default 标签跳过 “”的初始化操作||LOAD_DLL_DEBUG_INFO中获取DLL文件名称

在编写调试器时,遇到default标签跳过问题,原因是case中定义并初始化了变量。解决办法是将case内容用花括号包围。本文通过LOAD_DLL_DEBUG_INFO的hFile句柄,利用GetFileNameFromHandle函数获取DLL名称。该函数创建文件映射对象并使用GetMappedFileName转换设备路径为驱动器字母。

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一般情况下,我们很少在case标签下使用{},但是当你遇到这个问题的时候就应该考虑使用{},因为这个问题是因为你在case标签里面定义了变量,并且初始化了它,所以会出现这个default标签跳过的问题,你只需要将你定义初始化变量的case标签中的所有内容使用{}括起来就可以解决这个问题了。

下面这个问题是在写一个调试器时遇到的,我想将加载的DLL文件名称打印出来,在LOAD_DLL_DEBUG_INFO这个结构体中,没有哪个成员变量是可以直接使用打印DLL名称的,所以我们需要通过LOAD_DLL_DEBUG_INFO中的hFile句柄来间接的获取DLL名称,参考博客我在最后会贴出,博主是参考了MSDN,我也打开了MSDN搜索出了那个方法,只是稍微修改了下返回值,这样我就可以直接得到DLL名称并打印了。方法名称是GetFileNameFromHandle,在MSDN中搜索这个函数可以看到原型,原型函数返回值是BOOL类型。我修改后的函数如下:

//通过文件句柄获取文件名
TCHAR* GetFileNameFromHandle(HANDLE hFile)
{
BOOL bSuccess = FALSE;
TCHAR pszFilename[MAX_PATH + 1];
HANDLE hFileMap;


// Get the file si

/* * Tencent is pleased to support the open source community by making xLua available. * Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved. * Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at * http://opensource.org/licenses/MIT * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ #if USE_UNI_LUA using LuaAPI = UniLua.Lua; using RealStatePtr = UniLua.ILuaState; using LuaCSFunction = UniLua.CSharpFunctionDelegate; #else using LuaAPI = XLua.LuaDLL.Lua; using RealStatePtr = System.IntPtr; using LuaCSFunction = XLua.LuaDLL.lua_CSFunction; #endif namespace XLua { using System; using System.Collections.Generic; public class LuaEnv : IDisposable { internal RealStatePtr L; private LuaTable _G; internal ObjectTranslator translator; internal int errorFuncRef = -1; #if THREAD_SAFT || HOTFIX_ENABLE internal object luaEnvLock = new object(); #endif public LuaEnv() { #if THREAD_SAFT || HOTFIX_ENABLE lock(luaEnvLock) { #endif LuaIndexes.LUA_REGISTRYINDEX = LuaAPI.xlua_get_registry_index(); ; // Create State L = LuaAPI.luaL_newstate(); //Init Base Libs LuaAPI.luaopen_xlua(L); LuaAPI.luaopen_i64lib(L); LuaAPI.luaopen_perflib(L); translator = new ObjectTranslator(this, L); translator.createFunctionMetatable(L); translator.OpenLib(L); ObjectTranslatorPool.Instance.Add(L, translator); LuaAPI.lua_atpanic(L, StaticLuaCallbacks.Panic); LuaAPI.lua_pushstdcallcfunction(L, StaticLuaCallbacks.Print); LuaAPI.lua_setglobal(L, "print"); //template engine lib register TemplateEngine.LuaTemplate.OpenLib(L); AddSearcher(StaticLuaCallbacks.LoadBuiltinLib, 2); // just after the preload searcher AddSearcher(StaticLuaCallbacks.LoadFromCustomLoaders, 3); AddSearcher(StaticLuaCallbacks.LoadFromResource, 4); AddSearcher(StaticLuaCallbacks.LoadFromStreamingAssetsPath, -1); DoString(init_xlua, "Init"); init_xlua = null; AddBuildin("socket.core", StaticLuaCallbacks.LoadSocketCore); AddBuildin("socket", StaticLuaCallbacks.LoadSocketCore); AddBuildin("mime.core", StaticLuaCallbacks.LoadMimeCore); AddBuildin("rapidjson", StaticLuaCallbacks.LoadRapidJson); AddBuildin("lpeg", StaticLuaCallbacks.LoadLpeg); AddBuildin("sproto.core", StaticLuaCallbacks.LoadSprotoCore); //AddBuildin("pack", StaticLuaCallbacks.LoadPack); LuaAPI.lua_newtable(L); //metatable of indexs and newindexs functions LuaAPI.xlua_pushasciistring(L, "__index"); LuaAPI.lua_pushstdcallcfunction(L, StaticLuaCallbacks.MetaFuncIndex); LuaAPI.lua_rawset(L, -3); LuaAPI.xlua_pushasciistring(L, Utils.LuaIndexsFieldName); LuaAPI.lua_newtable(L); LuaAPI.lua_pushvalue(L, -3); LuaAPI.lua_setmetatable(L, -2); LuaAPI.lua_rawset(L, LuaIndexes.LUA_REGISTRYINDEX); LuaAPI.xlua_pushasciistring(L, Utils.LuaNewIndexsFieldName); LuaAPI.lua_newtable(L); LuaAPI.lua_pushvalue(L, -3); LuaAPI.lua_setmetatable(L, -2); LuaAPI.lua_rawset(L, LuaIndexes.LUA_REGISTRYINDEX); LuaAPI.xlua_pushasciistring(L, Utils.LuaClassIndexsFieldName); LuaAPI.lua_newtable(L); LuaAPI.lua_pushvalue(L, -3); LuaAPI.lua_setmetatable(L, -2); LuaAPI.lua_rawset(L, LuaIndexes.LUA_REGISTRYINDEX); LuaAPI.xlua_pushasciistring(L, Utils.LuaClassNewIndexsFieldName); LuaAPI.lua_newtable(L); LuaAPI.lua_pushvalue(L, -3); LuaAPI.lua_setmetatable(L, -2); LuaAPI.lua_rawset(L, LuaIndexes.LUA_REGISTRYINDEX); LuaAPI.lua_pop(L, 