• Clemens Backes's avatar
    [wasm][debug] Support multi-threaded stepping · 97434791
    Clemens Backes authored
    Instead of keeping a single {stepping_frame_} per native module, we now
    keep one frame id per isolate. Hence, each isolate can step through a
    different frame, independent of other isolates.
    The on-stack-replacement of the stepping frame already works on a
    per-isolate basis, since we only replace the return address of a single
    frame, part of the isolate that requested stepping.
    
    The new test (which also executes in a variant with two concurrent
    isolates) revealed some more data races to fix.
    
    R=thibaudm@chromium.org
    
    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: I0bb013737162bd09b9f4be9c08990bca7bf736ac
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2214838Reviewed-by: 's avatarThibaud Michaud <thibaudm@chromium.org>
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#68045}
    97434791
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