Thu, 27 Dec 2018 11:43:33 +0800
Merge
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 */
25 /*
26 * This file has been modified by Loongson Technology in 2015. These
27 * modifications are Copyright (c) 2015 Loongson Technology, and are made
28 * available on the same license terms set forth above.
29 */
31 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP
32 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP
34 #ifndef __STDC_FORMAT_MACROS
35 #define __STDC_FORMAT_MACROS
36 #endif
38 #ifdef TARGET_COMPILER_gcc
39 # include "utilities/globalDefinitions_gcc.hpp"
40 #endif
41 #ifdef TARGET_COMPILER_visCPP
42 # include "utilities/globalDefinitions_visCPP.hpp"
43 #endif
44 #ifdef TARGET_COMPILER_sparcWorks
45 # include "utilities/globalDefinitions_sparcWorks.hpp"
46 #endif
47 #ifdef TARGET_COMPILER_xlc
48 # include "utilities/globalDefinitions_xlc.hpp"
49 #endif
51 #ifndef PRAGMA_DIAG_PUSH
52 #define PRAGMA_DIAG_PUSH
53 #endif
54 #ifndef PRAGMA_DIAG_POP
55 #define PRAGMA_DIAG_POP
56 #endif
57 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED
58 #define PRAGMA_FORMAT_NONLITERAL_IGNORED
59 #endif
60 #ifndef PRAGMA_FORMAT_IGNORED
61 #define PRAGMA_FORMAT_IGNORED
62 #endif
63 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
64 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL
65 #endif
66 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
67 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL
68 #endif
69 #ifndef PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
70 #define PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
71 #endif
72 #ifndef ATTRIBUTE_PRINTF
73 #define ATTRIBUTE_PRINTF(fmt, vargs)
74 #endif
77 #include "utilities/macros.hpp"
79 // This file holds all globally used constants & types, class (forward)
80 // declarations and a few frequently used utility functions.
82 //----------------------------------------------------------------------------------------------------
83 // Constants
85 const int LogBytesPerShort = 1;
86 const int LogBytesPerInt = 2;
87 #ifdef _LP64
88 const int LogBytesPerWord = 3;
89 #else
90 const int LogBytesPerWord = 2;
91 #endif
92 const int LogBytesPerLong = 3;
94 const int BytesPerShort = 1 << LogBytesPerShort;
95 const int BytesPerInt = 1 << LogBytesPerInt;
96 const int BytesPerWord = 1 << LogBytesPerWord;
97 const int BytesPerLong = 1 << LogBytesPerLong;
99 const int LogBitsPerByte = 3;
100 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort;
101 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt;
102 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord;
103 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong;
105 const int BitsPerByte = 1 << LogBitsPerByte;
106 const int BitsPerShort = 1 << LogBitsPerShort;
107 const int BitsPerInt = 1 << LogBitsPerInt;
108 const int BitsPerWord = 1 << LogBitsPerWord;
109 const int BitsPerLong = 1 << LogBitsPerLong;
111 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1;
112 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1;
114 const int WordsPerLong = 2; // Number of stack entries for longs
116 const int oopSize = sizeof(char*); // Full-width oop
117 extern int heapOopSize; // Oop within a java object
118 const int wordSize = sizeof(char*);
119 const int longSize = sizeof(jlong);
120 const int jintSize = sizeof(jint);
121 const int size_tSize = sizeof(size_t);
123 const int BytesPerOop = BytesPerWord; // Full-width oop
125 extern int LogBytesPerHeapOop; // Oop within a java object
126 extern int LogBitsPerHeapOop;
127 extern int BytesPerHeapOop;
128 extern int BitsPerHeapOop;
130 // Oop encoding heap max
131 extern uint64_t OopEncodingHeapMax;
133 const int BitsPerJavaInteger = 32;
134 const int BitsPerJavaLong = 64;
135 const int BitsPerSize_t = size_tSize * BitsPerByte;
137 // Size of a char[] needed to represent a jint as a string in decimal.
138 const int jintAsStringSize = 12;
140 // In fact this should be
141 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64);
142 // see os::set_memory_serialize_page()
143 #ifdef _LP64
144 const int SerializePageShiftCount = 4;
145 #else
146 const int SerializePageShiftCount = 3;
147 #endif
149 // An opaque struct of heap-word width, so that HeapWord* can be a generic
150 // pointer into the heap. We require that object sizes be measured in
151 // units of heap words, so that that
152 // HeapWord* hw;
153 // hw += oop(hw)->foo();
154 // works, where foo is a method (like size or scavenge) that returns the
155 // object size.
156 class HeapWord {
157 friend class VMStructs;
158 private:
159 char* i;
160 #ifndef PRODUCT
161 public:
162 char* value() { return i; }
163 #endif
164 };
166 // Analogous opaque struct for metadata allocated from
167 // metaspaces.
168 class MetaWord {
169 friend class VMStructs;
170 private:
171 char* i;
172 };
174 // HeapWordSize must be 2^LogHeapWordSize.
175 const int HeapWordSize = sizeof(HeapWord);
176 #ifdef _LP64
177 const int LogHeapWordSize = 3;
178 #else
179 const int LogHeapWordSize = 2;
180 #endif
181 const int HeapWordsPerLong = BytesPerLong / HeapWordSize;
182 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize;
184 // The larger HeapWordSize for 64bit requires larger heaps
185 // for the same application running in 64bit. See bug 4967770.
186 // The minimum alignment to a heap word size is done. Other
187 // parts of the memory system may required additional alignment
188 // and are responsible for those alignments.
