1// SPDX-License-Identifier: LGPL-2.1
2/*
3 * trace/beauty/cone.c
4 *
5 *  Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
6 */
7
8#include "trace/beauty/beauty.h"
9#include <linux/kernel.h>
10#include <sys/types.h>
11#include <uapi/linux/sched.h>
12
13static size_t clone__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
14{
15	const char *prefix = "CLONE_";
16	int printed = 0;
17
18#define	P_FLAG(n) \
19	if (flags & CLONE_##n) { \
20		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
21		flags &= ~CLONE_##n; \
22	}
23
24	P_FLAG(VM);
25	P_FLAG(FS);
26	P_FLAG(FILES);
27	P_FLAG(SIGHAND);
28	P_FLAG(PIDFD);
29	P_FLAG(PTRACE);
30	P_FLAG(VFORK);
31	P_FLAG(PARENT);
32	P_FLAG(THREAD);
33	P_FLAG(NEWNS);
34	P_FLAG(SYSVSEM);
35	P_FLAG(SETTLS);
36	P_FLAG(PARENT_SETTID);
37	P_FLAG(CHILD_CLEARTID);
38	P_FLAG(DETACHED);
39	P_FLAG(UNTRACED);
40	P_FLAG(CHILD_SETTID);
41	P_FLAG(NEWCGROUP);
42	P_FLAG(NEWUTS);
43	P_FLAG(NEWIPC);
44	P_FLAG(NEWUSER);
45	P_FLAG(NEWPID);
46	P_FLAG(NEWNET);
47	P_FLAG(IO);
48	P_FLAG(CLEAR_SIGHAND);
49	P_FLAG(INTO_CGROUP);
50#undef P_FLAG
51
52	if (flags)
53		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
54
55	return printed;
56}
57
58size_t syscall_arg__scnprintf_clone_flags(char *bf, size_t size, struct syscall_arg *arg)
59{
60	unsigned long flags = arg->val;
61	enum syscall_clone_args {
62		SCC_FLAGS	  = (1 << 0),
63		SCC_CHILD_STACK	  = (1 << 1),
64		SCC_PARENT_TIDPTR = (1 << 2),
65		SCC_CHILD_TIDPTR  = (1 << 3),
66		SCC_TLS		  = (1 << 4),
67	};
68	if (!(flags & CLONE_PARENT_SETTID))
69		arg->mask |= SCC_PARENT_TIDPTR;
70
71	if (!(flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)))
72		arg->mask |= SCC_CHILD_TIDPTR;
73
74	if (!(flags & CLONE_SETTLS))
75		arg->mask |= SCC_TLS;
76
77	return clone__scnprintf_flags(flags, bf, size, arg->show_string_prefix);
78}
79