tree 5cbacce590bbcc268116d93409860fa50b1e723d
parent 20f90fc20369d8cb50cc04f8f91fdf31d8231fd3
author Florian Mayer <fmayer@google.com> 1544097202 +0000
committer Florian Mayer <fmayer@google.com> 1544097202 +0000

profiling: Improve bookeeping.

Now keep a callstack -> (allocated, freed, alloc cnt, free cnt) mapping
in the HeapTracker.

Keep track of allocated and freed bytes. This allows to infer short
lived allocations.

This is needed for incremental dumps supporting multiple concurrent
profiling sessions for the same process.

Test: m
Test: flash walleye
Test: profile system_server

samples: {      # (perfetto.protos.ProfilePacket.HeapSample) size=17B
	callstack_id: 0x0000007be6974ce0
	cumulative_allocated: 0x0000000000000180      # 384
	cumulative_freed    : 0x0000000000000120      # 288
	alloc_count : 0x0000000000000004
	free_count  : 0x0000000000000003
}

Change-Id: I4f1a4caba6a0b2937bc096cd5b1fee549eefcf7c