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/*
* Check decoding of perf_event_open syscall.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <asm/unistd.h>
#if defined(__NR_perf_event_open) && defined(HAVE_LINUX_PERF_EVENT_H)
# include <limits.h>
# include <stdio.h>
# include <unistd.h>
# include <linux/perf_event.h>
# include "xlat.h"
# include "xlat/perf_event_open_flags.h"
# if ULONG_MAX > UINT_MAX
# define LONG_STR_PREFIX "ffffffff"
# else
# define LONG_STR_PREFIX ""
# endif
static const char *printaddr(void *ptr)
{
static char buf[sizeof("0x") + sizeof(void *) * 2];
if (ptr == NULL)
return "NULL";
snprintf(buf, sizeof(buf), "%#lx", (unsigned long)ptr);
return buf;
}
int
main(void)
{
TAIL_ALLOC_OBJECT_CONST_PTR(struct perf_event_attr, attr);
attr->type = PERF_TYPE_HARDWARE;
attr->size = sizeof(*attr);
struct {
struct perf_event_attr *attr;
pid_t pid;
int cpu;
int group_fd;
unsigned long flags;
const char *flags_str;
} args[] = {
{ NULL, 0xfacef00d, 0xbadabba7, -1,
(unsigned long) 0xFFFFFFFFFFFFFFFFLLU,
"PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
"PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC|"
"0x" LONG_STR_PREFIX "fffffff0"
},
{ attr + 1, 0, 0, 0,
0, "0" },
{ attr, -1, -1, 1,
PERF_FLAG_FD_CLOEXEC, "PERF_FLAG_FD_CLOEXEC" },
{ attr - 1, -100, 100, 0xface1e55,
PERF_FLAG_FD_NO_GROUP | PERF_FLAG_FD_OUTPUT |
PERF_FLAG_PID_CGROUP | PERF_FLAG_FD_CLOEXEC,
"PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
"PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC" },
};
size_t i;
int rc;
for (i = 0; i < ARRAY_SIZE(args); i++) {
rc = syscall(__NR_perf_event_open, args[i].attr, args[i].pid,
args[i].cpu, args[i].group_fd, args[i].flags);
printf("perf_event_open(%s, %d, %d, %d, %s) = %s\n",
printaddr(args[i].attr), args[i].pid, args[i].cpu,
args[i].group_fd, args[i].flags_str, sprintrc(rc));
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_perf_event_open && HAVE_LINUX_PERF_EVENT_H");
#endif
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