Mercurial > jdk8-mips64-public > hotspot / annotate
src/cpu/sparc/vm/jniTypes_sparc.hpp@e1162778c1c8 (annotated)
src/cpu/sparc/vm/jniTypes_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 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
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef CPU_SPARC_VM_JNITYPES_SPARC_HPP |
| stefank@2314 | 26 | #define CPU_SPARC_VM_JNITYPES_SPARC_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "memory/allocation.hpp" |
| stefank@2314 | 29 | #include "oops/oop.hpp" |
| stefank@2314 | 30 | #include "prims/jni.h" |
| stefank@2314 | 31 | |
| duke@435 | 32 | // This file holds platform-dependent routines used to write primitive jni |
| duke@435 | 33 | // types to the array of arguments passed into JavaCalls::call |
| duke@435 | 34 | |
| duke@435 | 35 | class JNITypes : AllStatic { |
| duke@435 | 36 | // These functions write a java primitive type (in native format) |
| duke@435 | 37 | // to a java stack slot array to be passed as an argument to JavaCalls:calls. |
| duke@435 | 38 | // I.e., they are functionally 'push' operations if they have a 'pos' |
| duke@435 | 39 | // formal parameter. Note that jlong's and jdouble's are written |
| duke@435 | 40 | // _in reverse_ of the order in which they appear in the interpreter |
| duke@435 | 41 | // stack. This is because call stubs (see stubGenerator_sparc.cpp) |
| duke@435 | 42 | // reverse the argument list constructed by JavaCallArguments (see |
| duke@435 | 43 | // javaCalls.hpp). |
| duke@435 | 44 | |
| duke@435 | 45 | private: |
| duke@435 | 46 | // Helper routines. |
| duke@435 | 47 | static inline void put_int2 (jint *from, jint *to) { to[0] = from[0]; to[1] = from[1]; } |
| duke@435 | 48 | static inline void put_int2 (jint *from, jint *to, int& pos) { put_int2 (from, (jint *)((intptr_t *)to + pos)); pos += 2; } |
| duke@435 | 49 | static inline void put_int2r(jint *from, jint *to) { to[0] = from[1]; to[1] = from[0]; } |
| duke@435 | 50 | static inline void put_int2r(jint *from, jint *to, int& pos) { put_int2r(from, (jint *)((intptr_t *)to + pos)); pos += 2; } |
| duke@435 | 51 | |
| duke@435 | 52 | public: |
| duke@435 | 53 | // Ints are stored in native format in one JavaCallArgument slot at *to. |
| duke@435 | 54 | static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; } |
| duke@435 | 55 | static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; } |
| duke@435 | 56 | static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; } |
| duke@435 | 57 | |
| duke@435 | 58 | #ifdef _LP64 |
| duke@435 | 59 | // Longs are stored in native format in one JavaCallArgument slot at *(to+1). |
| duke@435 | 60 | static inline void put_long(jlong from, intptr_t *to) { *(jlong *)(to + 1 + 0) = from; } |
| duke@435 | 61 | static inline void put_long(jlong from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) = from; pos += 2; } |
| duke@435 | 62 | static inline void put_long(jlong *from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) = *from; pos += 2; } |
| duke@435 | 63 | #else |
| duke@435 | 64 | // Longs are stored in reversed native word format in two JavaCallArgument slots at *to. |
| duke@435 | 65 | // The high half is in *(to+1) and the low half in *to. |
| duke@435 | 66 | static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, (jint *)to); } |
| duke@435 | 67 | static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, (jint *)to, pos); } |
| duke@435 | 68 | static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, (jint *)to, pos); } |
| duke@435 | 69 | #endif |
| duke@435 | 70 | |
| duke@435 | 71 | // Oops are stored in native format in one JavaCallArgument slot at *to. |
| duke@435 | 72 | static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; } |
| duke@435 | 73 | static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; } |
| duke@435 | 74 | static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; } |
| duke@435 | 75 | |
| duke@435 | 76 | // Floats are stored in native format in one JavaCallArgument slot at *to. |
| duke@435 | 77 | static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; } |
| duke@435 | 78 | static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; } |
| duke@435 | 79 | static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; } |
| duke@435 | 80 | |
| duke@435 | 81 | #ifdef _LP64 |
| duke@435 | 82 | // Doubles are stored in native word format in one JavaCallArgument slot at *(to+1). |
| duke@435 | 83 | static inline void put_double(jdouble from, intptr_t *to) { *(jdouble *)(to + 1 + 0) = from; } |
| duke@435 | 84 | static inline void put_double(jdouble from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = from; pos += 2; } |
| duke@435 | 85 | static inline void put_double(jdouble *from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = *from; pos += 2; } |
| duke@435 | 86 | #else |
| duke@435 | 87 | // Doubles are stored in reversed native word format in two JavaCallArgument slots at *to. |
| duke@435 | 88 | static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, (jint *)to); } |
| duke@435 | 89 | static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, (jint *)to, pos); } |
| duke@435 | 90 | static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, (jint *)to, pos); } |
| duke@435 | 91 | #endif |
| duke@435 | 92 | |
| duke@435 | 93 | // The get_xxx routines, on the other hand, actually _do_ fetch |
| duke@435 | 94 | // java primitive types from the interpreter stack. |
| duke@435 | 95 | static inline jint get_int(intptr_t *from) { return *(jint *)from; } |
| duke@435 | 96 | |
| duke@435 | 97 | #ifdef _LP64 |
| duke@435 | 98 | static inline jlong get_long(intptr_t *from) { return *(jlong *)from; } |
| duke@435 | 99 | #else |
| duke@435 | 100 | static inline jlong get_long(intptr_t *from) { return ((jlong)(*( signed int *)((jint *)from )) << 32) | |
| duke@435 | 101 | ((jlong)(*(unsigned int *)((jint *)from + 1)) << 0); } |
| duke@435 | 102 | #endif |
| duke@435 | 103 | |
| duke@435 | 104 | static inline oop get_obj(intptr_t *from) { return *(oop *)from; } |
| duke@435 | 105 | static inline jfloat get_float(intptr_t *from) { return *(jfloat *)from; } |
| duke@435 | 106 | |
| duke@435 | 107 | #ifdef _LP64 |
| duke@435 | 108 | static inline jdouble get_double(intptr_t *from) { return *(jdouble *)from; } |
| duke@435 | 109 | #else |
| duke@435 | 110 | static inline jdouble get_double(intptr_t *from) { jlong jl = ((jlong)(*( signed int *)((jint *)from )) << 32) | |
| duke@435 | 111 | ((jlong)(*(unsigned int *)((jint *)from + 1)) << 0); |
| duke@435 | 112 | return *(jdouble *)&jl; } |
| duke@435 | 113 | #endif |
| duke@435 | 114 | |
| duke@435 | 115 | }; |
| stefank@2314 | 116 | |
| stefank@2314 | 117 | #endif // CPU_SPARC_VM_JNITYPES_SPARC_HPP |