189 #ifdef _LP64
190 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize)
191 #else
192 #define ScaleForWordSize(x) (x)
193 #endif
195 // The minimum number of native machine words necessary to contain "byte_size"
196 // bytes.
197 inline size_t heap_word_size(size_t byte_size) {
198 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize;
199 }
202 const size_t K = 1024;
203 const size_t M = K*K;
204 const size_t G = M*K;
205 const size_t HWperKB = K / sizeof(HeapWord);
207 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint
208 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint
210 // Constants for converting from a base unit to milli-base units. For
211 // example from seconds to milliseconds and microseconds
213 const int MILLIUNITS = 1000; // milli units per base unit
214 const int MICROUNITS = 1000000; // micro units per base unit
215 const int NANOUNITS = 1000000000; // nano units per base unit
217 const jlong NANOSECS_PER_SEC = CONST64(1000000000);
218 const jint NANOSECS_PER_MILLISEC = 1000000;
220 inline const char* proper_unit_for_byte_size(size_t s) {
221 #ifdef _LP64
222 if (s >= 10*G) {
223 return "G";
224 }
225 #endif
226 if (s >= 10*M) {
227 return "M";
228 } else if (s >= 10*K) {
229 return "K";
230 } else {
231 return "B";
232 }
233 }
235 template <class T>
236 inline T byte_size_in_proper_unit(T s) {
237 #ifdef _LP64
238 if (s >= 10*G) {
239 return (T)(s/G);
240 }
241 #endif
242 if (s >= 10*M) {
243 return (T)(s/M);
244 } else if (s >= 10*K) {
245 return (T)(s/K);
246 } else {
247 return s;
248 }
249 }
251 //----------------------------------------------------------------------------------------------------
252 // VM type definitions
254 // intx and uintx are the 'extended' int and 'extended' unsigned int types;
255 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform.
257 typedef intptr_t intx;
258 typedef uintptr_t uintx;
260 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1);
261 const intx max_intx = (uintx)min_intx - 1;
262 const uintx max_uintx = (uintx)-1;
264 // Table of values:
265 // sizeof intx 4 8
266 // min_intx 0x80000000 0x8000000000000000
267 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF
268 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF
270 typedef unsigned int uint; NEEDS_CLEANUP
273 //----------------------------------------------------------------------------------------------------
274 // Java type definitions
276 // All kinds of 'plain' byte addresses
277 typedef signed char s_char;
278 typedef unsigned char u_char;
279 typedef u_char* address;
280 typedef uintptr_t address_word; // unsigned integer which will hold a pointer
281 // except for some implementations of a C++
282 // linkage pointer to function. Should never
283 // need one of those to be placed in this
284 // type anyway.
286 // Utility functions to "portably" (?) bit twiddle pointers
287 // Where portable means keep ANSI C++ compilers quiet
289 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); }
290 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); }
292 // Utility functions to "portably" make cast to/from function pointers.
294 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; }
295 inline address_word castable_address(address x) { return address_word(x) ; }
296 inline address_word castable_address(void* x) { return address_word(x) ; }
298 // Pointer subtraction.
299 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have
300 // the range we might need to find differences from one end of the heap
301 // to the other.
302 // A typical use might be:
303 // if (pointer_delta(end(), top()) >= size) {
304 // // enough room for an object of size
305 // ...
306 // and then additions like
307 // ... top() + size ...
308 // are safe because we know that top() is at least size below end().
309 inline size_t pointer_delta(const void* left,
310 const void* right,
311 size_t element_size) {
312 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size;
313 }
314 // A version specialized for HeapWord*'s.
315 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) {
316 return pointer_delta(left, right, sizeof(HeapWord));
317 }
318 // A version specialized for MetaWord*'s.
319 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) {
320 return pointer_delta(left, right, sizeof(MetaWord));
321 }
323 //
324 // ANSI C++ does not allow casting from one pointer type to a function pointer
325 // directly without at best a warning. This macro accomplishes it silently
326 // In every case that is present at this point the value be cast is a pointer
327 // to a C linkage function. In somecase the type used for the cast reflects
328 // that linkage and a picky compiler would not complain. In other cases because
329 // there is no convenient place to place a typedef with extern C linkage (i.e
330 // a platform dependent header file) it doesn't. At this point no compiler seems
331 // picky enough to catch these instances (which are few). It is possible that
332 // using templates could fix these for all cases. This use of templates is likely
333 // so far from the middle of the road that it is likely to be problematic in
334 // many C++ compilers.
335 //
336 #define CAST_TO_FN_PTR(func_type, value) ((func_type)(castable_address(value)))
337 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr)))
339 // Unsigned byte types for os and stream.hpp
341 // Unsigned one, two, four and eigth byte quantities used for describing
342 // the .class file format. See JVM book chapter 4.
344 typedef jubyte u1;
345 typedef jushort u2;
346 typedef juint u4;
347 typedef julong u8;
349 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte
350 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort
351 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint
352 const julong max_julong = (julong)-1; // 0xFF....FF largest julong
354 typedef jbyte s1;
355 typedef jshort s2;
356 typedef jint s4;
357 typedef jlong s8;
359 //----------------------------------------------------------------------------------------------------
360 // JVM spec restrictions
362 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134)
364 // Default ProtectionDomainCacheSize values
366 const int defaultProtectionDomainCacheSize = NOT_LP64(137) LP64_ONLY(2017);
368 //----------------------------------------------------------------------------------------------------
369 // Default and minimum StringTableSize values
371 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013);
372 const int minimumStringTableSize = 1009;
374 const int defaultSymbolTableSize = 20011;
375 const int minimumSymbolTableSize = 1009;
378 //----------------------------------------------------------------------------------------------------
379 // HotSwap - for JVMTI aka Class File Replacement and PopFrame
380 //
381 // Determines whether on-the-fly class replacement and frame popping are enabled.
