EM9360 wince5.0读文本文件的问题

在开发板wince5.0系统的NandFlash文件夹下建立datlib文件夹。在datlib文件夹下有yc.txt文本文件。用vs2005编程序读这个文本文件，编译通过，生成解决方案通过，部署解决方案通过。在启动调试时，卡在在了加载模块: coredll.dll，这里不动了。显示如下：

加载模块: tt1.exe

加载模块: ws2.dll

加载模块: coredll.dll

但是当文本文件中的字符小于20行("2 20"这一行)时，在启动调试，一切正常，可以运行。显示如下：

加载模块: tt1.exe

加载模块: ws2.dll

加载模块: coredll.dll

加载模块: ssllsp.dll

加载模块: wspm.dll

CDT Thread run success by gaoyang

MacuSend Thread run

MacuReceive Thread run

***************************************************

yc.txt文件内容如下：

"1 1"

"1 2"

"1 3"

"1 10"

"1 11"

"1 20"

"1 25"

"7 1"

"7 2"

"7 3"

"7 10"

"7 11"

"7 20"

"7 25"

"2 1"

"2 2"

"2 3"

"2 10"

"2 11"

"2 20"

"2 25"

"6 1"

"6 2"

"6 3"

"6 10"

"6 11"

"6 20"

"6 25"

程序代码如下：

// 读第一个CDT数据库点表遥测表

// strcpy(strtmp1,"/NandFlash/datlib/CDTA.yc");

strcpy(strtmp1,"/NandFlash/datlib/yc.txt");

if((fp = fopen(strtmp1, "r")) != NULL)

{

for (tmp = 0; tmp < 256; tmp++)

{

if (!(fgets(cdt_str[tmp], 31, fp)))

break;

cdt_count++;

}

yc_total = 0;

fclose(fp);

for(tmp = 0; tmp < cdt_count; tmp++)

{

tmp1 = sscanf(cdt_str[tmp], "\"%d %d\"",

&cdt_tx0.ycd[tmp].dyno, &cdt_tx0.ycd[tmp].lxno);

if(tmp1 == 0)

break;

cdt_tx0.ycd[tmp].dyno--;

yc_total++;

}

cdt_tx0.a_all_len = yc_total / 2 + yc_total % 2;

}

***************************************************************************

在出现问题时，设置断点，可以看到程序已经把第20行后的所有数据都读出来了。继续单步运行程序，最后会跳到secchk.c这个文件，程序运行箭头停在这个程序的最后一行不动了。

程序只涉及到串口和IO操作，编的是电力CDT规约，应该没有涉及到cookie的东西。

secchk.c的内容如下：

/***

*secchk.c - checks buffer overrun security cookie for x86

*Purpose:

* Defines compiler helper __security_check_cookie, used by the /GS

* compile switch to detect local buffer variable overrun bugs/attacks.

* When compiling /GS, the compiler injects code to detect when a local

* array variable has been overwritten, potentially overwriting the

* return address (on machines like x86 where the return address is on

* the stack). A local variable is allocated directly before the return

* address and initialized on entering the function. When exiting the

* function, the compiler inserts code to verify that the local variable

* has not been modified. If it has, then an error reporting routine

* is called.

*******************************************************************************/

#include <windows.h>

#include <process.h>

* The global security cookie. This name is known to the compiler.

extern UINT_PTR __security_cookie;

/***

*__security_check_cookie(cookie) - check for buffer overrun

*Purpose:

* Compiler helper. Check if a local copy of the security cookie still

* matches the global value. If not, then report the fatal error.

* The actual reporting is done by __report_gsfailure

* since the cookie check routine must be minimal code that preserves

* any registers used in returning the callee's result.

*Entry:

* UINT_PTR cookie - local security cookie to check

*Exit:

* Returns immediately if the local cookie matches the global version.

* Otherwise, calls the failure reporting handler and exits.

