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src/hotspot/share/gc/z/zAddress.inline.hpp

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   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 #ifndef SHARE_GC_Z_ZADDRESS_INLINE_HPP
  25 #define SHARE_GC_Z_ZADDRESS_INLINE_HPP
  26 
  27 #include "gc/z/zAddress.hpp"
  28 #include "gc/z/zGlobals.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 #include "utilities/macros.hpp"
  31 
  32 inline bool ZAddress::is_null(uintptr_t value) {
  33   return value == 0;
  34 }
  35 
  36 inline bool ZAddress::is_bad(uintptr_t value) {
  37   return value & ZAddressBadMask;
  38 }
  39 
  40 inline bool ZAddress::is_good(uintptr_t value) {
  41   return !is_bad(value) && !is_null(value);
  42 }
  43 
  44 inline bool ZAddress::is_good_or_null(uintptr_t value) {
  45   // Checking if an address is "not bad" is an optimized version of
  46   // checking if it's "good or null", which eliminates an explicit
  47   // null check. However, the implicit null check only checks that
  48   // the mask bits are zero, not that the entire address is zero.
  49   // This means that an address without mask bits would pass through


  63 }
  64 
  65 inline bool ZAddress::is_weak_good_or_null(uintptr_t value) {
  66   return !is_weak_bad(value);
  67 }
  68 
  69 inline bool ZAddress::is_marked(uintptr_t value) {
  70   return value & ZAddressMetadataMarked;
  71 }
  72 
  73 inline bool ZAddress::is_finalizable(uintptr_t value) {
  74   return value & ZAddressMetadataFinalizable;
  75 }
  76 
  77 inline bool ZAddress::is_finalizable_good(uintptr_t value) {
  78   return is_finalizable(value) && is_good(value ^ ZAddressMetadataFinalizable);
  79 }
  80 
  81 inline bool ZAddress::is_remapped(uintptr_t value) {
  82   return value & ZAddressMetadataRemapped;
  83 }
  84 
  85 inline bool ZAddress::is_in(uintptr_t value) {
  86   // Check that exactly one non-offset bit is set
  87   if (!is_power_of_2(value & ~ZAddressOffsetMask)) {
  88     return false;
  89   }
  90 
  91   // Check that one of the non-finalizable metadata is set
  92   return value & (ZAddressMetadataMask & ~ZAddressMetadataFinalizable);
  93 }
  94 
  95 inline uintptr_t ZAddress::address(uintptr_t value) {
  96   return value | ZAddressBase;
  97 }
  98 
  99 inline uintptr_t ZAddress::offset(uintptr_t value) {
 100   return value & ZAddressOffsetMask;
 101 }
 102 
 103 inline uintptr_t ZAddress::good(uintptr_t value) {
 104   return address(offset(value) | ZAddressGoodMask);
 105 }
 106 
 107 inline uintptr_t ZAddress::good_or_null(uintptr_t value) {
 108   return is_null(value) ? 0 : good(value);
 109 }
 110 
 111 inline uintptr_t ZAddress::finalizable_good(uintptr_t value) {
 112   return address(offset(value) | ZAddressMetadataFinalizable | ZAddressGoodMask);




   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 #ifndef SHARE_GC_Z_ZADDRESS_INLINE_HPP
  25 #define SHARE_GC_Z_ZADDRESS_INLINE_HPP
  26 
  27 #include "gc/z/zAddress.hpp"
  28 #include "gc/z/zGlobals.hpp"

  29 #include "utilities/macros.hpp"
  30 
  31 inline bool ZAddress::is_null(uintptr_t value) {
  32   return value == 0;
  33 }
  34 
  35 inline bool ZAddress::is_bad(uintptr_t value) {
  36   return value & ZAddressBadMask;
  37 }
  38 
  39 inline bool ZAddress::is_good(uintptr_t value) {
  40   return !is_bad(value) && !is_null(value);
  41 }
  42 
  43 inline bool ZAddress::is_good_or_null(uintptr_t value) {
  44   // Checking if an address is "not bad" is an optimized version of
  45   // checking if it's "good or null", which eliminates an explicit
  46   // null check. However, the implicit null check only checks that
  47   // the mask bits are zero, not that the entire address is zero.
  48   // This means that an address without mask bits would pass through


  62 }
  63 
  64 inline bool ZAddress::is_weak_good_or_null(uintptr_t value) {
  65   return !is_weak_bad(value);
  66 }
  67 
  68 inline bool ZAddress::is_marked(uintptr_t value) {
  69   return value & ZAddressMetadataMarked;
  70 }
  71 
  72 inline bool ZAddress::is_finalizable(uintptr_t value) {
  73   return value & ZAddressMetadataFinalizable;
  74 }
  75 
  76 inline bool ZAddress::is_finalizable_good(uintptr_t value) {
  77   return is_finalizable(value) && is_good(value ^ ZAddressMetadataFinalizable);
  78 }
  79 
  80 inline bool ZAddress::is_remapped(uintptr_t value) {
  81   return value & ZAddressMetadataRemapped;










  82 }
  83 
  84 inline uintptr_t ZAddress::address(uintptr_t value) {
  85   return value | ZAddressBase;
  86 }
  87 
  88 inline uintptr_t ZAddress::offset(uintptr_t value) {
  89   return value & ZAddressOffsetMask;
  90 }
  91 
  92 inline uintptr_t ZAddress::good(uintptr_t value) {
  93   return address(offset(value) | ZAddressGoodMask);
  94 }
  95 
  96 inline uintptr_t ZAddress::good_or_null(uintptr_t value) {
  97   return is_null(value) ? 0 : good(value);
  98 }
  99 
 100 inline uintptr_t ZAddress::finalizable_good(uintptr_t value) {
 101   return address(offset(value) | ZAddressMetadataFinalizable | ZAddressGoodMask);


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