tree 0af70bde4f454b0e53074d9711b2587cbb9234ed
parent e524732d0668808636b5ccd33dc63c8798241f87
author Sami Kyostila <skyostil@google.com> 1574784313 +0000
committer Sami Kyostila <skyostil@google.com> 1574784313 +0000

TrackEvent: Add support for debug annotations

This patch makes it possible to attach one or two debug annotations to a
trace event, e.g.:

    TRACE_EVENT_BEGIN("cat", "Name", "color", 0xffaaccee, "density", .5f);

The user can also specify a custom debug annotation object that will
get serialized to the DebugAnnotation proto through a callback. This is
intended for implementing the legacy TracedValue system on top of
TrackEvent.

Bug: 132678367
Change-Id: I769c2eb346d3bdfac50158a333481f83962bfb6b