• Clemens Backes's avatar
    [wasm] Fix fallback from PKU to mprotect · dacce720
    Clemens Backes authored
    The {WasmCodeManager::SetThreadWritable} method would return true if
    called in a nested scope, even if PKU is not available. The caller
    cannot tell then whether permission switching happened or not.
    
    This CL refactors the code to do an explicit check for PKU support, and
    removes the boolean return value from {SetThreadWritable}.
    
    R=jkummerow@chromium.org
    
    Bug: v8:11959, v8:11974
    Change-Id: I2d45f1fa240305c6f92f63cdf190131d637bfe95
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3021383
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#75699}
    dacce720
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