LXR linux/tools/perf/trace/beauty/kcmp.c

   1// SPDX-License-Identifier: LGPL-2.1
   2/*
   3 * trace/beauty/kcmp.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 <machine.h>
  12#include <uapi/linux/kcmp.h>
  13
  14#include "trace/beauty/generated/kcmp_type_array.c"
  15
  16size_t syscall_arg__scnprintf_kcmp_idx(char *bf, size_t size, struct syscall_arg *arg)
  17{
  18        unsigned long fd = arg->val;
  19        int type = syscall_arg__val(arg, 2);
  20        pid_t pid;
  21
  22        if (type != KCMP_FILE)
  23                return syscall_arg__scnprintf_long(bf, size, arg);
  24
  25        pid = syscall_arg__val(arg, arg->idx == 3 ? 0 : 1); /* idx1 -> pid1, idx2 -> pid2 */
  26        return pid__scnprintf_fd(arg->trace, pid, fd, bf, size);
  27}
  28
  29static size_t kcmp__scnprintf_type(int type, char *bf, size_t size, bool show_prefix)
  30{
  31        static DEFINE_STRARRAY(kcmp_types, "KCMP_");
  32        return strarray__scnprintf(&strarray__kcmp_types, bf, size, "%d", show_prefix, type);
  33}
  34
  35size_t syscall_arg__scnprintf_kcmp_type(char *bf, size_t size, struct syscall_arg *arg)
  36{
  37        unsigned long type = arg->val;
  38
  39        if (type != KCMP_FILE)
  40                arg->mask |= (1 << 3) | (1 << 4); /* Ignore idx1 and idx2 */
  41
  42        return kcmp__scnprintf_type(type, bf, size, arg->show_string_prefix);
  43}
  44