60 static void child_start(struct child_data *child, const char *program)  in child_start()  argument
70 	child->pid = fork();  in child_start()
71 	if (child->pid == -1)  in child_start()
75 	if (!child->pid) {  in child_start()
128 		child->stdout = pipefd[0];  in child_start()
129 		child->output = NULL;  in child_start()
130 		child->exited = false;  in child_start()
131 		child->output_seen = false;  in child_start()
134 		ev.data.ptr = child;  in child_start()
136 		ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, child->stdout, &ev);  in child_start()
139 					   child->name, strerror(errno), errno);  in child_start()
144 static bool child_output_read(struct child_data *child)  in child_output_read()  argument
150 	ret = read(child->stdout, read_data, sizeof(read_data));  in child_output_read()
156 			       child->name, strerror(errno),  in child_output_read()
162 	child->output_seen = true;  in child_output_read()
165 	if (child->output) {  in child_output_read()
166 		strncpy(work, child->output, sizeof(work) - 1);  in child_output_read()
168 		free(child->output);  in child_output_read()
169 		child->output = NULL;  in child_output_read()
180 			ksft_print_msg("%s: %s\n", child->name, work);  in child_output_read()
189 		ret = asprintf(&child->output, "%s", work);  in child_output_read()
197 static void child_output(struct child_data *child, uint32_t events,  in child_output()  argument
204 			read_more = child_output_read(child);  in child_output()
209 		close(child->stdout);  in child_output()
210 		child->stdout = -1;  in child_output()
214 	if (flush && child->output) {  in child_output()
215 		ksft_print_msg("%s: %s<EOF>\n", child->name, child->output);  in child_output()
216 		free(child->output);  in child_output()
217 		child->output = NULL;  in child_output()
221 static void child_tickle(struct child_data *child)  in child_tickle()  argument
223 	if (child->output_seen && !child->exited)  in child_tickle()
224 		kill(child->pid, SIGUSR2);  in child_tickle()
227 static void child_stop(struct child_data *child)  in child_stop()  argument
229 	if (!child->exited)  in child_stop()
230 		kill(child->pid, SIGTERM);  in child_stop()
233 static void child_cleanup(struct child_data *child)  in child_cleanup()  argument
239 	if (!child->exited) {  in child_cleanup()
241 			ret = waitpid(child->pid, &status, 0);  in child_cleanup()
247 					       child->pid, strerror(errno),  in child_cleanup()
253 		child->exit_status = WEXITSTATUS(status);  in child_cleanup()
256 	if (!child->output_seen) {  in child_cleanup()
257 		ksft_print_msg("%s no output seen\n", child->name);  in child_cleanup()
261 	if (child->exit_status != 0) {  in child_cleanup()
263 			       child->name, child->exit_status);  in child_cleanup()
267 	ksft_test_result(!fail, "%s\n", child->name);  in child_cleanup()
309 static void start_fpsimd(struct child_data *child, int cpu, int copy)  in start_fpsimd()  argument
313 	ret = asprintf(&child->name, "FPSIMD-%d-%d", cpu, copy);  in start_fpsimd()
317 	child_start(child, "./fpsimd-test");  in start_fpsimd()
319 	ksft_print_msg("Started %s\n", child->name);  in start_fpsimd()
322 static void start_kernel(struct child_data *child, int cpu, int copy)  in start_kernel()  argument
326 	ret = asprintf(&child->name, "KERNEL-%d-%d", cpu, copy);  in start_kernel()
330 	child_start(child, "./kernel-test");  in start_kernel()
332 	ksft_print_msg("Started %s\n", child->name);  in start_kernel()
335 static void start_sve(struct child_data *child, int vl, int cpu)  in start_sve()  argument
343 	ret = asprintf(&child->name, "SVE-VL-%d-%d", vl, cpu);  in start_sve()
347 	child_start(child, "./sve-test");  in start_sve()
349 	ksft_print_msg("Started %s\n", child->name);  in start_sve()
352 static void start_ssve(struct child_data *child, int vl, int cpu)  in start_ssve()  argument
356 	ret = asprintf(&child->name, "SSVE-VL-%d-%d", vl, cpu);  in start_ssve()
364 	child_start(child, "./ssve-test");  in start_ssve()
366 	ksft_print_msg("Started %s\n", child->name);  in start_ssve()
369 static void start_za(struct child_data *child, int vl, int cpu)  in start_za()  argument
377 	ret = asprintf(&child->name, "ZA-VL-%d-%d", vl, cpu);  in start_za()
381 	child_start(child, "./za-test");  in start_za()
383 	ksft_print_msg("Started %s\n", child->name);  in start_za()
386 static void start_zt(struct child_data *child, int cpu)  in start_zt()  argument
390 	ret = asprintf(&child->name, "ZT-%d", cpu);  in start_zt()
394 	child_start(child, "./zt-test");  in start_zt()
396 	ksft_print_msg("Started %s\n", child->name);  in start_zt()