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infrastructure/io/src/main/java/tech/pegasys/teku/infrastructure/io/JemallocDetector.java
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/* | ||
* Copyright Consensys Software Inc., 2024 | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with | ||
* the License. You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on | ||
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the | ||
* specific language governing permissions and limitations under the License. | ||
*/ | ||
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package tech.pegasys.teku.infrastructure.io; | ||
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import com.sun.jna.Library; | ||
import com.sun.jna.Native; | ||
import com.sun.jna.ptr.IntByReference; | ||
import com.sun.jna.ptr.PointerByReference; | ||
import org.apache.logging.log4j.LogManager; | ||
import org.apache.logging.log4j.Logger; | ||
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@SuppressWarnings("JavaCase") | ||
public class JemallocDetector { | ||
private static final Logger LOG = LogManager.getLogger(); | ||
private static String _jemalloc; | ||
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public static void logJemallocPresence() { | ||
try { | ||
getJemalloc(); | ||
if (_jemalloc != null) { | ||
LOG.info("jemalloc: " + _jemalloc); | ||
} | ||
} catch (final Throwable throwable) { | ||
LOG.info("jemalloc library not found."); | ||
} | ||
} | ||
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private static void getJemalloc() { | ||
interface JemallocLib extends Library { | ||
int mallctl( | ||
String property, | ||
PointerByReference value, | ||
IntByReference len, | ||
String newValue, | ||
int newLen); | ||
} | ||
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final JemallocLib jemallocLib = Native.load("jemalloc", JemallocLib.class); | ||
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PointerByReference pVersion = new PointerByReference(); | ||
IntByReference pSize = new IntByReference(Native.POINTER_SIZE); | ||
jemallocLib.mallctl("version", pVersion, pSize, null, 0); | ||
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_jemalloc = pVersion.getValue().getString(0); | ||
} | ||
} |
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