We need to do what binfile was doing and make the address relative to the
text_offset. We also need to ignore the text offset of the debuglink files
and pass it the text_offset of the original ELF.
This fixes a bunch of symbolization in the callgraph.
If we get an address that doesn't fall within a symbol, we still want to
generate a valid string/address range for it here so that we can get
nick annotations correct. If we hit the fallback path, we won't get that.
We want to know the inode of the FD that was mmaped so that we can check
the requested inode when processing the address map from a particular
process.
We still want to load it into the cache as it could get used by other
symbols/mmap regions, but don't return the ELF if it won't match an inode
or build-id check. Rely on other fallbacks to create fallback symbols
for those use cases.
We need to separate a number of concerns here, such as debug-dirs within
the process namespace vs global debug-dirs (external symbols on a developer
workstation vs IoT/Laptop/VM/alternate-device).
That means we need to be able to resolve paths via the mount namespace of
the process as it was seen in the capture file.
Additionally, we need to follow .gnu_debuglink section headers so that we
can associate the version with symbols with the ELF that is loaded from
the processes SysprofAddressLayout.
