[Webkit-unassigned] [Bug 75387] New: Get GDB to display a proper backtrace through JITted functions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=75387

           Summary: Get GDB to display a proper backtrace through JITted
                    functions
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Enhancement
          Priority: P3
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: thedigitalangel at gmail.com


Currently GDB cannot unwind through call frames of JS functions JIT compiled by JSCore.  One new way to fix this is to supply GDB with a plugin that knows how to unwind through such call frames.

The forthcoming patch adds such a plugin (in `Tools/gdb'), JSCPlugin.so and modifies JSCore to work with the plugin.

The patches should work with GDB 7.4 and above.  The plugin can be loaded using the `jit-reader-load', once it is copied to `$(installdir)/lib/gdb'.  ENABLE_GDB_JIT_INTEGRATION in JIT.h needs to be set to 1.

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