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copied!<p>As you probably figured out, Apple only has to release parts of the kernel which are taken from other open-source projects, and that doesn't include the userland libraries that they build on top of the kernel. <code>CoreSymbolication/CoreSymbolication.h</code> sounds a lot like a userspace header for Obj-C though, so you can probably build the kernel DTrace utilities without it. (Although I could very well be wrong.)</p> <p>I would guess it's being used for symbol identification in the userland <code>dtrace(1m)</code> command. If only there was a tool that could help us figure this out... :-D</p> <pre><code># dtrace -n 'pid$target:CoreSymbolication::entry {}' -c 'dtrace -ln syscall::write:entry' dtrace: description 'pid$target:CoreSymbolication::entry ' matched 246 probes ID PROVIDER MODULE FUNCTION NAME 147 syscall write entry dtrace: pid 88089 has exited CPU ID FUNCTION:NAME 2 6538 CSSymbolOwnerGetRegionWithName:entry 2 5014 CSSymbolOwnerForeachRegionWithName:entry 2 5078 CSRegionForeachSymbol:entry 2 6495 CSSymbolicatorGetSymbolOwnerWithUUIDAtTime:entry 2 6493 CSSymbolicatorForeachSymbolOwnerWithUUIDAtTime:entry 2 6494 CSSymbolicatorForeachSymbolOwnerWithCFUUIDBytesAtTime:entry 2 5048 CSSymbolOwnerGetDataFlags:entry 2 6538 CSSymbolOwnerGetRegionWithName:entry 2 5014 CSSymbolOwnerForeachRegionWithName:entry 2 5078 CSRegionForeachSymbol:entry 2 5092 CSSymbolIsExternal:entry 2 5092 CSSymbolIsExternal:entry ... </code></pre> <p>It looks like the library is in use by the <code>dtrace</code> command, anyway.</p>

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