OpenJDK HPROF dump parsing library.Based onhttps://hg.openjdk.java.net/jdk/jdk/file/9a73a4e4011f/src/hotspot/share/services/heapDumper.cppandhttp://hg.openjdk.java.net/jdk6/jdk6/jdk/raw-file/tip/src/share/demo/jvmti/hprof/manual.htmlCurrently, the supported ID sizes (actually, pointer sizes) are 4 and 8.The library provides a streaming interface (iterator over dumprecords).  Class structure information and string dictionary are keptin memory as they are required for unpacking object data.There are two modes of operation: reading from std::io::BufRead withStreamHprofReader::read_hprof_from_stream (strings arereturned as Vec<u8>) and from memory withStreamHprofReader::read_hprof_from_memory (strings are returned as&'memory [u8], where 'memory is memory lifetime).Values stored in Record::String (i.e. strings by themselves) do not alwayshave valid UTF-8 data, that's why they are returned as byte vectors/slices.Strings are returned as Record::String(id, data), andfrom object dump, these strings are refered by their id; thiscrate doesn't resolve these ids into strings (and objects are notresolved either), you have to keep id->data mapping by yourself.Author: Ivan Boldyrev <lispnik@gmail.com>