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-rw-r--r--lualibs-util-deb.lua128
1 files changed, 128 insertions, 0 deletions
diff --git a/lualibs-util-deb.lua b/lualibs-util-deb.lua
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+if not modules then modules = { } end modules ['util-deb'] = {
+ version = 1.001,
+ comment = "companion to luat-lib.mkiv",
+ 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)
+
+local debug = require "debug"
+
+local getinfo = debug.getinfo
+local type, next, tostring = type, next, tostring
+local format, find = string.format, string.find
+local is_boolean = string.is_boolean
+
+utilities = utilities or { }
+local debugger = utilities.debugger or { }
+utilities.debugger = debugger
+
+local counters = { }
+local names = { }
+
+local report = logs.reporter("debugger")
+
+-- one
+
+local function hook()
+ local f = getinfo(2) -- "nS"
+ if f then
+ local n = "unknown"
+ if f.what == "C" then
+ n = f.name or '<anonymous>'
+ if not names[n] then
+ names[n] = format("%42s",n)
+ end
+ else
+ -- source short_src linedefined what name namewhat nups func
+ n = f.name or f.namewhat or f.what
+ if not n or n == "" then
+ n = "?"
+ end
+ if not names[n] then
+ names[n] = format("%42s : % 5i : %s",n,f.linedefined or 0,f.short_src or "unknown source")
+ end
+ end
+ counters[n] = (counters[n] or 0) + 1
+ end
+end
+
+function debugger.showstats(printer,threshold) -- hm, something has changed, rubish now
+ printer = printer or report
+ threshold = threshold or 0
+ local total, grandtotal, functions = 0, 0, 0
+ local dataset = { }
+ for name, count in next, counters do
+ dataset[#dataset+1] = { name, count }
+ end
+ table.sort(dataset,function(a,b) return a[2] == b[2] and b[1] > a[1] or a[2] > b[2] end)
+ for i=1,#dataset do
+ local d = dataset[i]
+ local name = d[1]
+ local count = d[2]
+ if count > threshold and not find(name,"for generator") then -- move up
+ printer(format("%8i %s\n", count, names[name]))
+ total = total + count
+ end
+ grandtotal = grandtotal + count
+ functions = functions + 1
+ end
+ printer("\n")
+ printer(format("functions : % 10i\n", functions))
+ printer(format("total : % 10i\n", total))
+ printer(format("grand total: % 10i\n", grandtotal))
+ printer(format("threshold : % 10i\n", threshold))
+end
+
+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
+
+--~ 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)
+
+-- from the lua book:
+
+function traceback()
+ local level = 1
+ while true do
+ local info = debug.getinfo(level, "Sl")
+ if not info then
+ break
+ elseif info.what == "C" then
+ print(format("%3i : C function",level))
+ else
+ print(format("%3i : [%s]:%d",level,info.short_src,info.currentline))
+ end
+ level = level + 1
+ end
+end