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/*
* Check decoding of successful PERF_EVENT_IOC_{ID,QUERY_BPF} ioctls.
*
* Copyright (c) 2018-2020 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <assert.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#ifdef HAVE_LINUX_PERF_EVENT_H
# include <linux/perf_event.h>
#endif
#ifndef PERF_EVENT_IOC_ID
# define PERF_EVENT_IOC_ID _IOR('$', 7, void *)
#endif
#ifndef PERF_EVENT_IOC_QUERY_BPF
# define PERF_EVENT_IOC_QUERY_BPF _IOWR('$', 10, void *)
struct perf_event_query_bpf {
uint32_t ids_len;
uint32_t prog_cnt;
uint32_t ids[0];
};
#endif
int
main(int argc, char **argv)
{
static const uint64_t magic64 = 0xfacefeeddeadc0deULL;
TAIL_ALLOC_OBJECT_CONST_PTR(uint64_t, u64_ptr);
uint64_t *const u64_efault = u64_ptr + 1;
uint32_t *const u32_arr = tail_alloc(sizeof(uint32_t) * 4);
uint32_t *const u32_efault = u32_arr + 4;
unsigned long num_skip;
long inject_retval;
bool locked = false;
*u64_ptr = magic64;
if (argc == 1)
return 0;
if (argc < 3)
error_msg_and_fail("Usage: %s NUM_SKIP INJECT_RETVAL", argv[0]);
num_skip = strtoul(argv[1], NULL, 0);
inject_retval = strtol(argv[2], NULL, 0);
if (inject_retval < 0)
error_msg_and_fail("Expected non-negative INJECT_RETVAL, "
"but got %ld", inject_retval);
for (unsigned long i = 0; i < num_skip; i++) {
long ret = ioctl(-1, PERF_EVENT_IOC_ID, NULL);
printf("ioctl(-1, PERF_EVENT_IOC_ID, NULL) = %s%s\n",
sprintrc(ret),
ret == inject_retval ? " (INJECTED)" : "");
if (ret != inject_retval)
continue;
locked = true;
break;
}
if (!locked)
error_msg_and_fail("Hasn't locked on ioctl(-1"
", PERF_EVENT_IOC_ID, NULL) returning %lu",
inject_retval);
/* PERF_EVENT_IOC_ID */
assert(ioctl(-1, PERF_EVENT_IOC_ID, NULL) == inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_ID, NULL) = %ld (INJECTED)\n",
inject_retval);
assert(ioctl(-1, PERF_EVENT_IOC_ID, u64_efault) == inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_ID, %p) = %ld (INJECTED)\n",
u64_efault, inject_retval);
assert(ioctl(-1, PERF_EVENT_IOC_ID, u64_ptr) == inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_ID, [%" PRIu64 "]) = %ld (INJECTED)\n",
magic64, inject_retval);
/* PERF_EVENT_IOC_QUERY_BPF */
assert(ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, NULL) == inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, NULL) = %ld (INJECTED)\n",
inject_retval);
assert(ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, u32_efault)
== inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, %p) = %ld (INJECTED)\n",
u32_efault, inject_retval);
u32_arr[3] = 0xdeadbeef;
assert(ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, u32_arr + 3)
== inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, {ids_len=3735928559, ...}) "
"= %ld (INJECTED)\n",
inject_retval);
u32_arr[2] = 0xdecaffed;
assert(ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, u32_arr + 2)
== inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, {ids_len=3737845741"
", prog_cnt=3735928559, ids=%p})"
" = %ld (INJECTED)\n",
u32_efault, inject_retval);
u32_arr[0] = 0xbadc0ded;
u32_arr[1] = 5;
assert(ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, u32_arr) == inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, {ids_len=3134983661"
", prog_cnt=5, ids=[3737845741, 3735928559, ... /* %p */]})"
" = %ld (INJECTED)\n",
u32_efault, inject_retval);
u32_arr[1] = 2;
assert(ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, u32_arr) == inject_retval);
printf("ioctl(-1, PERF_EVENT_IOC_QUERY_BPF, {ids_len=3134983661"
", prog_cnt=2, ids=[3737845741, 3735928559]})"
" = %ld (INJECTED)\n",
inject_retval);
puts("+++ exited with 0 +++");
return 0;
}
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