Files
mruby-mruby/mrbgems/mruby-bin-debugger
Yukihiro "Matz" Matsumoto b9007a8f0a cmdprint.c: extract next_print_no() helper
Consolidate the duplicated print_no increment-and-wrap logic
from dbgcmd_print() and dbgcmd_info_local() into a single
next_print_no() function.

Co-authored-by: Claude <noreply@anthropic.com>
2026-02-24 09:05:02 +09:00
..
2025-07-01 20:57:52 +09:00

mruby-bin-debugger

mrdb is the mruby debugger for debugging Ruby scripts.

Usage

mrdb [switches] programfile

Options

  • -b - load and execute RiteBinary (mrb) file
  • -d - specify source directory
  • --version - print the version
  • --copyright - print the copyright

Debugger Commands

Command Abbreviation Description
break b Set a breakpoint
continue c Continue execution
delete d Delete breakpoints
disable dis Disable breakpoints
enable en Enable breakpoints
eval ev Evaluate expression
help h Show help
info breakpoints i b Show breakpoint information
info locals i l Show local variables
list l List source code
print p Print expression value
quit q Quit debugger
run r Run program
step s Step into
next n Step over

Examples

# Start debugging a script
mrdb script.rb

# Debug a compiled binary with source directory
mrdb -b -d /path/to/source script.mrb

Debugging Session Example

$ mrdb script.rb
(mrdb) b 10           # Set breakpoint at line 10
(mrdb) r              # Run the program
(mrdb) p variable     # Print variable value
(mrdb) n              # Step to next line
(mrdb) i l            # Show local variables
(mrdb) c              # Continue execution
(mrdb) q              # Quit

License

MIT License - see the mruby LICENSE file.