[Webkit-unassigned] [Bug 66107] New: JSC verbose debugging output sometimes doesn't work as expected.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=66107

           Summary: JSC verbose debugging output sometimes doesn't work as
                    expected.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptGlue
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fpizlo at apple.com


There are a few holes in our verbose debugging output:

CodeBlock::dump():
- Will crash when printing JSCell constants, if converting them to string requires calling into JS code.
- Will crash on op_new_regexp because of an out-of-bounds.

DFG verbose mode:
- Reports only the bottom address of generated code, and not the top, making it somewhat harder to mentally map executing code to the debug dumps.

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