Dmitry V. Levin
d6c71dd061
Indent the C preprocessor directives to reflect their nesting using the following script: $ cppi -l $(git grep -El '^[[:space:]]*#[[:space:]]*(if|ifdef|ifndef|elif|else|endif|define|pragma)[[:space:]]' |grep -v '\.sh$') |while read f; do cppi < "$f" > "$f".cppi; mv "$f".cppi "$f" done
95 lines
2.2 KiB
C
95 lines
2.2 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) 2016-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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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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