383 #define HOTSWAP
385 //----------------------------------------------------------------------------------------------------
386 // Object alignment, in units of HeapWords.
387 //
388 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and
389 // reference fields can be naturally aligned.
391 extern int MinObjAlignment;
392 extern int MinObjAlignmentInBytes;
393 extern int MinObjAlignmentInBytesMask;
395 extern int LogMinObjAlignment;
396 extern int LogMinObjAlignmentInBytes;
398 const int LogKlassAlignmentInBytes = 3;
399 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize;
400 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes;
401 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize;
403 // Klass encoding metaspace max size
404 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes;
406 // Machine dependent stuff
408 #if defined(X86) && defined(COMPILER2) && !defined(JAVASE_EMBEDDED)
409 // Include Restricted Transactional Memory lock eliding optimization
410 #define INCLUDE_RTM_OPT 1
411 #define RTM_OPT_ONLY(code) code
412 #else
413 #define INCLUDE_RTM_OPT 0
414 #define RTM_OPT_ONLY(code)
415 #endif
416 // States of Restricted Transactional Memory usage.
417 enum RTMState {
418 NoRTM = 0x2, // Don't use RTM
419 UseRTM = 0x1, // Use RTM
420 ProfileRTM = 0x0 // Use RTM with abort ratio calculation
421 };
423 #ifdef TARGET_ARCH_x86
424 # include "globalDefinitions_x86.hpp"
425 #endif
426 #ifdef TARGET_ARCH_sparc
427 # include "globalDefinitions_sparc.hpp"
428 #endif
429 #ifdef TARGET_ARCH_zero
430 # include "globalDefinitions_zero.hpp"
431 #endif
432 #ifdef TARGET_ARCH_arm
433 # include "globalDefinitions_arm.hpp"
434 #endif
435 #ifdef TARGET_ARCH_ppc
436 # include "globalDefinitions_ppc.hpp"
437 #endif
438 #ifdef TARGET_ARCH_mips
439 # include "globalDefinitions_mips.hpp"
440 #endif
442 /*
443 * If a platform does not support native stack walking
444 * the platform specific globalDefinitions (above)
445 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0
446 */
447 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED
448 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1
449 #endif
451 // To assure the IRIW property on processors that are not multiple copy
452 // atomic, sync instructions must be issued between volatile reads to
453 // assure their ordering, instead of after volatile stores.
454 // (See "A Tutorial Introduction to the ARM and POWER Relaxed Memory Models"
455 // by Luc Maranget, Susmit Sarkar and Peter Sewell, INRIA/Cambridge)
456 #ifdef CPU_NOT_MULTIPLE_COPY_ATOMIC
457 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = true;
458 #else
459 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = false;
460 #endif
462 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348.
463 // Note: this value must be a power of 2
465 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord)
467 // Signed variants of alignment helpers. There are two versions of each, a macro
468 // for use in places like enum definitions that require compile-time constant
469 // expressions and a function for all other places so as to get type checking.
471 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1))
473 inline bool is_size_aligned(size_t size, size_t alignment) {
474 return align_size_up_(size, alignment) == size;
475 }
477 inline bool is_ptr_aligned(void* ptr, size_t alignment) {
478 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr;
479 }
481 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) {
482 return align_size_up_(size, alignment);
483 }
485 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1))
487 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) {
488 return align_size_down_(size, alignment);
489 }
491 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment)))
493 inline void* align_ptr_up(void* ptr, size_t alignment) {
494 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment);
495 }
497 inline void* align_ptr_down(void* ptr, size_t alignment) {
498 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment);
499 }
501 // Align objects by rounding up their size, in HeapWord units.
503 #define align_object_size_(size) align_size_up_(size, MinObjAlignment)
505 inline intptr_t align_object_size(intptr_t size) {
506 return align_size_up(size, MinObjAlignment);
507 }
509 inline bool is_object_aligned(intptr_t addr) {
510 return addr == align_object_size(addr);
511 }
513 // Pad out certain offsets to jlong alignment, in HeapWord units.
515 inline intptr_t align_object_offset(intptr_t offset) {
516 return align_size_up(offset, HeapWordsPerLong);
517 }
519 inline void* align_pointer_up(const void* addr, size_t size) {
520 return (void*) align_size_up_((uintptr_t)addr, size);
521 }
523 // Align down with a lower bound. If the aligning results in 0, return 'alignment'.
525 inline size_t align_size_down_bounded(size_t size, size_t alignment) {
526 size_t aligned_size = align_size_down_(size, alignment);
527 return aligned_size > 0 ? aligned_size : alignment;
528 }
530 // Clamp an address to be within a specific page
531 // 1. If addr is on the page it is returned as is
532 // 2. If addr is above the page_address the start of the *next* page will be returned
533 // 3. Otherwise, if addr is below the page_address the start of the page will be returned
534 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) {
535 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) {
536 // address is in the specified page, just return it as is
537 return addr;
538 } else if (addr > page_address) {
539 // address is above specified page, return start of next page
540 return (address)align_size_down(intptr_t(page_address), page_size) + page_size;
541 } else {
542 // address is below specified page, return start of page
543 return (address)align_size_down(intptr_t(page_address), page_size);
544 }
545 }
548 // The expected size in bytes of a cache line, used to pad data structures.
