feat: support for JFR analysis (#252)

README.md

@@ -19,7 +19,7 @@
 
 ## Introduction
 
-Online Analyzer for Heap Dump, GC Log, and Thread Dump.
+Online Analyzer for Heap Dump, GC Log, Thread Dump and JFR.
 
 Please refer to [GitHub Pages](https://eclipse.github.io/jifa) for more information.
 

analysis/jfr/README.md

@@ -0,0 +1,21 @@
+# JFR Analysis
+
+Profiling is a type of runtime analysis. Java Flight Recorder (JFR) is the builtin Profiler for Java. It collects data on the fly and generates JFR files. JFR analysis gives you a birds-eye view of what is happening inside Java, such as CPU usage, memory allocation, and other activities of threads.
+
+### Supported Format
+
+- OpenJDK JFR (binary format)
+
+### Feature List
+
+The supported features are as follows:
+
+- CPU
+- Allocation
+- Wall Clock (Only JFR files created by async-profiler with wall engine)
+- File IO
+- Socket IO
+- Lock
+- Class Load
+- Thread Sleep
+- Native Execution Sample

analysis/jfr/jfr.gradle

@@ -0,0 +1,29 @@
+/********************************************************************************
+ * Copyright (c) 2024 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ ********************************************************************************/
+plugins {
+    id 'java-library'
+}
+
+apply from: "$rootDir/gradle/java.gradle"
+
+jar {
+    archiveBaseName.set("jfr")
+}
+
+dependencies {
+    api project(':analysis')
+    implementation 'org.openjdk.jmc:flightrecorder:8.2.0'
+    implementation 'org.openjdk.jmc:flightrecorder.rules:8.2.0'
+    implementation 'org.openjdk.jmc:flightrecorder.rules.jdk:8.2.0'
+    implementation group: 'org.ow2.asm', name: 'asm', version: '9.3'
+}

analysis/jfr/src/main/java/org/eclipse/jifa/jfr/JFRAnalysisApiExecutor.java

@@ -0,0 +1,63 @@
+/********************************************************************************
+ * Copyright (c) 2024 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ ********************************************************************************/
+package org.eclipse.jifa.jfr;
+
+import lombok.extern.slf4j.Slf4j;
+import org.eclipse.jifa.analysis.AbstractApiExecutor;
+import org.eclipse.jifa.analysis.listener.ProgressListener;
+import org.eclipse.jifa.analysis.support.MethodNameConverter;
+import org.eclipse.jifa.jfr.api.JFRAnalyzer;
+
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.function.Predicate;
+
+@Slf4j
+public class JFRAnalysisApiExecutor extends AbstractApiExecutor<JFRAnalyzer> {
+    @Override
+    public String namespace() {
+        return "jfr-file";
+    }
+
+    @Override
+    public Predicate<byte[]> matcher() {
+        return new Predicate<>() {
+            static final String HEADER = "FLR";
+
+            @Override
+            public boolean test(byte[] bytes) {
+                return bytes.length > HEADER.length() && new String(bytes, 0, HEADER.length()).equals(HEADER);
+            }
+        };
+    }
+
+    @Override
+    public boolean needOptionsForAnalysis(Path target) {
+        return false;
+    }
+
+    @Override
+    public void clean(Path target) {
+        super.clean(target);
+    }
+
+    @Override
+    protected MethodNameConverter methodNameConverter() {
+        return MethodNameConverter.GETTER_METHOD;
+    }
+
+    @Override
+    protected JFRAnalyzer buildAnalyzer(Path target, Map<String, String> options, ProgressListener listener) {
+        return new JFRAnalyzerImpl(target, options, listener);
+    }
+}