Running test code with tracing enabled.

by gerph 5 years ago

macOS ◆ xterm-256color ◆ fish 878 views

The tracing in Pyromaniac uses Capstone for its disassembly. This saved me a huge amount of time which I might waste on implementing the disassembly myself. That isn’t to say it is perfect. It likes using SVC for SWI (which is the name given by ARM now), and expresses LDMFD and STMFD as POP and PUSH. It also likes to present branches with a # prefix before the address (and obviously all the addresses are expressed as 0x<number>, rather than &<number>). Some of these things I fix up in post-processing.

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You can download this recording in asciicast v2 format, as a .cast file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 264109.cast

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/264109.cast',
      document.getElementById('player'),
      { cols: 70, rows: 57 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't provide GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed, generate a GIF with the following command:

agg https://asciinema.org/a/264109 demo.gif

Or, if you already downloaded the recording file:

agg demo.cast demo.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.