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-rw-r--r--games/minimal/mods/errorhandler_test/init.lua106
-rw-r--r--src/script/lua_api/l_server.cpp35
-rw-r--r--src/script/lua_api/l_server.h5
3 files changed, 146 insertions, 0 deletions
diff --git a/games/minimal/mods/errorhandler_test/init.lua b/games/minimal/mods/errorhandler_test/init.lua
new file mode 100644
index 000000000..9d1535c1d
--- /dev/null
+++ b/games/minimal/mods/errorhandler_test/init.lua
@@ -0,0 +1,106 @@
+--
+-- exception handler test module
+--
+--
+-- To avoid this from crashing the module will startup in inactive mode.
+-- to make specific errors happen you need to cause them by following
+-- chat command:
+--
+-- exceptiontest <location> <errortype>
+--
+-- location has to be one of:
+-- * mapgen: cause in next on_generate call
+-- * entity_step: spawn a entity and make it do error in on_step
+-- * globalstep: do error in next globalstep
+-- * immediate: cause right in chat handler
+--
+-- errortypes defined are:
+-- * segv: make sigsegv happen
+-- * zerodivision: cause a division by zero to happen
+-- * exception: throw an exception
+
+if core.cause_error == nil or
+ type(core.cause_error) ~= "function" then
+ return
+end
+
+
+core.log("action", "WARNING: loading exception handler test module!")
+
+local exceptiondata = {
+ tocause = "none",
+ mapgen = false,
+ entity_step = false,
+ globalstep = false,
+}
+
+local exception_entity =
+{
+ on_step = function(self, dtime)
+ if exceptiondata.entity_step then
+ core.cause_error(exceptiondata.tocause)
+ end
+ end,
+}
+local exception_entity_name = "errorhandler_test:error_entity"
+
+local function exception_chat_handler(playername, param)
+ local parameters = param:split(" ")
+
+ if #parameters ~= 2 then
+ core.chat_send_player(playername, "Invalid argument count for exceptiontest")
+ end
+
+ core.log("error", "Causing error at:" .. parameters[1])
+
+ if parameters[1] == "mapgen" then
+ exceptiondata.tocause = parameters[2]
+ exceptiondata.mapgen = true
+ elseif parameters[1] == "entity_step" then
+ --spawn entity at player location
+ local player = core.get_player_by_name(playername)
+
+ if player:is_player() then
+ local pos = player:getpos()
+
+ core.add_entity(pos, exception_entity_name)
+ end
+
+ exceptiondata.tocause = parameters[2]
+ exceptiondata.entity_step = true
+
+ elseif parameters[1] == "globalstep" then
+ exceptiondata.tocause = parameters[2]
+ exceptiondata.globalstep = true
+
+ elseif parameters[1] == "immediate" then
+ core.cause_error(parameters[2])
+
+ else
+ core.chat_send_player(playername, "Invalid error location: " .. dump(parameters[1]))
+ end
+end
+
+core.register_chatcommand("exceptiontest",
+ {
+ params = "<location> <errortype>",
+ description = "cause a given error to happen.\n" ..
+ " location=(mapgen,entity_step,globalstep,immediate)\n" ..
+ " errortype=(segv,zerodivision,exception)",
+ func = exception_chat_handler,
+ privs = { server=true }
+ })
+
+core.register_globalstep(function(dtime)
+ if exceptiondata.globalstep then
+ core.cause_error(exceptiondata.tocause)
+ end
+end)
+
+core.register_on_generated(function(minp, maxp, blockseed)
+ if exceptiondata.mapgen then
+ core.cause_error(exceptiondata.tocause)
+ end
+end)
+
+core.register_entity(exception_entity_name, exception_entity)
diff --git a/src/script/lua_api/l_server.cpp b/src/script/lua_api/l_server.cpp
index 76fe439eb..8d7f6512e 100644
--- a/src/script/lua_api/l_server.cpp
+++ b/src/script/lua_api/l_server.cpp
@@ -24,6 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "server.h"
#include "environment.h"
#include "player.h"
+#include "log.h"
// request_shutdown()
int ModApiServer::l_request_shutdown(lua_State *L)
@@ -449,6 +450,36 @@ int ModApiServer::l_notify_authentication_modified(lua_State *L)
return 0;
}
+#ifndef NDEBUG
+// cause_error(type_of_error)
+int ModApiServer::l_cause_error(lua_State *L)
+{
+ NO_MAP_LOCK_REQUIRED;
+ std::string type_of_error = "none";
+ if(lua_isstring(L, 1))
+ type_of_error = lua_tostring(L, 1);
+
+ errorstream << "Error handler test called, errortype=" << type_of_error << std::endl;
+
+ if(type_of_error == "segv") {
+ volatile int* some_pointer = 0;
+ errorstream << "Cause a sigsegv now: " << (*some_pointer) << std::endl;
+
+ } else if (type_of_error == "zerodivision") {
+
+ unsigned int some_number = porting::getTimeS();
+ unsigned int zerovalue = 0;
+ unsigned int result = some_number / zerovalue;
+ errorstream << "Well this shouldn't ever be shown: " << result << std::endl;
+
+ } else if (type_of_error == "exception") {
+ throw BaseException("Errorhandler test fct called");
+ }
+
+ return 0;
+}
+#endif
+
void ModApiServer::Initialize(lua_State *L, int top)
{
API_FCT(request_shutdown);
@@ -475,4 +506,8 @@ void ModApiServer::Initialize(lua_State *L, int top)
API_FCT(kick_player);
API_FCT(unban_player_or_ip);
API_FCT(notify_authentication_modified);
+
+#ifndef NDEBUG
+ API_FCT(cause_error);
+#endif
}
diff --git a/src/script/lua_api/l_server.h b/src/script/lua_api/l_server.h
index 4101f2856..fd85a8975 100644
--- a/src/script/lua_api/l_server.h
+++ b/src/script/lua_api/l_server.h
@@ -88,6 +88,11 @@ private:
// notify_authentication_modified(name)
static int l_notify_authentication_modified(lua_State *L);
+#ifndef NDEBUG
+ // cause_error(type_of_error)
+ static int l_cause_error(lua_State *L);
+#endif
+
public:
static void Initialize(lua_State *L, int top);