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Tool implementing Property Probes

License: BSD 3-Clause "New" or "Revised" License

Shell 0.17% JavaScript 43.53% Java 17.17% TypeScript 38.13% CSS 0.60% HTML 0.41%

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codeprober's Issues

Crash due to null node locator when using the nested probe UI with circular attributes

EvaluatePropertyHandler can try to build a Tracing object with a null node locator.

Reported during EDAP15, homework 2024-ex3.
This may or may not be an upstream issue.

Steps to reproduce

./codeprober/code-prober-dev.jar ./code-prober.sh examples/hw3-task-1-0.teal

  • Probe for IfStmt.controlFalse
  • Open nested probe table
  • try to load getCond()

image

Workarounds

Does not seem to trigger with non-recursive probes. Opening a separate probe window for the ControlFalse node works fine:

image

Cause analysis

Incomplete:

Exception in thread "Thread-27" java.lang.NullPointerException
	at codeprober.protocol.data.Tracing.toJSON(Tracing.java:27)
	at codeprober.protocol.data.RpcBodyLine.toJSON(RpcBodyLine.java:156)
	at codeprober.protocol.data.SynchronousEvaluationResult.lambda$toJSON$4(SynchronousEvaluationResult.java:63)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at codeprober.protocol.data.SynchronousEvaluationResult.toJSON(SynchronousEvaluationResult.java:63)
	at codeprober.protocol.data.PropertyEvaluationResult.toJSON(PropertyEvaluationResult.java:57)
	at codeprober.protocol.data.EvaluatePropertyRes.toJSON(EvaluatePropertyRes.java:18)
	at codeprober.protocol.data.RequestAdapter.handle(RequestAdapter.java:21)
	at codeprober.DefaultRequestHandler.handleRequest(DefaultRequestHandler.java:273)
	at codeprober.requesthandler.RequestHandlerMonitor.process(RequestHandlerMonitor.java:64)
	at codeprober.requesthandler.RequestHandlerMonitor.lambda$submit$0(RequestHandlerMonitor.java:27)
	at java.base/java.lang.Thread.run(Thread.java:829)

The immediate underlying cause is an invocation of TracingBuilder.Tracing.finish(null) (where null is not intended as a valid argument):

	at codeprober.requesthandler.TracingBuilder.finish(TracingBuilder.java:102)
	at codeprober.requesthandler.EvaluatePropertyHandler.lambda$apply$3(EvaluatePropertyHandler.java:319)
	at codeprober.requesthandler.EvaluatePropertyHandler.lambda$apply$6(EvaluatePropertyHandler.java:357)
	at codeprober.metaprogramming.StdIoInterceptor.performLiveCaptured(StdIoInterceptor.java:73)
	at codeprober.requesthandler.EvaluatePropertyHandler.lambda$apply$7(EvaluatePropertyHandler.java:354)
	at codeprober.metaprogramming.StdIoInterceptor.performLiveCaptured(StdIoInterceptor.java:73)
	at codeprober.metaprogramming.StdIoInterceptor.performCaptured(StdIoInterceptor.java:82)
	at codeprober.requesthandler.EvaluatePropertyHandler.apply(EvaluatePropertyHandler.java:348)
	at codeprober.DefaultRequestHandler$1.handleEvaluateProperty(DefaultRequestHandler.java:260)
	at codeprober.protocol.data.RequestAdapter.handle(RequestAdapter.java:21)
	at codeprober.DefaultRequestHandler.handleRequest(DefaultRequestHandler.java:273)
	at codeprober.requesthandler.RequestHandlerMonitor.process(RequestHandlerMonitor.java:64)
	at codeprober.requesthandler.RequestHandlerMonitor.lambda$submit$0(RequestHandlerMonitor.java:27)
	at java.base/java.lang.Thread.run(Thread.java:829)
	```
	
Line number might be off a little due to two lines of instrumentation in `TracingBuilder.java`.

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