src/cpu/sparc/vm/bytecodeInterpreter_sparc.hpp

Thu, 07 Apr 2011 09:53:20 -0700

author
johnc
date
Thu, 07 Apr 2011 09:53:20 -0700
changeset 2781
e1162778c1c8
parent 2314
f95d63e2154a
child 6483
018b357638aa
permissions
-rw-r--r--

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) 2002, 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 CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_HPP
    26 #define CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_HPP
    28 // Platform specific for C++ based Interpreter
    29 #define LOTS_OF_REGS    /* Lets interpreter use plenty of registers */
    31 private:
    33     // save the bottom of the stack after frame manager setup. For ease of restoration after return
    34     // from recursive interpreter call
    35     intptr_t*  _frame_bottom;             /* saved bottom of frame manager frame */
    36     intptr_t* _last_Java_pc;              /* pc to return to in frame manager */
    37     interpreterState _self_link;          /*  Previous interpreter state  */ /* sometimes points to self??? */
    38     double    _native_fresult;            /* save result of native calls that might return floats */
    39     intptr_t  _native_lresult;            /* save result of native calls that might return handle/longs */
    40 public:
    42     static void pd_layout_interpreterState(interpreterState istate, address last_Java_pc, intptr_t* last_Java_fp);
    45 #define SET_LAST_JAVA_FRAME()
    47 #define RESET_LAST_JAVA_FRAME() THREAD->frame_anchor()->set_flags(0);
    49 /*
    50  * Macros for accessing the stack.
    51  */
    52 #undef STACK_INT
    53 #undef STACK_FLOAT
    54 #undef STACK_ADDR
    55 #undef STACK_OBJECT
    56 #undef STACK_DOUBLE
    57 #undef STACK_LONG
    58 // JavaStack Implementation
    61 #define GET_STACK_SLOT(offset)    (*((intptr_t*) &topOfStack[-(offset)]))
    62 #define STACK_SLOT(offset)    ((address) &topOfStack[-(offset)])
    63 #define STACK_ADDR(offset)    (*((address *) &topOfStack[-(offset)]))
    64 #define STACK_INT(offset)     (*((jint*) &topOfStack[-(offset)]))
    65 #define STACK_FLOAT(offset)   (*((jfloat *) &topOfStack[-(offset)]))
    66 #define STACK_OBJECT(offset)  (*((oop *) &topOfStack [-(offset)]))
    67 #define STACK_DOUBLE(offset)  (((VMJavaVal64*) &topOfStack[-(offset)])->d)
    68 #define STACK_LONG(offset)    (((VMJavaVal64 *) &topOfStack[-(offset)])->l)
    70 #define SET_STACK_SLOT(value, offset)   (*(intptr_t*)&topOfStack[-(offset)] = *(intptr_t*)(value))
    71 #define SET_STACK_ADDR(value, offset)   (*((address *)&topOfStack[-(offset)]) = (value))
    72 #define SET_STACK_INT(value, offset)    (*((jint *)&topOfStack[-(offset)]) = (value))
    73 #define SET_STACK_FLOAT(value, offset)  (*((jfloat *)&topOfStack[-(offset)]) = (value))
    74 #define SET_STACK_OBJECT(value, offset) (*((oop *)&topOfStack[-(offset)]) = (value))
    75 #define SET_STACK_DOUBLE(value, offset) (((VMJavaVal64*)&topOfStack[-(offset)])->d = (value))
    76 #define SET_STACK_DOUBLE_FROM_ADDR(addr, offset) (((VMJavaVal64*)&topOfStack[-(offset)])->d =  \
    77                                                  ((VMJavaVal64*)(addr))->d)
    78 #define SET_STACK_LONG(value, offset)   (((VMJavaVal64*)&topOfStack[-(offset)])->l = (value))
    79 #define SET_STACK_LONG_FROM_ADDR(addr, offset)   (((VMJavaVal64*)&topOfStack[-(offset)])->l =  \
    80                                                  ((VMJavaVal64*)(addr))->l)
    82 #define LOCALS_SLOT(offset)    ((intptr_t*)&locals[-(offset)])
    83 #define LOCALS_ADDR(offset)    ((address)locals[-(offset)])
    84 #define LOCALS_INT(offset)     (*((jint*)&locals[-(offset)]))
    85 #define LOCALS_FLOAT(offset)   (*((jfloat*)&locals[-(offset)]))
    86 #define LOCALS_OBJECT(offset)  ((oop)locals[-(offset)])
    87 #define LOCALS_DOUBLE(offset)  (((VMJavaVal64*)&locals[-((offset) + 1)])->d)
    88 #define LOCALS_LONG(offset)    (((VMJavaVal64*)&locals[-((offset) + 1)])->l)
    89 #define LOCALS_LONG_AT(offset) (((address)&locals[-((offset) + 1)]))
    90 #define LOCALS_DOUBLE_AT(offset) (((address)&locals[-((offset) + 1)]))
    92 #define SET_LOCALS_SLOT(value, offset)    (*(intptr_t*)&locals[-(offset)] = *(intptr_t *)(value))
    93 #define SET_LOCALS_ADDR(value, offset)    (*((address *)&locals[-(offset)]) = (value))
    94 #define SET_LOCALS_INT(value, offset)     (*((jint *)&locals[-(offset)]) = (value))
    95 #define SET_LOCALS_FLOAT(value, offset)   (*((jfloat *)&locals[-(offset)]) = (value))
    96 #define SET_LOCALS_OBJECT(value, offset)  (*((oop *)&locals[-(offset)]) = (value))
    97 #define SET_LOCALS_DOUBLE(value, offset)  (((VMJavaVal64*)&locals[-((offset)+1)])->d = (value))
    98 #define SET_LOCALS_LONG(value, offset)    (((VMJavaVal64*)&locals[-((offset)+1)])->l = (value))
    99 #define SET_LOCALS_DOUBLE_FROM_ADDR(addr, offset) (((VMJavaVal64*)&locals[-((offset)+1)])->d = \
   100                                                   ((VMJavaVal64*)(addr))->d)
   101 #define SET_LOCALS_LONG_FROM_ADDR(addr, offset) (((VMJavaVal64*)&locals[-((offset)+1)])->l = \
   102                                                 ((VMJavaVal64*)(addr))->l)
   104 #endif // CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_HPP

mercurial