jdk8-mips64-public/hotspot: src/share/vm/utilities/globalDefinitions.cpp@2d127394260e (annotated)

src/share/vm/utilities/globalDefinitions.cpp@2d127394260e (annotated)

src/share/vm/utilities/globalDefinitions.cpp

Thu, 27 May 2010 18:01:56 -0700

author: kvn
date: Thu, 27 May 2010 18:01:56 -0700
changeset 1926: 2d127394260e
parent 631: d1605aabd0a1
child 1934: e9ff18c4ace7
permissions: -rw-r--r--

6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
Summary: Added new product ObjectAlignmentInBytes flag to control object alignment.
Reviewed-by: twisti, ysr, iveresov

 /*
  * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 # include "incls/_precompiled.incl"
 # include "incls/_globalDefinitions.cpp.incl"
 // Basic error support
 // Info for oops within a java object.  Defaults are zero so
 // things will break badly if incorrectly initialized.
 int heapOopSize        = 0;
 int LogBytesPerHeapOop = 0;
 int LogBitsPerHeapOop  = 0;
 int BytesPerHeapOop    = 0;
 int BitsPerHeapOop     = 0;
 // Object alignment, in units of HeapWords.
 // Defaults are -1 so things will break badly if incorrectly initialized.
 int MinObjAlignment            = -1;
 int MinObjAlignmentInBytes     = -1;
 int MinObjAlignmentInBytesMask = 0;
 int LogMinObjAlignment         = -1;
 int LogMinObjAlignmentInBytes  = -1;
 // Oop encoding heap max
 uint64_t OopEncodingHeapMax = 0;
 void basic_fatal(const char* msg) {
   fatal(msg);
 }
 // Something to help porters sleep at night
 void basic_types_init() {
 #ifdef ASSERT
 #ifdef _LP64
   assert(min_intx ==  (intx)CONST64(0x8000000000000000), "correct constant");
   assert(max_intx ==  CONST64(0x7FFFFFFFFFFFFFFF), "correct constant");
   assert(max_uintx == CONST64(0xFFFFFFFFFFFFFFFF), "correct constant");
   assert( 8 == sizeof( intx),      "wrong size for basic type");
   assert( 8 == sizeof( jobject),   "wrong size for basic type");
 #else
   assert(min_intx ==  (intx)0x80000000,  "correct constant");
   assert(max_intx ==  0x7FFFFFFF,  "correct constant");
   assert(max_uintx == 0xFFFFFFFF,  "correct constant");
   assert( 4 == sizeof( intx),      "wrong size for basic type");
   assert( 4 == sizeof( jobject),   "wrong size for basic type");
 #endif
   assert( (~max_juint) == 0,  "max_juint has all its bits");
   assert( (~max_uintx) == 0,  "max_uintx has all its bits");
   assert( (~max_julong) == 0, "max_julong has all its bits");
   assert( 1 == sizeof( jbyte),     "wrong size for basic type");
   assert( 2 == sizeof( jchar),     "wrong size for basic type");
   assert( 2 == sizeof( jshort),    "wrong size for basic type");
   assert( 4 == sizeof( juint),     "wrong size for basic type");
   assert( 4 == sizeof( jint),      "wrong size for basic type");
   assert( 1 == sizeof( jboolean),  "wrong size for basic type");
   assert( 8 == sizeof( jlong),     "wrong size for basic type");
   assert( 4 == sizeof( jfloat),    "wrong size for basic type");
   assert( 8 == sizeof( jdouble),   "wrong size for basic type");
   assert( 1 == sizeof( u1),        "wrong size for basic type");
   assert( 2 == sizeof( u2),        "wrong size for basic type");
   assert( 4 == sizeof( u4),        "wrong size for basic type");
   int num_type_chars = 0;
   for (int i = 0; i < 99; i++) {
     if (type2char((BasicType)i) != 0) {
       assert(char2type(type2char((BasicType)i)) == i, "proper inverses");
       num_type_chars++;
     }
   }
   assert(num_type_chars == 11, "must have tested the right number of mappings");
   assert(char2type(0) == T_ILLEGAL, "correct illegality");
   {
     for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
       BasicType vt = (BasicType)i;
       BasicType ft = type2field[vt];
       switch (vt) {
