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diff --git a/Master/texmf-dist/tex/context/base/trac-tra.lua b/Master/texmf-dist/tex/context/base/trac-tra.lua
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+if not modules then modules = { } end modules ['trac-tra'] = {
+ version = 1.001,
+ comment = "companion to luat-lib.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- the <anonymous> tag is kind of generic and used for functions that are not
+-- bound to a variable, like node.new, node.copy etc (contrary to for instance
+-- node.has_attribute which is bound to a has_attribute local variable in mkiv)
+
+debugger = debugger or { }
+
+local counters = { }
+local names = { }
+local getinfo = debug.getinfo
+local format, find, lower, gmatch = string.format, string.find, string.lower, string.gmatch
+
+-- one
+
+local function hook()
+ local f = getinfo(2,"f").func
+ local n = getinfo(2,"Sn")
+-- if n.what == "C" and n.name then print (n.namewhat .. ': ' .. n.name) end
+ if f then
+ local cf = counters[f]
+ if cf == nil then
+ counters[f] = 1
+ names[f] = n
+ else
+ counters[f] = cf + 1
+ end
+ end
+end
+local function getname(func)
+ local n = names[func]
+ if n then
+ if n.what == "C" then
+ return n.name or '<anonymous>'
+ else
+ -- source short_src linedefined what name namewhat nups func
+ local name = n.name or n.namewhat or n.what
+ if not name or name == "" then name = "?" end
+ return format("%s : %s : %s", n.short_src or "unknown source", n.linedefined or "--", name)
+ end
+ else
+ return "unknown"
+ end
+end
+function debugger.showstats(printer,threshold)
+ printer = printer or texio.write or print
+ threshold = threshold or 0
+ local total, grandtotal, functions = 0, 0, 0
+ printer("\n") -- ugly but ok
+ -- table.sort(counters)
+ for func, count in pairs(counters) do
+ if count > threshold then
+ local name = getname(func)
+ if not name:find("for generator") then
+ printer(format("%8i %s", count, name))
+ total = total + count
+ end
+ end
+ grandtotal = grandtotal + count
+ functions = functions + 1
+ end
+ printer(format("functions: %s, total: %s, grand total: %s, threshold: %s\n", functions, total, grandtotal, threshold))
+end
+
+-- two
+
+--~ local function hook()
+--~ local n = getinfo(2)
+--~ if n.what=="C" and not n.name then
+--~ local f = tostring(debug.traceback())
+--~ local cf = counters[f]
+--~ if cf == nil then
+--~ counters[f] = 1
+--~ names[f] = n
+--~ else
+--~ counters[f] = cf + 1
+--~ end
+--~ end
+--~ end
+--~ function debugger.showstats(printer,threshold)
+--~ printer = printer or texio.write or print
+--~ threshold = threshold or 0
+--~ local total, grandtotal, functions = 0, 0, 0
+--~ printer("\n") -- ugly but ok
+--~ -- table.sort(counters)
+--~ for func, count in pairs(counters) do
+--~ if count > threshold then
+--~ printer(format("%8i %s", count, func))
+--~ total = total + count
+--~ end
+--~ grandtotal = grandtotal + count
+--~ functions = functions + 1
+--~ end
+--~ printer(format("functions: %s, total: %s, grand total: %s, threshold: %s\n", functions, total, grandtotal, threshold))
+--~ end
+
+-- rest
+
+function debugger.savestats(filename,threshold)
+ local f = io.open(filename,'w')
+ if f then
+ debugger.showstats(function(str) f:write(str) end,threshold)
+ f:close()
+ end
+end
+
+function debugger.enable()
+ debug.sethook(hook,"c")
+end
+
+function debugger.disable()
+ debug.sethook()
+--~ counters[debug.getinfo(2,"f").func] = nil
+end
+
+function debugger.tracing()
+ local n = tonumber(os.env['MTX.TRACE.CALLS']) or tonumber(os.env['MTX_TRACE_CALLS']) or 0
+ if n > 0 then
+ function debugger.tracing() return true end ; return true
+ else
+ function debugger.tracing() return false end ; return false
+ end
+end
+
+--~ debugger.enable()
+
+--~ print(math.sin(1*.5))
+--~ print(math.sin(1*.5))
+--~ print(math.sin(1*.5))
+--~ print(math.sin(1*.5))
+--~ print(math.sin(1*.5))
+
+--~ debugger.disable()
+
+--~ print("")
+--~ debugger.showstats()
+--~ print("")
+--~ debugger.showstats(print,3)
+
+trackers = trackers or { }
+
+local data, done = { }, { }
+
+local function set(what,value)
+ if type(what) == "string" then
+ what = aux.settings_to_array(what)
+ end
+ for i=1,#what do
+ local w = what[i]
+ for d, f in next, data do
+ if done[d] then
+ -- prevent recursion due to wildcards
+ elseif find(d,w) then
+ done[d] = true
+ for i=1,#f do
+ f[i](value)
+ end
+ end
+ end
+ end
+end
+
+local function reset()
+ for d, f in next, data do
+ for i=1,#f do
+ f[i](false)
+ end
+ end
+end
+
+function trackers.register(what,...)
+ what = lower(what)
+ local w = data[what]
+ if not w then
+ w = { }
+ data[what] = w
+ end
+ for _, fnc in next, { ... } do
+ local typ = type(fnc)
+ if typ == "function" then
+ w[#w+1] = fnc
+ elseif typ == "string" then
+ w[#w+1] = function(value) set(fnc,value,nesting) end
+ end
+ end
+end
+
+function trackers.enable(what)
+ done = { }
+ set(what,true)
+end
+
+function trackers.disable(what)
+ done = { }
+ if not what or what == "" then
+ trackers.reset(what)
+ else
+ set(what,false)
+ end
+end
+
+function trackers.reset(what)
+ done = { }
+ reset()
+end
+
+function trackers.list() -- pattern
+ local list = table.sortedkeys(data)
+ local user, system = { }, { }
+ for l=1,#list do
+ local what = list[l]
+ if find(what,"^%*") then
+ system[#system+1] = what
+ else
+ user[#user+1] = what
+ end
+ end
+ return user, system
+end