549 #define DEFAULT_CACHE_LINE_SIZE 64
552 //----------------------------------------------------------------------------------------------------
553 // Utility macros for compilers
554 // used to silence compiler warnings
556 #define Unused_Variable(var) var
559 //----------------------------------------------------------------------------------------------------
560 // Miscellaneous
562 // 6302670 Eliminate Hotspot __fabsf dependency
563 // All fabs() callers should call this function instead, which will implicitly
564 // convert the operand to double, avoiding a dependency on __fabsf which
565 // doesn't exist in early versions of Solaris 8.
566 inline double fabsd(double value) {
567 return fabs(value);
568 }
570 //----------------------------------------------------------------------------------------------------
571 // Special casts
572 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern
573 typedef union {
574 jfloat f;
575 jint i;
576 } FloatIntConv;
578 typedef union {
579 jdouble d;
580 jlong l;
581 julong ul;
582 } DoubleLongConv;
584 inline jint jint_cast (jfloat x) { return ((FloatIntConv*)&x)->i; }
585 inline jfloat jfloat_cast (jint x) { return ((FloatIntConv*)&x)->f; }
587 inline jlong jlong_cast (jdouble x) { return ((DoubleLongConv*)&x)->l; }
588 inline julong julong_cast (jdouble x) { return ((DoubleLongConv*)&x)->ul; }
589 inline jdouble jdouble_cast (jlong x) { return ((DoubleLongConv*)&x)->d; }
591 inline jint low (jlong value) { return jint(value); }
592 inline jint high(jlong value) { return jint(value >> 32); }
594 // the fancy casts are a hopefully portable way
595 // to do unsigned 32 to 64 bit type conversion
596 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32;
597 *value |= (jlong)(julong)(juint)low; }
599 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff;
600 *value |= (jlong)high << 32; }
602 inline jlong jlong_from(jint h, jint l) {
603 jlong result = 0; // initialization to avoid warning
604 set_high(&result, h);
605 set_low(&result, l);
606 return result;
607 }
609 union jlong_accessor {
610 jint words[2];
611 jlong long_value;
612 };
614 void basic_types_init(); // cannot define here; uses assert
617 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
618 enum BasicType {
619 T_BOOLEAN = 4,
620 T_CHAR = 5,
621 T_FLOAT = 6,
622 T_DOUBLE = 7,
623 T_BYTE = 8,
624 T_SHORT = 9,
625 T_INT = 10,
626 T_LONG = 11,
627 T_OBJECT = 12,
628 T_ARRAY = 13,
629 T_VOID = 14,
630 T_ADDRESS = 15,
631 T_NARROWOOP = 16,
632 T_METADATA = 17,
633 T_NARROWKLASS = 18,
634 T_CONFLICT = 19, // for stack value type with conflicting contents
635 T_ILLEGAL = 99
636 };
638 inline bool is_java_primitive(BasicType t) {
639 return T_BOOLEAN <= t && t <= T_LONG;
640 }
642 inline bool is_subword_type(BasicType t) {
643 // these guys are processed exactly like T_INT in calling sequences:
644 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT);
645 }
647 inline bool is_signed_subword_type(BasicType t) {
648 return (t == T_BYTE || t == T_SHORT);
649 }
651 // Convert a char from a classfile signature to a BasicType
652 inline BasicType char2type(char c) {
653 switch( c ) {
654 case 'B': return T_BYTE;
655 case 'C': return T_CHAR;
656 case 'D': return T_DOUBLE;
657 case 'F': return T_FLOAT;
658 case 'I': return T_INT;
659 case 'J': return T_LONG;
660 case 'S': return T_SHORT;
661 case 'Z': return T_BOOLEAN;
662 case 'V': return T_VOID;
663 case 'L': return T_OBJECT;
664 case '[': return T_ARRAY;
665 }
666 return T_ILLEGAL;
667 }
669 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
670 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; }
671 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements
672 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar
673 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; }
674 extern BasicType name2type(const char* name);
676 // Auxilary math routines
677 // least common multiple
678 extern size_t lcm(size_t a, size_t b);
681 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java
682 enum BasicTypeSize {
683 T_BOOLEAN_size = 1,
684 T_CHAR_size = 1,
685 T_FLOAT_size = 1,
686 T_DOUBLE_size = 2,
687 T_BYTE_size = 1,
688 T_SHORT_size = 1,
689 T_INT_size = 1,
690 T_LONG_size = 2,
691 T_OBJECT_size = 1,
692 T_ARRAY_size = 1,
693 T_NARROWOOP_size = 1,
694 T_NARROWKLASS_size = 1,
695 T_VOID_size = 0
696 };
699 // maps a BasicType to its instance field storage type:
700 // all sub-word integral types are widened to T_INT
701 extern BasicType type2field[T_CONFLICT+1];
702 extern BasicType type2wfield[T_CONFLICT+1];
705 // size in bytes
706 enum ArrayElementSize {
707 T_BOOLEAN_aelem_bytes = 1,
708 T_CHAR_aelem_bytes = 2,
709 T_FLOAT_aelem_bytes = 4,
710 T_DOUBLE_aelem_bytes = 8,
711 T_BYTE_aelem_bytes = 1,
712 T_SHORT_aelem_bytes = 2,
713 T_INT_aelem_bytes = 4,
714 T_LONG_aelem_bytes = 8,
715 #ifdef _LP64
716 T_OBJECT_aelem_bytes = 8,
717 T_ARRAY_aelem_bytes = 8,
718 #else
719 T_OBJECT_aelem_bytes = 4,
720 T_ARRAY_aelem_bytes = 4,
721 #endif
722 T_NARROWOOP_aelem_bytes = 4,
723 T_NARROWKLASS_aelem_bytes = 4,
724 T_VOID_aelem_bytes = 0
725 };
727 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element
728 #ifdef ASSERT
729 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts
730 #else
731 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; }
732 #endif
735 // JavaValue serves as a container for arbitrary Java values.
