Ruby Debug Gem Notes.md

debug_gem_notes.md

Ruby Debug Gem Notes

Debug control

• show_cmds
• whereami
• l or list
• list 22-28 # Range of lines requested
• show_source "Class or Class#method"
• info # Instance variables, local variables, etc
• step # go for next line/point of execution after the breakpoint (line by line)
• continue # go for next breakpoint or end of program
• next # next step inside the same code, no deeper like step
• break # list all breakpoints or set additional breakpoints
• break 22 # set breakpoint at line 22
• break /path/file.rb:22
• break Class#method
• continue # go for next breakpoint or end of program

Backtracing

• bt or backtrace # List the stack trace // all frames. all things that happened before hitting the breakpoint
• up # move up the stack trace
• down # move down the stack trace
• frame 2 # move to frame 2
• list # list inside frame to show code
• info locals # show local variables

Help

• help <cmd>
• help

Invoking the debugger

• debug # Inside irb invoke debug to start debugging
• binding.b
• binding.break
• debugger