Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvm_misc.hpp @ 3249:e1162778c1c8
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
| author | johnc |
|---|---|
| date | Thu, 07 Apr 2011 09:53:20 -0700 |
| parents | 3582bf76420e |
| children | 1d1603768966 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_PRIMS_JVM_MISC_HPP |
| 26 #define SHARE_VM_PRIMS_JVM_MISC_HPP | |
| 27 | |
| 28 #include "prims/jni.h" | |
| 29 #include "runtime/handles.hpp" | |
| 30 | |
| 0 | 31 // Useful entry points shared by JNI and JVM interface. |
| 32 // We do not allow real JNI or JVM entry point to call each other. | |
| 33 | |
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34 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS); |
| 0 | 35 |
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36 void trace_class_resolution(klassOop to_class); |
| 0 | 37 |
| 38 /* | |
| 39 * Support for Serialization and RMI. Currently used by HotSpot only. | |
| 40 */ | |
| 41 | |
| 42 extern "C" { | |
| 43 | |
| 44 void JNICALL | |
| 45 JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
| 46 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data); | |
| 47 | |
| 48 void JNICALL | |
| 49 JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
| 50 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data); | |
| 51 | |
| 52 } | |
| 53 | |
| 54 /* | |
| 55 * Support for -Xcheck:jni | |
| 56 */ | |
| 57 | |
| 58 extern struct JNINativeInterface_* jni_functions_nocheck(); | |
| 59 extern struct JNINativeInterface_* jni_functions_check(); | |
| 60 | |
| 61 /* | |
| 62 * Support for swappable jni function table. | |
| 63 */ | |
| 64 extern struct JNINativeInterface_* jni_functions(); | |
| 65 extern void copy_jni_function_table(const struct JNINativeInterface_* new_function_table); | |
| 66 | |
| 67 // Support for fast JNI accessors | |
| 68 extern "C" { | |
| 69 typedef jboolean (JNICALL *GetBooleanField_t) | |
| 70 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 71 typedef jbyte (JNICALL *GetByteField_t) | |
| 72 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 73 typedef jchar (JNICALL *GetCharField_t) | |
| 74 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 75 typedef jshort (JNICALL *GetShortField_t) | |
| 76 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 77 typedef jint (JNICALL *GetIntField_t) | |
| 78 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 79 typedef jlong (JNICALL *GetLongField_t) | |
| 80 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 81 typedef jfloat (JNICALL *GetFloatField_t) | |
| 82 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 83 typedef jdouble (JNICALL *GetDoubleField_t) | |
| 84 (JNIEnv *env, jobject obj, jfieldID fieldID); | |
| 85 } | |
| 86 | |
| 87 void quicken_jni_functions(); | |
| 88 address jni_GetBooleanField_addr(); | |
| 89 address jni_GetByteField_addr(); | |
| 90 address jni_GetCharField_addr(); | |
| 91 address jni_GetShortField_addr(); | |
| 92 address jni_GetIntField_addr(); | |
| 93 address jni_GetLongField_addr(); | |
| 94 address jni_GetFloatField_addr(); | |
| 95 address jni_GetDoubleField_addr(); | |
| 1972 | 96 |
| 97 #endif // SHARE_VM_PRIMS_JVM_MISC_HPP |