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Lua error messages improved

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This commit is contained in:
Joachim Stolberg 2019-01-08 21:46:04 +01:00
parent f1fc163628
commit df9d252f61
1 changed files with 11 additions and 6 deletions
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17
safer_lua/environ.lua
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@ -60,6 +60,13 @@ function safer_lua.config(max_code_size, max_table_size)
safer_lua.MaxTableSize = max_table_size
end
local function format_error(err, tab)
err = err:gsub('%[string "%-%-.-"%]:', "in "..tab.." line ")
err = err:gsub('in main chunk.+', "")
err = err:gsub('%.%.%..-:%d+:', "Error")
return err
end
local function compile(pos, text, label, err_clbk)
if safer_lua:check(pos, text, label, err_clbk) == 0 then
text = text:gsub("%$", "S:")
@ -91,10 +98,9 @@ function safer_lua.init(pos, init, loop, environ, err_clbk)
env.S = {}
env.S = map(env.S, environ)
setfenv(code, env)
local res, err = pcall(code)
local res, err = xpcall(code, debug.traceback)
if not res then
err = err:gsub("%[string .+%]:", "init() ")
err_clbk(pos, err)
err_clbk(pos, format_error(err, "init()"))
else
env = getfenv(code)
code = compile(pos, loop, "loop() ", err_clbk)
@ -115,14 +121,13 @@ function safer_lua.run_loop(pos, elapsed, code, err_clbk)
env.event = false
env.ticks = env.ticks + 1
end
local res, err = pcall(code)
local res, err = xpcall(code, debug.traceback)
if calc_used_mem_size(env) > safer_lua.MaxTableSize then
err_clbk(pos, "Memory limit exceeded")
return false
end
if not res then
err = err:gsub("%[string .+%]:", "loop() ")
err_clbk(pos, err)
err_clbk(pos, format_error(err, "loop()"))
return false
end
return true