 100*G) {
246 return (T)(s/G);
247 }
248 #endif
249 if (s >= 100*M) {
250 return (T)(s/M);
251 } else if (s >= 100*K) {
252 return (T)(s/K);
253 } else {
254 return s;
255 }
256 }
257
258 //----------------------------------------------------------------------------------------------------
259 // VM type definitions
260
261 // intx and uintx are the 'extended' int and 'extended' unsigned int types;
262 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform.
263
264 typedef intptr_t intx;
265 typedef uintptr_t uintx;
266
267 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1);
268 const intx max_intx = (uintx)min_intx - 1;
269 const uintx max_uintx = (uintx)-1;
270
271 // Table of values:
272 // sizeof intx 4 8
273 // min_intx 0x80000000 0x8000000000000000
274 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF
275 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF
276
277 typedef unsigned int uint; NEEDS_CLEANUP
278
279
280 //----------------------------------------------------------------------------------------------------
281 // Java type definitions
282
283 // All kinds of 'plain' byte addresses
284 typedef signed char s_char;
285 typedef unsigned char u_char;
286 typedef u_char* address;
287 typedef uintptr_t address_word; // unsigned integer which will hold a pointer
288 // except for some implementations of a C++
289 // linkage pointer to function. Should never
290 // need one of those to be placed in this
291 // type anyway.
292
293 // Utility functions to "portably" (?) bit twiddle pointers
294 // Where portable means keep ANSI C++ compilers quiet
295
296 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); }
297 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); }
298
299 // Utility functions to "portably" make cast to/from function pointers.
300
301 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; }
302 inline address_word castable_address(address x) { return address_word(x) ; }
303 inline address_word castable_address(void* x) { return address_word(x) ; }
304
305 // Pointer subtraction.
306 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have
307 // the range we might need to find differences from one end of the heap
308 // to the other.
309 // A typical use might be:
310 // if (pointer_delta(end(), top()) >= size) {
311 // // enough room for an object of size
312 // ...
313 // and then additions like
314 // ... top() + size ...
315 // are safe because we know that top() is at least size below end().
316 inline size_t pointer_delta(const void* left,
317 const void* right,
318 size_t element_size) {
319 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size;
320 }
321 // A version specialized for HeapWord*'s.
322 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) {
323 return pointer_delta(left, right, sizeof(HeapWord));
324 }
325 // A version specialized for MetaWord*'s.
326 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) {
327 return pointer_delta(left, right, sizeof(MetaWord));
328 }
329
330 //
331 // ANSI C++ does not allow casting from one pointer type to a function pointer
332 // directly without at best a warning. This macro accomplishes it silently
333 // In every case that is present at this point the value be cast is a pointer
334 // to a C linkage function. In somecase the type used for the cast reflects
335 // that linkage and a picky compiler would not complain. In other cases because
336 // there is no convenient place to place a typedef with extern C linkage (i.e
337 // a platform dependent header file) it doesn't. At this point no compiler seems
338 // picky enough to catch these instances (which are few). It is possible that
339 // using templates could fix these for all cases. This use of templates is likely
340 // so far from the middle of the road that it is likely to be problematic in
341 // many C++ compilers.
342 //
343 #define CAST_TO_FN_PTR(func_type, value) (reinterpret_cast<func_type>(value))
344 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr)))
345
346 // Unsigned byte types for os and stream.hpp
347
348 // Unsigned one, two, four and eigth byte quantities used for describing
349 // the .class file format. See JVM book chapter 4.
350
351 typedef jubyte u1;
352 typedef jushort u2;
353 typedef juint u4;
354 typedef julong u8;
355
356 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte
357 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort
358 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint
359 const julong max_julong = (julong)-1; // 0xFF....FF largest julong
360
361 typedef jbyte s1;
362 typedef jshort s2;
363 typedef jint s4;
364 typedef jlong s8;
365
366 //----------------------------------------------------------------------------------------------------
367 // JVM spec restrictions
368
369 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134)
370
371 // Default ProtectionDomainCacheSize values
372
373 const int defaultProtectionDomainCacheSize = NOT_LP64(137) LP64_ONLY(2017);
374
375 //----------------------------------------------------------------------------------------------------
376 // Default and minimum StringTableSize values
377
378 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013);
379 const int minimumStringTableSize = 1009;
380
381 const int defaultSymbolTableSize = 20011;
382 const int minimumSymbolTableSize = 1009;
383
384
385 //----------------------------------------------------------------------------------------------------
386 // HotSwap - for JVMTI aka Class File Replacement and PopFrame
387 //
388 // Determines whether on-the-fly class replacement and frame popping are enabled.
389
390 #define HOTSWAP
391
392 //----------------------------------------------------------------------------------------------------
393 // Object alignment, in units of HeapWords.
394 //
395 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and
396 // reference fields can be naturally aligned.