737 class JavaValue {
739 public:
740 typedef union JavaCallValue {
741 jfloat f;
742 jdouble d;
743 jint i;
744 jlong l;
745 jobject h;
746 } JavaCallValue;
748 private:
749 BasicType _type;
750 JavaCallValue _value;
752 public:
753 JavaValue(BasicType t = T_ILLEGAL) { _type = t; }
755 JavaValue(jfloat value) {
756 _type = T_FLOAT;
757 _value.f = value;
758 }
760 JavaValue(jdouble value) {
761 _type = T_DOUBLE;
762 _value.d = value;
763 }
765 jfloat get_jfloat() const { return _value.f; }
766 jdouble get_jdouble() const { return _value.d; }
767 jint get_jint() const { return _value.i; }
768 jlong get_jlong() const { return _value.l; }
769 jobject get_jobject() const { return _value.h; }
770 JavaCallValue* get_value_addr() { return &_value; }
771 BasicType get_type() const { return _type; }
773 void set_jfloat(jfloat f) { _value.f = f;}
774 void set_jdouble(jdouble d) { _value.d = d;}
775 void set_jint(jint i) { _value.i = i;}
776 void set_jlong(jlong l) { _value.l = l;}
777 void set_jobject(jobject h) { _value.h = h;}
778 void set_type(BasicType t) { _type = t; }
780 jboolean get_jboolean() const { return (jboolean) (_value.i);}
781 jbyte get_jbyte() const { return (jbyte) (_value.i);}
782 jchar get_jchar() const { return (jchar) (_value.i);}
783 jshort get_jshort() const { return (jshort) (_value.i);}
785 };
788 #define STACK_BIAS 0
789 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff
790 // in order to extend the reach of the stack pointer.
791 #if defined(SPARC) && defined(_LP64)
792 #undef STACK_BIAS
793 #define STACK_BIAS 0x7ff
794 #endif
797 // TosState describes the top-of-stack state before and after the execution of
798 // a bytecode or method. The top-of-stack value may be cached in one or more CPU
799 // registers. The TosState corresponds to the 'machine represention' of this cached
800 // value. There's 4 states corresponding to the JAVA types int, long, float & double
801 // as well as a 5th state in case the top-of-stack value is actually on the top
802 // of stack (in memory) and thus not cached. The atos state corresponds to the itos
803 // state when it comes to machine representation but is used separately for (oop)
804 // type specific operations (e.g. verification code).
806 enum TosState { // describes the tos cache contents
807 btos = 0, // byte, bool tos cached
808 ztos = 1, // byte, bool tos cached
809 ctos = 2, // char tos cached
810 stos = 3, // short tos cached
811 itos = 4, // int tos cached
812 ltos = 5, // long tos cached
813 ftos = 6, // float tos cached
814 dtos = 7, // double tos cached
815 atos = 8, // object cached
816 vtos = 9, // tos not cached
817 number_of_states,
818 ilgl // illegal state: should not occur
819 };
822 inline TosState as_TosState(BasicType type) {
823 switch (type) {
824 case T_BYTE : return btos;
825 case T_BOOLEAN: return ztos;
826 case T_CHAR : return ctos;
827 case T_SHORT : return stos;
828 case T_INT : return itos;
829 case T_LONG : return ltos;
830 case T_FLOAT : return ftos;
831 case T_DOUBLE : return dtos;
832 case T_VOID : return vtos;
833 case T_ARRAY : // fall through
834 case T_OBJECT : return atos;
835 }
836 return ilgl;
837 }
839 inline BasicType as_BasicType(TosState state) {
840 switch (state) {
841 case btos : return T_BYTE;
842 case ztos : return T_BOOLEAN;
843 case ctos : return T_CHAR;
844 case stos : return T_SHORT;
845 case itos : return T_INT;
846 case ltos : return T_LONG;
847 case ftos : return T_FLOAT;
848 case dtos : return T_DOUBLE;
849 case atos : return T_OBJECT;
850 case vtos : return T_VOID;
851 }
852 return T_ILLEGAL;
853 }
856 // Helper function to convert BasicType info into TosState
857 // Note: Cannot define here as it uses global constant at the time being.
858 TosState as_TosState(BasicType type);
861 // JavaThreadState keeps track of which part of the code a thread is executing in. This
862 // information is needed by the safepoint code.
863 //
864 // There are 4 essential states:
865 //
866 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code)
867 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles
868 // _thread_in_vm : Executing in the vm
869 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub)
870 //
871 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in
872 // a transition from one state to another. These extra states makes it possible for the safepoint code to
873 // handle certain thread_states without having to suspend the thread - making the safepoint code faster.
874 //
875 // Given a state, the xxx_trans state can always be found by adding 1.
