This internal type is used to collect things about a process like the
memory maps, address layout, and symbol cache. This can persist once
parsed at startup, then applied to objects created on demand such as the
SysprofDocumentProcess or used by symbolizers internally rather than
complicated function arguments.
This relies on begin/end range for the symbols to create something akin to
an interval tree, albeit with GSequence. If performance needs to be
addressed, can probably augment SysprofSymbol for an interval rbtree.
This isn't what it will look like in final form, just get the minimum
there for us to use it with the bundled decoder (copied from libsysprof
with adaptations).
Now that we have a lot of this indexed, it's fast enough to do on the
calling thread.
# Conflicts:
# src/libsysprof-analyze/sysprof-document.c
# src/libsysprof-analyze/sysprof-document.h