397
398 extern int MinObjAlignment;
399 extern int MinObjAlignmentInBytes;
400 extern int MinObjAlignmentInBytesMask;
401
402 extern int LogMinObjAlignment;
403 extern int LogMinObjAlignmentInBytes;
404
405 const int LogKlassAlignmentInBytes = 3;
406 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize;
407 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes;
408 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize;
409
410 // Klass encoding metaspace max size
411 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes;
412
413 // Machine dependent stuff
414
415 #if defined(X86) && defined(COMPILER2) && !defined(JAVASE_EMBEDDED)
416 // Include Restricted Transactional Memory lock eliding optimization
417 #define INCLUDE_RTM_OPT 1
418 #define RTM_OPT_ONLY(code) code
419 #else
420 #define INCLUDE_RTM_OPT 0
421 #define RTM_OPT_ONLY(code)
422 #endif
423 // States of Restricted Transactional Memory usage.
424 enum RTMState {
425 NoRTM = 0x2, // Don't use RTM
426 UseRTM = 0x1, // Use RTM
427 ProfileRTM = 0x0 // Use RTM with abort ratio calculation
428 };
429
430 #ifdef TARGET_ARCH_x86
431 # include "globalDefinitions_x86.hpp"
432 #endif
433 #ifdef TARGET_ARCH_sparc
434 # include "globalDefinitions_sparc.hpp"
435 #endif
436 #ifdef TARGET_ARCH_zero
437 # include "globalDefinitions_zero.hpp"
438 #endif
439 #ifdef TARGET_ARCH_arm
440 # include "globalDefinitions_arm.hpp"
441 #endif
442 #ifdef TARGET_ARCH_ppc
443 # include "globalDefinitions_ppc.hpp"
444 #endif
445
446 /*
447 * If a platform does not support native stack walking
448 * the platform specific globalDefinitions (above)
449 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0
450 */
451 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
452 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1
453 #endif
454
455 // To assure the IRIW property on processors that are not multiple copy
456 // atomic, sync instructions must be issued between volatile reads to
457 // assure their ordering, instead of after volatile stores.
458 // (See "A Tutorial Introduction to the ARM and POWER Relaxed Memory Models"
459 // by Luc Maranget, Susmit Sarkar and Peter Sewell, INRIA/Cambridge)
460 #ifdef CPU_NOT_MULTIPLE_COPY_ATOMIC
461 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = true;
462 #else
463 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = false;
464 #endif
465
466 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348.
467 // Note: this value must be a power of 2
468
469 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord)
470
471 // Signed variants of alignment helpers. There are two versions of each, a macro
472 // for use in places like enum definitions that require compile-time constant
473 // expressions and a function for all other places so as to get type checking.
474
475 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1))
476
477 inline bool is_size_aligned(size_t size, size_t alignment) {
478 return align_size_up_(size, alignment) == size;
479 }
480
481 inline bool is_ptr_aligned(void* ptr, size_t alignment) {
482 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr;
483 }
484
485 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) {
486 return align_size_up_(size, alignment);
487 }
488
489 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1))
490
491 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) {
492 return align_size_down_(size, alignment);
493 }
494
495 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment)))
496
497 inline void* align_ptr_up(void* ptr, size_t alignment) {
498 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment);
499 }
500
501 inline void* align_ptr_down(void* ptr, size_t alignment) {
502 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment);
503 }
504
505 // Align objects by rounding up their size, in HeapWord units.
506
507 #define align_object_size_(size) align_size_up_(size, MinObjAlignment)
508
509 inline intptr_t align_object_size(intptr_t size) {
510 return align_size_up(size, MinObjAlignment);
511 }
512
513 inline bool is_object_aligned(intptr_t addr) {
514 return addr == align_object_size(addr);
515 }
516
517 // Pad out certain offsets to jlong alignment, in HeapWord units.
518
519 inline intptr_t align_object_offset(intptr_t offset) {
520 return align_size_up(offset, HeapWordsPerLong);
521 }
522
523 inline void* align_pointer_up(const void* addr, size_t size) {
524 return (void*) align_size_up_((uintptr_t)addr, size);
525 }
526
527 // Align down with a lower bound. If the aligning results in 0, return 'alignment'.
528
529 inline size_t align_size_down_bounded(size_t size, size_t alignment) {
530 size_t aligned_size = align_size_down_(size, alignment);
531 return aligned_size > 0 ? aligned_size : alignment;
532 }
533
534 // Clamp an address to be within a specific page
535 // 1. If addr is on the page it is returned as is
536 // 2. If addr is above the page_address the start of the *next* page will be returned
537 // 3. Otherwise, if addr is below the page_address the start of the page will be returned
538 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) {
539 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) {
540 // address is in the specified page, just return it as is
541 return addr;
542 } else if (addr > page_address) {
543 // address is above specified page, return start of next page
544 return (address)align_size_down(intptr_t(page_address), page_size) + page_size;
545 } else {
546 // address is below specified page, return start of page
547 return (address)align_size_down(intptr_t(page_address), page_size);
548 }
549 }
550
551
552 // The expected size in bytes of a cache line, used to pad data structures.
553 #define DEFAULT_CACHE_LINE_SIZE 64
554
555
556 //----------------------------------------------------------------------------------------------------
557 // Utility macros for compilers
558 // used to silence compiler warnings
559
560 #define Unused_Variable(var) var
561
562
563 //----------------------------------------------------------------------------------------------------
564 // Miscellaneous
565
566 // 6302670 Eliminate Hotspot __fabsf dependency
567 // All fabs() callers should call this function instead, which will implicitly
568 // convert the operand to double, avoiding a dependency on __fabsf which
569 // doesn't exist in early versions of Solaris 8.
