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Access Violation

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oib111
I post too much

Reputation: 0

Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?

Posted: Fri Mar 13, 2009 8:16 pm Post subject: Access Violation

I'm trying to compile some code to parse through some command line arguments and I keep getting an access violation. My code is:

Code:

Commands = (char*)HeapAlloc(GetProcessHeap(), 0, sizeof(CHAR)*(strlen(lpCmdLine)+1));
if(Commands != NULL) {
   strcpy(Commands, lpCmdLine);
}
char *c = new char[1]; //the new char[1] fixed a previous error
int i = 0;
int j = 0;
do {
   c[1] = Commands[i]; //access violation on this line
   Open[j] = c[1];
   i++;
   j++;
} while(strcmp(c, " ") != 0);
do {
   c[1] = Commands[i];
   RecvUserName[j] = c[1];
   i++;
   j++;
} while(strcmp(c, " ") != 0);
i += 1;
j = 0;
do {
   c[1] = Commands[i];
   RecvFileName[j] = c[1];
   i++;
   j++;
} while(strcmp(c, '\0') != 0);
delete [] c;

The access violation is:

Quote:

'IBIM Transfer.exe': Loaded 'C:\Documents and Settings\OIB\My Documents\Visual Studio 2008\Projects\IBIM Transfer\Debug\IBIM Transfer.exe', Symbols loaded.
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\ntdll.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\kernel32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\user32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\gdi32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\comdlg32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\advapi32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\rpcrt4.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\secur32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83\comctl32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\msvcrt.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\shlwapi.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\shell32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\ws2_32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\ws2help.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\shimeng.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\imm32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\wbsys.dll'
First-chance exception at 0x7c91b1fa in IBIM Transfer.exe: 0xC0000005: Access violation writing location 0x00000010.
'IBIM Transfer.exe': Unloaded 'C:\WINDOWS\system32\wbsys.dll'
'IBIM Transfer.exe': Unloaded 'C:\WINDOWS\system32\shimeng.dll'
First-chance exception at 0x00416cb2 in IBIM Transfer.exe: 0xC0000005: Access violation reading location 0x000000b2.
Unhandled exception at 0x00416cb2 in IBIM Transfer.exe: 0xC0000005: Access violation reading location 0x000000b2.

_________________

8D wrote:

cigs dont make people high, which weed does, which causes them to do bad stuff. like killing

Zand
Master Cheater

Reputation: 0

Joined: 21 Jul 2006
Posts: 424

Posted: Fri Mar 13, 2009 9:09 pm Post subject:

Code:

c[1]

Probably that.

oib111
I post too much

Reputation: 0

Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?

Posted: Fri Mar 13, 2009 10:07 pm Post subject:

Changed to c[0] and I'm still getting access violations.
_________________

8D wrote:

cigs dont make people high, which weed does, which causes them to do bad stuff. like killing

Zand
Master Cheater

Reputation: 0

Joined: 21 Jul 2006
Posts: 424

Posted: Sat Mar 14, 2009 12:02 am Post subject:

Post your full code + maybe think about using tokens.

Noz3001
I'm a spammer

Reputation: 26

Joined: 29 May 2006
Posts: 6220
Location: /dev/null

Posted: Sat Mar 14, 2009 3:07 am Post subject:

Code:

char *c = new char[128];

oib111
I post too much

Reputation: 0

Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?

Posted: Sat Mar 14, 2009 10:31 am Post subject:

Sorry noz that didn't help.
_________________

8D wrote:

cigs dont make people high, which weed does, which causes them to do bad stuff. like killing

Zand
Master Cheater

Reputation: 0

Joined: 21 Jul 2006
Posts: 424

Posted: Sat Mar 14, 2009 10:49 am Post subject:

Code:

Commands = (char*)HeapAlloc(GetProcessHeap(), 0, strlen(lpCmdLine)+1);
if(Commands) {
strcpy(Commands, lpCmdLine);

int i = 0;
int j = 0;

for( ; ! isspace( Commands[i] ); i++, j++ )
{
Open[j] = Commands[i];
}

for( ; ! isspace( Commands[i] ); i++, j++ )
{
RecvUserName[j] = Commands[i]; // I R DINK PROBLEMZ HERE
}

for( i += 1, j = 0; Commands[i] != '\0'; i++, j++ )
{
RecvFileName[j] = Commands[i]; I R DINK PROBLEMZ HERE
}

}

oib111
I post too much

Reputation: 0

Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?

Posted: Sat Mar 14, 2009 11:29 am Post subject:

Zand with your code I still get an access violation. Except its on the line:

Code:

for(;!isspace(Commands[i]); i++, j++ )

Access violation:

Quote:

'IBIM Transfer.exe': Loaded 'C:\Documents and Settings\OIB\My Documents\Visual Studio 2008\Projects\IBIM Transfer\Debug\IBIM Transfer.exe', Symbols loaded.
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\ntdll.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\kernel32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\user32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\gdi32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\comdlg32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\advapi32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\rpcrt4.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\secur32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83\comctl32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\msvcrt.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\shlwapi.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\shell32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\ws2_32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\ws2help.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\shimeng.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\imm32.dll'
'IBIM Transfer.exe': Loaded 'C:\WINDOWS\system32\wbsys.dll', Binary was not built with debug information.
First-chance exception at 0x7c91b1fa in IBIM Transfer.exe: 0xC0000005: Access violation writing location 0x00000010.
'IBIM Transfer.exe': Unloaded 'C:\WINDOWS\system32\wbsys.dll'
'IBIM Transfer.exe': Unloaded 'C:\WINDOWS\system32\shimeng.dll'
First-chance exception at 0x00416caa in IBIM Transfer.exe: 0xC0000005: Access violation reading location 0x000000b2.
Unhandled exception at 0x00416caa in IBIM Transfer.exe: 0xC0000005: Access violation reading location 0x000000b2.

_________________

8D wrote:

cigs dont make people high, which weed does, which causes them to do bad stuff. like killing

Flyte
Peanuts!!!!

Reputation: 6

Joined: 19 Apr 2006
Posts: 1887
Location: Canada

Posted: Sat Mar 14, 2009 12:18 pm Post subject:

For the love of god, tokenize the string first using strtok() or something.

oib111
I post too much

Reputation: 0

Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?

Posted: Sat Mar 14, 2009 1:38 pm Post subject:

Thanks Flyte. strtok worked.
_________________

8D wrote:

cigs dont make people high, which weed does, which causes them to do bad stuff. like killing

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