移动平台下lua调试方法

最新推荐文章于 2025-12-07 09:07:13 发布

最新推荐文章于 2025-12-07 09:07:13 发布 · 121 阅读

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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="ProgId" content="Word.Document"> <meta name="Generator" content="Microsoft Word 12"> <meta name="Originator" content="Microsoft Word 12"> <link rel="File-List" href="file:///C:%5CDOCUME%7E1%5CADMINI%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_filelist.xml"> <link rel="themeData" href="file:///C:%5CDOCUME%7E1%5CADMINI%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_themedata.thmx"> <link rel="colorSchemeMapping" href="file:///C:%5CDOCUME%7E1%5CADMINI%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_colorschememapping.xml"> <smallfrac m:val="off"><dispdef><lmargin m:val="0"><rmargin m:val="0"><defjc m:val="centerGroup"><wrapindent m:val="1440"><intlim m:val="subSup"><narylim m:val="undOvr"></narylim></intlim></wrapindent><style>  </style> <p class="MsoNormal" style="text-indent: 21pt;"><span style="font-family: 宋体;">听说</span><span lang="EN-US">vs</span><span style="font-family: 宋体;">有一个插件叫做</span><span lang="EN-US">vslua</span><span style="font-family: 宋体;">，可以在</span><span lang="EN-US">vs</span><span style="font-family: 宋体;">里单步</span><span lang="EN-US">lua</span><span style="font-family: 宋体;">程序，但是听试过的人说，只能对纯脚本。如果脚本里调用一个</span><span lang="EN-US">C</span><span style="font-family: 宋体;">函数，是无法从脚本代码单步到</span><span lang="EN-US">C</span><span style="font-family: 宋体;">语言代码，也无法从</span><span lang="EN-US">C</span><span style="font-family: 宋体;">语言代码单步到脚本代码。对于在</span><span lang="EN-US">MTK</span><span style="font-family: 宋体;">里构建一个</span><span lang="EN-US">lua</span><span style="font-family: 宋体;">虚拟器这种情况，也是无法单步脚本程序的。</span></p> <p class="MsoNormal" style="text-indent: 21pt;"><span style="font-family: 宋体;">在</span><span lang="EN-US">MTK</span><span style="font-family: 宋体;">平台下使用</span><span lang="EN-US">LUA</span><span style="font-family: 宋体;">脚本语言的调试过程是很困难的，原因是</span><span lang="EN-US">lua</span><span style="font-family: 宋体;">脚本并没有真正意义上的编译（也即没有语法检查），也没有单步调试。以下是我这几个月的总结：</span></p> <p class="MsoNormal" style="text-indent: 21pt;"><span lang="EN-US"><p></p></span></p> <p class="MsoNormal" style="text-indent: 21pt;"><span style="font-family: 宋体;">注意要点：</span></p> <p class="MsoNormal" style="text-indent: 21pt;"><span lang="EN-US">1</span><span style="font-family: 宋体;">．细心。</span><span lang="EN-US">Lua</span><span style="font-family: 宋体;">不会帮你检查你的函数名（变量名）是否写错了。</span></p> <p class="MsoNormal" style="text-indent: 21pt;"><span lang="EN-US">2</span><span style="font-family: 宋体;">．好的设计。每一种语言都要设计，但在这种调试困难的环境下，设计显得更加重要。设计不好，后面改起来更困难。</span></p> <p class="MsoNormal"><span lang="EN-US"><span style=""> </span></span></p> <p class="MsoNormal"><span lang="EN-US"><span style=""> </span></span><span style="font-family: 宋体;">如果</span><span lang="EN-US">lua</span><span style="font-family: 宋体;">程序运行出错了，调试办法如下：</span></p> <p class="MsoNormal"><span lang="EN-US"><span style=""> </span>1</span><span style="font-family: 宋体;">。代码里打</span><span lang="EN-US">log(</span><span style="font-family: 宋体;">也就是写到文件</span><span lang="EN-US">)</span><span style="font-family: 宋体;">，根据</span><span lang="EN-US">log</span><span style="font-family: 宋体;">的内容判断程序出错的地方。</span></p> <p class="MsoNormal"><span lang="EN-US"><p></p></span></p> <p class="MsoNormal"><span lang="EN-US"><span style=""> </span>2</span><span style="font-family: 宋体;">。根据出错的现象来判断出错时调用了哪个函数，直接在函数里设置断点。例如</span><span lang="EN-US">:lua</span><span style="font-family: 宋体;">程序无法将文字显示在手机屏幕上，那么直接把断点打在</span><span lang="EN-US">gui_print_text_n</span><span style="font-family: 宋体;">语句上，看看</span><span lang="EN-US">x</span><span style="font-family: 宋体;">，</span><span lang="EN-US">y</span><span style="font-family: 宋体;">还有</span><span lang="EN-US">str</span><span style="font-family: 宋体;">有没有错。