570 inline double fabsd(double value) {
571 return fabs(value);
572 }
573
574 //----------------------------------------------------------------------------------------------------
575 // Special casts
576 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern
577 typedef union {
578 jfloat f;
579 jint i;
580 } FloatIntConv;
581
582 typedef union {
583 jdouble d;
584 jlong l;
585 julong ul;
586 } DoubleLongConv;
587
588 inline jint jint_cast (jfloat x) { return ((FloatIntConv*)&x)->i; }
589 inline jfloat jfloat_cast (jint x) { return ((FloatIntConv*)&x)->f; }
590
591 inline jlong jlong_cast (jdouble x) { return ((DoubleLongConv*)&x)->l; }
592 inline julong julong_cast (jdouble x) { return ((DoubleLongConv*)&x)->ul; }
593 inline jdouble jdouble_cast (jlong x) { return ((DoubleLongConv*)&x)->d; }
594
595 inline jint low (jlong value) { return jint(value); }
596 inline jint high(jlong value) { return jint(value >> 32); }
597
598 // the fancy casts are a hopefully portable way
599 // to do unsigned 32 to 64 bit type conversion
600 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32;
601 *value |= (jlong)(julong)(juint)low; }
602
603 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff;
604 *value |= (jlong)high << 32; }
605
606 inline jlong jlong_from(jint h, jint l) {
607 jlong result = 0; // initialization to avoid warning
608 set_high(&result, h);
609 set_low(&result, l);
610 return result;
611 }
612
613 union jlong_accessor {
614 jint words[2];
615 jlong long_value;
616 };
617
618 void basic_types_init(); // cannot define here; uses assert
619
620
621 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
622 enum BasicType {
623 T_BOOLEAN = 4,
624 T_CHAR = 5,
625 T_FLOAT = 6,
626 T_DOUBLE = 7,
627 T_BYTE = 8,
628 T_SHORT = 9,
629 T_INT = 10,
630 T_LONG = 11,
631 T_OBJECT = 12,
632 T_ARRAY = 13,
633 T_VOID = 14,
634 T_ADDRESS = 15,
635 T_NARROWOOP = 16,
636 T_METADATA = 17,
637 T_NARROWKLASS = 18,
638 T_CONFLICT = 19, // for stack value type with conflicting contents
639 T_ILLEGAL = 99
640 };
641
642 inline bool is_java_primitive(BasicType t) {
643 return T_BOOLEAN <= t && t <= T_LONG;
644 }
645
646 inline bool is_subword_type(BasicType t) {
647 // these guys are processed exactly like T_INT in calling sequences:
648 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT);
649 }
650
651 inline bool is_signed_subword_type(BasicType t) {
652 return (t == T_BYTE || t == T_SHORT);
653 }
654
655 inline bool is_reference_type(BasicType t) {
656 return (t == T_OBJECT || t == T_ARRAY);
657 }
658
659 // Convert a char from a classfile signature to a BasicType
660 inline BasicType char2type(char c) {
661 switch( c ) {
662 case 'B': return T_BYTE;
663 case 'C': return T_CHAR;
664 case 'D': return T_DOUBLE;
665 case 'F': return T_FLOAT;
666 case 'I': return T_INT;
667 case 'J': return T_LONG;
668 case 'S': return T_SHORT;
669 case 'Z': return T_BOOLEAN;
670 case 'V': return T_VOID;
671 case 'L': return T_OBJECT;
672 case '[': return T_ARRAY;
673 }
674 return T_ILLEGAL;
675 }
676
677 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
678 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; }
679 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements
680 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
681 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; }
682 extern BasicType name2type(const char* name);
683
684 // Auxilary math routines
685 // least common multiple
686 extern size_t lcm(size_t a, size_t b);
687
688
689 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
690 enum BasicTypeSize {
691 T_BOOLEAN_size = 1,
692 T_CHAR_size = 1,
693 T_FLOAT_size = 1,
694 T_DOUBLE_size = 2,
695 T_BYTE_size = 1,
696 T_SHORT_size = 1,
697 T_INT_size = 1,
698 T_LONG_size = 2,
699 T_OBJECT_size = 1,
700 T_ARRAY_size = 1,
701 T_NARROWOOP_size = 1,
702 T_NARROWKLASS_size = 1,
703 T_VOID_size = 0
704 };
705
706
707 // maps a BasicType to its instance field storage type:
708 // all sub-word integral types are widened to T_INT
709 extern BasicType type2field[T_CONFLICT+1];
710 extern BasicType type2wfield[T_CONFLICT+1];
711
712
713 // size in bytes
714 enum ArrayElementSize {
715 T_BOOLEAN_aelem_bytes = 1,
716 T_CHAR_aelem_bytes = 2,
717 T_FLOAT_aelem_bytes = 4,
718 T_DOUBLE_aelem_bytes = 8,
719 T_BYTE_aelem_bytes = 1,
720 T_SHORT_aelem_bytes = 2,
721 T_INT_aelem_bytes = 4,
722 T_LONG_aelem_bytes = 8,
723 #ifdef _LP64
724 T_OBJECT_aelem_bytes = 8,
725 T_ARRAY_aelem_bytes = 8,
726 #else
727 T_OBJECT_aelem_bytes = 4,
728 T_ARRAY_aelem_bytes = 4,
729 #endif
730 T_NARROWOOP_aelem_bytes = 4,
731 T_NARROWKLASS_aelem_bytes = 4,
732 T_VOID_aelem_bytes = 0
733 };
734
735 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element
736 #ifdef ASSERT
737 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts
738 #else
739 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; }
740 #endif
741
742
743 // JavaValue serves as a container for arbitrary Java values.
