This is an explanation of how to do fuzzing of ParseData. This uses github.com/dvyukov/go-fuzz/ for fuzzing.
First, get go-fuzz
$ go get github.com/dvyukov/go-fuzz/go-fuzz
$ go get github.com/dvyukov/go-fuzz/go-fuzz-build
Build the test program by calling the following command (assuming you have files for pprof located in github.com/google/pprof within go's src folder)
$ go-fuzz-build github.com/google/pprof/fuzz
The above command will produce pprof-fuzz.zip
Now you can run the fuzzer by calling
$ go-fuzz -bin=./pprof-fuzz.zip -workdir=fuzz
This will save a corpus of files used by the fuzzer in ./fuzz/corpus, and all files that caused ParseData to crash in ./fuzz/crashers.
For more details on the usage, see github.com/dvyukov/go-fuzz/
Right now, fuzz/corpus contains the corpus initially given to the fuzzer
If using the above commands, fuzz/corpus will be used to generate the initial corpus during fuzz testing.
One can add profiles into the corpus by placing these files in the corpus directory (fuzz/corpus) prior to calling go-fuzz-build.