melix

If you take a look at the dump here: https://dl.dropboxusercontent.com/u/20288797/temp/memory-dump.tar.bz2

And that you look at the classes, you will see several copies of the class org.codenarc.rule.Violationororg.codehaus.groovy.antlr.parser.GroovyLexer`. The multiple copies come from different classloaders, which is fine. What is not is that those classes are not retained anymore, nor is their classloader (they are all softly or weakly reachable), but they are not garbage collected, leading to the leak.

To reproduce the PermGen leak, first make sure you use JDK 7 or JDK 6, but the two should be tested independently because Groovy doesn't use the same way to store global class information (ClassValue since JDK 7).

melix

@Grab(group='org.gperfutils', module='gbench', version='0.4.2-groovy-2.1')
@Grab('org.freemarker:freemarker:2.3.9')
import groovy.text.markup.MarkupTemplateEngine
import freemarker.template.*
 
MarkupTemplateEngine engine = new MarkupTemplateEngine()
def mkpTemplate1 = engine.createTemplate '''
html {
    body('It works!')
}

melix

    void testGrailsTagLibCompatibility() {
        TemplateConfiguration config = new TemplateConfiguration()
        MarkupTemplateEngine engine = new MarkupTemplateEngine(this.class.classLoader, config)
        def template = engine.createTemplate '''g.emoticon(happy:'true') { 'Hi John' }
'''
        StringWriter rendered = new StringWriter()
        def model = [:]
        def tpl = template.make(model)
        model.g = new TagLibAdapter(tpl)
        model.g.registerTagLib(SimpleTagLib)

melix

import org.codehaus.groovy.ast.ClassCodeExpressionTransformer
import org.codehaus.groovy.ast.ClassNode
import org.codehaus.groovy.ast.expr.ConstantExpression
import org.codehaus.groovy.ast.expr.DeclarationExpression
import org.codehaus.groovy.ast.expr.Expression
import org.codehaus.groovy.classgen.GeneratorContext
import org.codehaus.groovy.control.CompilationFailedException
import org.codehaus.groovy.control.CompilePhase
import org.codehaus.groovy.control.CompilerConfiguration
import org.codehaus.groovy.control.SourceUnit

melix

/*
 * Copyright 2003-2012 the original author or authors.
 *
 * 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

melix

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.9.0'
    }
}
apply plugin: 'android'

melix

    def "lazy constant evaluation"() {
        given:
            def config = new CompilerConfiguration()
            config.optimizationOptions.indy = true
            def shell = new GroovyShell(config)
        when:
            def method = shell.evaluate '''import groovy.transform.CompileStatic

import java.lang.invoke.CallSite
import java.lang.invoke.ConstantCallSite

melix

import groovy.transform.CompileStatic

import java.lang.invoke.CallSite
import java.lang.invoke.ConstantCallSite
import java.lang.invoke.MethodHandle
import java.lang.invoke.MethodHandles
import java.lang.invoke.MethodType
import java.lang.invoke.SwitchPoint

import static groovyjarjarasm.asm.Opcodes.*

melix

import org.codehaus.groovy.control.CompilerConfiguration

/*
 * Copyright 2003-2014 the original author or authors.
 *
 * 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

melix

import static Double.POSITIVE_INFINITY as ∞

∞.times {
  println it
  Thread.sleep(1000)
}