744
745 class JavaValue {
746
747 public:
748 typedef union JavaCallValue {
749 jfloat f;
750 jdouble d;
751 jint i;
752 jlong l;
753 jobject h;
754 } JavaCallValue;
755
756 private:
757 BasicType _type;
758 JavaCallValue _value;
759
760 public:
761 JavaValue(BasicType t = T_ILLEGAL) { _type = t; }
762
763 JavaValue(jfloat value) {
764 _type = T_FLOAT;
765 _value.f = value;
766 }
767
768 JavaValue(jdouble value) {
769 _type = T_DOUBLE;
770 _value.d = value;
771 }
772
773 jfloat get_jfloat() const { return _value.f; }
774 jdouble get_jdouble() const { return _value.d; }
775 jint get_jint() const { return _value.i; }
776 jlong get_jlong() const { return _value.l; }
777 jobject get_jobject() const { return _value.h; }
778 JavaCallValue* get_value_addr() { return &_value; }
779 BasicType get_type() const { return _type; }
780
781 void set_jfloat(jfloat f) { _value.f = f;}
782 void set_jdouble(jdouble d) { _value.d = d;}
783 void set_jint(jint i) { _value.i = i;}
784 void set_jlong(jlong l) { _value.l = l;}
785 void set_jobject(jobject h) { _value.h = h;}
786 void set_type(BasicType t) { _type = t; }
787
788 jboolean get_jboolean() const { return (jboolean) (_value.i);}
789 jbyte get_jbyte() const { return (jbyte) (_value.i);}
790 jchar get_jchar() const { return (jchar) (_value.i);}
791 jshort get_jshort() const { return (jshort) (_value.i);}
792
793 };
794
795
796 #define STACK_BIAS 0
797 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff
798 // in order to extend the reach of the stack pointer.
799 #if defined(SPARC) && defined(_LP64)
800 #undef STACK_BIAS
801 #define STACK_BIAS 0x7ff
802 #endif
803
804
805 // TosState describes the top-of-stack state before and after the execution of
806 // a bytecode or method. The top-of-stack value may be cached in one or more CPU
807 // registers. The TosState corresponds to the 'machine represention' of this cached
808 // value. There's 4 states corresponding to the JAVA types int, long, float & double
809 // as well as a 5th state in case the top-of-stack value is actually on the top
810 // of stack (in memory) and thus not cached. The atos state corresponds to the itos
811 // state when it comes to machine representation but is used separately for (oop)
812 // type specific operations (e.g. verification code).
813
814 enum TosState { // describes the tos cache contents
815 btos = 0, // byte, bool tos cached
816 ztos = 1, // byte, bool tos cached
817 ctos = 2, // char tos cached
818 stos = 3, // short tos cached
819 itos = 4, // int tos cached
820 ltos = 5, // long tos cached
821 ftos = 6, // float tos cached
822 dtos = 7, // double tos cached
823 atos = 8, // object cached
824 vtos = 9, // tos not cached
825 number_of_states,
826 ilgl // illegal state: should not occur
827 };
828
829
830 inline TosState as_TosState(BasicType type) {
831 switch (type) {
832 case T_BYTE : return btos;
833 case T_BOOLEAN: return ztos;
834 case T_CHAR : return ctos;
835 case T_SHORT : return stos;
836 case T_INT : return itos;
837 case T_LONG : return ltos;
838 case T_FLOAT : return ftos;
839 case T_DOUBLE : return dtos;
840 case T_VOID : return vtos;
841 case T_ARRAY : // fall through
842 case T_OBJECT : return atos;
843 }
844 return ilgl;
845 }
846
847 inline BasicType as_BasicType(TosState state) {
848 switch (state) {
849 case btos : return T_BYTE;
850 case ztos : return T_BOOLEAN;
851 case ctos : return T_CHAR;
852 case stos : return T_SHORT;
853 case itos : return T_INT;
854 case ltos : return T_LONG;
855 case ftos : return T_FLOAT;
856 case dtos : return T_DOUBLE;
857 case atos : return T_OBJECT;
858 case vtos : return T_VOID;
859 }
860 return T_ILLEGAL;
861 }
862
863
864 // Helper function to convert BasicType info into TosState
865 // Note: Cannot define here as it uses global constant at the time being.
866 TosState as_TosState(BasicType type);
867
868
869 // JavaThreadState keeps track of which part of the code a thread is executing in. This
870 // information is needed by the safepoint code.
871 //
872 // There are 4 essential states:
873 //
874 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code)
875 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles
876 // _thread_in_vm : Executing in the vm
877 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub)
878 //
879 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in
880 // a transition from one state to another. These extra states makes it possible for the safepoint code to
881 // handle certain thread_states without having to suspend the thread - making the safepoint code faster.