</span></p> <p class="MsoNormal"><span lang="EN-US"><p></p> <div class="highlighter"><ol class="highlighter-cpp" start="1"> <li> <span class="datatypes">int</span><span>drawString(lua_State*L)</span> </li> <li class="alt"><span>{</span></li> <li><span>。。。</span></li> <li class="alt"> <span>unsigned</span><span class="datatypes">short</span><span>*str=(unsigned</span><span class="datatypes">short</span><span>*)(unsigned</span><span class="datatypes">long</span><span>)lua_tonumber(L，2);</span> </li> <li> <span></span><span class="datatypes">int</span><span>x=(</span><span class="datatypes">int</span><span>)lua_tonumber(L，3);</span> </li> <li class="alt"> <span></span><span class="datatypes">int</span><span>y=(</span><span class="datatypes">int</span><span>)lua_tonumber(L，4);</span> </li> <li><span></span></li> <li class="alt"><span>gui_set_text_color(。。。);</span></li> <li><span>gui_move_text_cursor(x，y);</span></li> <li class="alt"><span>gui_print_text_n(str，len);</span></li> <li><span></span></li> <li class="alt"> <span></span><span class="keyword">return</span><span>0;</span> </li> <li><span>}</span></li> </ol></div></span></p> <p class="MsoNormal"><span lang="EN-US"><p></p></span></p> <p class="MsoNormal"><span lang="EN-US"><span style=""> </span>3</span><span style="font-family: 宋体;">。</span><span lang="EN-US">lua_pcall</span><span style="font-family: 宋体;">返回非</span><span lang="EN-US">0</span><span style="font-family: 宋体;">时获取出错信息。测试</span><span lang="EN-US">C</span><span style="font-family: 宋体;">代码如下：</span></p> <p class="MsoNormal"><span lang="EN-US"><p></p> <div class="highlighter"><ol class="highlighter-cpp" start="1"> <li><span></span></li> <li class="alt"> <span></span><span class="preprocessor">#ifndefARRAY_LEN</span><span></span> </li> <li> <span></span><span class="preprocessor">#defineARRAY_LEN(array)(sizeof(array)/sizeof(array[0]))</span><span></span> </li> <li class="alt"> <span></span><span class="preprocessor">#endif</span><span></span> </li> <li> <span></span><span class="datatypes">int</span><span>test1(lua_State*l)</span> </li> <li class="alt"><span>{</span></li> <li> <span></span><span class="keyword">return</span><span>0;</span> </li> <li class="alt"><span>}</span></li> <li> <span></span><span class="datatypes">int</span><span>test2(lua_State*l)</span> </li> <li class="alt"><span>{</span></li> <li> <span></span><span class="keyword">return</span><span>0;</span> </li> <li class="alt"><span>}</span></li> <li> <span></span><span class="keyword">static</span><span></span><span class="keyword">const</span><span>luaL_regmyLib[]=</span> </li> <li class="alt"><span>{</span></li> <li> <span>{</span><span class="string">"test1"</span><span>,test1},</span> </li> <li class="alt"> <span>{</span><span class="string">"test2"</span><span>,test2},</span> </li> <li><span>};</span></li> <li class="alt"> <span></span><span class="keyword">void</span><span>my_openlibs(lua_State*l)</span> </li> <li><span>{</span></li> <li class="alt"> <span></span><span class="datatypes">int</span><span>i=0;</span> </li> <li><span></span></li> <li class="alt"> <span></span><span class="keyword">for</span><span>(i=0;i<ARRAY_LEN(myLib);i++)</span> </li> <li><span>{</span></li> <li class="alt"><span>lua_register(l,myLib[i].name,myLib[i].func);</span></li> <li><span>}</span></li> <li class="alt"><span>}</span></li> <li><span></span></li> <li class="alt"> <span></span><span class="datatypes">int</span><span>main(</span><span class="datatypes">int</span><span>argc,</span><span class="datatypes">char</span><span>*argv[]){</span> </li> <li> <span></span><span class="datatypes">int</span><span>status;</span> </li> <li class="alt"> <span></span><span class="keyword">struct</span><span>Smains;</span> </li> <li> <span></span><span class="datatypes">int</span><span>ret;</span> </li> <li class="alt"> <span>lua_State*l=lua_open();</span><span