where

The where command shows the call stack for your current process. To print a procedure traceback:

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where

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To print the number top frames in the traceback:

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where number

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To start the traceback from frame number:

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where -f number

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To include hidden frames:

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where -h

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To print only function names:

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where -q

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To include function args and line info:

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where -v

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Any of the previous commands may be followed by a thread or LWP ID to view the call stack.