trace/beauty/kcmp.c

0001 // SPDX-License-Identifier: LGPL-2.1
0002 /*
0003  * trace/beauty/kcmp.c
0004  *
0005  *  Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
0006  */
0007
0008 #include "trace/beauty/beauty.h"
0009 #include <linux/kernel.h>
0010 #include <sys/types.h>
0011 #include <machine.h>
0012 #include <uapi/linux/kcmp.h>
0013
0014 #include "trace/beauty/generated/kcmp_type_array.c"
0015
0016 size_t syscall_arg__scnprintf_kcmp_idx(char *bf, size_t size, struct syscall_arg *arg)
0017 {
0018     unsigned long fd = arg->val;
0019     int type = syscall_arg__val(arg, 2);
0020     pid_t pid;
0021
0022     if (type != KCMP_FILE)
0023         return syscall_arg__scnprintf_long(bf, size, arg);
0024
0025     pid = syscall_arg__val(arg, arg->idx == 3 ? 0 : 1); /* idx1 -> pid1, idx2 -> pid2 */
0026     return pid__scnprintf_fd(arg->trace, pid, fd, bf, size);
0027 }
0028
0029 static size_t kcmp__scnprintf_type(int type, char *bf, size_t size, bool show_prefix)
0030 {
0031     static DEFINE_STRARRAY(kcmp_types, "KCMP_");
0032     return strarray__scnprintf(&strarray__kcmp_types, bf, size, "%d", show_prefix, type);
0033 }
0034
0035 size_t syscall_arg__scnprintf_kcmp_type(char *bf, size_t size, struct syscall_arg *arg)
0036 {
0037     unsigned long type = arg->val;
0038
0039     if (type != KCMP_FILE)
0040         arg->mask |= (1 << 3) | (1 << 4); /* Ignore idx1 and idx2 */
0041
0042     return kcmp__scnprintf_type(type, bf, size, arg->show_string_prefix);
0043 }