jdk8-mips64-public/hotspot: src/cpu/sparc/vm/bytecodeInterpreter_sparc.inline.hpp@e1162778c1c8 (annotated)

src/cpu/sparc/vm/bytecodeInterpreter_sparc.inline.hpp@e1162778c1c8 (annotated)

src/cpu/sparc/vm/bytecodeInterpreter_sparc.inline.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 6876: 710a3c8b516e
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

 /*
  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_INLINE_HPP
 #define CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_INLINE_HPP
 // Inline interpreter functions for sparc
 inline jfloat BytecodeInterpreter::VMfloatAdd(jfloat op1, jfloat op2) { return op1 + op2; }
 inline jfloat BytecodeInterpreter::VMfloatSub(jfloat op1, jfloat op2) { return op1 - op2; }
 inline jfloat BytecodeInterpreter::VMfloatMul(jfloat op1, jfloat op2) { return op1 * op2; }
 inline jfloat BytecodeInterpreter::VMfloatDiv(jfloat op1, jfloat op2) { return op1 / op2; }
 inline jfloat BytecodeInterpreter::VMfloatRem(jfloat op1, jfloat op2) { return fmod(op1, op2); }
 inline jfloat BytecodeInterpreter::VMfloatNeg(jfloat op) { return -op; }
 inline int32_t BytecodeInterpreter::VMfloatCompare(jfloat op1, jfloat op2, int32_t direction) {
   return ( op1 < op2 ? -1 :
                op1 > op2 ? 1 :
                    op1 == op2 ? 0 :
                        (direction == -1 || direction == 1) ? direction : 0);
 }
 inline void BytecodeInterpreter::VMmemCopy64(uint32_t to[2], const uint32_t from[2]) {
   // x86 can do unaligned copies but not 64bits at a time
   to[0] = from[0]; to[1] = from[1];
 }
 // The long operations depend on compiler support for "long long" on x86
 inline jlong BytecodeInterpreter::VMlongAdd(jlong op1, jlong op2) {
   return op1 + op2;
 }
 inline jlong BytecodeInterpreter::VMlongAnd(jlong op1, jlong op2) {
   return op1 & op2;
 }
 inline jlong BytecodeInterpreter::VMlongDiv(jlong op1, jlong op2) {
   // QQQ what about check and throw...
   return op1 / op2;
 }
 inline jlong BytecodeInterpreter::VMlongMul(jlong op1, jlong op2) {
   return op1 * op2;
 }
 inline jlong BytecodeInterpreter::VMlongOr(jlong op1, jlong op2) {
   return op1 | op2;
 }
 inline jlong BytecodeInterpreter::VMlongSub(jlong op1, jlong op2) {
   return op1 - op2;
 }
 inline jlong BytecodeInterpreter::VMlongXor(jlong op1, jlong op2) {
   return op1 ^ op2;
 }
 inline jlong BytecodeInterpreter::VMlongRem(jlong op1, jlong op2) {
   return op1 % op2;
 }
 inline jlong BytecodeInterpreter::VMlongUshr(jlong op1, jint op2) {
   // CVM did this 0x3f mask, is the really needed??? QQQ
   return ((unsigned long long) op1) >> (op2 & 0x3F);
 }
 inline jlong BytecodeInterpreter::VMlongShr(jlong op1, jint op2) {
   return op1 >> (op2 & 0x3F);
 }
 inline jlong BytecodeInterpreter::VMlongShl(jlong op1, jint op2) {
   return op1 << (op2 & 0x3F);
 }
 inline jlong BytecodeInterpreter::VMlongNeg(jlong op) {
   return -op;
 }
 inline jlong BytecodeInterpreter::VMlongNot(jlong op) {
   return ~op;
 }
 inline int32_t BytecodeInterpreter::VMlongLtz(jlong op) {
   return (op <= 0);
 }
 inline int32_t BytecodeInterpreter::VMlongGez(jlong op) {
   return (op >= 0);
 }
 inline int32_t BytecodeInterpreter::VMlongEqz(jlong op) {
   return (op == 0);
 }
 inline int32_t BytecodeInterpreter::VMlongEq(jlong op1, jlong op2) {
   return (op1 == op2);
 }
 inline int32_t BytecodeInterpreter::VMlongNe(jlong op1, jlong op2) {
   return (op1 != op2);
 }
 inline int32_t BytecodeInterpreter::VMlongGe(jlong op1, jlong op2) {
   return (op1 >= op2);
 }
 inline int32_t BytecodeInterpreter::VMlongLe(jlong op1, jlong op2) {
   return (op1 <= op2);
 }
 inline int32_t BytecodeInterpreter::VMlongLt(jlong op1, jlong op2) {
   return (op1 < op2);
 }
 inline int32_t BytecodeInterpreter::VMlongGt(jlong op1, jlong op2) {
   return (op1 > op2);
 }
 inline int32_t BytecodeInterpreter::VMlongCompare(jlong op1, jlong op2) {
   return (VMlongLt(op1, op2) ? -1 : VMlongGt(op1, op2) ? 1 : 0);
 }
 // Long conversions
 inline jdouble BytecodeInterpreter::VMlong2Double(jlong val) {
   return (jdouble) val;
 }
 inline jfloat BytecodeInterpreter::VMlong2Float(jlong val) {
   return (jfloat) val;
 }
 inline jint BytecodeInterpreter::VMlong2Int(jlong val) {
   return (jint) val;
 }
 // Double Arithmetic
 inline jdouble BytecodeInterpreter::VMdoubleAdd(jdouble op1, jdouble op2) {
   return op1 + op2;
 }
 inline jdouble BytecodeInterpreter::VMdoubleDiv(jdouble op1, jdouble op2) {
   // Divide by zero... QQQ
   return op1 / op2;
 }
