Coverage keep increasing for Tomcat fuzz targets

[henryrneh]

When I am writing fuzz targets for Tomcat, sometimes the coverage will keep increasing until it reaches JAZZER_MAX_NUM_COUNTERS. The Jazzer output shows that Jazzer keep instrumenting JdbcLeakPrevention.

I think this issue is triggered when I call tomcat.start() in the fuzzerTestOneInput.

https://github.com/apache/tomcat/blob/main/java/org/apache/catalina/loader/JdbcLeakPrevention.java

Maybe it's worth looking at how Jazzer interacts with JdbcLeakPrevention.

Thank you! Henry