lua-trace/trace.lua at master · cloudwu/lua-trace · GitHub

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localdebug=debug
localprint=print
localipairs=ipairs
localpairs=pairs
localstring=string
localrawget=rawget

localinfo= { file= {} }

localtrace= {}
trace.print=print

localfunctionsetname(level)
info.filename=debug.getinfo(level+1,"S").short_src
ifinfo.file[info.filename] ==nilthen
info.file[info.filename] = {}
end
info.var=info.file[info.filename]
end

localfunctionsplit(name)
localkeys= {}
forkeyinname:gmatch("[^.]+") do
keys[#keys+1] =key
end
returnkeys
end

localfunctionget_table_field(tbl,keys)
fori,keyinipairs(keys) do
iftbl[key] then
tbl=tbl[key]
else
returnnil
end
end
returntbl
end

localfunctionis_table_field(var_name,name,v)
iftype(v) =="table" then
locallen=#name
ifvar_name:sub(1,len) ==nameandvar_name:sub(len+1,len+1) =="." then
returntrue
end
end
returnfalse
end

localfunctionmake_local(index,name,is_field)
returnfunction()
local_ , value=debug.getlocal(4 , index)
ifnotis_fieldthen
returnname,"local",value
else
localkeys=split(name)
table.remove(keys,1)
returnname,"local",get_table_field(value,keys)
end
end
end

localfunctionmake_upvalue(func, index,name,is_field)
returnfunction()
local_, value=debug.getupvalue(func, index)
ifnotis_fieldthen
returnname,"upvalue",value
else
localkeys=split(name)
table.remove(keys,1)
returnname,"upvalue",get_table_field(value,keys)
end
end
end

localfunctionmake_global(env, name)
returnfunction()
ifrawget(env,name) then
returnname,"global",rawget(env,name)
else
localkeys=split(name)
returnname,"global",get_table_field(env,keys)
end
end
end

localfunctiongen_var(var_name, level)
locali=1
whiletruedo
localname,v=debug.getlocal(5,i)
ifname==var_namethen
returnmake_local(i,var_name)
end
ifis_table_field(var_name,name,v) then
returnmake_local(i,var_name,true)
end
ifname==nilthen
break
end
i=i+1
end
i=1
localf=debug.getinfo(5, "f").func
whiletruedo
localname, v=debug.getupvalue(f,i)
ifname==var_namethen
returnmake_upvalue(f,i,var_name)
end
ifis_table_field(var_name,name,v) then
returnmake_upvalue(f,i,var_name,true)
end
ifname==nilthen
break
end
i=i+1
end
localname,env=debug.getupvalue(f,1)
ifname=='_ENV' then
returnmake_global(env, var_name)
end
end

localfunctiongen_vars(var, call)
localret= {}
for_,kinipairs(var) do
localf=gen_var(k, call)
iffthen
table.insert(ret, f)
end
end
returnret
end

localfunctionhookline(var , call, line)
trace.print(info.filename, ":" , line)
ifinfo.var[line] ==nilthen
info.var[line] =gen_vars(var, call)
end

for_,vinipairs(info.var[line]) do
localname , type , value=v()
ifinfo.last[name] ~=valuethen
trace.print(name , type, value)
info.last[name] =value
end
end
end

localfunctionhook(var , level)
localcall=0
localindex= {}
forwinstring.gmatch(var, "%S+") do
table.insert(index,w)
end
localfunctionf (mode, line)
ifmode=='return' then
ifcall<=0then
debug.sethook()
trace.on=nil
return
end
setname(3)
call=call-1
ifcall==levelthen
debug.sethook(f,'crl')
end
elseifmode=='call' then
setname(2)
call=call+1
ifcall>levelthen
debug.sethook(f,'cr')
end
elseifmode=='tail call' then
setname(2)
elseifmode=='line' then
hookline(index , call, line)
end
end

returnf
end

localfunctionup(level, f)
localcall=0
returnfunction(mode)
ifmode=='return' then
call=call+1
ifcall==levelthen
setname(3)
debug.sethook(f,'crl')
end
elseifmode=='call' then
call=call-1
end
end
end

functiontrace.trace(var , level)
iftrace.onthen
return
end

trace.on=true
info.last= {}
debug.sethook(up(2 , hook(varor"" , levelor0)) , 'cr')
end

returntrace