17.2.27 Stack_protector Function Attribute

The stack_protector attribute adds stack protection code to the function if one of the following options is set: -fstack-protector, -fstack-protector-strong, or -fstack-protector-explicit. For example:

void __attribute__ ((stack_protector)) foo(void);

Optimizations can affect stack protection in the following ways:

• Function inlining can affect whether a function is protected.
• Removal of an unused variable can prevent a function from being protected.