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/*
* Check decoding of prctl PR_SCHED_CORE operation.
*
* Copyright (c) 2021 Eugene Syromyatnikov <evgsyr@gmail.com>.
* Copyright (c) 2021-2024 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/prctl.h>
#include "pidns.h"
struct op_str {
unsigned int op;
const char *str;
};
#ifdef INJECT_RETVAL
# define NUM_SKIP 256
# define INJ_STR " (INJECTED)"
#else
# define NUM_SKIP 1
# define INJ_STR ""
#endif
int
main(int argc, char *argv[])
{
PIDNS_TEST_INIT;
long rc;
unsigned long num_skip = NUM_SKIP;
if (argc >= 2)
num_skip = strtoul(argv[1], NULL, 0);
for (size_t i = 0; i < num_skip; i++) {
rc = prctl_marker();
#ifdef PIDNS_TRANSLATION
const char *errstr = sprintrc(rc);
pidns_print_leader();
printf("prctl(" XLAT_UNKNOWN(0xffffffff, "PR_???")
", 0xfffffffe, 0xfffffffd, 0xfffffffc, 0xfffffffb) = ");
if (rc < 0) {
puts(errstr);
} else {
printf("%ld (INJECTED)\n", rc);
}
#endif
if (rc < 0)
continue;
break;
}
static const struct {
unsigned int decode_ptr:1,
valid:1;
unsigned int op;
const char *str;
} ops[] = {
{ true, true, ARG_STR(PR_SCHED_CORE_GET) },
{ false, true, ARG_STR(PR_SCHED_CORE_CREATE) },
{ false, true, ARG_STR(PR_SCHED_CORE_SHARE_TO) },
{ false, true, ARG_STR(PR_SCHED_CORE_SHARE_FROM) },
{ false, false, 4, "PR_SCHED_CORE_???" },
};
static const struct strval32 pidtypes[] = {
{ 0, "PIDTYPE_PID" },
{ 1, "PIDTYPE_TGID" },
{ 2, "PIDTYPE_PGID" },
{ 3, "PIDTYPE_SID" },
{ 4, "PIDTYPE_???" },
{ -1U, "PIDTYPE_???" },
};
int ids[5];
ids[0] = syscall(__NR_gettid);
ids[1] = getpid();
ids[2] = getpgid(0);
ids[3] = getsid(0);
ids[4] = -1;
TAIL_ALLOC_OBJECT_CONST_PTR(uint64_t, uptr);
uint64_t *uptrs[] = { NULL, uptr + 1, uptr };
for (size_t i = 0; i < ARRAY_SIZE(ops); i++) {
for (size_t j = 0; j < ARRAY_SIZE(pidtypes); j++) {
for (size_t k = 0; k < ARRAY_SIZE(uptrs); k++) {
*uptr = 0xdeadc0debadc0dedULL;
rc = syscall(__NR_prctl, PR_SCHED_CORE,
ops[i].op | F8ILL_KULONG_MASK,
ids[MIN(pidtypes[j].val, 4)]
| F8ILL_KULONG_MASK,
pidtypes[j].val
| F8ILL_KULONG_MASK,
uptrs[k]);
const char *errstr = sprintrc(rc);
pidns_print_leader();
printf("prctl("
XLAT_KNOWN(0x3e, "PR_SCHED_CORE") ", ");
if (ops[i].valid) {
printf(XLAT_FMT,
XLAT_SEL(ops[i].op, ops[i].str));
} else {
printf("%#x"
NRAW(" /* PR_SCHED_CORE_??? */"),
ops[i].op);
}
printf(", %d%s, %#x" NRAW(" /* %s */") ", ",
ids[MIN(pidtypes[j].val, 4)],
pidns_pid2str(pidtypes[j].val),
pidtypes[j].val
#if !XLAT_RAW
, pidtypes[j].str
#endif
);
if (uptrs[k]) {
if (uptrs[k] == uptr
&& ops[i].decode_ptr && rc >= 0)
#ifdef INJECT_RETVAL
printf("[0xdeadc0debadc0ded]");
#else
printf("[%#" PRIx64 "]", *uptr);
#endif
else
printf("%p", uptrs[k]);
} else {
printf("NULL");
}
printf(") = %s" INJ_STR "\n", errstr);
}
}
}
pidns_print_leader();
puts("+++ exited with 0 +++");
return 0;
}
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