Using GDB to find what memory address a function corresponds to/ debugging

Question

I have this basic program:

int initfunc(int *array, int len) {
  int i;
  for(i=1; i <= len; i++) {
    array[i] = i;
  }
 return 0;
}

int main(int argc, char* argv[]){

  int*  myarray=0;
  initfunc(myarray,10);
}

First i'm trying to figure out what the command in GDB to find what memory address main is stored in.

And also my error is at line 4 (array[i] = i), i'm trying to figure out what I need to do to get it to run. My professor wrote this program so I get that using these pointers probably isn't a good way to code this basic program. I just need some insight since i'm not too great with pointers.

Answer 1

before compile you must use -g for save symbol link to your execute file.

if you use gdb a.out you get error :

Reading symbols from TEMP...(no debugging symbols found)...done.

but if you use g++ -g test.cpp and now gdb show you :

Reading symbols from a.out...done.

And now you can use command-gdb

And see this : How to use GDB to find what function a memory address corresponds to

Answer 2

I figured it out, thanks for the insight. I just used breakpoints in GDB to figure out memory allocation for functions. I failed to mention I used -g in my makefile, so that part was already done. Also the memory allocation for the array wasn't present and that fixed the issue! Cheers