#$PERLDB

#$^P

The internal variable for debugging support. The meanings of the various bits are subject to change, but currently indicate:

#0x01

Debug subroutine enter/exit.

#0x02

Line-by-line debugging. Causes DB::DB() subroutine to be called for each statement executed. Also causes saving source code lines (like 0x400).

#0x04

Switch off optimizations.

#0x08

Preserve more data for future interactive inspections.

#0x10

Keep info about source lines on which a subroutine is defined.

#0x20

Start with single-step on.

#0x40

Use subroutine address instead of name when reporting.

#0x80

Report goto &subroutine as well.

#0x100

Provide informative "file" names for evals based on the place they were compiled.

#0x200

Provide informative names to anonymous subroutines based on the place they were compiled.

#0x400

Save source code lines into @{"_<$filename"}.

Some bits may be relevant at compile-time only, some at run-time only. This is a new mechanism and the details may change. See also perldebguts.

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