vplot

vplot is a python extension for lldb for visualization of C++ containers as plotly graphs from the debugger.

Installation

The following text assumes that you cloned vplot to ~/vplot.

Install plotly and other dependencies. I use pip.

$ pip install plotly
$ pip install numpy
$ pip install pandas

Install vplot extension for lldb

To do that you can enter the following in lldb everytime you start it.

(lldb) command script import ~/vplot/src/vplot.py

or you can add the line to ~/.lldbinit

vplot commands from lldb

• Show std::vector variable test_vector from lldb at a breakpoint.

(lldb) fr v --summary vplot test_vector

• Set the graph color.

(lldb) vplot color (red|blue|black|green|rgb(r,g,b))

• Clear the graph.

(lldb) vplot clear

Example

To generate the image at the beginning, you can use example. To build it:

$ cd ~/
$ mkdir build
$ cd build
$ cmake ../vplot/example
$ make

Start debugging:

$ lldb vplot_example

In the debugger:

(lldb) br s -f main.cpp -l 14 
(lldb) br s -f main.cpp -l 19
(lldb) run 
(lldb) fr v --summary vplot test_vect 

You should see the first graph.

(lldb) vplot color red 
(lldb) cont
(lldb) fr v --summary vplot test_vect1

The second graph should be in red.

Notes

Only std::vector is supported at this time