class="comment">/*createstate*/</span><span></span> </li> <li> <span></span><span class="keyword">if</span><span>(l==NULL){</span> </li> <li class="alt"> <span>l_message(argv[0],</span><span class="string">"cannotcreatestate:notenoughmemory"</span><span>);</span> </li> <li> <span></span><span class="keyword">return</span><span>EXIT_FAILURE;</span> </li> <li class="alt"><span>}</span></li> <li> <span></span><span class="comment">//luaL_openlibs(l);</span><span></span> </li> <li class="alt"><span>my_openlibs(l);</span></li> <li><span></span></li> <li class="alt"> <span>luaL_loadfile(l,</span><span class="string">"test.lua"</span><span>);</span> </li> <li> <span></span><span class="keyword">if</span><span>(lua_pcall(l,0,-1,0)!=0)</span> </li> <li class="alt"><span>{</span></li> <li> <span></span><span class="keyword">const</span><span></span><span class="datatypes">char</span><span>*str;</span> </li> <li class="alt"><span>lua_pop(l,1);</span></li> <li><span>str=lua_tostring(l,0);</span></li> <li class="alt"><span>status=status;</span></li> <li><span>}</span></li> <li class="alt"> <span>lua_getglobal(l,</span><span class="string">"main"</span><span>);</span> </li> <li> <span></span><span class="comment">//lua_pushnumber(L,param1);</span><span></span> </li> <li class="alt"> <span></span><span class="comment">//lua_pushnumber(L,param2);</span><span></span> </li> <li> <span></span><span class="keyword">if</span><span>(lua_pcall(l,0,1,0)!=0)</span> </li> <li class="alt"><span>{</span></li> <li> <span></span><span class="keyword">const</span><span></span><span class="datatypes">char</span><span>*str;</span> </li> <li class="alt"><span>lua_pop(l,1);</span></li> <li><span>str=lua_tostring(l,0);</span></li> <li class="alt"><span>status=status;</span></li> <li><span>}</span></li> <li class="alt"> <span></span><span class="keyword">return</span><span>1;</span> </li> <li><span>}</span></li> <li class="alt"><span></span></li> </ol></div></span></p> <p class="MsoNormal"><span style="font-family: 宋体;">脚本代码如下：</span></p> <p class="MsoNormal"><span lang="EN-US"><p></p> <div class="highlighter"><ol class="highlighter-py" start="1"> <li><span>functionmain()</span></li> <li class="alt"><span>test1()</span></li> <li><span>test2()</span></li> <li class="alt"><span>test3()</span></li> <li> <span></span><span class="keyword">return</span><span></span><span class="number">1</span><span></span> </li> <li class="alt"><span>end</span></li> </ol></div></span></p> <p class="MsoNormal"><span style="font-family: 宋体;">将断点设置在这一句：</span></p> <p class="MsoNormal"><span lang="EN-US"><span style=""> </span>status = status;</span></p> <p class="MsoNormal" style="text-indent: 21pt;"><span style="font-family: 宋体;">如果</span><span lang="EN-US">lua</span><span style="font-family: 宋体;">正确运行，则不会跳到这个断点上；在某些情况下运行出错，就会到这里到。那么查看</span><span lang="EN-US">str</span><span style="font-family: 宋体;">的内容就知道出错信息。</span></p> <p class="MsoNormal" style="text-indent: 21pt;"><span style="font-family: 宋体;">在上面例子有两个</span><span lang="EN-US">lua_pcall</span><span style="font-family: 宋体;">，第一个读取文件内容，第二个执行</span><span lang="EN-US">lua</span><span style="font-family: 宋体;">脚本的</span><span lang="EN-US">main</span><span style="font-family: 宋体;">函数。如果运行“正常”的话，程序会停在第二个“</span><span lang="EN-US">status = status;</span><span style="font-family: 宋体;">”上。查看</span><span lang="EN-US">str</span><span style="font-family: 宋体;">内容，应该是这样的：</span></p> <p class="MsoNormal" style="margin-left: 21pt; text-indent: 21pt;"><span lang="EN-US">test.lua:7: attempt to call global `test3' (a nil value).</span></p> <p class="MsoNormal"><span lang="EN-US"><span style=""> </span></span><span style="font-family: 宋体;">实际上</span><span lang="EN-US">test3</span><span style="font-family: 宋体;">并没有定义，因此脚本就会报错。</span></p></defjc></rmargin></lmargin></dispdef></smallfrac>

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