Symbian开发bug体验录(不定期更新)

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Symbian 开发 bug 体验录

创建日期： 2010-5-5           

创建者：   HuangDingwu

目的 :        记录平时遇到的一些奇怪 bug, 以便以后查询

 

修改次数： 2

一个 Carbide 编译器的 bug

       TBuf<50> buf;

       RDebug::Printf((const char*)buf);

 

这两句代码会导致 2.3 版 carbide 编译不过。

 

一个报 User 42 的 bug

HBufC* pBuf = HBufC::NewLC(10);

DEL (pBuf);

 

等程序最后退出时才报错，这是一个疏忽 ( 当然现实中这两句代码相隔是较远的 )  J

 

使用 C 函数库内存泄漏问题

pFile = fopen(xxx);

fclose(pFile);

出现漏水，需要使用 :

<libc/reent.h>

CloseSTDLIB();

 

 

如何控制程序只有一个实例

    程序入口加入以下代码：

    // 控制进程只有一个实例

    const TUid KProUid = {0x2002935D}; // 必须是本进程 uid

    TUint uSubId = 127;

    TInt ret = RProperty :: Define (KProUid, uSubId,

                     RProperty :: EInt );

             

    if (ret == KErrAlreadyExists)

    {

       // 如果已经存在，　退出

       return 0;

    }

 

程序退出时进行清理：

RProperty::Delete(KProUid,uSubId);

 

 

5320 联系人头像字段问题

它的 id 与 sdk 定义的不同，需要特殊处理,否则无法正确处理其头像

const TUid KUidContactFieldPicture_5320 = {0x10005dcc};