[Webkit-unassigned] [Bug 168259] New: asyncDisassembly crashes on iOS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=168259

            Bug ID: 168259
           Summary: asyncDisassembly crashes on iOS
    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: msaboff at apple.com

It crashes with Bus Error right after emitting the jitWrite thunk.

Looks like this is due to the mapping of the jitWrite thunk pages being changed to execute only immediately after generating and linking the code.  With async disassembly, we can't read the code to disassemble.

<rdar://problem/30124488>

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