Problem with debbuging under windows 7

[wyder]

I have removed includes not connected with Qt (windows.h, map, vector ),
i use only includes started with Q. I use QFile instead of CreateFile etc...

When i enter the code below, and make breakpoint on some line, when it break,
then I hit F10 and program suspends... 100% CPU, +500MB memory used and
growing...

And don't know what is wrong.
Before mentioned function i open the file, allocate 8MB memory on heap for
file data, and close the file ...

any suggestions ?

bool LogFileAnalizer::BuildTransactionVector( QString& error )
{
    // clear previous data
    _transactions.clear();
 
    // constants used
    const Char BeginMark = _pVersion->GetBeginMark();
    const Char EmptyMark = _pVersion->GetEmptyMark();
    const Char EmptyMemoryId = _pVersion->GetUnusedMemTransactionId();
    const Char WrongMemoryId = _pVersion->GetWrongMemoryTransactionId();
    const Char RootBeginId = 0x35; //!! hardcoded, change later
    const Char RootEndId   = 0x38; //!! hardcoded, change later
    const Char RootContId  = 0x39; //!! hardcoded, change later -> works like RootEndId
    const Int MinEmptyDataSize = 128;   // minimum continous empty mark size to treat it as empty space (not trans param) !! hardcoded - change later
 
    // data pointers
    Char* fileBegin = _data;            // file begin
    Char* fileEnd = _data + _fileSize;  // file end
    Char* dataBegin = 0;                      // transactions data begin - to find
    Char* dataEnd = 0;                        // transactions data end - to find
 
    // cursors
    Char* pos = _data;              // position to go through buffer
    Char* end = _data + _fileSize;  // buffer end postion
 
    // FIND EMPTY BUFFER END TRANSACTION ENTRY BEGIN AND END
    // go to first transaction 
    while(( *pos != BeginMark && pos < end ) || (( pos + 1 ) < end && *pos == BeginMark && *( ++pos ) == BeginMark )) // second condition skips double BeginMark which means a normal data
    {
        ++pos;
    }
 ....

bool LogFileAnalizer::BuildTransactionVector( QString& error )
{
    // clear previous data
    _transactions.clear();

    // constants used
    const Char BeginMark = _pVersion->GetBeginMark();
    const Char EmptyMark = _pVersion->GetEmptyMark();
    const Char EmptyMemoryId = _pVersion->GetUnusedMemTransactionId();
    const Char WrongMemoryId = _pVersion->GetWrongMemoryTransactionId();
    const Char RootBeginId = 0x35; //!! hardcoded, change later
    const Char RootEndId   = 0x38; //!! hardcoded, change later
    const Char RootContId  = 0x39; //!! hardcoded, change later -> works like RootEndId
    const Int MinEmptyDataSize = 128;   // minimum continous empty mark size to treat it as empty space (not trans param) !! hardcoded - change later

    // data pointers
    Char* fileBegin = _data;            // file begin
    Char* fileEnd = _data + _fileSize;  // file end
    Char* dataBegin = 0;                      // transactions data begin - to find
    Char* dataEnd = 0;                        // transactions data end - to find

    // cursors
    Char* pos = _data;              // position to go through buffer
    Char* end = _data + _fileSize;  // buffer end postion

    // FIND EMPTY BUFFER END TRANSACTION ENTRY BEGIN AND END
    // go to first transaction 
    while(( *pos != BeginMark && pos < end ) || (( pos + 1 ) < end && *pos == BeginMark && *( ++pos ) == BeginMark )) // second condition skips double BeginMark which means a normal data
    {
        ++pos;
    }
 ....

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