1327 			   pid_t tracee, int status, void *args);
1329 void start_tracer(struct __test_metadata *_metadata, int fd, pid_t tracee,  in start_tracer()  argument
1343 		ret = ptrace(PTRACE_ATTACH, tracee, NULL, 0);  in start_tracer()
1345 		kill(tracee, SIGKILL);  in start_tracer()
1350 	ret = ptrace(PTRACE_SETOPTIONS, tracee, NULL, ptrace_syscall ?  in start_tracer()
1355 		kill(tracee, SIGKILL);  in start_tracer()
1358 		     tracee, NULL, 0);  in start_tracer()
1369 		if (wait(&status) != tracee)  in start_tracer()
1378 		tracer_func(_metadata, tracee, status, args);  in start_tracer()
1381 			     tracee, NULL, 0);  in start_tracer()
1397 	pid_t tracee = getpid();  in setup_trace_fixture()  local
1408 		start_tracer(_metadata, pipefd[1], tracee, func, args,  in setup_trace_fixture()
1440 void tracer_poke(struct __test_metadata *_metadata, pid_t tracee, int status,  in tracer_poke()  argument
1447 	ret = ptrace(PTRACE_GETEVENTMSG, tracee, NULL, &msg);  in tracer_poke()
1451 		kill(tracee, SIGKILL);  in tracer_poke()
1458 	ret = ptrace(PTRACE_POKEDATA, tracee, info->poke_addr, 0x1001);  in tracer_poke()
1585 int get_syscall(struct __test_metadata *_metadata, pid_t tracee)  in get_syscall()  argument
1589 	EXPECT_EQ(0, ptrace(PTRACE_GETREGS, tracee, 0, &regs)) {  in get_syscall()
1598 	EXPECT_EQ(0, ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &iov)) {  in get_syscall()
1613 		    pid_t tracee, int syscall)  in change_syscall()  argument
1618 	ret = ptrace(PTRACE_GETREGS, tracee, 0, &regs);  in change_syscall()
1623 	ret = ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &iov);  in change_syscall()
1645 		ret = ptrace(PTRACE_SET_SYSCALL, tracee, NULL, syscall);  in change_syscall()
1656 		ret = ptrace(PTRACE_SETREGSET, tracee, NT_ARM_SYSTEM_CALL,  in change_syscall()
1676 	ret = ptrace(PTRACE_SETREGS, tracee, 0, &regs);  in change_syscall()
1680 	ret = ptrace(PTRACE_SETREGSET, tracee, NT_PRSTATUS, &iov);  in change_syscall()
1685 void tracer_syscall(struct __test_metadata *_metadata, pid_t tracee,  in tracer_syscall()  argument
1692 	ret = ptrace(PTRACE_GETEVENTMSG, tracee, NULL, &msg);  in tracer_syscall()
1699 		EXPECT_EQ(__NR_getpid, get_syscall(_metadata, tracee));  in tracer_syscall()
1700 		change_syscall(_metadata, tracee, __NR_getppid);  in tracer_syscall()
1704 		EXPECT_EQ(__NR_gettid, get_syscall(_metadata, tracee));  in tracer_syscall()
1705 		change_syscall(_metadata, tracee, -1);  in tracer_syscall()
1709 		EXPECT_EQ(__NR_getppid, get_syscall(_metadata, tracee));  in tracer_syscall()
1714 			kill(tracee, SIGKILL);  in tracer_syscall()
1720 void tracer_ptrace(struct __test_metadata *_metadata, pid_t tracee,  in tracer_ptrace()  argument
1728 	ret = ptrace(PTRACE_GETEVENTMSG, tracee, NULL, &msg);  in tracer_ptrace()
1737 	nr = get_syscall(_metadata, tracee);  in tracer_ptrace()
1740 		change_syscall(_metadata, tracee, __NR_getppid);  in tracer_ptrace()
1742 		change_syscall(_metadata, tracee, -1);  in tracer_ptrace()