CODEWITHSUNDEEP
c++carrayssegmentation-faultindexoutofboundsexception
NaSh
NaSh

Reputation: 665

How to find "index out of bound" if I don't get Segmentation Fault

I have a program which cause Seg fault in a machine, which is not accessible for me. However, when I compile and run it with the same compiler and same input on my machine, I don't get anything. The problem is probably "array index out of bound" which might lead to Seg Fault in some circumstances, however, compiler does not show any warning. The program is huge and complicated. So I cannot find the problem just by checking the code.

Any suggestion on how to get the Segmentation Fault on my machine too? This way I can debug the code and find the problem.

Upvotes: 2

Views: 860

Answers (2)

Luis González
Luis González

Reputation: 134

You could use valgrind if it works over Linux machine. To use valgrind you just type on console:

valgrind --leak-check=full --num-callers=20 --tool=memcheck ./program

and should return invalid read/write of size X according to the variable and (if you compiled with debugging information), it will tell you the line where the problem might be.

By the way, you can install valgrind in Ubuntu/Debian Linux (for example) just as easy as:

sudo apt-get install valgrind

Upvotes: 6

BeeOnRope
BeeOnRope

Reputation: 64997

You can try a solution such as Valgrind as other posters mentioned, or your compiler may also have some specific ability to insert guard words before I located a raise to detect this kind of access.

Upvotes: 0

Related Questions