Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/prims/whitebox.cpp
src/share/vm/prims/whitebox.cpp
- changeset 3619
- 2d503de963b3
- child 3681
- 51612f0c0a79
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| 3585:4ab89de75552 | 3619:2d503de963b3 |
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| 1 /* | |
| 2 * Copyright (c) 2012, 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 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 | |
| 27 #include "jni.h" | |
| 28 | |
| 29 #include "memory/universe.hpp" | |
| 30 #include "oops/oop.inline.hpp" | |
| 31 #include "prims/whitebox.hpp" | |
| 32 #include "runtime/interfaceSupport.hpp" | |
| 33 #include "runtime/os.hpp" | |
| 34 #include "utilities/debug.hpp" | |
| 35 | |
| 36 #ifndef SERIALGC | |
| 37 #include "gc_implementation/g1/concurrentMark.hpp" | |
| 38 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 39 #include "gc_implementation/g1/heapRegionRemSet.hpp" | |
| 40 #endif // !SERIALGC | |
| 41 | |
| 42 bool WhiteBox::_used = false; | |
| 43 | |
| 44 // Entry macro to transition from JNI to VM state. | |
| 45 | |
| 46 #define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header) | |
| 47 #define WB_END JNI_END | |
| 48 | |
| 49 // Definitions of functions exposed via Whitebox API | |
| 50 | |
| 51 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) | |
| 52 return (jlong)(void*)JNIHandles::resolve(obj); | |
| 53 WB_END | |
| 54 | |
| 55 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) | |
| 56 return heapOopSize; | |
| 57 WB_END | |
| 58 | |
| 59 #ifndef SERIALGC | |
| 60 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) | |
| 61 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
| 62 oop result = JNIHandles::resolve(obj); | |
| 63 const HeapRegion* hr = g1->heap_region_containing(result); | |
| 64 return hr->isHumongous(); | |
| 65 WB_END | |
| 66 | |
| 67 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) | |
| 68 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
| 69 size_t nr = g1->free_regions(); | |
| 70 return (jlong)nr; | |
| 71 WB_END | |
| 72 | |
| 73 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) | |
| 74 G1CollectedHeap* g1 = G1CollectedHeap::heap(); | |
| 75 ConcurrentMark* cm = g1->concurrent_mark(); | |
| 76 return cm->concurrent_marking_in_progress(); | |
| 77 WB_END | |
| 78 | |
| 79 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) | |
| 80 return (jint)HeapRegion::GrainBytes; | |
| 81 WB_END | |
| 82 #endif // !SERIALGC | |
| 83 | |
| 84 #define CC (char*) | |
| 85 | |
| 86 static JNINativeMethod methods[] = { | |
| 87 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, | |
| 88 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, | |
| 89 #ifndef SERIALGC | |
| 90 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, | |
| 91 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, | |
| 92 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, | |
| 93 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, | |
| 94 #endif // !SERIALGC | |
| 95 }; | |
| 96 | |
| 97 #undef CC | |
| 98 | |
| 99 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) | |
| 100 { | |
| 101 if (WhiteBoxAPI) { | |
| 102 // Make sure that wbclass is loaded by the null classloader | |
| 103 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); | |
| 104 Handle loader(ikh->class_loader()); | |
| 105 if (loader.is_null()) { | |
| 106 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI | |
| 107 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); | |
| 108 if (result == 0) { | |
| 109 WhiteBox::set_used(); | |
| 110 } | |
| 111 } | |
| 112 } | |
| 113 } | |
| 114 JVM_END |