882 //
883 // Given a state, the xxx_trans state can always be found by adding 1.
884 //
885 enum JavaThreadState {
886 _thread_uninitialized = 0, // should never happen (missing initialization)
887 _thread_new = 2, // just starting up, i.e., in process of being initialized
888 _thread_new_trans = 3, // corresponding transition state (not used, included for completness)
889 _thread_in_native = 4, // running in native code
890 _thread_in_native_trans = 5, // corresponding transition state
891 _thread_in_vm = 6, // running in VM
892 _thread_in_vm_trans = 7, // corresponding transition state
893 _thread_in_Java = 8, // running in Java or in stub code
894 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness)
895 _thread_blocked = 10, // blocked in vm
896 _thread_blocked_trans = 11, // corresponding transition state
897 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation
898 };
899
900
901 // Handy constants for deciding which compiler mode to use.
902 enum MethodCompilation {
903 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation
904 InvalidOSREntryBci = -2
905 };
906
907 // Enumeration to distinguish tiers of compilation
908 enum CompLevel {
909 CompLevel_any = -1,
910 CompLevel_all = -1,
911 CompLevel_none = 0, // Interpreter
912 CompLevel_simple = 1, // C1
913 CompLevel_limited_profile = 2, // C1, invocation & backedge counters
914 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo
915 CompLevel_full_optimization = 4, // C2 or Shark
916
917 #if defined(COMPILER2) || defined(SHARK)
918 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered
919 #elif defined(COMPILER1)
920 CompLevel_highest_tier = CompLevel_simple, // pure C1
921 #else
922 CompLevel_highest_tier = CompLevel_none,
923 #endif
924
925 #if defined(TIERED)
926 CompLevel_initial_compile = CompLevel_full_profile // tiered
927 #elif defined(COMPILER1)
928 CompLevel_initial_compile = CompLevel_simple // pure C1
929 #elif defined(COMPILER2) || defined(SHARK)
930 CompLevel_initial_compile = CompLevel_full_optimization // pure C2
931 #else
932 CompLevel_initial_compile = CompLevel_none
933 #endif
934 };
935
936 inline bool is_c1_compile(int comp_level) {
937 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization;
938 }
939
940 inline bool is_c2_compile(int comp_level) {
941 return comp_level == CompLevel_full_optimization;
942 }
943
944 inline bool is_highest_tier_compile(int comp_level) {
945 return comp_level == CompLevel_highest_tier;
946 }
947
948 inline bool is_compile(int comp_level) {
949 return is_c1_compile(comp_level) || is_c2_compile(comp_level);
950 }
951
952 //----------------------------------------------------------------------------------------------------
953 // 'Forward' declarations of frequently used classes
954 // (in order to reduce interface dependencies & reduce
955 // number of unnecessary compilations after changes)
956
957 class symbolTable;
958 class ClassFileStream;
959
960 class Event;
961
962 class Thread;
963 class VMThread;
964 class JavaThread;
965 class Threads;
966
967 class VM_Operation;
968 class VMOperationQueue;
969
970 class CodeBlob;
971 class nmethod;
972 class OSRAdapter;
973 class I2CAdapter;
974 class C2IAdapter;
975 class CompiledIC;
976 class relocInfo;
977 class ScopeDesc;
978 class PcDesc;
979
980 class Recompiler;
981 class Recompilee;
982 class RecompilationPolicy;
983 class RFrame;
984 class CompiledRFrame;
985 class InterpretedRFrame;
986
987 class frame;
988
989 class vframe;
990 class javaVFrame;
991 class interpretedVFrame;
992 class compiledVFrame;
993 class deoptimizedVFrame;
994 class externalVFrame;
995 class entryVFrame;
996
997 class RegisterMap;
998
999 class Mutex;
1000 class Monitor;
1001 class BasicLock;
1002 class BasicObjectLock;
1003
1004 class PeriodicTask;
1005
1006 class JavaCallWrapper;
1007
1008 class oopDesc;
1009 class metaDataOopDesc;
1010
1011 class NativeCall;
1012
1013 class zone;
1014
1015 class StubQueue;
1016
1017 class outputStream;
1018
1019 class ResourceArea;
1020
1021 class DebugInformationRecorder;
1022 class ScopeValue;
1023 class CompressedStream;
1024 class DebugInfoReadStream;
1025 class DebugInfoWriteStream;
1026 class LocationValue;
1027 class ConstantValue;
1028 class IllegalValue;
1029
1030 class PrivilegedElement;
1031 class MonitorArray;
1032
1033 class MonitorInfo;
1034
1035 class OffsetClosure;
1036 class OopMapCache;
1037 class InterpreterOopMap;
1038 class OopMapCacheEntry;
1039 class OSThread;
1040
1041 typedef int (*OSThreadStartFunc)(void*);
1042
1043 class Space;
1044
1045 class JavaValue;
1046 class methodHandle;
1047 class JavaCallArguments;
1048
1049 // Basic support for errors (general debug facilities not defined at this point fo the include phase)
1050
1051 extern void basic_fatal(const char* msg);
1052
1053
1054 //----------------------------------------------------------------------------------------------------
1055 // Special constants for debugging
1056
1057 const jint badInt = -3; // generic "bad int" value
1058 const intptr_t badAddressVal = -2; // generic "bad address" value
1059 const intptr_t badOopVal = -1; // generic "bad oop" value
1060 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC
1061 const int badStackSegVal = 0xCA; // value used to zap stack segments
1062 const int badHandleValue = 0xBC; // value used to zap vm handle area
1063 const int badResourceValue = 0xAB; // value used to zap resource area
1064 const int freeBlockPad = 0xBA; // value used to pad freed blocks.
