[Webkit-unassigned] [Bug 169890] New: WebAssembly: can mprotect ever fail?

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=169890

            Bug ID: 169890
           Summary: WebAssembly: can mprotect ever fail?
    Classification: Unclassified
           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: jfbastien at apple.com
                CC: fpizlo at apple.com, jfbastien at apple.com,
                    keith_miller at apple.com, mark.lam at apple.com,
                    msaboff at apple.com, sbarati at apple.com
            Blocks: 159775

WasmMemory uses mprotect and tries to handle its failure. I'm not sure it should ever fail according to the manpage for MacOS. Linux seems to allow failure if the kernel runs out of memory for its internal data structures, which seems *really* bad.

In both cases I suspect we should just assert out.

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