tools/perf/trace/beauty/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 <sys/types.h>
  11 #include <uapi/linux/sched.h>
  12
  13 static 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
  58 size_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 }