1065 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks.
1066 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area
1067 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC
1068 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC
1069 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation
1070 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation
1071
1072
1073 // (These must be implemented as #defines because C++ compilers are
1074 // not obligated to inline non-integral constants!)
1075 #define badAddress ((address)::badAddressVal)
1076 #define badOop (cast_to_oop(::badOopVal))
1077 #define badHeapWord (::badHeapWordVal)
1078 #define badJNIHandle (cast_to_oop(::badJNIHandleVal))
1079
1080 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit)
1081 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17))
1082
1083 //----------------------------------------------------------------------------------------------------
1084 // Utility functions for bitfield manipulations
1085
1086 const intptr_t AllBits = ~0; // all bits set in a word
1087 const intptr_t NoBits = 0; // no bits set in a word
1088 const jlong NoLongBits = 0; // no bits set in a long
1089 const intptr_t OneBit = 1; // only right_most bit set in a word
1090
1091 // get a word with the n.th or the right-most or left-most n bits set
1092 // (note: #define used only so that they can be used in enum constant definitions)
1093 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n))
1094 #define right_n_bits(n) (nth_bit(n) - 1)
1095 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n)))
1096
1097 // bit-operations using a mask m
1098 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; }
1099 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; }
1100 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; }
1101 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; }
1102 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; }
1103
1104 // bit-operations using the n.th bit
1105 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); }
1106 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); }
1107 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; }
1108
1109 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!)
1110 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) {
1111 return mask_bits(x >> start_bit_no, right_n_bits(field_length));
1112 }
1113
1114
1115 //----------------------------------------------------------------------------------------------------
1116 // Utility functions for integers
1117
1118 // Avoid use of global min/max macros which may cause unwanted double
1119 // evaluation of arguments.
1120 #ifdef max
1121 #undef max
1122 #endif
1123
1124 #ifdef min
1125 #undef min
1126 #endif
1127
1128 #define max(a,b) Do_not_use_max_use_MAX2_instead
1129 #define min(a,b) Do_not_use_min_use_MIN2_instead
1130
1131 // It is necessary to use templates here. Having normal overloaded
1132 // functions does not work because it is necessary to provide both 32-
1133 // and 64-bit overloaded functions, which does not work, and having
1134 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L)
1135 // will be even more error-prone than macros.
1136 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; }
1137 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; }
1138 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); }
1139 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); }
1140 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); }
1141 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); }
1142
1143 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; }
1144
1145 // true if x is a power of 2, false otherwise
1146 inline bool is_power_of_2(intptr_t x) {
1147 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits));
1148 }
1149
1150 // long version of is_power_of_2
1151 inline bool is_power_of_2_long(jlong x) {
1152 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits));
1153 }
1154
1155 //* largest i such that 2^i <= x
1156 // A negative value of 'x' will return '31'
1157 inline int log2_intptr(uintptr_t x) {
1158 int i = -1;
1159 uintptr_t p = 1;
1160 while (p != 0 && p <= x) {
1161 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1162 i++; p *= 2;
1163 }
1164 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1165 // (if p = 0 then overflow occurred and i = 31)
1166 return i;
1167 }
1168
1169 //* largest i such that 2^i <= x
1170 inline int log2_long(julong x) {
1171 int i = -1;
1172 julong p = 1;
1173 while (p != 0 && p <= x) {
1174 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1175 i++; p *= 2;
1176 }
1177 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1178 // (if p = 0 then overflow occurred and i = 63)
1179 return i;
1180 }
1181
1182 inline int log2_intptr(intptr_t x) {
1183 return log2_intptr((uintptr_t)x);
1184 }
1185
1186 inline int log2_int(int x) {
1187 return log2_intptr((uintptr_t)x);
1188 }
1189
1190 inline int log2_jint(jint x) {
1191 return log2_intptr((uintptr_t)x);
1192 }
1193
1194 inline int log2_uint(uint x) {
1195 return log2_intptr((uintptr_t)x);
1196 }
1197
1198 // A negative value of 'x' will return '63'
1199 inline int log2_jlong(jlong x) {
1200 return log2_long((julong)x);
1201 }
1202
1203 //* the argument must be exactly a power of 2
1204 inline int exact_log2(intptr_t x) {
1205 #ifdef ASSERT
1206 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2");
1207 #endif
1208 return log2_intptr(x);
1209 }
1210
1211 //* the argument must be exactly a power of 2
1212 inline int exact_log2_long(jlong x) {
1213 #ifdef ASSERT
1214 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2");
1215 #endif
1216 return log2_long(x);
1217 }
1218
1219
1220 // returns integer round-up to the nearest multiple of s (s must be a power of two)
1221 inline intptr_t round_to(intptr_t x, uintx s) {
1222 #ifdef ASSERT
1223 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1224 #endif
1225 const uintx m = s - 1;
1226 return mask_bits(x + m, ~m);
1227 }
1228
1229 // returns integer round-down to the nearest multiple of s (s must be a power of two)
1230 inline intptr_t round_down(intptr_t x, uintx s) {
1231 #ifdef ASSERT
1232 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1233 #endif
1234 const uintx m = s - 1;
1235 return mask_bits(x, ~m);
1236 }
1237
1238
1239 inline bool is_odd (intx x) { return x & 1; }
1240 inline bool is_even(intx x) { return !is_odd(x); }
1241
1242 // abs methods which cannot overflow and so are well-defined across
1243 // the entire domain of integer types.
