36.3 Non-local Goto Probes

These probes are used to signal calls to setjmp, sigsetjmp, longjmp or siglongjmp.

Probe: setjmp (void *$arg1, int $arg2, void *$arg3)

This probe is triggered whenever setjmp or sigsetjmp is called. Argument $arg1 is a pointer to the jmp_buf passed as the first argument of setjmp or sigsetjmp, $arg2 is the second argument of sigsetjmp or zero if this is a call to setjmp and $arg3 is a pointer to the return address that will be stored in the jmp_buf.

Probe: longjmp (void *$arg1, int $arg2, void *$arg3)

This probe is triggered whenever longjmp or siglongjmp is called. Argument $arg1 is a pointer to the jmp_buf passed as the first argument of longjmp or siglongjmp, $arg2 is the return value passed as the second argument of longjmp or siglongjmp and $arg3 is a pointer to the return address longjmp or siglongjmp will return to.

The longjmp probe is triggered at a point where the registers have not yet been restored to the values in the jmp_buf and unwinding will show a call stack including the caller of longjmp or siglongjmp.

Probe: longjmp_target (void *$arg1, int $arg2, void *$arg3)

This probe is triggered under the same conditions and with the same arguments as the longjmp probe.

The longjmp_target probe is triggered at a point where the registers have been restored to the values in the jmp_buf and unwinding will show a call stack including the caller of setjmp or sigsetjmp.