CheckClassHeap.cpp

/*******************************************************************************
 * Copyright IBM Corp. and others 1991
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 *******************************************************************************/

#include "CheckEngine.hpp"
#include "CheckClassHeap.hpp"
#include "ModronTypes.hpp"
#include "ScanFormatter.hpp"

GC_Check *
GC_CheckClassHeap::newInstance(J9JavaVM *javaVM, GC_CheckEngine *engine)
{
	MM_Forge *forge = MM_GCExtensions::getExtensions(javaVM)->getForge();
	
	GC_CheckClassHeap *check = (GC_CheckClassHeap *) forge->allocate(sizeof(GC_CheckClassHeap), MM_AllocationCategory::DIAGNOSTIC, J9_GET_CALLSITE());
	if(check) {
		new(check) GC_CheckClassHeap(javaVM, engine);
	}
	return check;
}

void
GC_CheckClassHeap::kill()
{
	MM_Forge *forge = MM_GCExtensions::getExtensions(_javaVM)->getForge();
	forge->free(this);
}

void
GC_CheckClassHeap::check()
{
	GC_SegmentIterator segmentIterator(_javaVM->classMemorySegments, MEMORY_TYPE_RAM_CLASS);
	J9MemorySegment *segment;
	J9Class *clazz;

	while((segment = segmentIterator.nextSegment()) != NULL) {
		_engine->clearPreviousObjects();

		GC_ClassHeapIterator classHeapIterator(_javaVM, segment);
		while((clazz = classHeapIterator.nextClass()) != NULL) {
			if (_engine->checkClassHeap(_javaVM, clazz, segment) != J9MODRON_SLOT_ITERATOR_OK ){
				return;
			}
			_engine->pushPreviousClass(clazz);
		}
	}
}

void
GC_CheckClassHeap::print()
{
	PORT_ACCESS_FROM_PORT(_portLibrary);
	j9tty_printf(PORTLIB, "Printing of class heap not currently supported\n");
}