增强bootstrap类AbstractPlainSocketImpl#connectToAddress出现NPE

[zhaoyb1990]

增强bootstrap类AbstractPlainSocketImpl#connectToAddress出现NPE

2019-06-26 13:27:26 default WARN  transform java/net/AbstractPlainSocketImpl failed, by module=xxxx in loader=null
java.lang.NullPointerException: null
	at com.alibaba.jvm.sandbox.core.util.AsmUtils.getCommonSuperClassImplByAsm(AsmUtils.java:30)
	at com.alibaba.jvm.sandbox.core.util.AsmUtils.getCommonSuperClass(AsmUtils.java:23)
	at com.alibaba.jvm.sandbox.core.enhance.EventEnhancer$1.getCommonSuperClass(EventEnhancer.java:52)
	at org.objectweb.asm.SymbolTable.addMergedType(SymbolTable.java:1198)
	at org.objectweb.asm.Frame.merge(Frame.java:1294)
	at org.objectweb.asm.Frame.merge(Frame.java:1175)
	at org.objectweb.asm.MethodWriter.computeAllFrames(MethodWriter.java:1617)
	at org.objectweb.asm.MethodWriter.visitMaxs(MethodWriter.java:1553)
	at org.objectweb.asm.ClassReader.readCode(ClassReader.java:2426)
	at org.objectweb.asm.ClassReader.readMethod(ClassReader.java:1275)
	at org.objectweb.asm.ClassReader.accept(ClassReader.java:679)
	at org.objectweb.asm.ClassReader.accept(ClassReader.java:391)
	at com.alibaba.jvm.sandbox.core.enhance.EventEnhancer.toByteCodeArray(EventEnhancer.java:100)
	at com.alibaba.jvm.sandbox.core.manager.impl.SandboxClassFileTransformer._transform(SandboxClassFileTransformer.java:135)
	at com.alibaba.jvm.sandbox.core.manager.impl.SandboxClassFileTransformer.transform(SandboxClassFileTransformer.java:92)
	at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:428)
	at sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
	at sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:144)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultModuleEventWatcher.reTransformClasses(DefaultModuleEventWatcher.java:119)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultModuleEventWatcher.watch(DefaultModuleEventWatcher.java:200)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultModuleEventWatcher.watch(DefaultModuleEventWatcher.java:166)
	at com.alibaba.jvm.sandbox.api.listener.ext.EventWatchBuilder.build(EventWatchBuilder.java:764)
	at com.alibaba.jvm.sandbox.api.listener.ext.EventWatchBuilder.access$400(EventWatchBuilder.java:35)
	at com.alibaba.jvm.sandbox.api.listener.ext.EventWatchBuilder$BuildingForBehavior.onWatch(EventWatchBuilder.java:633)
	at com.taobao.iastmodule.core.MockCoreModule.loadCompleted(MockCoreModule.java:121)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultCoreModuleManager.callAndFireModuleLifeCycle(DefaultCoreModuleManager.java:135)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultCoreModuleManager.load(DefaultCoreModuleManager.java:189)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultCoreModuleManager.access$300(DefaultCoreModuleManager.java:36)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultCoreModuleManager$InnerModuleLoadCallback.onLoad(DefaultCoreModuleManager.java:563)
	at com.alibaba.jvm.sandbox.core.manager.impl.ModuleJarLoader.loadingModules(ModuleJarLoader.java:100)
	at com.alibaba.jvm.sandbox.core.manager.impl.ModuleJarLoader.load(ModuleJarLoader.java:163)
	at com.alibaba.jvm.sandbox.core.manager.impl.ModuleLibLoader.load(ModuleLibLoader.java:79)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultCoreModuleManager.forceFlush(DefaultCoreModuleManager.java:765)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultCoreModuleManager.flush(DefaultCoreModuleManager.java:570)
	at com.alibaba.jvm.sandbox.core.manager.impl.DefaultModuleManager.flush(DefaultModuleManager.java:27)
	at com.alibaba.jvm.sandbox.module.mgr.ModuleMgrModule.flush(ModuleMgrModule.java:112)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.alibaba.jvm.sandbox.core.server.jetty.servlet.ModuleHttpServlet.doMethod(ModuleHttpServlet.java:119)
	at com.alibaba.jvm.sandbox.core.server.jetty.servlet.ModuleHttpServlet.doGet(ModuleHttpServlet.java:46)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:594)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)
	at org.eclipse.jetty.server.Server.handle(Server.java:351)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:454)
	at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:890)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:944)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:634)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:609)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:45)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534)
	at java.lang.Thread.run(Thread.java:852)

问题定位（boostrap类classloader是null）导致npe

[z529192557]

fix in #170

[oldmanpushcart]

1.2.2版本发布解决