引导类加载器加载的类无法被sandbox增强

[z529192557]

BootstrapClassLoader 加载的类无法被sandbox注入, ASMUtils 30行报 NPE异常，
分析是 ClassFileTransformer.transform 该方法第一个loader在是BootstrapClassLoader时，为null，该null loader 透传到了ASMUtils 导致 NPE

[z529192557]

异常堆栈
2019-04-17 15:04:46 default WARN transform sun/net/www/protocol/http/HttpURLConnection failed, by module=http-url-connect 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.alibaba.jvm.sandbox.module.debug.HttpURLConnectModule.repairCheckState(HttpURLConnectModule.java:40)
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:748)

[oldmanpushcart]

1.2.2版本解决