• Matheus Marchini's avatar
    interpreter: make interpreted frames distinguishable in the native stack · ada64b58
    Matheus Marchini authored
    Before Turbofan/Ignition it was possible to use external profilers to
    sample running V8/Node.js processes and generate reports/FlameGraphs
    from that. It's still possible to do so, but non-optimized JavaScript
    functions appear in the stack as InterpreterEntryTrampoline. This commit
    adds a runtime flag which makes interpreted frames visible on the
    process' native stack as distinguishable functions, making the sampled
    data gathered by external profilers such as Linux perf and DTrace more
    useful.
    
    R=bmeurer@google.com, franzih@google.com, jarin@google.com, yangguo@google.com
    
    Bug: v8:7155
    Change-Id: I3dc8876aa3cd9f1b9766624842a7cc354ccca415
    Reviewed-on: https://chromium-review.googlesource.com/959081
    Commit-Queue: Yang Guo <yangguo@chromium.org>
    Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
    Reviewed-by: 's avatarYang Guo <yangguo@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#52533}
    ada64b58
js-create-lowering.cc 84.1 KB