1 /*
2 * Check decoding of perf_event_open syscall.
3 *
4 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
5 * Copyright (c) 2016-2017 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "tests.h"
32 #include <asm/unistd.h>
33
34 #if defined(__NR_perf_event_open) && defined(HAVE_LINUX_PERF_EVENT_H)
35
36 # include <limits.h>
37 # include <stdio.h>
38 # include <unistd.h>
39
40 # include <linux/perf_event.h>
41
42 # include "xlat.h"
43 # include "xlat/perf_event_open_flags.h"
44
45 #if ULONG_MAX > UINT_MAX
46 #define LONG_STR_PREFIX "ffffffff"
47 #else
48 #define LONG_STR_PREFIX ""
49 #endif
50
printaddr(void * ptr)51 static const char *printaddr(void *ptr)
52 {
53 static char buf[sizeof("0x") + sizeof(void *) * 2];
54
55 if (ptr == NULL)
56 return "NULL";
57
58 snprintf(buf, sizeof(buf), "%#lx", (unsigned long)ptr);
59
60 return buf;
61 }
62
63 int
main(void)64 main(void)
65 {
66 TAIL_ALLOC_OBJECT_CONST_PTR(struct perf_event_attr, attr);
67
68 attr->type = PERF_TYPE_HARDWARE;
69 attr->size = sizeof(*attr);
70
71 struct {
72 struct perf_event_attr *attr;
73 pid_t pid;
74 int cpu;
75 int group_fd;
76 unsigned long flags;
77 const char *flags_str;
78 } args[] = {
79 { NULL, 0xfacef00d, 0xbadabba7, -1,
80 (unsigned long) 0xFFFFFFFFFFFFFFFFLLU,
81 "PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
82 "PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC|"
83 "0x" LONG_STR_PREFIX "fffffff0"
84 },
85 { attr + 1, 0, 0, 0,
86 0, "0" },
87 { attr, -1, -1, 1,
88 PERF_FLAG_FD_CLOEXEC, "PERF_FLAG_FD_CLOEXEC" },
89 { attr - 1, -100, 100, 0xface1e55,
90 PERF_FLAG_FD_NO_GROUP | PERF_FLAG_FD_OUTPUT |
91 PERF_FLAG_PID_CGROUP | PERF_FLAG_FD_CLOEXEC,
92 "PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
93 "PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC" },
94 };
95 size_t i;
96 int rc;
97
98 for (i = 0; i < ARRAY_SIZE(args); i++) {
99 rc = syscall(__NR_perf_event_open, args[i].attr, args[i].pid,
100 args[i].cpu, args[i].group_fd, args[i].flags);
101 printf("perf_event_open(%s, %d, %d, %d, %s) = %s\n",
102 printaddr(args[i].attr), args[i].pid, args[i].cpu,
103 args[i].group_fd, args[i].flags_str, sprintrc(rc));
104 }
105
106 puts("+++ exited with 0 +++");
107 return 0;
108 }
109
110 #else
111
112 SKIP_MAIN_UNDEFINED("__NR_perf_event_open && HAVE_LINUX_PERF_EVENT_H");
113
114 #endif
115