Details
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Bug
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Resolution: Duplicate
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Major
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None
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2.1.0
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None
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None
Description
When trying to instrument my code with Byteman 2.1.0, I always get the following error in stdout:
exits unaccounted for in block B4
Also, several NPEs occur. Here is the full output:
Setting org.jboss.byteman.verbose=true Setting org.jboss.byteman.debug=true org.jboss.byteman.agent.Transformer : possible trigger for rule trace method call in class test.byteman.BytemanBugMonitorEnter RuleTriggerMethodAdapter.injectTriggerPoint : inserting trigger into test.byteman.BytemanBugMonitorEnter.getData(java.lang.String) java.lang.Object for rule trace method call exits unaccounted for in block B4 org.jboss.byteman.agent.Transformer : unexpected error injecting trigger for rule trace method call into class test.byteman.BytemanBugMonitorEnter java.lang.NullPointerException java.lang.NullPointerException at org.jboss.byteman.agent.adapter.cfg.CFG.computeContainment(CFG.java:1108) at org.jboss.byteman.agent.adapter.cfg.CFG.carryForward(CFG.java:962) at org.jboss.byteman.agent.adapter.cfg.CFG.split(CFG.java:1240) at org.jboss.byteman.agent.adapter.RuleTriggerMethodAdapter.visitJumpInsn(RuleTriggerMethodAdapter.java:722) at org.jboss.byteman.agent.adapter.EntryTriggerAdapter$EntryTriggerMethodAdapter.visitJumpInsn(EntryTriggerAdapter.java:176) at org.jboss.byteman.objectweb.asm.tree.JumpInsnNode.accept(JumpInsnNode.java:83) at org.jboss.byteman.objectweb.asm.tree.InsnList.accept(InsnList.java:170) at org.jboss.byteman.objectweb.asm.tree.MethodNode.accept(MethodNode.java:470) at org.jboss.byteman.objectweb.asm.commons.JSRInlinerAdapter.visitEnd(JSRInlinerAdapter.java:153) at org.jboss.byteman.objectweb.asm.ClassReader.accept(ClassReader.java:1450) at org.jboss.byteman.objectweb.asm.ClassReader.accept(ClassReader.java:394) at org.jboss.byteman.agent.TransformContext.transform(TransformContext.java:150) at org.jboss.byteman.agent.Transformer.transform(Transformer.java:674) at org.jboss.byteman.agent.Transformer.tryTransform(Transformer.java:742) at org.jboss.byteman.agent.Transformer.tryTransform(Transformer.java:713) at org.jboss.byteman.agent.Transformer.transform(Transformer.java:243) at sun.instrument.TransformerManager.transform(TransformerManager.java:169) at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) org.jboss.byteman.agent.Transformer : possible trigger for rule trace lock enter in class test.byteman.BytemanBugMonitorEnter RuleTriggerMethodAdapter.injectTriggerPoint : inserting trigger into test.byteman.BytemanBugMonitorEnter.getData(java.lang.String) java.lang.Object for rule trace lock enter exits unaccounted for in block B4 org.jboss.byteman.agent.Transformer : unexpected error injecting trigger for rule trace lock enter into class test.byteman.BytemanBugMonitorEnter java.lang.NullPointerException java.lang.NullPointerException at org.jboss.byteman.agent.adapter.cfg.CFG.computeContainment(CFG.java:1108) at org.jboss.byteman.agent.adapter.cfg.CFG.carryForward(CFG.java:962) at org.jboss.byteman.agent.adapter.cfg.CFG.split(CFG.java:1240) at org.jboss.byteman.agent.adapter.RuleTriggerMethodAdapter.visitJumpInsn(RuleTriggerMethodAdapter.java:722) at org.jboss.byteman.objectweb.asm.tree.JumpInsnNode.accept(JumpInsnNode.java:83) at org.jboss.byteman.objectweb.asm.tree.InsnList.accept(InsnList.java:170) at org.jboss.byteman.objectweb.asm.tree.MethodNode.accept(MethodNode.java:470) at org.jboss.byteman.objectweb.asm.commons.JSRInlinerAdapter.visitEnd(JSRInlinerAdapter.java:153) at org.jboss.byteman.objectweb.asm.ClassReader.accept(ClassReader.java:1450) at org.jboss.byteman.objectweb.asm.ClassReader.accept(ClassReader.java:394) at org.jboss.byteman.agent.TransformContext.transform(TransformContext.java:150) at org.jboss.byteman.agent.Transformer.transform(Transformer.java:674) at org.jboss.byteman.agent.Transformer.tryTransform(Transformer.java:742) at org.jboss.byteman.agent.Transformer.tryTransform(Transformer.java:713) at org.jboss.byteman.agent.Transformer.transform(Transformer.java:243) at sun.instrument.TransformerManager.transform(TransformerManager.java:169) at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) org.jboss.byteman.agent.Transformer : possible trigger for rule trace lock exit in class test.byteman.BytemanBugMonitorEnter RuleTriggerMethodAdapter.injectTriggerPoint : inserting trigger into test.byteman.BytemanBugMonitorEnter.getData(java.lang.String) java.lang.Object for rule trace lock exit exits unaccounted for in block B4 org.jboss.byteman.agent.Transformer : unexpected error injecting trigger for rule trace lock exit into class test.byteman.BytemanBugMonitorEnter java.lang.NullPointerException java.lang.NullPointerException at org.jboss.byteman.agent.adapter.cfg.CFG.computeContainment(CFG.java:1108) at org.jboss.byteman.agent.adapter.cfg.CFG.carryForward(CFG.java:962) at org.jboss.byteman.agent.adapter.cfg.CFG.split(CFG.java:1240) at org.jboss.byteman.agent.adapter.RuleTriggerMethodAdapter.visitJumpInsn(RuleTriggerMethodAdapter.java:722) at org.jboss.byteman.objectweb.asm.tree.JumpInsnNode.accept(JumpInsnNode.java:83) at org.jboss.byteman.objectweb.asm.tree.InsnList.accept(InsnList.java:170) at org.jboss.byteman.objectweb.asm.tree.MethodNode.accept(MethodNode.java:470) at org.jboss.byteman.objectweb.asm.commons.JSRInlinerAdapter.visitEnd(JSRInlinerAdapter.java:153) at org.jboss.byteman.objectweb.asm.ClassReader.accept(ClassReader.java:1450) at org.jboss.byteman.objectweb.asm.ClassReader.accept(ClassReader.java:394) at org.jboss.byteman.agent.TransformContext.transform(TransformContext.java:150) at org.jboss.byteman.agent.Transformer.transform(Transformer.java:674) at org.jboss.byteman.agent.Transformer.tryTransform(Transformer.java:742) at org.jboss.byteman.agent.Transformer.tryTransform(Transformer.java:713) at org.jboss.byteman.agent.Transformer.transform(Transformer.java:243) at sun.instrument.TransformerManager.transform(TransformerManager.java:169) at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) start done
I extracted the relevant code snippet and rule (see attached source and rule files). They can be run with the following settings to reproduce the problem:
-javaagent:lib/byteman.jar=script:bug-monitorenter.btm,prop:org.jboss.byteman.verbose=true,prop:org.jboss.byteman.debug=true
Please note, that the problem disappears, when I remove the loop within the synchronization block (see XXX markers in the example code).
