Perl debugger commands

🚀 Invoking & Quitting

• perl -d script.pl — Start the Perl debugger for a script.
  
  
• q — Quit the debugger.
  
  

Note: All commands below are executed from within the active debugger prompt.

📜 Listing & Viewing Source Code

• l — List the next window of lines.
  
  
• l line_number — List code around a specific line number.
  
  
• l subroutine_name — List the first window of lines from a specified subroutine.
  
  
• v — View lines of code around the current execution line.
  
  

🛑 Managing Breakpoints

• b — Set a breakpoint at the current line.
  
  
• b line_number [condition] — Set a breakpoint before a specified line (optional condition, e.g., b 12 $color == "red").
  
  
• b subroutine_name [condition] — Set a breakpoint before a specified subroutine (optional condition; note that if subroutine_name is a code reference variable, conditions cannot be used).
  
  
• L b — List all defined breakpoints.
  
  
• B line_number — Delete a breakpoint from a specified line.
  
  
• B * — Delete all breakpoints.
  
  

⚡ Stepping Through the Code

• s — Execute a single statement, descending into subroutine calls (Step Into).
  
  
• n — Execute a single statement, without descending into subroutine calls (Step Over).
  
  
• r — Execute all statements until the return of the current subroutine.
  
  
• c — Continue execution:
  
  
  • c — Run with no breakpoint.
    
    
  • c line_number — Run and insert a one-time-only temporary breakpoint at a line.
    
    
  • c subroutine_name — Run and insert a one-time-only temporary breakpoint at a subroutine.