[Webkit-unassigned] [Bug 143717] New: Add JSC_functionOverrides=<overrides file> debugging tool

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=143717

            Bug ID: 143717
           Summary: Add JSC_functionOverrides=<overrides file> debugging
                    tool
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (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

This tool allows us to do runtime replacement of function bodies with alternatives for debugging purposes.  For example, this is useful when we need to debug VM bugs which manifest in scripts executing in webpages downloaded from remote servers that we don't control.  The tool allows us to augment those scripts with logging or test code to help isolate the bugs.

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