* [infra][jvm] Add Jazzer UBSan support
* [java-example] Reenable and plant UB
* [docs] Mention support for Java UBSan in docs
Also adds a link to the java-example build.sh to the docs.
Prior to this change, native library loading failed for
two reasons:
1. Loading from current working directory instead of the fuzzer's
directory.
2. Using ASAN_OPTIONS=handle_segv=2.
Fix these issues by doing the following.
1. Adding the fuzzer's directory to LD_LIBRARY_PATH instead of "."
2. Specifying handle_segv=1 in ASAN_OPTIONS.
Related: https://github.com/google/oss-fuzz/issues/5178
The same speculative fix as in #5217.
The current working directory "." should have no reason to be in the
classpath if it is not equal to "$this_dir", hence it is removed.
The java-example project does not pull in any external dependencies, but
rather consists of three basic Java fuzzers that hit a synthetic bug
after a few seconds. The project can be used to verify that ClusterFuzz
correctly handles JVM fuzz targets.
* ExampleFuzzer fails with an assertion.
* ExampleValueProfileFuzzer fails with an exception after a few seconds,
but only if running in value profile mode.
* ExampleFuzzerNative fails with an ASan report.
Fabian Meumertzheim