1); // pop metatable of indexs and newindexs functions LuaAPI.xlua_pushasciistring(L, "xlua_main_thread"); LuaAPI.lua_pushthread(L); LuaAPI.lua_rawset(L, LuaIndexes.LUA_REGISTRYINDEX); translator.Alias(typeof(Type), "System.MonoType"); LuaAPI.lua_getglobal(L, "_G"); translator.Get(L, -1, out _G); LuaAPI.lua_pop(L, 1); errorFuncRef = LuaAPI.get_error_func_ref(L); if (initers != null) { for (int i = 0; i < initers.Count; i++) { initers[i](this, translator); } } translator.CreateArrayMetatable(L); translator.CreateDelegateMetatable(L); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } private static List<Action<LuaEnv, ObjectTranslator>> initers = null; public static void AddIniter(Action<LuaEnv, ObjectTranslator> initer) { if (initers == null) { initers = new List<Action<LuaEnv, ObjectTranslator>>(); } initers.Add(initer); } public LuaTable Global { get { return _G; } } public T LoadString<T>(string chunk, string chunkName = "chunk", LuaTable env = null) { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif if (typeof(T) != typeof(LuaFunction) && !typeof(T).IsSubclassOf(typeof(Delegate))) { throw new InvalidOperationException(typeof(T).Name + " is not a delegate type nor LuaFunction"); } int oldTop = LuaAPI.lua_gettop(L); if (LuaAPI.luaL_loadbuffer(L, chunk, chunkName) != 0) ThrowExceptionFromError(oldTop); if (env != null) { env.push(L); LuaAPI.lua_setfenv(L, -2); } T result = (T)translator.GetObject(L, -1, typeof(T)); LuaAPI.lua_settop(L, oldTop); return result; #if THREAD_SAFT || HOTFIX_ENABLE } #endif } public LuaFunction LoadString(string chunk, string chunkName = "chunk", LuaTable env = null) { return LoadString<LuaFunction>(chunk, chunkName, env); } public object[] DoString(string chunk, string chunkName = "chunk", LuaTable env = null) { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif int oldTop = LuaAPI.lua_gettop(L); int errFunc = LuaAPI.load_error_func(L, errorFuncRef); if (LuaAPI.luaL_loadbuffer(L, chunk, chunkName) == 0) { if (env != null) { env.push(L); LuaAPI.lua_setfenv(L, -2); } if (LuaAPI.lua_pcall(L, 0, -1, errFunc) == 0) { LuaAPI.lua_remove(L, errFunc); return translator.popValues(L, oldTop); } else ThrowExceptionFromError(oldTop); } else ThrowExceptionFromError(oldTop); return null; #if THREAD_SAFT || HOTFIX_ENABLE } #endif } private void AddSearcher(LuaCSFunction searcher, int index) { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif //insert the loader LuaAPI.xlua_getloaders(L); if (!LuaAPI.lua_istable(L, -1)) { throw new Exception("Can not set searcher!"); } uint len = LuaAPI.xlua_objlen(L, -1); index = index < 0 ? (int)(len + index + 2) : index; for (int e = (int)len + 1; e > index; e--) { LuaAPI.xlua_rawgeti(L, -1, e - 1); LuaAPI.xlua_rawseti(L, -2, e); } LuaAPI.lua_pushstdcallcfunction(L, searcher); LuaAPI.xlua_rawseti(L, -2, index); LuaAPI.lua_pop(L, 1); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } public void Alias(Type type, string alias) { translator.Alias(type, alias); } int last_check_point = 0; int max_check_per_tick = 20; static bool ObjectValidCheck(object obj) { return (!(obj is UnityEngine.Object)) || ((obj as UnityEngine.Object) != null); } Func<object, bool> object_valid_checker = new Func<object, bool>(ObjectValidCheck); public void Tick() { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif lock (refQueue) { while (refQueue.Count > 0) { GCAction gca = refQueue.Dequeue(); translator.ReleaseLuaBase(L, gca.Reference, gca.IsDelegate); } } last_check_point = translator.objects.Check(last_check_point, max_check_per_tick, object_valid_checker, translator.reverseMap); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } //兼容API public void GC() { Tick(); } public LuaTable NewTable() { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif