1310 			   pid_t tracee, int status, void *args);
1312 void start_tracer(struct __test_metadata *_metadata, int fd, pid_t tracee,  in start_tracer()  argument
1326 		ret = ptrace(PTRACE_ATTACH, tracee, NULL, 0);  in start_tracer()
1328 		kill(tracee, SIGKILL);  in start_tracer()
1333 	ret = ptrace(PTRACE_SETOPTIONS, tracee, NULL, ptrace_syscall ?  in start_tracer()
1338 		kill(tracee, SIGKILL);  in start_tracer()
1341 		     tracee, NULL, 0);  in start_tracer()
1352 		if (wait(&status) != tracee)  in start_tracer()
1361 		tracer_func(_metadata, tracee, status, args);  in start_tracer()
1364 			     tracee, NULL, 0);  in start_tracer()
1380 	pid_t tracee = getpid();  in setup_trace_fixture()  local
1391 		start_tracer(_metadata, pipefd[1], tracee, func, args,  in setup_trace_fixture()
1423 void tracer_poke(struct __test_metadata *_metadata, pid_t tracee, int status,  in tracer_poke()  argument
1430 	ret = ptrace(PTRACE_GETEVENTMSG, tracee, NULL, &msg);  in tracer_poke()
1434 		kill(tracee, SIGKILL);  in tracer_poke()
1441 	ret = ptrace(PTRACE_POKEDATA, tracee, info->poke_addr, 0x1001);  in tracer_poke()
1577 int get_syscall(struct __test_metadata *_metadata, pid_t tracee)  in get_syscall()  argument
1581 	EXPECT_EQ(0, ptrace(PTRACE_GETREGS, tracee, 0, &regs)) {  in get_syscall()
1590 	EXPECT_EQ(0, ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &iov)) {  in get_syscall()
1605 		    pid_t tracee, int syscall, int result)  in change_syscall()  argument
1610 	ret = ptrace(PTRACE_GETREGS, tracee, 0, &regs);  in change_syscall()
1615 	ret = ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &iov);  in change_syscall()
1637 		ret = ptrace(PTRACE_SET_SYSCALL, tracee, NULL, syscall);  in change_syscall()
1648 		ret = ptrace(PTRACE_SETREGSET, tracee, NT_ARM_SYSTEM_CALL,  in change_syscall()
1668 	ret = ptrace(PTRACE_SETREGS, tracee, 0, &regs);  in change_syscall()
1672 	ret = ptrace(PTRACE_SETREGSET, tracee, NT_PRSTATUS, &iov);  in change_syscall()
1677 void tracer_syscall(struct __test_metadata *_metadata, pid_t tracee,  in tracer_syscall()  argument
1684 	ret = ptrace(PTRACE_GETEVENTMSG, tracee, NULL, &msg);  in tracer_syscall()
1691 		EXPECT_EQ(__NR_getpid, get_syscall(_metadata, tracee));  in tracer_syscall()
1692 		change_syscall(_metadata, tracee, __NR_getppid, 0);  in tracer_syscall()
1696 		EXPECT_EQ(__NR_gettid, get_syscall(_metadata, tracee));  in tracer_syscall()
1697 		change_syscall(_metadata, tracee, -1, 45000);  in tracer_syscall()
1701 		EXPECT_EQ(__NR_openat, get_syscall(_metadata, tracee));  in tracer_syscall()
1702 		change_syscall(_metadata, tracee, -1, -ESRCH);  in tracer_syscall()
1706 		EXPECT_EQ(__NR_getppid, get_syscall(_metadata, tracee));  in tracer_syscall()
1711 			kill(tracee, SIGKILL);  in tracer_syscall()
1717 void tracer_ptrace(struct __test_metadata *_metadata, pid_t tracee,  in tracer_ptrace()  argument
1725 	ret = ptrace(PTRACE_GETEVENTMSG, tracee, NULL, &msg);  in tracer_ptrace()
1734 	nr = get_syscall(_metadata, tracee);  in tracer_ptrace()
1737 		change_syscall(_metadata, tracee, __NR_getppid, 0);  in tracer_ptrace()
1739 		change_syscall(_metadata, tracee, -1, 45000);  in tracer_ptrace()
1741 		change_syscall(_metadata, tracee, -1, -ESRCH);  in tracer_ptrace()