Run set print elements 0.

• When the last number is a positive integer, it denotes the number of elements in an array (in this case, a char array since our target is a string) that should be printed without truncation.
• 0 represents no limit; every element will be printed out.

References:

• https://stackoverflow.com/questions/233328/how-do-i-print-the-full-value-of-a-long-string-in-gdb