58 static void child_start(struct child_data *child, const char *program)  in child_start()  argument
68 	child->pid = fork();  in child_start()
69 	if (child->pid == -1)  in child_start()
73 	if (!child->pid) {  in child_start()
102 		child->stdout = pipefd[0];  in child_start()
103 		child->output = NULL;  in child_start()
104 		child->exited = false;  in child_start()
105 		child->output_seen = false;  in child_start()
108 		ev.data.ptr = child;  in child_start()
110 		ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, child->stdout, &ev);  in child_start()
113 					   child->name, strerror(errno), errno);  in child_start()
124 static bool child_output_read(struct child_data *child)  in child_output_read()  argument
130 	ret = read(child->stdout, read_data, sizeof(read_data));  in child_output_read()
136 			       child->name, strerror(errno),  in child_output_read()
142 	child->output_seen = true;  in child_output_read()
145 	if (child->output) {  in child_output_read()
146 		strncpy(work, child->output, sizeof(work) - 1);  in child_output_read()
148 		free(child->output);  in child_output_read()
149 		child->output = NULL;  in child_output_read()
160 			ksft_print_msg("%s: %s\n", child->name, work);  in child_output_read()
169 		ret = asprintf(&child->output, "%s", work);  in child_output_read()
177 static void child_output(struct child_data *child, uint32_t events,  in child_output()  argument
184 			read_more = child_output_read(child);  in child_output()
189 		close(child->stdout);  in child_output()
190 		child->stdout = -1;  in child_output()
194 	if (flush && child->output) {  in child_output()
195 		ksft_print_msg("%s: %s<EOF>\n", child->name, child->output);  in child_output()
196 		free(child->output);  in child_output()
197 		child->output = NULL;  in child_output()
201 static void child_tickle(struct child_data *child)  in child_tickle()  argument
203 	if (child->output_seen && !child->exited)  in child_tickle()
204 		kill(child->pid, SIGUSR2);  in child_tickle()
207 static void child_stop(struct child_data *child)  in child_stop()  argument
209 	if (!child->exited)  in child_stop()
210 		kill(child->pid, SIGTERM);  in child_stop()
213 static void child_cleanup(struct child_data *child)  in child_cleanup()  argument
219 	if (!child->exited) {  in child_cleanup()
221 			ret = waitpid(child->pid, &status, 0);  in child_cleanup()
227 					       child->pid, strerror(errno),  in child_cleanup()
233 		child->exit_status = WEXITSTATUS(status);  in child_cleanup()
236 	if (!child->output_seen) {  in child_cleanup()
237 		ksft_print_msg("%s no output seen\n", child->name);  in child_cleanup()
241 	if (child->exit_status != 0) {  in child_cleanup()
243 			       child->name, child->exit_status);  in child_cleanup()
247 	ksft_test_result(!fail, "%s\n", child->name);  in child_cleanup()
289 static void start_fpsimd(struct child_data *child, int cpu, int copy)  in start_fpsimd()  argument
293 	child_start(child, "./fpsimd-test");  in start_fpsimd()
295 	ret = asprintf(&child->name, "FPSIMD-%d-%d", cpu, copy);  in start_fpsimd()
299 	ksft_print_msg("Started %s\n", child->name);  in start_fpsimd()
302 static void start_sve(struct child_data *child, int vl, int cpu)  in start_sve()  argument
310 	child_start(child, "./sve-test");  in start_sve()
312 	ret = asprintf(&child->name, "SVE-VL-%d-%d", vl, cpu);  in start_sve()
316 	ksft_print_msg("Started %s\n", child->name);  in start_sve()
319 static void start_ssve(struct child_data *child, int vl, int cpu)  in start_ssve()  argument
327 	child_start(child, "./ssve-test");  in start_ssve()
329 	ret = asprintf(&child->name, "SSVE-VL-%d-%d", vl, cpu);  in start_ssve()
333 	ksft_print_msg("Started %s\n", child->name);  in start_ssve()
336 static void start_za(struct child_data *child, int vl, int cpu)  in start_za()  argument
344 	child_start(child, "./za-test");  in start_za()
346 	ret = asprintf(&child->name, "ZA-VL-%d-%d", vl, cpu);  in start_za()
350 	ksft_print_msg("Started %s\n", child->name);  in start_za()