*/
#include "common/c_internal.h"
-#include "server.h"
-#include "cpp_api/scriptapi.h"
+#include "util/numeric.h"
+#include "debug.h"
+#include "log.h"
+#include "porting.h"
+#include "settings.h"
+#include <algorithm> // std::find
-ScriptApi* get_scriptapi(lua_State *L)
+std::string script_get_backtrace(lua_State *L)
{
- // Get server from registry
- lua_getfield(L, LUA_REGISTRYINDEX, "scriptapi");
- ScriptApi* sapi_ptr = (ScriptApi*) lua_touserdata(L, -1);
+ lua_rawgeti(L, LUA_REGISTRYINDEX, CUSTOM_RIDX_BACKTRACE);
+ lua_call(L, 0, 1);
+ std::string result = luaL_checkstring(L, -1);
lua_pop(L, 1);
- return sapi_ptr;
+ return result;
}
-std::string script_get_backtrace(lua_State *L)
+int script_exception_wrapper(lua_State *L, lua_CFunction f)
{
- std::string s;
- lua_getfield(L, LUA_GLOBALSINDEX, "debug");
- if(lua_istable(L, -1)){
- lua_getfield(L, -1, "traceback");
- if(lua_isfunction(L, -1)){
- lua_call(L, 0, 1);
- if(lua_isstring(L, -1)){
- s += lua_tostring(L, -1);
- }
- lua_pop(L, 1);
- }
- else{
- lua_pop(L, 1);
- }
+ try {
+ return f(L); // Call wrapped function and return result.
+ } catch (const char *s) { // Catch and convert exceptions.
+ lua_pushstring(L, s);
+ } catch (std::exception &e) {
+ lua_pushstring(L, e.what());
}
- lua_pop(L, 1);
- return s;
+ return lua_error(L); // Rethrow as a Lua error.
}
-void script_error(lua_State* L,const char *fmt, ...)
+/*
+ * Note that we can't get tracebacks for LUA_ERRMEM or LUA_ERRERR (without
+ * hacking Lua internals). For LUA_ERRMEM, this is because memory errors will
+ * not execute the error handler, and by the time lua_pcall returns the
+ * execution stack will have already been unwound. For LUA_ERRERR, there was
+ * another error while trying to generate a backtrace from a LUA_ERRRUN. It is
+ * presumed there is an error with the internal Lua state and thus not possible
+ * to gather a coherent backtrace. Realistically, the best we can do here is
+ * print which C function performed the failing pcall.
+ */
+void script_error(lua_State *L, int pcall_result, const char *mod, const char *fxn)
{
- va_list argp;
- va_start(argp, fmt);
- char buf[10000];
- vsnprintf(buf, 10000, fmt, argp);
- va_end(argp);
- //errorstream<<"SCRIPT ERROR: "<<buf;
- throw LuaError(L, buf);
+ if (pcall_result == 0)
+ return;
+
+ const char *err_type;
+ switch (pcall_result) {
+ case LUA_ERRRUN:
+ err_type = "Runtime";
+ break;
+ case LUA_ERRMEM:
+ err_type = "OOM";
+ break;
+ case LUA_ERRERR:
+ err_type = "Double fault";
+ break;
+ default:
+ err_type = "Unknown";
+ }
+
+ if (!mod)
+ mod = "??";
+
+ if (!fxn)
+ fxn = "??";
+
+ const char *err_descr = lua_tostring(L, -1);
+ if (!err_descr)
+ err_descr = "<no description>";
+
+ char buf[256];
+ porting::mt_snprintf(buf, sizeof(buf), "%s error from mod '%s' in callback %s(): ",
+ err_type, mod, fxn);
+
+ std::string err_msg(buf);
+ err_msg += err_descr;
+
+ if (pcall_result == LUA_ERRMEM) {
+ err_msg += "\nCurrent Lua memory usage: "
+ + itos(lua_gc(L, LUA_GCCOUNT, 0) >> 10) + " MB";
+ }
+
+ throw LuaError(err_msg);
}
+static void script_log_add_source(lua_State *L, std::string &message, int stack_depth)
+{
+ lua_Debug ar;
+
+ if (lua_getstack(L, stack_depth, &ar)) {
+ FATAL_ERROR_IF(!lua_getinfo(L, "Sl", &ar), "lua_getinfo() failed");
+ message.append(" (at " + std::string(ar.short_src) + ":"
+ + std::to_string(ar.currentline) + ")");
+ } else {
+ message.append(" (at ?:?)");
+ }
+}
+
+bool script_log_unique(lua_State *L, std::string message, std::ostream &log_to,
+ int stack_depth)
+{
+ thread_local std::vector<u64> logged_messages;
+
+ script_log_add_source(L, message, stack_depth);
+ u64 hash = murmur_hash_64_ua(message.data(), message.length(), 0xBADBABE);
+
+ if (std::find(logged_messages.begin(), logged_messages.end(), hash)
+ == logged_messages.end()) {
+
+ logged_messages.emplace_back(hash);
+ log_to << message << std::endl;
+ return true;
+ }
+ return false;
+}
+
+DeprecatedHandlingMode get_deprecated_handling_mode()
+{
+ static thread_local bool configured = false;
+ static thread_local DeprecatedHandlingMode ret = DeprecatedHandlingMode::Ignore;
+
+ // Only read settings on first call
+ if (!configured) {
+ std::string value = g_settings->get("deprecated_lua_api_handling");
+ if (value == "log") {
+ ret = DeprecatedHandlingMode::Log;
+ } else if (value == "error") {
+ ret = DeprecatedHandlingMode::Error;
+ }
+ configured = true;
+ }
+
+ return ret;
+}
+
+void log_deprecated(lua_State *L, std::string message, int stack_depth)
+{
+ DeprecatedHandlingMode mode = get_deprecated_handling_mode();
+ if (mode == DeprecatedHandlingMode::Ignore)
+ return;
+
+ script_log_add_source(L, message, stack_depth);
+ warningstream << message << std::endl;
+
+ if (mode == DeprecatedHandlingMode::Error)
+ script_error(L, LUA_ERRRUN, NULL, NULL);
+ else
+ infostream << script_get_backtrace(L) << std::endl;
+}
projects / minetest.git / blobdiff