• Michael Achenbach's avatar
    Revert "[heap] Mark RO_SPACE as read-only after deserialization" · d14bca61
    Michael Achenbach authored
    This reverts commit 40f1aaf3.
    
    Reason for revert:
    https://luci-milo.appspot.com/buildbot/client.v8/V8%20Linux%20-%20arm64%20-%20sim%20-%20MSAN/21000
    
    Original change's description:
    > [heap] Mark RO_SPACE as read-only after deserialization
    > 
    > Adds MarkAsReadOnly and MarkAsReadWrite to ReadOnlySpace. The latter
    > is only usable with ReadOnlySpace::WritableScope to avoid the space
    > being left writable). MarkAsReadOnly updates the high water mark and
    > makes several previously mutating methods into no-ops.
    > 
    > Moves some writes to immutable objects out of the bootstrapper to
    > setup-heap-internal so they don't write to a read-only page.
    > 
    > Also avoid writing hashes to strings that already have the value set as
    > that invariably means writing to the "0" and "1" constant strings in
    > RO_SPACE.
    > 
    > Before serialization, it makes RO_SPACE writable again so that any
    > padding can be cleared before writing it.
    > 
    > Bug: v8:7464
    > Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
    > Change-Id: I22edc20dba7dde8943991a8fcaf87244af4490a3
    > Reviewed-on: https://chromium-review.googlesource.com/1014128
    > Commit-Queue: Dan Elphick <delphick@chromium.org>
    > Reviewed-by: Hannes Payer <hpayer@chromium.org>
    > Reviewed-by: Yang Guo <yangguo@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#52943}
    
    TBR=yangguo@chromium.org,hpayer@chromium.org,mlippautz@chromium.org,delphick@chromium.org
    
    Change-Id: Id4770c0fdb21cd9eea2f62a019f44a6bdea8f0a7
    No-Presubmit: true
    No-Tree-Checks: true
    No-Try: true
    Bug: v8:7464
    Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
    Reviewed-on: https://chromium-review.googlesource.com/1041948Reviewed-by: 's avatarMichael Achenbach <machenbach@chromium.org>
    Commit-Queue: Michael Achenbach <machenbach@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#52944}
    d14bca61
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