The library is expected to be a unified place for all components to read
both global and per-process memory accounting form kernel including
getting the working set. This change adds the PageInfo, MemInfo and
ProcMemInfo classes and verifies the implementation against libpagemap
for correctness.
Adds a procmem2 tool show the usage.
TODO: Plumbing in os_debug, add vmastats, zoneinfo etc parsing.
Test: libmeminfo_test 1
Test: procmem2 1
Test: procmem2 -h -W 1
Test: procmem2 -h -w 1
Test: libmeminfo_benchmark
Bug: 111694435
Bug: 114325007
Change-Id: I280440b1dc26a498170686d10fcf63f953a0dcbd
Signed-off-by: Sandeep Patil <sspatil@google.com>