int oldTop = LuaAPI.lua_gettop(L); LuaAPI.lua_newtable(L); LuaTable returnVal = (LuaTable)translator.GetObject(L, -1, typeof(LuaTable)); LuaAPI.lua_settop(L, oldTop); return returnVal; #if THREAD_SAFT || HOTFIX_ENABLE } #endif } private bool disposed = false; public void Dispose() { Dispose(true); System.GC.Collect(); System.GC.WaitForPendingFinalizers(); } public virtual void Dispose(bool dispose) { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif if (disposed) return; Tick(); LuaAPI.lua_close(L); ObjectTranslatorPool.Instance.Remove(L); if (translator != null) { translator = null; } L = IntPtr.Zero; disposed = true; #if THREAD_SAFT || HOTFIX_ENABLE } #endif } public void ThrowExceptionFromError(int oldTop) { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif object err = translator.GetObject(L, -1); LuaAPI.lua_settop(L, oldTop); // A pre-wrapped exception - just rethrow it (stack trace of InnerException will be preserved) Exception ex = err as Exception; if (ex != null) throw ex; // A non-wrapped Lua error (best interpreted as a string) - wrap it and throw it if (err == null) err = "Unknown Lua Error"; throw new LuaException(err.ToString()); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } internal struct GCAction { public int Reference; public bool IsDelegate; } Queue<GCAction> refQueue = new Queue<GCAction>(); internal void equeueGCAction(GCAction action) { lock (refQueue) { refQueue.Enqueue(action); } } private string init_xlua = @" local metatable = {} local rawget = rawget local setmetatable = setmetatable local import_type = xlua.import_type local load_assembly = xlua.load_assembly function metatable:__index(key) local fqn = rawget(self,'.fqn') fqn = ((fqn and fqn .. '.') or '') .. key local obj = import_type(fqn) if obj == nil then -- It might be an assembly, so we load it too. obj = { ['.fqn'] = fqn } setmetatable(obj, metatable) elseif obj == true then return rawget(self, key) end -- Cache this lookup rawset(self, key, obj) return obj end -- A non-type has been called; e.g. foo = System.Foo() function metatable:__call(...) error('No such type: ' .. rawget(self,'.fqn'), 2) end CS = CS or {} setmetatable(CS, metatable) typeof = function(t) return t.UnderlyingSystemType end cast = xlua.cast if not setfenv or not getfenv then local function getfunction(level) local info = debug.getinfo(level + 1, 'f') return info and info.func end function setfenv(fn, env) if type(fn) == 'number' then fn = getfunction(fn + 1) end local i = 1 while true do local name = debug.getupvalue(fn, i) if name == '_ENV' then debug.upvaluejoin(fn, i, (function() return env end), 1) break elseif not name then break end i = i + 1 end return fn end function getfenv(fn) if type(fn) == 'number' then fn = getfunction(fn + 1) end local i = 1 while true do local name, val = debug.getupvalue(fn, i) if name == '_ENV' then return val elseif not name then break end i = i + 1 end end end xlua.hotfix = function(cs, field, func) local tbl = (type(field) == 'table') and field or {[field] = func} for k, v in pairs(tbl) do local cflag = '' if k == '.ctor' then cflag = '_c' k = 'ctor' end xlua.access(cs, cflag .. '__Hitfix0_'..k, v) -- at least one pcall(function() for i = 1, 99 do xlua.access(cs, '__Hitfix'..i..'_'..k, v) end end) end end "; public delegate byte[] CustomLoader(ref string filepath); internal List<CustomLoader> customLoaders = new List<CustomLoader>(); //loader : CustomLoader, filepath参数:(ref类型)输入是require的参数,如果需要支持调试,需要输出真实路径。 // 返回值:如果返回null,代表加载该源下无合适的文件,否则返回UTF8编码的byte[] public void AddLoader(CustomLoader loader) { customLoaders.Add(loader); } internal Dictionary<string, LuaCSFunction> buildin_initer = new Dictionary<string, LuaCSFunction>(); public void AddBuildin(string name, LuaCSFunction initer) { if (!initer.Method.IsStatic || !Attribute.IsDefined(initer.Method, typeof(MonoPInvokeCallbackAttribute))) { throw new Exception("initer must be static and has MonoPInvokeCallback Attribute!"); } buildin_initer.Add(name, initer); } //The garbage-collector pause controls how long the collector waits before starting a new cycle. //Larger values make the collector less aggressive. Values smaller than 100 mean the collector //will not wait to start a new cycle. A value of 200 means that the collector waits for the total //memory in use to double before starting a new cycle. public int GcPause { get { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif int val = LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSETPAUSE, 200); LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSETPAUSE, val); return val; #if THREAD_SAFT || HOTFIX_ENABLE } #endif } set { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSETPAUSE, value); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } } //The step multiplier controls the relative speed of the collector relative to memory allocation. //Larger values make the collector more aggressive but also increase the size of each incremental //step. Values smaller than 100 make the collector too slow and can result in the collector never //finishing a cycle. The default, 200, means that the collector runs at "twice" the speed of memory //allocation. public int GcStepmul { get { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif int val = LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSETSTEPMUL, 200); LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSETSTEPMUL, val); return val; #if THREAD_SAFT || HOTFIX_ENABLE } #endif } set { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSETSTEPMUL, value); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } } public void FullGc() { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCCOLLECT, 0); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } public void StopGc() { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSTOP, 0); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } public void RestartGc() { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCRESTART, 0); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } public bool GcStep(int data) { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif return LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCSTEP, data) != 0; #if THREAD_SAFT || HOTFIX_ENABLE } #endif } public int Memroy { get { #if THREAD_SAFT || HOTFIX_ENABLE lock (luaEnvLock) { #endif return LuaAPI.lua_gc(L, LuaGCOptions.LUA_GCCOUNT, 0); #if THREAD_SAFT || HOTFIX_ENABLE } #endif } } } } LuaException: c# exception:System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. at System.Collections.Generic.Dictionary`2[System.String,FishPathData].get_Item (System.String key) [0x000a2] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:150 at FishPathManager.getPath (System.String name) [0x00021] in D:\Lua_Dating546\Assets\Scripts\Util\FishPathManager.cs:117 at fish.setPath (System.String pathName, Single lifeTime, Boolean freeGroup, Single roat, Single speed) [0x00000] in D:\Lua_Dating546\Assets\Scripts\Util\fish.cs:744 at CSObjectWrap.fishWrap.setPath (IntPtr L) [0x000a4] in D:\Lua_Dating546\Assets\XLua\Gen\fishWrap.cs:403 stack traceback: [C]: in method 'setPath' game.fish.gameobject.Fish:192: in function 'game.fish.gameobject.Fish.setPath' game.fish.gameobject.Fish:131: in function 'game.fish.gameobject.Fish.initInfo' game.fish.view.FishGameRoot:881: in function 'game.fish.view.FishGameRoot.createOneFish' game.fish.view.FishGameRoot:776: in function 'game.fish.view.FishGameRoot.Update' base.system.UpdateBeat:22: in function 'base.system.UpdateBeat.Update' base.Main:13: in function 'update' XLua.LuaEnv.ThrowExceptionFromError (Int32 oldTop) (at Assets/XLua/Src/LuaEnv.cs:367) XLua.DelegateBridge.SystemVoid () (at Assets/XLua/Gen/DelegatesGensBridge.cs:34) LuaFramework.LuaManager.Update () (at Assets/Scripts/Manager/LuaManager.cs:111)
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