• Michael Starzinger's avatar
    [wasm] Add support for 'except_ref' value type. · f19a7068
    Michael Starzinger authored
    This adds experimental support for an 'except_ref' value type for caught
    exceptions as per the exception handling proposal. In the current for it
    is only allowed to have such types in the stack or in a local, support
    for having it as part of any signature was left out.
    
    The default value for a local of type 'except_ref' is the 'ref_null'
    value for now. Since this value cannot escape a wasm function, the
    concrete value is not actually observable.
    
    R=ahaas@chromium.org
    TEST=unittests/LocalDeclDecoderTest.ExceptRef,mjsunit/wasm/exceptions
    BUG=v8:8091
    
    Change-Id: I7bd65274327a833262f8749cbe0e24e737f6e0c1
    Reviewed-on: https://chromium-review.googlesource.com/1196510Reviewed-by: 's avatarAndreas Haas <ahaas@chromium.org>
    Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#55526}
    f19a7068
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