• Clemens Backes's avatar
    [wasm] Do not allocate guard regions for memory64 · 965e688d
    Clemens Backes authored
    Memory64 currently does not use trap handling, so we should not allocate
    a guard region (10GB total reservation).
    This is implemented by adding a {WasmMemoryFlag} enum in the backing
    store header, which replaces the previous {MemoryIndexType}. The flag is
    not stored with the backing store, as the backing store does not care
    about the index type, and we might want to share the same backing store
    for memory32 and memory64 (if sizes permit this).
    Instead, we (still) store the flag with the WasmMemoryObject and pass it
    to the backing store methods.
    
    R=jkummerow@chromium.org
    
    Bug: v8:10949
    Change-Id: I284b85b98d181ba5e8d454b24bfa48f6ac201be5
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3789506Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
    Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#82038}
    965e688d
backing-store.cc 37.3 KB