Ruby Pocket Reference

Ruby Debugger

Usage:

ruby -rdebug filename[, ...]

Commands:

b[reak] [file:|class:](line|method)b[reak] [ class.](line|method)

Sets breakpoint to some position.

wat[ch] expression

Sets watchpoint to some expression.

cat[ch] (exception|off)

Sets catchpoint to an exception.

b[reak]

Lists breakpoints.

cat[ch]

Shows catchpoint.

del[ete][nnn]

Deletes some or all breakpoints.

disp[lay] expression

Adds expression into display expression list.

undisp[lay][nnn]

Deletes one particular or all display expressions.

c[ont]

Runs until program ends or hits breakpoint.

s[tep]nnn

Steps (into methods) one line or until line nnn.

n[ext] nnn

Goes over one line or until line nnn.

w[here]

Displays frames.

f[rame]

Alias for where.

l[ist][ (-|nn-mm)

Lists program, - lists backward.

nn-mm

Lists given lines.

up[nn]

Move to higher frame.

down[nn]

Moves to lower frame.

fin[ish]

Returns to outer frame.

tr[ace] (on|off)

Sets trace mode of current thread.

tr[ace] (on|off) all

Sets trace mode of all threads.

q[uit]

Exits from debugger.

v[ar] g[lobal]

Shows global variables.

v[ar] l[ocal]

Shows local variables.

v[ar] i[nstance] object

Shows instance variables of object.

v[ar] c[onst] object

Shows constants of object.

m[ethod] i[nstance] object

Shows methods of object.

m[ethod] (class|module)

Shows instance methods of class or module.

th[read] l[ist]

Lists all threads.

th[read] c[ur[rent]]

Shows current thread.

th[read] [sw[itch]] nnn

Switches thread context to nnn.

th[read] stop nnn

Stops thread nnn.

th[read] resume nnn

Resumes thread nnn.

p expression

Evaluates expression and print ...