jdk8-mips64-public/hotspot: src/share/vm/oops/markOop.inline.hpp@f95d63e2154a

6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg

     1 /*

     2  * Copyright (c) 2006, 2010, 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 #ifndef SHARE_VM_OOPS_MARKOOP_INLINE_HPP

    26 #define SHARE_VM_OOPS_MARKOOP_INLINE_HPP

    28 #include "oops/klass.hpp"

    29 #include "oops/klassOop.hpp"

    30 #include "oops/markOop.hpp"

    31 #include "runtime/globals.hpp"

    33 // Should this header be preserved during GC?

    34 inline bool markOopDesc::must_be_preserved_with_bias(oop obj_containing_mark) const {

    35   assert(UseBiasedLocking, "unexpected");

    36   if (has_bias_pattern()) {

    37     // Will reset bias at end of collection

    38     // Mark words of biased and currently locked objects are preserved separately

    39     return false;

    40   }

    41   markOop prototype_header = prototype_for_object(obj_containing_mark);

    42   if (prototype_header->has_bias_pattern()) {

    43     // Individual instance which has its bias revoked; must return

    44     // true for correctness

    45     return true;

    46   }

    47   return (!is_unlocked() || !has_no_hash());

    48 }

    50 inline bool markOopDesc::must_be_preserved(oop obj_containing_mark) const {

    51   if (!UseBiasedLocking)

    52     return (!is_unlocked() || !has_no_hash());

    53   return must_be_preserved_with_bias(obj_containing_mark);

    54 }

    56 // Should this header (including its age bits) be preserved in the

    57 // case of a promotion failure during scavenge?

    58 inline bool markOopDesc::must_be_preserved_with_bias_for_promotion_failure(oop obj_containing_mark) const {

    59   assert(UseBiasedLocking, "unexpected");

    60   // We don't explicitly save off the mark words of biased and

    61   // currently-locked objects during scavenges, so if during a

    62   // promotion failure we encounter either a biased mark word or a

    63   // klass which still has a biasable prototype header, we have to

    64   // preserve the mark word. This results in oversaving, but promotion

    65   // failures are rare, and this avoids adding more complex logic to

    66   // the scavengers to call new variants of

    67   // BiasedLocking::preserve_marks() / restore_marks() in the middle

    68   // of a scavenge when a promotion failure has first been detected.

    69   if (has_bias_pattern() ||

    70       prototype_for_object(obj_containing_mark)->has_bias_pattern()) {

    71     return true;

    72   }

    73   return (this != prototype());

    74 }

    76 inline bool markOopDesc::must_be_preserved_for_promotion_failure(oop obj_containing_mark) const {

    77   if (!UseBiasedLocking)

    78     return (this != prototype());

    79   return must_be_preserved_with_bias_for_promotion_failure(obj_containing_mark);

    80 }

    83 // Should this header (including its age bits) be preserved in the

    84 // case of a scavenge in which CMS is the old generation?

    85 inline bool markOopDesc::must_be_preserved_with_bias_for_cms_scavenge(klassOop klass_of_obj_containing_mark) const {

    86   assert(UseBiasedLocking, "unexpected");

    87   // CMS scavenges preserve mark words in similar fashion to promotion failures; see above

    88   if (has_bias_pattern() ||

    89       klass_of_obj_containing_mark->klass_part()->prototype_header()->has_bias_pattern()) {

    90     return true;

    91   }

    92   return (this != prototype());

    93 }

    94 inline bool markOopDesc::must_be_preserved_for_cms_scavenge(klassOop klass_of_obj_containing_mark) const {

    95   if (!UseBiasedLocking)

    96     return (this != prototype());

    97   return must_be_preserved_with_bias_for_cms_scavenge(klass_of_obj_containing_mark);

    98 }

   100 inline markOop markOopDesc::prototype_for_object(oop obj) {

   101 #ifdef ASSERT

   102   markOop prototype_header = obj->klass()->klass_part()->prototype_header();

   103   assert(prototype_header == prototype() || prototype_header->has_bias_pattern(), "corrupt prototype header");

   104 #endif

   105   return obj->klass()->klass_part()->prototype_header();

   106 }

   108 #endif // SHARE_VM_OOPS_MARKOOP_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/oops/markOop.inline.hpp@f95d63e2154a

src/share/vm/oops/markOop.inline.hpp