If you omit expr, GDB displays the last value again (from the value history; see Value History). This allows you to conveniently inspect the same value in an alternative format. If the architecture …

If you omit expr, GDB displays the last value again (from the value history; see section Value history). This allows you to conveniently inspect the same value in an alternative format. A more low-level way …

new conditional expression on breakpoint n; make unconditional if no expr temporary break; disable when reached break on all functions matching regex set a watchpoint for expression expr break at …

print expr, print /f expr expr is an expression (in the source language). By default the value of expr is printed in a format appropriate to its data type; you can choose a different format by specifying /f, …

If you omit expr, GDB displays the last value again (from the value history; see section Value history). This allows you to conveniently inspect the same value in an alternative format. A more low-level way …

GDB Cheat Sheet ... Examining the Stack backtrace display the current call stack (can be used after a runtime error, eg. segfault) Gabrielle Singh Cadieux, 2017

addr, starting display address addr is the address where you want GDB to begin displaying memory. The expression need not have a pointer value (though it may); it is always interpreted as an integer …

This page explains the display command. The display command enables automatic displaying of certain expressions each time GDB stops at a breakpoint or after a step.