Byte pointer buffer becomes a bad pointer after a certain buffer location - memory corruption

Question

I have a byte pointer variable, in which I am adding buffer location by adding a unsigned integer value.

For example:

for (int i=0; i<22, i++)

{

//currentOffset = 50000 or may vary every time when it enters the loop

obj->byteVar = initailByte + totalOffset + currentOffset

totalOffset += currentOffset;

}

This I am adding in a for loop to increase the buffer location. At a certain point the byte pointer obj->byteVar becomes a bad pointer. What I am doing wrong here and how to store as much as buffer.

Note: InitialByte - a byte variable  (initiallised to zero always), totalOffset - an unsigned integer, currentOffset - an unsigned integer,

Your suggestions will be real helpful. Thanks in advance.

---

pramod kumar bugudai

Answer 1

Hi pram,

>>"At a certain point the byte pointer obj->byteVar becomes a bad pointer. "

Bad pointer means the pointer point to a unsigned space.

>>"how to store as much as buffer."

I suggest you use a array to store a list of buffer and use ++ or -- for a add or remove a offset of a point. Code below is for your reference.

uint myArray[5] = { 1000, 2, 3, 17, 50 };
obj->byteVar = myArray;
for (int i = 0; i < myArray.Length - 1; i++)
{
    obj->byteVar++;
}

Best Regards,
Li Wang

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Answer 2

Hello,

 I want to know exactly the purpose of your project.  I dont know about anyone else but this snippet

seems incorrect way to adjust memory allocation, escpecially in C++.  Managed is more secure

when memory allocation/resize/de-allocations are required.  I find the code snippet to be suspsect.

Please explain further with more details about your project and information about the versions of OS,

Visual Studio, 3rd Party libraries, etc.

 Thanks :)