• Clemens Backes's avatar
    Reland "[wasm][debug] Fix tier down for multiple isolates" · e62a7f76
    Clemens Backes authored
    This is a reland of 902f48bd, fixed
    to avoid lock inversion problems detected by TSan.
    
    Original change's description:
    > [wasm][debug] Fix tier down for multiple isolates
    >
    > If multiple isolates are using the same module, we need to keep it
    > tiered down as long as any isolate still has a debugger open.
    > Also, we cannot short-cut the {NativeModule::TierDown} method, since the
    > previously triggered tier down might not have finished yet.
    > For now, each isolate starts an independent tier down (i.e. a full
    > recompilation). We could optimize this later by skipping functions that
    > are already tiered down, or are already scheduled for tier down, but we
    > still need to wait for tier-down to finish on each isolate.
    >
    > R=thibaudm@chromium.org
    >
    > Bug: v8:10359
    > Change-Id: I7ea6a6f5d3977e48718ac5bc94f9831541f6173f
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2190758
    > Commit-Queue: Clemens Backes <clemensb@chromium.org>
    > Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#67716}
    
    Bug: v8:10359
    Cq-Include-Trybots: luci.v8.try:v8_linux64_tsan_rel
    Cq-Include-Trybots: luci.v8.try:v8_linux64_tsan_isolates_rel_ng
    Change-Id: Ie98cf073fc79e5c6991df6d4466de7b560274070
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2194451
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Reviewed-by: 's avatarThibaud Michaud <thibaudm@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#67754}
    e62a7f76
runtime-test.cc 52.1 KB