Bug path

test ‘test’: events 1-2 28 void test (void) ^~~~ | (1) entry to ‘test’ 29 { 30 register_handler (); ~~~~~~~~~~~~~~~~~~~ | (2) calling ‘register_handler’ from ‘test’ register_handler ‘register_handler’: events 3-4 23 static void register_handler () ^~~~~~~~~~~~~~~~ | (3) entry to ‘register_handler’ 24 { 25 signal(SIGINT, int_handler); ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | (4) registering ‘int_handler’ as signal handler

event 5 (5): later on, when the signal is delivered to the process

int_handler ‘int_handler’: events 6-7 18 static void int_handler(int signum) ^~~~~~~~~~~ | (6) entry to ‘int_handler’ 19 { 20 custom_logger("got signal"); ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | (7) calling ‘custom_logger’ from ‘int_handler’ custom_logger ‘custom_logger’: events 8-9 13 void custom_logger(const char *msg) ^~~~~~~~~~~~~ | (8) entry to ‘custom_logger’ 14 { 15 fprintf(stderr, "LOG: %s", msg); /* { dg-warning "call to 'fprintf' from within signal handler" } */ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | (9) call to ‘fprintf’ from within signal handler