*Exceptions:

*******************************************************************************/

void __declspec(naked) __fastcall __security_check_cookie(UINT_PTR cookie)

{

/* x86 version written in asm to preserve all regs */

__asm {

cmp ecx, __security_cookie

jne failure

rep ret /* REP to avoid AMD branch prediction penalty */

failure:

jmp __report_gsfailure

}

找到原因了。

这个程序是在别的系统移植过来的，原先系统对点表做了20个的限制。所以出现了BUG。

bingdongcha	1楼信息 \| 搜索 \| 邮箱
加好友发短信	EM9360 wince5.0读文本文件的问题 Post By：2013-9-3 16:11:00 [显示全部帖子] 在开发板wince5.0系统的NandFlash文件夹下建立datlib文件夹。在datlib文件夹下有yc.txt文本文件。用vs2005编程序读这个文本文件，编译通过，生成解决方案通过，部署解决方案通过。在启动调试时，卡在在了加载模块: coredll.dll，这里不动了。显示如下：加载模块: tt1.exe 加载模块: ws2.dll 加载模块: coredll.dll 但是当文本文件中的字符小于20行("2 20"这一行)时，在启动调试，一切正常，可以运行。显示如下：加载模块: tt1.exe 加载模块: ws2.dll 加载模块: coredll.dll 加载模块: ssllsp.dll 加载模块: wspm.dll CDT Thread run success by gaoyang MacuSend Thread run MacuReceive Thread run ************************************************* *********************************************** yc.txt文件内容如下： "1 1" "1 2" "1 3" "1 10" "1 11" "1 20" "1 25" "7 1" "7 2" "7 3" "7 10" "7 11" "7 20" "7 25" "2 1" "2 2" "2 3" "2 10" "2 11" "2 20" "2 25" "6 1" "6 2" "6 3" "6 10" "6 11" "6 20" "6 25" 程序代码如下： // 读第一个CDT数据库点表遥测表 // strcpy(strtmp1,"/NandFlash/datlib/CDTA.yc"); strcpy(strtmp1,"/NandFlash/datlib/yc.txt"); if((fp = fopen(strtmp1, "r")) != NULL) { for (tmp = 0; tmp < 256; tmp++) { if (!(fgets(cdt_str[tmp], 31, fp))) break; cdt_count++; } yc_total = 0; fclose(fp); for(tmp = 0; tmp < cdt_count; tmp++) { tmp1 = sscanf(cdt_str[tmp], "\"%d %d\"", &cdt_tx0.ycd[tmp].dyno, &cdt_tx0.ycd[tmp].lxno); if(tmp1 == 0) break; cdt_tx0.ycd[tmp].dyno--; yc_total++; } cdt_tx0.a_all_len = yc_total / 2 + yc_total % 2; } ************************************************************************* 在出现问题时，设置断点，可以看到程序已经把第20行后的所有数据都读出来了。继续单步运行程序，最后会跳到secchk.c这个文件，程序运行箭头停在这个程序的最后一行不动了。程序只涉及到串口和IO操作，编的是电力CDT规约，应该没有涉及到cookie的东西。

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bingdongcha	2楼信息 \| 搜索 \| 邮箱
加好友发短信	Post By：2013-9-3 16:11:00 [显示全部帖子] secchk.c的内容如下： /*** secchk.c - checks buffer overrun security cookie for x86 * Copyright (c) Microsoft Corporation. All rights reserved. * Purpose: Defines compiler helper __security_check_cookie, used by the /GS * compile switch to detect local buffer variable overrun bugs/attacks. * * When compiling /GS, the compiler injects code to detect when a local * array variable has been overwritten, potentially overwriting the * return address (on machines like x86 where the return address is on * the stack). A local variable is allocated directly before the return * address and initialized on entering the function. When exiting the * function, the compiler inserts code to verify that the local variable * has not been modified. If it has, then an error reporting routine * is called. * ******************************************************************************/ #include <windows.h> #include <process.h> / * The global security cookie. This name is known to the compiler. / extern UINT_PTR __security_cookie; /** __security_check_cookie(cookie) - check for buffer overrun Purpose: Compiler helper. Check if a local copy of the security cookie still * matches the global value. If not, then report the fatal error. * * The actual reporting is done by __report_gsfailure * since the cookie check routine must be minimal code that preserves * any registers used in returning the callee's result. * Entry: UINT_PTR cookie - local security cookie to check * Exit: Returns immediately if the local cookie matches the global version. * Otherwise, calls the failure reporting handler and exits. * Exceptions: ******************************************************************************/ void __declspec(naked) __fastcall __security_check_cookie(UINT_PTR cookie) { / x86 version written in asm to preserve all regs / __asm { cmp ecx, __security_cookie jne failure rep ret / REP to avoid AMD branch prediction penalty */ failure: jmp __report_gsfailure } }

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bingdongcha	3楼信息 \| 搜索 \| 邮箱
加好友发短信	Post By：2013-9-4 13:30:00 [显示全部帖子] 找到原因了。这个程序是在别的系统移植过来的，原先系统对点表做了20个的限制。所以出现了BUG。

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