rcp - 在 Eclipse RCP 应用程序中使用 classmexer？

Question

我尝试在 Eclipse RCP 应用程序中使用 classmexer，但只收到 IllegalStateException：

java.lang.IllegalStateException: Agent not initted
at com.javamex.classmexer.Agent.getInstrumentation(Agent.java:33)
at com.javamex.classmexer.MemoryUtil.deepMemoryUsageOf(MemoryUtil.java:104)
at com.javamex.classmexer.MemoryUtil.deepMemoryUsageOf(MemoryUtil.java:80)
at classmexertester.ViewPart.createPartControl(ViewPart.java:22)
at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:375)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:229)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:534)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1245)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1198)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1597)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:643)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:570)
at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:568)
at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:272)
at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:981)
at org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2714)
at org.eclipse.ui.internal.WorkbenchWindow$28.run(WorkbenchWindow.java:3030)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:3011)
at org.eclipse.ui.internal.WorkbenchWindow.busyOpenPage(WorkbenchWindow.java:799)
at org.eclipse.ui.internal.Workbench$23.runWithException(Workbench.java:1229)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at org.eclipse.ui.internal.Workbench$33.runWithException(Workbench.java:1600)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4683)
at org.eclipse.ui.internal.StartupThreading.runWithoutExceptions(StartupThreading.java:94)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1595)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2628)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at classmexertester.Application.start(Application.java:20)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
at org.eclipse.equinox.launcher.Main.main(Main.java:1386)

在我输入的运行时配置中：

-javaagent:C:/Users/kd/workspace/ClassmexerTester/classmexer.jar

是不是我必须在 plugin.xml 中添加一些东西？

Answer 1

在我输入的运行时配置中：

-javaagent:C:/Users/kd/workspace/ClassmexerTester/classmexer.jar

这听起来不对。您需要-javaagent:C:/Users/kd/workspace/ClassmexerTester/classmexer.jar作为 JVM 参数传递。您可以在产品配置的 Launching 选项卡上的 JM Arguments 窗格中指定这些。

您还需要 plugin.xml 的 Runtime 选项卡的类路径窗格中包含的 jar 列表中的 classmexer.jar。

Answer 2

我看了这个多一点，并最终处于同样的情况。我不认为有一个简单的解决方案，因为问题源于 OSGi 框架使用单独的类加载器来加载包。请参阅如何在 Eclipse RCP 应用程序中使用 java.lang.instrument？

问题是由 -javaagent VM arg 初始化的 classmexer 代理的实例与我们在插件中获得的实例不同，因为使用了不同的类加载器。我能看到解决这个问题的唯一方法是修改代理类，或者使用上面示例中给出的基于 System.properties 的对象共享机制，或者通过实现VM 启动后启动代理机制并以编程方式附加代理在你的插件中。这两种方法都需要更改 classmexer Agent 类，因此由于源似乎不公开，因此不能立即可行。

但是，您可以使用Eclipse 测试和性能工具平台中提供的优秀应用程序分析工具

Answer 3

以下步骤为我完成了这项工作。在 Eclipse Java IDE 中，转到 Run Configuration->Arguments 选项卡并在 VM arguments 下输入“-javaagent:classmexer.jar”并应用更改。确保 classmexer.jar 也包含在 Eclipse Build 路径中。