[Webkit-unassigned] [Bug 280974] New: [JSC] Extend FastJITPermissions scaffolding to other permissions-toggling applications
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Oct 7 07:55:51 PDT 2024
https://bugs.webkit.org/show_bug.cgi?id=280974
Bug ID: 280974
Summary: [JSC] Extend FastJITPermissions scaffolding to other
permissions-toggling applications
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: marcus_plutowski at apple.com
rdar://137426755
FastJITPermissions exposes a convenient interface for atomically write-protecting executable memory: it makes it possible to flip the permissions of JIT memory between RW and RX without any gap inbetween. Currently that is the only use for this interface, but it is easy to think of others: for example, toggling memory between RW and RO permissions. While it may use different mechanisms under the hood, unifying the abstractions would be helpful for codebase cleanliness and ease of understanding. We should investigate whether there are already opportunities present elsewhere in the code-base that could be unified with this one.
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