• Aleksey Kozyatinskiy's avatar
    Revert "[debug] introduced runtime side effect check" · 539a2443
    Aleksey Kozyatinskiy authored
    This reverts commit 7a2c3713.
    
    Reason for revert: msan is broken
    
    Original change's description:
    > [debug] introduced runtime side effect check
    > 
    > This CL demonstrates minimum valuable addition to existing debug evaluate
    > without side effects mechanism.
    > With this CL user can evaluate expressions like:
    > [a,b] // create any kind of temporary array literals
    > [a,b].reduce((x,y) => x + y, 0); // use reduce method
    > [1,2,3].fill(2); // change temporary arrays
    > 
    > The core idea: any change of the object created during evaluation without
    > side effects is side effect free. As soon as we try to store this temporary
    > object to object existed before evaluation we will terminate execution.
    > 
    > Implementation:
    > - track all objects allocated during evaluation and mark them as temporary,
    > - patch all bytecodes which change objects.
    > 
    > A little more details (including performance analysis): [1].
    > 
    > [1] https://docs.google.com/document/d/10qqAtZADspPnpYa6SEdYRxrddfKIZJIzbLtGpsZQkRo/edit#
    > 
    > Bug: v8:7588
    > Change-Id: I69f7b96e1ebd7ad0022219e8213211c7be72a111
    > Reviewed-on: https://chromium-review.googlesource.com/972615
    > Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
    > Reviewed-by: Yang Guo <yangguo@chromium.org>
    > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#52370}
    
    TBR=ulan@chromium.org,rmcilroy@chromium.org,yangguo@chromium.org,kozyatinskiy@chromium.org,leszeks@chromium.org
    
    Change-Id: Ied1739c6308b13a4981189e0999f5912316cf456
    No-Presubmit: true
    No-Tree-Checks: true
    No-Try: true
    Bug: v8:7588
    Reviewed-on: https://chromium-review.googlesource.com/996135Reviewed-by: 's avatarAleksey Kozyatinskiy <kozyatinskiy@chromium.org>
    Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#52371}
    539a2443
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