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107 lines
2.8 KiB
Lua
107 lines
2.8 KiB
Lua
--
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-- exception handler test module
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--
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--
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-- To avoid this from crashing the module will startup in inactive mode.
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-- to make specific errors happen you need to cause them by following
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-- chat command:
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--
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-- exceptiontest <location> <errortype>
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--
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-- location has to be one of:
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-- * mapgen: cause in next on_generate call
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-- * entity_step: spawn a entity and make it do error in on_step
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-- * globalstep: do error in next globalstep
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-- * immediate: cause right in chat handler
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--
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-- errortypes defined are:
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-- * segv: make sigsegv happen
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-- * zerodivision: cause a division by zero to happen
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-- * exception: throw an exception
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if core.cause_error == nil or
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type(core.cause_error) ~= "function" then
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return
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end
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core.log("action", "WARNING: loading exception handler test module!")
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local exceptiondata = {
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tocause = "none",
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mapgen = false,
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entity_step = false,
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globalstep = false,
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}
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local exception_entity =
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{
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on_step = function(self, dtime)
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if exceptiondata.entity_step then
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core.cause_error(exceptiondata.tocause)
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end
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end,
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}
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local exception_entity_name = "errorhandler_test:error_entity"
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local function exception_chat_handler(playername, param)
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local parameters = param:split(" ")
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if #parameters ~= 2 then
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core.chat_send_player(playername, "Invalid argument count for exceptiontest")
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end
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core.log("error", "Causing error at:" .. parameters[1])
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if parameters[1] == "mapgen" then
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exceptiondata.tocause = parameters[2]
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exceptiondata.mapgen = true
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elseif parameters[1] == "entity_step" then
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--spawn entity at player location
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local player = core.get_player_by_name(playername)
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if player:is_player() then
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local pos = player:getpos()
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core.add_entity(pos, exception_entity_name)
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end
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exceptiondata.tocause = parameters[2]
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exceptiondata.entity_step = true
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elseif parameters[1] == "globalstep" then
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exceptiondata.tocause = parameters[2]
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exceptiondata.globalstep = true
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elseif parameters[1] == "immediate" then
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core.cause_error(parameters[2])
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else
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core.chat_send_player(playername, "Invalid error location: " .. dump(parameters[1]))
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end
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end
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core.register_chatcommand("exceptiontest",
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{
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params = "<location> <errortype>",
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description = "cause a given error to happen.\n" ..
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" location=(mapgen,entity_step,globalstep,immediate)\n" ..
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" errortype=(segv,zerodivision,exception)",
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func = exception_chat_handler,
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privs = { server=true }
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})
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core.register_globalstep(function(dtime)
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if exceptiondata.globalstep then
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core.cause_error(exceptiondata.tocause)
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end
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end)
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core.register_on_generated(function(minp, maxp, blockseed)
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if exceptiondata.mapgen then
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core.cause_error(exceptiondata.tocause)
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end
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end)
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core.register_entity(exception_entity_name, exception_entity)
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