       // the following types might plausibly show up in memory layouts:
       case T_BOOLEAN:
       case T_BYTE:
       case T_CHAR:
       case T_SHORT:
       case T_INT:
       case T_FLOAT:
       case T_DOUBLE:
       case T_LONG:
       case T_OBJECT:
       case T_ADDRESS:   // random raw pointer
       case T_NARROWOOP: // compressed pointer
       case T_CONFLICT:  // might as well support a bottom type
       case T_VOID:      // padding or other unaddressed word
         // layout type must map to itself
         assert(vt == ft, "");
         break;
       default:
         // non-layout type must map to a (different) layout type
         assert(vt != ft, "");
         assert(ft == type2field[ft], "");
       }
       // every type must map to same-sized layout type:
       assert(type2size[vt] == type2size[ft], "");
     }
   }
   // These are assumed, e.g., when filling HeapWords with juints.
   assert(is_power_of_2(sizeof(juint)), "juint must be power of 2");
   assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2");
   assert((size_t)HeapWordSize >= sizeof(juint),
          "HeapWord should be at least as large as juint");
   assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer");
 #endif
   if( JavaPriority1_To_OSPriority != -1 )
     os::java_to_os_priority[1] = JavaPriority1_To_OSPriority;
   if( JavaPriority2_To_OSPriority != -1 )
     os::java_to_os_priority[2] = JavaPriority2_To_OSPriority;
   if( JavaPriority3_To_OSPriority != -1 )
     os::java_to_os_priority[3] = JavaPriority3_To_OSPriority;
   if( JavaPriority4_To_OSPriority != -1 )
     os::java_to_os_priority[4] = JavaPriority4_To_OSPriority;
   if( JavaPriority5_To_OSPriority != -1 )
     os::java_to_os_priority[5] = JavaPriority5_To_OSPriority;
   if( JavaPriority6_To_OSPriority != -1 )
     os::java_to_os_priority[6] = JavaPriority6_To_OSPriority;
   if( JavaPriority7_To_OSPriority != -1 )
     os::java_to_os_priority[7] = JavaPriority7_To_OSPriority;
   if( JavaPriority8_To_OSPriority != -1 )
     os::java_to_os_priority[8] = JavaPriority8_To_OSPriority;
   if( JavaPriority9_To_OSPriority != -1 )
     os::java_to_os_priority[9] = JavaPriority9_To_OSPriority;
   if(JavaPriority10_To_OSPriority != -1 )
     os::java_to_os_priority[10] = JavaPriority10_To_OSPriority;
   // Set the size of basic types here (after argument parsing but before
   // stub generation).
   if (UseCompressedOops) {
     // Size info for oops within java objects is fixed
     heapOopSize        = jintSize;
     LogBytesPerHeapOop = LogBytesPerInt;
     LogBitsPerHeapOop  = LogBitsPerInt;
     BytesPerHeapOop    = BytesPerInt;
     BitsPerHeapOop     = BitsPerInt;
   } else {
     heapOopSize        = oopSize;
     LogBytesPerHeapOop = LogBytesPerWord;
     LogBitsPerHeapOop  = LogBitsPerWord;
     BytesPerHeapOop    = BytesPerWord;
     BitsPerHeapOop     = BitsPerWord;
   }
   _type2aelembytes[T_OBJECT] = heapOopSize;
   _type2aelembytes[T_ARRAY]  = heapOopSize;
 }
 // Map BasicType to signature character
 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0};
 // Map BasicType to Java type name
 const char* type2name_tab[T_CONFLICT+1] = {
   NULL, NULL, NULL, NULL,
   "boolean",
   "char",
   "float",
   "double",
   "byte",
   "short",
   "int",
   "long",
   "object",
   "array",
   "void",
   "*address*",
   "*narrowoop*",
   "*conflict*"
 };
 BasicType name2type(const char* name) {
   for (int i = T_BOOLEAN; i <= T_VOID; i++) {
     BasicType t = (BasicType)i;
     if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name))
       return t;
   }
   return T_ILLEGAL;
 }
 // Map BasicType to size in words
 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, -1};
 BasicType type2field[T_CONFLICT+1] = {