876 //
877 enum JavaThreadState {
878 _thread_uninitialized = 0, // should never happen (missing initialization)
879 _thread_new = 2, // just starting up, i.e., in process of being initialized
880 _thread_new_trans = 3, // corresponding transition state (not used, included for completness)
881 _thread_in_native = 4, // running in native code
882 _thread_in_native_trans = 5, // corresponding transition state
883 _thread_in_vm = 6, // running in VM
884 _thread_in_vm_trans = 7, // corresponding transition state
885 _thread_in_Java = 8, // running in Java or in stub code
886 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness)
887 _thread_blocked = 10, // blocked in vm
888 _thread_blocked_trans = 11, // corresponding transition state
889 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation
890 };
893 // Handy constants for deciding which compiler mode to use.
894 enum MethodCompilation {
895 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation
896 InvalidOSREntryBci = -2
897 };
899 // Enumeration to distinguish tiers of compilation
900 enum CompLevel {
901 CompLevel_any = -1,
902 CompLevel_all = -1,
903 CompLevel_none = 0, // Interpreter
904 CompLevel_simple = 1, // C1
905 CompLevel_limited_profile = 2, // C1, invocation & backedge counters
906 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo
907 CompLevel_full_optimization = 4, // C2 or Shark
909 #if defined(COMPILER2) || defined(SHARK)
910 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered
911 #elif defined(COMPILER1)
912 CompLevel_highest_tier = CompLevel_simple, // pure C1
913 #else
914 CompLevel_highest_tier = CompLevel_none,
915 #endif
917 #if defined(TIERED)
918 CompLevel_initial_compile = CompLevel_full_profile // tiered
919 #elif defined(COMPILER1)
920 CompLevel_initial_compile = CompLevel_simple // pure C1
921 #elif defined(COMPILER2) || defined(SHARK)
922 CompLevel_initial_compile = CompLevel_full_optimization // pure C2
923 #else
924 CompLevel_initial_compile = CompLevel_none
925 #endif
926 };
928 inline bool is_c1_compile(int comp_level) {
929 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization;
930 }
932 inline bool is_c2_compile(int comp_level) {
933 return comp_level == CompLevel_full_optimization;
934 }
936 inline bool is_highest_tier_compile(int comp_level) {
937 return comp_level == CompLevel_highest_tier;
938 }
940 inline bool is_compile(int comp_level) {
941 return is_c1_compile(comp_level) || is_c2_compile(comp_level);
942 }
944 //----------------------------------------------------------------------------------------------------
945 // 'Forward' declarations of frequently used classes
946 // (in order to reduce interface dependencies & reduce
947 // number of unnecessary compilations after changes)
949 class symbolTable;
950 class ClassFileStream;
952 class Event;
954 class Thread;
955 class VMThread;
956 class JavaThread;
957 class Threads;
959 class VM_Operation;
960 class VMOperationQueue;
962 class CodeBlob;
963 class nmethod;
964 class OSRAdapter;
965 class I2CAdapter;
966 class C2IAdapter;
967 class CompiledIC;
968 class relocInfo;
969 class ScopeDesc;
970 class PcDesc;
972 class Recompiler;
973 class Recompilee;
974 class RecompilationPolicy;
975 class RFrame;
976 class CompiledRFrame;
977 class InterpretedRFrame;
979 class frame;
981 class vframe;
982 class javaVFrame;
983 class interpretedVFrame;
984 class compiledVFrame;
985 class deoptimizedVFrame;
986 class externalVFrame;
987 class entryVFrame;
989 class RegisterMap;
991 class Mutex;
992 class Monitor;
993 class BasicLock;
994 class BasicObjectLock;
996 class PeriodicTask;
998 class JavaCallWrapper;
1000 class oopDesc;
1001 class metaDataOopDesc;
1003 class NativeCall;
1005 class zone;
1007 class StubQueue;
1009 class outputStream;
1011 class ResourceArea;
1013 class DebugInformationRecorder;
1014 class ScopeValue;
1015 class CompressedStream;
1016 class DebugInfoReadStream;
1017 class DebugInfoWriteStream;
1018 class LocationValue;
1019 class ConstantValue;
1020 class IllegalValue;
1022 class PrivilegedElement;
1023 class MonitorArray;
1025 class MonitorInfo;
1027 class OffsetClosure;
1028 class OopMapCache;
1029 class InterpreterOopMap;
1030 class OopMapCacheEntry;
1031 class OSThread;
1033 typedef int (*OSThreadStartFunc)(void*);
1035 class Space;
1037 class JavaValue;
1038 class methodHandle;
1039 class JavaCallArguments;
1041 // Basic support for errors (general debug facilities not defined at this point fo the include phase)
1043 extern void basic_fatal(const char* msg);
1046 //----------------------------------------------------------------------------------------------------
1047 // Special constants for debugging
1049 const jint badInt = -3; // generic "bad int" value
1050 const intptr_t badAddressVal = -2; // generic "bad address" value
1051 const intptr_t badOopVal = -1; // generic "bad oop" value
1052 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC
1053 const int badHandleValue = 0xBC; // value used to zap vm handle area
1054 const int badResourceValue = 0xAB; // value used to zap resource area
1055 const int freeBlockPad = 0xBA; // value used to pad freed blocks.
1056 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks.
1057 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area
1058 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC
1059 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC
1060 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation
1061 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation
1064 // (These must be implemented as #defines because C++ compilers are
1065 // not obligated to inline non-integral constants!)