 inline jdouble BytecodeInterpreter::VMdoubleMul(jdouble op1, jdouble op2) {
   return op1 * op2;
 }
 inline jdouble BytecodeInterpreter::VMdoubleNeg(jdouble op) {
   return -op;
 }
 inline jdouble BytecodeInterpreter::VMdoubleRem(jdouble op1, jdouble op2) {
   return fmod(op1, op2);
 }
 inline jdouble BytecodeInterpreter::VMdoubleSub(jdouble op1, jdouble op2) {
   return op1 - op2;
 }
 inline int32_t BytecodeInterpreter::VMdoubleCompare(jdouble op1, jdouble op2, int32_t direction) {
   return ( op1 < op2 ? -1 :
                op1 > op2 ? 1 :
                    op1 == op2 ? 0 :
                        (direction == -1 || direction == 1) ? direction : 0);
 }
 // Double Conversions
 inline jfloat BytecodeInterpreter::VMdouble2Float(jdouble val) {
   return (jfloat) val;
 }
 // Float Conversions
 inline jdouble BytecodeInterpreter::VMfloat2Double(jfloat op) {
   return (jdouble) op;
 }
 // Integer Arithmetic
 inline jint BytecodeInterpreter::VMintAdd(jint op1, jint op2) {
   return op1 + op2;
 }
 inline jint BytecodeInterpreter::VMintAnd(jint op1, jint op2) {
   return op1 & op2;
 }
 inline jint BytecodeInterpreter::VMintDiv(jint op1, jint op2) {
   /* it's possible we could catch this special case implicitly */
   if (op1 == 0x80000000 && op2 == -1) return op1;
   else return op1 / op2;
 }
 inline jint BytecodeInterpreter::VMintMul(jint op1, jint op2) {
   return op1 * op2;
 }
 inline jint BytecodeInterpreter::VMintNeg(jint op) {
   return -op;
 }
 inline jint BytecodeInterpreter::VMintOr(jint op1, jint op2) {
   return op1 | op2;
 }
 inline jint BytecodeInterpreter::VMintRem(jint op1, jint op2) {
   /* it's possible we could catch this special case implicitly */
   if (op1 == 0x80000000 && op2 == -1) return 0;
   else return op1 % op2;
 }
 inline jint BytecodeInterpreter::VMintShl(jint op1, jint op2) {
   return op1 << (op2 & 0x1f);
 }
 inline jint BytecodeInterpreter::VMintShr(jint op1, jint op2) {
   return op1 >> (op2 & 0x1f);
 }
 inline jint BytecodeInterpreter::VMintSub(jint op1, jint op2) {
   return op1 - op2;
 }
 inline juint BytecodeInterpreter::VMintUshr(jint op1, jint op2) {
   return ((juint) op1) >> (op2 & 0x1f);
 }
 inline jint BytecodeInterpreter::VMintXor(jint op1, jint op2) {
   return op1 ^ op2;
 }
 inline jdouble BytecodeInterpreter::VMint2Double(jint val) {
   return (jdouble) val;
 }
 inline jfloat BytecodeInterpreter::VMint2Float(jint val) {
   return (jfloat) val;
 }
 inline jlong BytecodeInterpreter::VMint2Long(jint val) {
   return (jlong) val;
 }
 inline jchar BytecodeInterpreter::VMint2Char(jint val) {
   return (jchar) val;
 }
 inline jshort BytecodeInterpreter::VMint2Short(jint val) {
   return (jshort) val;
 }
 inline jbyte BytecodeInterpreter::VMint2Byte(jint val) {
   return (jbyte) val;
 }
 // The implementations are platform dependent. We have to worry about alignment
 // issues on some machines which can change on the same platform depending on
 // whether it is an LP64 machine also.
 // We know that on LP32 mode that longs/doubles are the only thing that gives
 // us alignment headaches. We also know that the worst we have is 32bit alignment
 // so thing are not really too bad.
 // (Also sparcworks compiler does the right thing for free if we don't use -arch..
 // switches. Only gcc gives us a hard time. In LP64 mode I think we have no issue
 // with alignment.
 #ifdef _GNU_SOURCE
   #define ALIGN_CONVERTER        /* Needs alignment converter */
 #else
   #undef ALIGN_CONVERTER        /* No alignment converter */
 #endif /* _GNU_SOURCE */
 #ifdef ALIGN_CONVERTER
 class u8_converter {
   private:
   public:
   static jdouble get_jdouble(address p) {
     VMJavaVal64 tmp;
     tmp.v[0] = ((uint32_t*)p)[0];
     tmp.v[1] = ((uint32_t*)p)[1];
     return tmp.d;
   }
   static void put_jdouble(address p, jdouble d) {
     VMJavaVal64 tmp;
     tmp.d = d;
     ((uint32_t*)p)[0] = tmp.v[0];
     ((uint32_t*)p)[1] = tmp.v[1];
   }
   static jlong get_jlong(address p) {
     VMJavaVal64 tmp;
     tmp.v[0] = ((uint32_t*)p)[0];
     tmp.v[1] = ((uint32_t*)p)[1];
     return tmp.l;
   }
   static void put_jlong(address p, jlong l) {
     VMJavaVal64 tmp;
     tmp.l = l;
     ((uint32_t*)p)[0] = tmp.v[0];
     ((uint32_t*)p)[1] = tmp.v[1];
   }
 };
 #endif /* ALIGN_CONVERTER */
 #endif // CPU_SPARC_VM_BYTECODEINTERPRETER_SPARC_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/bytecodeInterpreter_sparc.inline.hpp@e1162778c1c8 (annotated)

src/cpu/sparc/vm/bytecodeInterpreter_sparc.inline.hpp