115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/*
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* Check decoding of perf_event_open syscall.
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*
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
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* Copyright (c) 2016-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#if defined(__NR_perf_event_open) && defined(HAVE_LINUX_PERF_EVENT_H)
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# include <limits.h>
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# include <stdio.h>
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# include <unistd.h>
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# include <linux/perf_event.h>
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# include "xlat.h"
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# include "xlat/perf_event_open_flags.h"
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#if ULONG_MAX > UINT_MAX
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#define LONG_STR_PREFIX "ffffffff"
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#else
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#define LONG_STR_PREFIX ""
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#endif
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static const char *printaddr(void *ptr)
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{
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static char buf[sizeof("0x") + sizeof(void *) * 2];
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if (ptr == NULL)
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return "NULL";
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snprintf(buf, sizeof(buf), "%#lx", (unsigned long)ptr);
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return buf;
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}
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int
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main(void)
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{
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TAIL_ALLOC_OBJECT_CONST_PTR(struct perf_event_attr, attr);
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attr->type = PERF_TYPE_HARDWARE;
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attr->size = sizeof(*attr);
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struct {
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struct perf_event_attr *attr;
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pid_t pid;
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int cpu;
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int group_fd;
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unsigned long flags;
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const char *flags_str;
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} args[] = {
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{ NULL, 0xfacef00d, 0xbadabba7, -1,
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(unsigned long) 0xFFFFFFFFFFFFFFFFLLU,
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"PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
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"PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC|"
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"0x" LONG_STR_PREFIX "fffffff0"
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},
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{ attr + 1, 0, 0, 0,
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0, "0" },
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{ attr, -1, -1, 1,
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PERF_FLAG_FD_CLOEXEC, "PERF_FLAG_FD_CLOEXEC" },
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{ attr - 1, -100, 100, 0xface1e55,
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PERF_FLAG_FD_NO_GROUP | PERF_FLAG_FD_OUTPUT |
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PERF_FLAG_PID_CGROUP | PERF_FLAG_FD_CLOEXEC,
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"PERF_FLAG_FD_NO_GROUP|PERF_FLAG_FD_OUTPUT|"
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"PERF_FLAG_PID_CGROUP|PERF_FLAG_FD_CLOEXEC" },
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};
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size_t i;
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int rc;
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for (i = 0; i < ARRAY_SIZE(args); i++) {
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rc = syscall(__NR_perf_event_open, args[i].attr, args[i].pid,
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args[i].cpu, args[i].group_fd, args[i].flags);
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printf("perf_event_open(%s, %d, %d, %d, %s) = %s\n",
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printaddr(args[i].attr), args[i].pid, args[i].cpu,
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args[i].group_fd, args[i].flags_str, sprintrc(rc));
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_perf_event_open && HAVE_LINUX_PERF_EVENT_H");
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#endif
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