1066 #define badAddress ((address)::badAddressVal)
1067 #define badOop (cast_to_oop(::badOopVal))
1068 #define badHeapWord (::badHeapWordVal)
1069 #define badJNIHandle (cast_to_oop(::badJNIHandleVal))
1071 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit)
1072 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17))
1074 //----------------------------------------------------------------------------------------------------
1075 // Utility functions for bitfield manipulations
1077 const intptr_t AllBits = ~0; // all bits set in a word
1078 const intptr_t NoBits = 0; // no bits set in a word
1079 const jlong NoLongBits = 0; // no bits set in a long
1080 const intptr_t OneBit = 1; // only right_most bit set in a word
1082 // get a word with the n.th or the right-most or left-most n bits set
1083 // (note: #define used only so that they can be used in enum constant definitions)
1084 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n))
1085 #define right_n_bits(n) (nth_bit(n) - 1)
1086 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n)))
1088 // bit-operations using a mask m
1089 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; }
1090 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; }
1091 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; }
1092 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; }
1093 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; }
1095 // bit-operations using the n.th bit
1096 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); }
1097 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); }
1098 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; }
1100 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!)
1101 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) {
1102 return mask_bits(x >> start_bit_no, right_n_bits(field_length));
1103 }
1106 //----------------------------------------------------------------------------------------------------
1107 // Utility functions for integers
1109 // Avoid use of global min/max macros which may cause unwanted double
1110 // evaluation of arguments.
1111 #ifdef max
1112 #undef max
1113 #endif
1115 #ifdef min
1116 #undef min
1117 #endif
1119 #define max(a,b) Do_not_use_max_use_MAX2_instead
1120 #define min(a,b) Do_not_use_min_use_MIN2_instead
1122 // It is necessary to use templates here. Having normal overloaded
1123 // functions does not work because it is necessary to provide both 32-
1124 // and 64-bit overloaded functions, which does not work, and having
1125 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L)
1126 // will be even more error-prone than macros.
1127 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; }
1128 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; }
1129 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); }
1130 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); }
1131 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); }
1132 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); }
1134 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; }
1136 // true if x is a power of 2, false otherwise
1137 inline bool is_power_of_2(intptr_t x) {
1138 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits));
1139 }
1141 // long version of is_power_of_2
1142 inline bool is_power_of_2_long(jlong x) {
1143 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits));
1144 }
1146 //* largest i such that 2^i <= x
1147 // A negative value of 'x' will return '31'
1148 inline int log2_intptr(intptr_t x) {
1149 int i = -1;
1150 uintptr_t p = 1;
1151 while (p != 0 && p <= (uintptr_t)x) {
1152 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1153 i++; p *= 2;
1154 }
1155 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1156 // (if p = 0 then overflow occurred and i = 31)
1157 return i;
1158 }
1160 //* largest i such that 2^i <= x
1161 // A negative value of 'x' will return '63'
1162 inline int log2_long(jlong x) {
1163 int i = -1;
1164 julong p = 1;
1165 while (p != 0 && p <= (julong)x) {
1166 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x)
1167 i++; p *= 2;
1168 }
1169 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1))
1170 // (if p = 0 then overflow occurred and i = 63)
1171 return i;
1172 }
1174 //* the argument must be exactly a power of 2
1175 inline int exact_log2(intptr_t x) {
1176 #ifdef ASSERT
1177 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2");
1178 #endif
1179 return log2_intptr(x);
1180 }
1182 //* the argument must be exactly a power of 2
1183 inline int exact_log2_long(jlong x) {
1184 #ifdef ASSERT
1185 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2");
1186 #endif
1187 return log2_long(x);
1188 }
1191 // returns integer round-up to the nearest multiple of s (s must be a power of two)
1192 inline intptr_t round_to(intptr_t x, uintx s) {
1193 #ifdef ASSERT
1194 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1195 #endif
1196 const uintx m = s - 1;
1197 return mask_bits(x + m, ~m);
1198 }
1200 // returns integer round-down to the nearest multiple of s (s must be a power of two)
1201 inline intptr_t round_down(intptr_t x, uintx s) {
1202 #ifdef ASSERT
1203 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2");
1204 #endif
1205 const uintx m = s - 1;
1206 return mask_bits(x, ~m);
1207 }
1210 inline bool is_odd (intx x) { return x & 1; }
1211 inline bool is_even(intx x) { return !is_odd(x); }
1213 // "to" should be greater than "from."
1214 inline intx byte_size(void* from, void* to) {
1215 return (address)to - (address)from;
1216 }
1218 //----------------------------------------------------------------------------------------------------
1219 // Avoid non-portable casts with these routines (DEPRECATED)
1221 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE
1222 // Bytes is optimized machine-specifically and may be much faster then the portable routines below.
1224 // Given sequence of four bytes, build into a 32-bit word
1225 // following the conventions used in class files.
1226 // On the 386, this could be realized with a simple address cast.
1227 //
1229 // This routine takes eight bytes:
1230 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1231 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 ))
1232 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 ))
1233 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 ))
1234 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 ))
1235 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 ))
1236 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 ))
1237 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 ))
1238 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 ));
1239 }
1241 // This routine takes four bytes:
1242 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1243 return (( u4(c1) << 24 ) & 0xff000000)
1244 | (( u4(c2) << 16 ) & 0x00ff0000)
1245 | (( u4(c3) << 8 ) & 0x0000ff00)
1246 | (( u4(c4) << 0 ) & 0x000000ff);
1247 }
1249 // And this one works if the four bytes are contiguous in memory:
1250 inline u4 build_u4_from( u1* p ) {
1251 return build_u4_from( p[0], p[1], p[2], p[3] );
1252 }
1254 // Ditto for two-byte ints:
1255 inline u2 build_u2_from( u1 c1, u1 c2 ) {
1256 return u2((( u2(c1) << 8 ) & 0xff00)
1257 | (( u2(c2) << 0 ) & 0x00ff));
1258 }
1260 // And this one works if the two bytes are contiguous in memory:
1261 inline u2 build_u2_from( u1* p ) {
1262 return build_u2_from( p[0], p[1] );
1263 }
1265 // Ditto for floats:
1266 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) {
1267 u4 u = build_u4_from( c1, c2, c3, c4 );
1268 return *(jfloat*)&u;
1269 }
1271 inline jfloat build_float_from( u1* p ) {
1272 u4 u = build_u4_from( p );
1273 return *(jfloat*)&u;
1274 }
1277 // now (64-bit) longs
1279 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1280 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 ))
1281 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 ))
1282 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 ))
1283 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 ))
1284 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 ))
1285 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 ))
1286 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 ))
1287 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 ));
1288 }
1290 inline jlong build_long_from( u1* p ) {
1291 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] );
1292 }
1295 // Doubles, too!
