We still have some work to do here so it doesn't mess up the summary
augmentation, but this is a start on re-generating the callgraphs for a
specific symbol.
This uses the intersection of all the bitset from the frame to the root to
first reduce the number of traceables to look at. Once we have the
intersection, we check the traceables for prefix and yield another list
model using that bitset index on the same traceables list model.
This can be used to show a supplimental list of all the traceables for a
callgraph up to certain node.
This allows us to have augmentation at the summary level so that things
like the weighted callgraph or memprof callgraph can add their respective
summary data up the chain of function calls.
This creates a SysprofCallgraph object which is a GListModel of
SysprofCallgraphFrame. The SysprofCallgraphFrame is also a GListModel of
SysprofCallgraphFrame so that we can map this all into a GtkListView in
the future for tree-like visibility.
The augmentation allows for the same callgraph code to be used for multiple
scenarios such as CPU sampling as well as memory allocation tracking.
If your augmentation size is <=sizeof(void*) then you do not occur an extra
allocation and you can use the inline augmentation space.
The test-callgraph clearly shows that we still need to do the shuffling
of -- Kernel -- and -- User -- like the old callgraph code did. But that
will come soon enough.
