• Etienne Pierre-Doray's avatar
    Revert "Reland "[wasm]: Use CancelAndDetach and barrier on BackgroundCompileJob."" · 393782ef
    Etienne Pierre-Doray authored
    This reverts commit 064ee3c8.
    
    Reason for revert: Causing blink_web_tests to fail on builder "WebKit Linux MSAN"
    https://bugs.chromium.org/p/chromium/issues/detail?id=1153968
    
    Original change's description:
    > Reland "[wasm]: Use CancelAndDetach and barrier on BackgroundCompileJob."
    >
    > Reason for revert: Data race:
    > https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN/34121
    >
    > It was assume that MockPlatform runs everything on 1 thread. However,
    > MockPlatform::PostJob previously would schedule the job through
    > TestPlatform, which eventually posts concurrent tasks, thus causing
    > data race.
    > Fix: Manually calling NewDefaultJobHandle and passing the MockPlatform
    > ensures the jobs also run sequentially.
    >
    > Additional change:
    > - CancelAndDetach is now called in ~CompilationStateImpl() to make sure
    > it's called in sequence with ScheduleCompileJobForNewUnits
    >
    > Original CL description:
    > To avoid keeping around a list of job handles, CancelAndDetach() is
    > used in CancelCompilation. Dependency on WasmEngine is handled by a
    > barrier that waits on all jobs to finish.
    >
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2498659
    > Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
    > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    > Reviewed-by: Clemens Backes <clemensb@chromium.org>
    > Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
    > Cr-Original-Commit-Position: refs/heads/master@{#71074}
    > Change-Id: Ie9556f7f96f6fb9a61ada0e5cbd58d4fb4a0f571
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2559137
    > Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
    > Reviewed-by: Andreas Haas <ahaas@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#71459}
    
    TBR=ulan@chromium.org,jkummerow@chromium.org,ahaas@chromium.org,clemensb@chromium.org,etiennep@chromium.org
    Bug: chromium:1153968, v8:11209, v8:11210, v8:11212
    
    # Not skipping CQ checks because original CL landed > 1 day ago.
    
    Change-Id: I2c8406bea81ee7cf6c5726c2fec50fffdce09611
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2566446Reviewed-by: 's avatarClemens Backes <clemensb@chromium.org>
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#71519}
    393782ef
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