• Sigurd Schneider's avatar
    [coverage] Add event for coverage reporting · ee8602d3
    Sigurd Schneider authored
    This CL adds a new event that enables the back-end to send coverage
    updates on its own initiative. This event can be triggered via the C++
    method `triggerPreciseCoverageDeltaUpdate` on the agent in a way that
    causes coverage data to be immediatelly collected.
    
    This is useful in the back-end to collect coverage at a certain point
    in time, i.e. when a lifecycle event such as first contentful paint
    occurs.
    
    The previous interface could not support this, because it could not
    reasonably be triggered from C++, and if triggered through the protocol,
    dispatching messages added delay that invalidated the data (i.e. data
    might have been taken too late to be accurate).
    
    TBR=yangguo@chromium.org
    
    Change-Id: I0f7201412a8d64866e6e314e5bc850354c13a9da
    Bug: chromium:1022031
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1992437
    Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
    Reviewed-by: 's avatarSimon Zünd <szuend@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#65864}
    ee8602d3
v8-profiler-agent-impl.h 2.92 KB