clone.c

 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 <linux/log2.h>
11#include <sys/types.h>
12#include <sched.h>
13
14static size_t clone__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
15{
16#include "trace/beauty/generated/clone_flags_array.c"
17	static DEFINE_STRARRAY(clone_flags, "CLONE_");
18
19	return strarray__scnprintf_flags(&strarray__clone_flags, bf, size, show_prefix, flags);
20}
21
22size_t syscall_arg__scnprintf_clone_flags(char *bf, size_t size, struct syscall_arg *arg)
23{
24	unsigned long flags = arg->val;
25	enum syscall_clone_args {
26		SCC_FLAGS	  = (1 << 0),
27		SCC_CHILD_STACK	  = (1 << 1),
28		SCC_PARENT_TIDPTR = (1 << 2),
29		SCC_CHILD_TIDPTR  = (1 << 3),
30		SCC_TLS		  = (1 << 4),
31	};
32	if (!(flags & CLONE_PARENT_SETTID))
33		arg->mask |= SCC_PARENT_TIDPTR;
34
35	if (!(flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)))
36		arg->mask |= SCC_CHILD_TIDPTR;
37
38	if (!(flags & CLONE_SETTLS))
39		arg->mask |= SCC_TLS;
40
41	return clone__scnprintf_flags(flags, bf, size, arg->show_string_prefix);
42}