Added memory tracer

2 files changed, 28 insertions, 2 deletions

diff --git a/libs/core/luasrc/debug.lua b/libs/core/luasrc/debug.lua
index a56400f343..f991ab8a60 100644
--- a/libs/core/luasrc/debug.lua
+++ b/libs/core/luasrc/debug.lua
@@ -1,2 +1,25 @@
-module("luci.debug", package.seeall)
-__file__ = debug.getinfo(1, 'S').source:sub(2)
\ No newline at end of file
+local debug = require "debug"
+local io = require "io"
+local collectgarbage = collectgarbage
+
+module "luci.debug"
+__file__ = debug.getinfo(1, 'S').source:sub(2)
+
+-- Enables the memory tracer with given flags and returns a function to disable the tracer again
+function trap_memtrace(flags)
+	flags = flags or "l"
+	local tracefile = io.open("/tmp/memtrace", "w")
+
+	local function trap(what, line)
+		local info = debug.getinfo(2, "Sn")
+		tracefile:write(info.source..":"..line.."\t"..(info.namewhat or "").."\t"..(info.name or "").."\t"..collectgarbage("count").."\n")
+	end
+
+	debug.sethook(trap, flags)
+
+	return function()
+		debug.sethook()
+		tracefile:close()
+	end
+end
+
diff --git a/libs/web/luasrc/dispatcher.lua b/libs/web/luasrc/dispatcher.lua
index fd2be1eb4e..12093fe7a4 100644
--- a/libs/web/luasrc/dispatcher.lua
+++ b/libs/web/luasrc/dispatcher.lua
@@ -112,11 +112,14 @@ function httpdispatch(request)
 	end
 	
 	luci.http.close()
+
+	--context._disable_memtrace()
 end
 
 --- Dispatches a LuCI virtual path.
 -- @param request	Virtual path
 function dispatch(request)
+	--context._disable_memtrace = require "luci.debug".trap_memtrace()
 	local ctx = context
 	ctx.path = request