1244 static inline unsigned int uabs(unsigned int n) {
1245 union {
1246 unsigned int result;
1247 int value;
1248 };
1249 result = n;
1250 if (value < 0) result = 0-result;
1251 return result;
1252 }
1253 static inline julong uabs(julong n) {
1254 union {
1255 julong result;
1256 jlong value;
1257 };
1258 result = n;
1259 if (value < 0) result = 0-result;
1260 return result;
1261 }
1262 static inline julong uabs(jlong n) { return uabs((julong)n); }
1263 static inline unsigned int uabs(int n) { return uabs((unsigned int)n); }
1264
1265 // "to" should be greater than "from."
1266 inline intx byte_size(void* from, void* to) {
1267 return (address)to - (address)from;
1268 }
1269
1270 //----------------------------------------------------------------------------------------------------
1271 // Avoid non-portable casts with these routines (DEPRECATED)
1272
1273 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE
1274 // Bytes is optimized machine-specifically and may be much faster then the portable routines below.
1275
1276 // Given sequence of four bytes, build into a 32-bit word
1277 // following the conventions used in class files.
1278 // On the 386, this could be realized with a simple address cast.
1279 //
1280
1281 // This routine takes eight bytes:
1282 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1283 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 ))
1284 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 ))
1285 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 ))
1286 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 ))
1287 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 ))
1288 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 ))
1289 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 ))
1290 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 ));
1291 }
1292
1293 // This routine takes four bytes:
1294 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1295 return (( u4(c1) << 24 ) & 0xff000000)
1296 | (( u4(c2) << 16 ) & 0x00ff0000)
1297 | (( u4(c3) << 8 ) & 0x0000ff00)
1298 | (( u4(c4) << 0 ) & 0x000000ff);
1299 }
1300
1301 // And this one works if the four bytes are contiguous in memory:
1302 inline u4 build_u4_from( u1* p ) {
1303 return build_u4_from( p[0], p[1], p[2], p[3] );
1304 }
1305
1306 // Ditto for two-byte ints:
1307 inline u2 build_u2_from( u1 c1, u1 c2 ) {
1308 return u2((( u2(c1) << 8 ) & 0xff00)
1309 | (( u2(c2) << 0 ) & 0x00ff));
1310 }
1311
1312 // And this one works if the two bytes are contiguous in memory:
1313 inline u2 build_u2_from( u1* p ) {
1314 return build_u2_from( p[0], p[1] );
1315 }
1316
1317 // Ditto for floats:
1318 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1319 u4 u = build_u4_from( c1, c2, c3, c4 );
1320 return *(jfloat*)&u;
1321 }
1322
1323 inline jfloat build_float_from( u1* p ) {
1324 u4 u = build_u4_from( p );
1325 return *(jfloat*)&u;
1326 }
1327
1328
1329 // now (64-bit) longs
1330
1331 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1332 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 ))
1333 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 ))
1334 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 ))
1335 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 ))
1336 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 ))
1337 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 ))
1338 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 ))
1339 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 ));
1340 }
1341
1342 inline jlong build_long_from( u1* p ) {
1343 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] );
1344 }
1345
1346
1347 // Doubles, too!
1348 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1349 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 );
1350 return *(jdouble*)&u;
1351 }
1352
1353 inline jdouble build_double_from( u1* p ) {
1354 jlong u = build_long_from( p );
1355 return *(jdouble*)&u;
1356 }
1357
1358
1359 // Portable routines to go the other way:
1360
1361 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) {
1362 c1 = u1(x >> 8);
1363 c2 = u1(x);
1364 }
1365
1366 inline void explode_short_to( u2 x, u1* p ) {
1367 explode_short_to( x, p[0], p[1]);
1368 }
1369
1370 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) {
1371 c1 = u1(x >> 24);
1372 c2 = u1(x >> 16);
1373 c3 = u1(x >> 8);
1374 c4 = u1(x);
1375 }
1376
1377 inline void explode_int_to( u4 x, u1* p ) {
1378 explode_int_to( x, p[0], p[1], p[2], p[3]);
1379 }
1380
1381
1382 // Pack and extract shorts to/from ints:
1383
1384 inline int extract_low_short_from_int(jint x) {
1385 return x & 0xffff;
1386 }
1387
1388 inline int extract_high_short_from_int(jint x) {
1389 return (x >> 16) & 0xffff;
1390 }
1391
1392 inline int build_int_from_shorts( jushort low, jushort high ) {
1393 return ((int)((unsigned int)high << 16) | (unsigned int)low);
1394 }
1395
1396 // Convert pointer to intptr_t, for use in printing pointers.
