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cdebugginggdbbreakpoints

GDB breakpoint doesn't stop

My goal is to figure out the address space of str_main, but gdb skips over my breakpoint.

How do I find its address location?

I have a simple c program, stack.c:

....
19 int main(int argc, char **argv[])
20 {
21    char str_main[517];
22    FILE *badfile;
23 
24    badfile = fopen("badfile","r");
....

When I enter gdb I set a breakpoint at line 21. However, when I run the debugger, I get the following message:

Breakpoint 1, main(argc=1, argv=0xbffff3d4) at stack.c:24
24            badfile = fopen("badfile","r");
Solution

  • GDB wont stop on declarations without default value.

    Even after reaching 24, you can still print the address.

    p /s str_main