1296 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) {
1297 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 );
1298 return *(jdouble*)&u;
1299 }
1301 inline jdouble build_double_from( u1* p ) {
1302 jlong u = build_long_from( p );
1303 return *(jdouble*)&u;
1304 }
1307 // Portable routines to go the other way:
1309 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) {
1310 c1 = u1(x >> 8);
1311 c2 = u1(x);
1312 }
1314 inline void explode_short_to( u2 x, u1* p ) {
1315 explode_short_to( x, p[0], p[1]);
1316 }
1318 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) {
1319 c1 = u1(x >> 24);
1320 c2 = u1(x >> 16);
1321 c3 = u1(x >> 8);
1322 c4 = u1(x);
1323 }
1325 inline void explode_int_to( u4 x, u1* p ) {
1326 explode_int_to( x, p[0], p[1], p[2], p[3]);
1327 }
1330 // Pack and extract shorts to/from ints:
1332 inline int extract_low_short_from_int(jint x) {
1333 return x & 0xffff;
1334 }
1336 inline int extract_high_short_from_int(jint x) {
1337 return (x >> 16) & 0xffff;
1338 }
1340 inline int build_int_from_shorts( jushort low, jushort high ) {
1341 return ((int)((unsigned int)high << 16) | (unsigned int)low);
1342 }
1344 // Convert pointer to intptr_t, for use in printing pointers.
1345 inline intptr_t p2i(const void * p) {
1346 return (intptr_t) p;
1347 }
1349 // Printf-style formatters for fixed- and variable-width types as pointers and
1350 // integers. These are derived from the definitions in inttypes.h. If the platform
1351 // doesn't provide appropriate definitions, they should be provided in
1352 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp)
1354 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false")
1356 // Format 32-bit quantities.
1357 #define INT32_FORMAT "%" PRId32
1358 #define UINT32_FORMAT "%" PRIu32
1359 #define INT32_FORMAT_W(width) "%" #width PRId32
1360 #define UINT32_FORMAT_W(width) "%" #width PRIu32
1362 #define PTR32_FORMAT "0x%08" PRIx32
1364 // Format 64-bit quantities.
1365 #define INT64_FORMAT "%" PRId64
1366 #define UINT64_FORMAT "%" PRIu64
1367 #define UINT64_FORMAT_X "%" PRIx64
1368 #define INT64_FORMAT_W(width) "%" #width PRId64
1369 #define UINT64_FORMAT_W(width) "%" #width PRIu64
1371 #define PTR64_FORMAT "0x%016" PRIx64
1373 // Format jlong, if necessary
1374 #ifndef JLONG_FORMAT
1375 #define JLONG_FORMAT INT64_FORMAT
1376 #endif
1377 #ifndef JULONG_FORMAT
1378 #define JULONG_FORMAT UINT64_FORMAT
1379 #endif
1381 // Format pointers which change size between 32- and 64-bit.
1382 #ifdef _LP64
1383 #define INTPTR_FORMAT "0x%016" PRIxPTR
1384 #define PTR_FORMAT "0x%016" PRIxPTR
1385 #else // !_LP64
1386 #define INTPTR_FORMAT "0x%08" PRIxPTR
1387 #define PTR_FORMAT "0x%08" PRIxPTR
1388 #endif // _LP64
1390 #define INTPTR_FORMAT_W(width) "%" #width PRIxPTR
1392 #define SSIZE_FORMAT "%" PRIdPTR
1393 #define SIZE_FORMAT "%" PRIuPTR
1394 #define SIZE_FORMAT_HEX "0x%" PRIxPTR
1395 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR
1396 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR
1397 #define SIZE_FORMAT_HEX_W(width) "0x%" #width PRIxPTR
1399 #define INTX_FORMAT "%" PRIdPTR
1400 #define UINTX_FORMAT "%" PRIuPTR
1401 #define INTX_FORMAT_W(width) "%" #width PRIdPTR
1402 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR
1405 // Enable zap-a-lot if in debug version.
1407 # ifdef ASSERT
1408 # ifdef COMPILER2
1409 # define ENABLE_ZAP_DEAD_LOCALS
1410 #endif /* COMPILER2 */
1411 # endif /* ASSERT */
1413 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0]))
1415 // Dereference vptr
1416 // All C++ compilers that we know of have the vtbl pointer in the first
1417 // word. If there are exceptions, this function needs to be made compiler
1418 // specific.
1419 static inline void* dereference_vptr(const void* addr) {
1420 return *(void**)addr;
1421 }
1423 #ifndef PRODUCT
1425 // For unit testing only
1426 class GlobalDefinitions {
1427 public:
1428 static void test_globals();
1429 };
1431 #endif // PRODUCT
1433 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP