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27c0786c3b
Add an internal testing API to HotSpot to enable more targeted testing of vm functionality Reviewed-by: phh, dholmes
115 lines
3.9 KiB
C++
115 lines
3.9 KiB
C++
/*
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jni.h"
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#include "memory/universe.hpp"
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#include "oops/oop.inline.hpp"
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#include "prims/whitebox.hpp"
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#include "runtime/interfaceSupport.hpp"
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#include "runtime/os.hpp"
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#include "utilities/debug.hpp"
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#ifndef SERIALGC
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#include "gc_implementation/g1/concurrentMark.hpp"
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#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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#include "gc_implementation/g1/heapRegionRemSet.hpp"
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#endif // !SERIALGC
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bool WhiteBox::_used = false;
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// Entry macro to transition from JNI to VM state.
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#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)
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#define WB_END JNI_END
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// Definitions of functions exposed via Whitebox API
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WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
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return (jlong)(void*)JNIHandles::resolve(obj);
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WB_END
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WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
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return heapOopSize;
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WB_END
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#ifndef SERIALGC
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WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
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G1CollectedHeap* g1 = G1CollectedHeap::heap();
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oop result = JNIHandles::resolve(obj);
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const HeapRegion* hr = g1->heap_region_containing(result);
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return hr->isHumongous();
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WB_END
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WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
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G1CollectedHeap* g1 = G1CollectedHeap::heap();
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size_t nr = g1->free_regions();
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return (jlong)nr;
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WB_END
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WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
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G1CollectedHeap* g1 = G1CollectedHeap::heap();
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ConcurrentMark* cm = g1->concurrent_mark();
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return cm->concurrent_marking_in_progress();
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WB_END
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WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
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return (jint)HeapRegion::GrainBytes;
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WB_END
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#endif // !SERIALGC
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#define CC (char*)
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static JNINativeMethod methods[] = {
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{CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
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{CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
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#ifndef SERIALGC
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{CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
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{CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
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{CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
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{CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
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#endif // !SERIALGC
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};
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#undef CC
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JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
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{
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if (WhiteBoxAPI) {
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// Make sure that wbclass is loaded by the null classloader
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instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
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Handle loader(ikh->class_loader());
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if (loader.is_null()) {
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ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
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jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
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if (result == 0) {
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WhiteBox::set_used();
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}
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}
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}
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}
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JVM_END
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