This is a simple library (and a convenient executable) to profile Lua functions.

Usage

Prerequisites

You should have uthash(v1.9.7+) installed into your system.

git clone git://github.com/troydhanson/uthash.git
cp uthash/src/uthash.h /usr/local/include/

Install

Compile and install it by running

DEFINE=-I/usr/local/openresty/luajit/include/luajit-2.0/ make
sudo make install

You can also append PREFIX=xxx when running these commands to install to a different location.

Running

usage: luaprofile -l LUA_LIBRARY [-o LOGFILE] [-L PRELOAD_LIB] COMMAND ...

      -l, --lualib              The Lua library
      -o, --logfile             The log file, if not stderr
      -L, --preloadlib          The 'luaprofile.so' library, if not at default location

environment variables 'LUAP_LIBRARY', 'LUAP_LOGFILE' also work.

example:
luaprofile -l /usr/local/openresty/luajit/lib/libluajit-5.1.so -o ./luap.log ./bin/start.sh

Signals

• Sending a SIGPROF signal will make it print stats on next Lua function call.
• Sending a SIGPWR signal will make it print stats on next Lua function call, free the memory it used and remove the debug hook.

Note

• Lua must be loaded as a dynamic library, not statically linked into the binary you will run.
• Works on Linux. Might also work on Mac OS X / FreeBSD.
• May not work if running as root.