   (BasicType)0,            // 0,
   (BasicType)0,            // 1,
   (BasicType)0,            // 2,
   (BasicType)0,            // 3,
   T_BOOLEAN,               // T_BOOLEAN  =  4,
   T_CHAR,                  // T_CHAR     =  5,
   T_FLOAT,                 // T_FLOAT    =  6,
   T_DOUBLE,                // T_DOUBLE   =  7,
   T_BYTE,                  // T_BYTE     =  8,
   T_SHORT,                 // T_SHORT    =  9,
   T_INT,                   // T_INT      = 10,
   T_LONG,                  // T_LONG     = 11,
   T_OBJECT,                // T_OBJECT   = 12,
   T_OBJECT,                // T_ARRAY    = 13,
   T_VOID,                  // T_VOID     = 14,
   T_ADDRESS,               // T_ADDRESS  = 15,
   T_NARROWOOP,             // T_NARROWOOP= 16,
   T_CONFLICT               // T_CONFLICT = 17,
 };
 BasicType type2wfield[T_CONFLICT+1] = {
   (BasicType)0,            // 0,
   (BasicType)0,            // 1,
   (BasicType)0,            // 2,
   (BasicType)0,            // 3,
   T_INT,     // T_BOOLEAN  =  4,
   T_INT,     // T_CHAR     =  5,
   T_FLOAT,   // T_FLOAT    =  6,
   T_DOUBLE,  // T_DOUBLE   =  7,
   T_INT,     // T_BYTE     =  8,
   T_INT,     // T_SHORT    =  9,
   T_INT,     // T_INT      = 10,
   T_LONG,    // T_LONG     = 11,
   T_OBJECT,  // T_OBJECT   = 12,
   T_OBJECT,  // T_ARRAY    = 13,
   T_VOID,    // T_VOID     = 14,
   T_ADDRESS, // T_ADDRESS  = 15,
   T_NARROWOOP, // T_NARROWOOP  = 16,
   T_CONFLICT // T_CONFLICT = 17,
 };
 int _type2aelembytes[T_CONFLICT+1] = {
 ,                      // 0
 ,                      // 1
 ,                      // 2
 ,                      // 3
   T_BOOLEAN_aelem_bytes,  // T_BOOLEAN  =  4,
   T_CHAR_aelem_bytes,     // T_CHAR     =  5,
   T_FLOAT_aelem_bytes,    // T_FLOAT    =  6,
   T_DOUBLE_aelem_bytes,   // T_DOUBLE   =  7,
   T_BYTE_aelem_bytes,     // T_BYTE     =  8,
   T_SHORT_aelem_bytes,    // T_SHORT    =  9,
   T_INT_aelem_bytes,      // T_INT      = 10,
   T_LONG_aelem_bytes,     // T_LONG     = 11,
   T_OBJECT_aelem_bytes,   // T_OBJECT   = 12,
   T_ARRAY_aelem_bytes,    // T_ARRAY    = 13,
 ,                      // T_VOID     = 14,
   T_OBJECT_aelem_bytes,   // T_ADDRESS  = 15,
   T_NARROWOOP_aelem_bytes,// T_NARROWOOP= 16,
 // T_CONFLICT = 17,
 };
 #ifdef ASSERT
 int type2aelembytes(BasicType t, bool allow_address) {
   assert(allow_address || t != T_ADDRESS, " ");
   return _type2aelembytes[t];
 }
 #endif
 // Support for 64-bit integer arithmetic
 // The following code is mostly taken from JVM typedefs_md.h and system_md.c
 static const jlong high_bit   = (jlong)1 << (jlong)63;
 static const jlong other_bits = ~high_bit;
 jlong float2long(jfloat f) {
   jlong tmp = (jlong) f;
   if (tmp != high_bit) {
     return tmp;
   } else {
     if (g_isnan((jdouble)f)) {
       return 0;
     }
     if (f < 0) {
       return high_bit;
     } else {
       return other_bits;
     }
   }
 }
 jlong double2long(jdouble f) {
   jlong tmp = (jlong) f;
   if (tmp != high_bit) {
     return tmp;
   } else {
     if (g_isnan(f)) {
       return 0;
     }
     if (f < 0) {
       return high_bit;
     } else {
       return other_bits;
     }
   }
 }
 // least common multiple
 size_t lcm(size_t a, size_t b) {
     size_t cur, div, next;
     cur = MAX2(a, b);
     div = MIN2(a, b);
     assert(div != 0, "lcm requires positive arguments");
     while ((next = cur % div) != 0) {
         cur = div; div = next;
     }
     julong result = julong(a) * b / div;
     assert(result <= (size_t)max_uintx, "Integer overflow in lcm");
     return size_t(result);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/globalDefinitions.cpp@2d127394260e (annotated)

src/share/vm/utilities/globalDefinitions.cpp