Analyze code loads

parca.jl

using JSON3

jitdump = open(JSON3.read, "/home/vchuravy/Downloads/jitdump.json")
pmap = readlines("/home/vchuravy/Downloads/process_map.txt")

struct AddrRange
    start::UInt
    fin::UInt
end
function AddrRange(s::AbstractString)
    start, fin = split(s, '-')
    start = parse(UInt, start, base=16)
    fin = parse(UInt, fin, base=16)
    return AddrRange(start, fin)
end

struct Mapping
    addr::AddrRange
    mode::String
    file::Union{Nothing, String}
end

mappings = Mapping[]
for line in pmap
    entry = split(line)
    if length(entry) == 6
        addr_range, mode, _, _, _, file = entry
    else
        addr_range, mode, _, _, _ = entry
        file = nothing
    end
    push!(mappings, Mapping(AddrRange(addr_range), mode, file))
end

sort!(mappings, by=m->m.addr.start)

Base.in(addr::UInt, range::AddrRange) = range.start <= addr < range.fin


hist = Dict{Mapping, Vector{Dict}}()
for load in jitdump[:CodeLoads]
    addr = UInt(load["CodeAddr"])
    idx = findfirst(m->in(addr, m.addr), mappings)
    if idx === nothing
        @info "Load not part of mappings" load
    end
    map = mappings[idx]
    loads = get!(hist, map) do
        Dict[]
    end
    push!(loads, load)
end

@show sum(length, values(hist))
@show length(jitdump[:CodeLoads])

@show collect(keys(hist))