--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/prims/whitebox.cpp Thu Feb 23 14:58:35 2012 +0100
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2012, 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.
+ *
+ */
+
+#include "precompiled.hpp"
+
+#include "jni.h"
+
+#include "memory/universe.hpp"
+#include "oops/oop.inline.hpp"
+#include "prims/whitebox.hpp"
+#include "runtime/interfaceSupport.hpp"
+#include "runtime/os.hpp"
+#include "utilities/debug.hpp"
+
+#ifndef SERIALGC
+#include "gc_implementation/g1/concurrentMark.hpp"
+#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
+#include "gc_implementation/g1/heapRegionRemSet.hpp"
+#endif // !SERIALGC
+
+bool WhiteBox::_used = false;
+
+// Entry macro to transition from JNI to VM state.
+
+#define WB_ENTRY(result_type, header) JNI_ENTRY(result_type, header)
+#define WB_END JNI_END
+
+// Definitions of functions exposed via Whitebox API
+
+WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
+ return (jlong)(void*)JNIHandles::resolve(obj);
+WB_END
+
+WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
+ return heapOopSize;
+WB_END
+
+#ifndef SERIALGC
+WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
+ G1CollectedHeap* g1 = G1CollectedHeap::heap();
+ oop result = JNIHandles::resolve(obj);
+ const HeapRegion* hr = g1->heap_region_containing(result);
+ return hr->isHumongous();
+WB_END
+
+WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
+ G1CollectedHeap* g1 = G1CollectedHeap::heap();
+ size_t nr = g1->free_regions();
+ return (jlong)nr;
+WB_END
+
+WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
+ G1CollectedHeap* g1 = G1CollectedHeap::heap();
+ ConcurrentMark* cm = g1->concurrent_mark();
+ return cm->concurrent_marking_in_progress();
+WB_END
+
+WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
+ return (jint)HeapRegion::GrainBytes;
+WB_END
+#endif // !SERIALGC
+
+#define CC (char*)
+
+static JNINativeMethod methods[] = {
+ {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
+ {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
+#ifndef SERIALGC
+ {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
+ {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
+ {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
+ {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
+#endif // !SERIALGC
+};
+
+#undef CC
+
+JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
+ {
+ if (WhiteBoxAPI) {
+ // Make sure that wbclass is loaded by the null classloader
+ instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
+ Handle loader(ikh->class_loader());
+ if (loader.is_null()) {
+ ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
+ jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
+ if (result == 0) {
+ WhiteBox::set_used();
+ }
+ }
+ }
+ }
+JVM_END