jdk8-mips64-public/hotspot: src/cpu/sparc/vm/jni

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes

     1 /*

     2  * Copyright (c) 1997, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

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    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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    26 #if defined(__GNUC__) && (__GNUC__ >= 4)

    27   #define JNIEXPORT     __attribute__((visibility("default")))

    28   #define JNIIMPORT     __attribute__((visibility("default")))

    29 #else

    30   #define JNIEXPORT

    31   #define JNIIMPORT

    32 #endif

    33 #define JNICALL

    35 typedef int jint;

    37 #ifdef _LP64

    38   typedef long jlong;

    39 #else

    40   typedef long long jlong;

    41 #endif

    43 typedef signed char jbyte;

src/cpu/sparc/vm/jni_sparc.h@e1162778c1c8

src/cpu/sparc/vm/jni_sparc.h

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

src/cpu/sparc/vm/jni_sparc.h@e1162778c1c8

src/cpu/sparc/vm/jni_sparc.h