1397 inline intptr_t p2i(const void * p) {
1398 return (intptr_t) p;
1399 }
1400
1401 // Printf-style formatters for fixed- and variable-width types as pointers and
1402 // integers. These are derived from the definitions in inttypes.h. If the platform
1403 // doesn't provide appropriate definitions, they should be provided in
1404 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp)
1405
1406 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false")
1407
1408 // Format 32-bit quantities.
1409 #define INT32_FORMAT "%" PRId32
1410 #define UINT32_FORMAT "%" PRIu32
1411 #define INT32_FORMAT_W(width) "%" #width PRId32
1412 #define UINT32_FORMAT_W(width) "%" #width PRIu32
1413
1414 #define PTR32_FORMAT "0x%08" PRIx32
1415
1416 // Format 64-bit quantities.
1417 #define INT64_FORMAT "%" PRId64
1418 #define UINT64_FORMAT "%" PRIu64
1419 #define UINT64_FORMAT_X "%" PRIx64
1420 #define INT64_FORMAT_W(width) "%" #width PRId64
1421 #define UINT64_FORMAT_W(width) "%" #width PRIu64
1422
1423 #define PTR64_FORMAT "0x%016" PRIx64
1424
1425 // Format jlong, if necessary
1426 #ifndef JLONG_FORMAT
1427 #define JLONG_FORMAT INT64_FORMAT
1428 #endif
1429 #ifndef JULONG_FORMAT
1430 #define JULONG_FORMAT UINT64_FORMAT
1431 #endif
1432
1433 // Format pointers which change size between 32- and 64-bit.
1434 #ifdef _LP64
1435 #define INTPTR_FORMAT "0x%016" PRIxPTR
1436 #define PTR_FORMAT "0x%016" PRIxPTR
1437 #else // !_LP64
1438 #define INTPTR_FORMAT "0x%08" PRIxPTR
1439 #define PTR_FORMAT "0x%08" PRIxPTR
1440 #endif // _LP64
1441
1442 #define INTPTR_FORMAT_W(width) "%" #width PRIxPTR
1443
1444 #define SSIZE_FORMAT "%" PRIdPTR
1445 #define SIZE_FORMAT "%" PRIuPTR
1446 #define SIZE_FORMAT_HEX "0x%" PRIxPTR
1447 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR
1448 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR
1449 #define SIZE_FORMAT_HEX_W(width) "0x%" #width PRIxPTR
1450
1451 #define INTX_FORMAT "%" PRIdPTR
1452 #define UINTX_FORMAT "%" PRIuPTR
1453 #define INTX_FORMAT_W(width) "%" #width PRIdPTR
1454 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR
1455
1456
1457 // Enable zap-a-lot if in debug version.
1458
1459 # ifdef ASSERT
1460 # ifdef COMPILER2
1461 # define ENABLE_ZAP_DEAD_LOCALS
1462 #endif /* COMPILER2 */
1463 # endif /* ASSERT */
1464
1465 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0]))
1466
1467 //----------------------------------------------------------------------------------------------------
1468 // Sum and product which can never overflow: they wrap, just like the
1469 // Java operations. Note that we don't intend these to be used for
1470 // general-purpose arithmetic: their purpose is to emulate Java
1471 // operations.
1472
1473 // The goal of this code to avoid undefined or implementation-defined
1474 // behaviour. The use of an lvalue to reference cast is explicitly
1475 // permitted by Lvalues and rvalues [basic.lval]. [Section 3.10 Para
1476 // 15 in C++03]
1477 #define JAVA_INTEGER_OP(OP, NAME, TYPE, UNSIGNED_TYPE) \
1478 inline TYPE NAME (TYPE in1, TYPE in2) { \
1479 UNSIGNED_TYPE ures = static_cast<UNSIGNED_TYPE>(in1); \
1480 ures OP ## = static_cast<UNSIGNED_TYPE>(in2); \
1481 return reinterpret_cast<TYPE&>(ures); \
1482 }
1483
1484 JAVA_INTEGER_OP(+, java_add, jint, juint)
1485 JAVA_INTEGER_OP(-, java_subtract, jint, juint)
1486 JAVA_INTEGER_OP(*, java_multiply, jint, juint)
1487 JAVA_INTEGER_OP(+, java_add, jlong, julong)
1488 JAVA_INTEGER_OP(-, java_subtract, jlong, julong)
1489 JAVA_INTEGER_OP(*, java_multiply, jlong, julong)
1490
1491 #undef JAVA_INTEGER_OP
1492
1493 // Dereference vptr
1494 // All C++ compilers that we know of have the vtbl pointer in the first
1495 // word. If there are exceptions, this function needs to be made compiler
1496 // specific.
1497 static inline void* dereference_vptr(const void* addr) {
1498 return *(void**)addr;
1499 }
1500
1501 #ifndef PRODUCT
1502
1503 // For unit testing only
1504 class GlobalDefinitions {
1505 public:
1506 static void test_globals();
1507 static void test_proper_unit();
1508 };
1509
1510 #endif // PRODUCT
1511
1512 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP