tools/perf/trace/beauty/kcmp.c

   1 /*
   2  * trace/beauty/kcmp.c
   3  *
   4  *  Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   5  *
   6  * Released under the GPL v2. (and only v2, not any later version)
   7  */
   8
   9 #include "trace/beauty/beauty.h"
  10 #include <linux/kernel.h>
  11 #include <sys/types.h>
  12 #include <machine.h>
  13 #include <uapi/linux/kcmp.h>
  14
  15 #include "trace/beauty/generated/kcmp_type_array.c"
  16
  17 size_t syscall_arg__scnprintf_kcmp_idx(char *bf, size_t size, struct syscall_arg *arg)
  18 {
  19         unsigned long fd = arg->val;
  20         int type = syscall_arg__val(arg, 2);
  21         pid_t pid;
  22
  23         if (type != KCMP_FILE)
  24                 return syscall_arg__scnprintf_long(bf, size, arg);
  25
  26         pid = syscall_arg__val(arg, arg->idx == 3 ? 0 : 1); /* idx1 -> pid1, idx2 -> pid2 */
  27         return pid__scnprintf_fd(arg->trace, pid, fd, bf, size);
  28 }
  29
  30 static size_t kcmp__scnprintf_type(int type, char *bf, size_t size)
  31 {
  32         static DEFINE_STRARRAY(kcmp_types);
  33         return strarray__scnprintf(&strarray__kcmp_types, bf, size, "%d", type);
  34 }
  35
  36 size_t syscall_arg__scnprintf_kcmp_type(char *bf, size_t size, struct syscall_arg *arg)
  37 {
  38         unsigned long type = arg->val;
  39
  40         if (type != KCMP_FILE)
  41                 arg->mask |= (1 << 3) | (1 << 4); /* Ignore idx1 and idx2 */
  42
  43         return kcmp__scnprintf_type(type, bf, size);
  44 }