[Webkit-unassigned] [Bug 223911] New: Ensure that GlobalPropertyInfo is allocated on the stack.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Mar 29 21:18:56 PDT 2021


https://bugs.webkit.org/show_bug.cgi?id=223911

            Bug ID: 223911
           Summary: Ensure that GlobalPropertyInfo is allocated on the
                    stack.
           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: mark.lam at apple.com

We rely on GlobalPropertyInfo being allocated on the stack to allow its JSValue value to be scanned by the GC.  Unfortunately, an ASAN compilation would choose to allocate the GlobalPropertyInfo on a side buffer instead of directly on the stack.  This prevents the GC doing the needed scan.

We'll fix this by suppressing ASAN on the functions that allocated GlobalPropertyInfo arrays.

rdar://75865742

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