libs/core/luasrc/debug.lua

   1 local debug = require "debug"
   2 local io = require "io"
   3 local collectgarbage = collectgarbage
   4
   5 module "luci.debug"
   6 __file__ = debug.getinfo(1, 'S').source:sub(2)
   7
   8 -- Enables the memory tracer with given flags and returns a function to disable the tracer again
   9 function trap_memtrace(flags, dest)
  10         flags = flags or "clr"
  11         local tracefile = io.open(dest or "/tmp/memtrace", "w")
  12
  13         local function trap(what, line)
  14                 local info = debug.getinfo(2, "Sn")
  15                 if tracefile then
  16                         tracefile:write(
  17                                 "[", what, "] ", info.source, ":", (line or "?"), "\t",
  18                                 (info.namewhat or ""), "\t",
  19                                 (info.name or ""), "\t",
  20                                 collectgarbage("count"), "\n"
  21                         )
  22                 end
  23         end
  24
  25         debug.sethook(trap, flags)
  26
  27         return function()
  28                 debug.sethook()
  29                 tracefile:close()
  30         end
  31 end
  32