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strace/tests/futex.c
Eugene Syromyatnikov 48cb6336d8 tests: update futex test to accommodate the recent kernel change 
Kernel commit v4.14-rc1~162^2~8 refactored futex implementation and
introduced checks for invalid shift sizes.  Accommodate this change
by allowing EINVAL in the corresponding futex checks.

* tests/futex.c (CHECK_FUTEX_GENERIC): Reset errno before the syscall.
(main) <wake_ops>: Add err2 field, describe err/err2 fields.
Add EINVAL as a possible errno to the checks that contain invalid
shift values.
Update return value check so it checks that values are strictly
as expected.

Closes: https://github.com/strace/strace/pull/16
2017-11-03 20:46:47 +00:00

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/*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <asm/unistd.h>
#ifdef __NR_futex
# include <errno.h>
# include <stdarg.h>
# include <stdbool.h>
# include <stdio.h>
# include <stdint.h>
# include <unistd.h>
# include <sys/time.h>
# ifndef FUTEX_PRIVATE_FLAG
# define FUTEX_PRIVATE_FLAG 128
# endif
# ifndef FUTEX_CLOCK_REALTIME
# define FUTEX_CLOCK_REALTIME 256
# endif
# ifndef FUTEX_CMD_MASK
# define FUTEX_CMD_MASK ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
# endif
# include "xlat.h"
# include "xlat/futexops.h"
# include "xlat/futexwakeops.h"
# include "xlat/futexwakecmps.h"
void futex_error(int *uaddr, int op, unsigned long val, unsigned long timeout,
int *uaddr2, unsigned long val3, int rc)
{
perror_msg_and_fail("futex(%p, %#x, %#x, %#lx, %p, %#x) = %d",
uaddr, op, (unsigned) val, timeout, uaddr, (unsigned) val3, rc);
}
# define CHECK_FUTEX_GENERIC(uaddr, op, val, timeout, uaddr2, val3, check, \
enosys) \
do { \
errno = 0; \
rc = syscall(__NR_futex, (uaddr), (op), (val), (timeout), \
(uaddr2), (val3)); \
/* It is here due to EPERM on WAKE_OP on AArch64 */ \
if ((rc == -1) && (errno == EPERM)) \
break; \
if (enosys && (rc == -1) && (errno == ENOSYS)) \
break; \
if (!(check)) \
futex_error((uaddr), (op), (val), \
(unsigned long) (timeout), (int *) (uaddr2), \
(val3), rc); \
} while (0)
# define CHECK_FUTEX_ENOSYS(uaddr, op, val, timeout, uaddr2, val3, check) \
CHECK_FUTEX_GENERIC(uaddr, op, val, timeout, uaddr2, val3, check, 1)
# define CHECK_FUTEX(uaddr, op, val, timeout, uaddr2, val3, check) \
CHECK_FUTEX_GENERIC(uaddr, op, val, timeout, uaddr2, val3, check, 0)
enum argmask {
ARG3 = 1 << 0,
ARG4 = 1 << 1,
ARG5 = 1 << 2,
ARG6 = 1 << 3,
};
void invalid_op(int *val, int op, uint32_t argmask, ...)
{
static const unsigned long args[] = {
(unsigned long) 0xface1e55deadbee1ULL,
(unsigned long) 0xface1e56deadbee2ULL,
(unsigned long) 0xface1e57deadbee3ULL,
(unsigned long) 0xface1e58deadbee4ULL,
};
/* Since timeout value is copied before full op check, we should provide
* some valid timeout address or NULL */
int cmd = op & FUTEX_CMD_MASK;
bool valid_timeout = (cmd == FUTEX_WAIT) || (cmd == FUTEX_LOCK_PI) ||
(cmd == FUTEX_WAIT_BITSET) || (cmd == FUTEX_WAIT_REQUEUE_PI);
bool timeout_is_val2 = (cmd == FUTEX_REQUEUE) ||
(cmd == FUTEX_CMP_REQUEUE) || (cmd == FUTEX_WAKE_OP) ||
(cmd == FUTEX_CMP_REQUEUE_PI);
const char *fmt;
int saved_errno;
int rc;
int i;
va_list ap;
CHECK_FUTEX(val, op, args[0], valid_timeout ? 0 : args[1], args[2],
args[3], (rc == -1) && (errno == ENOSYS));
saved_errno = errno;
printf("futex(%p, %#x /* FUTEX_??? */", val, op);
va_start(ap, argmask);
for (i = 0; i < 4; i++) {
if (argmask & (1 << i)) {
fmt = va_arg(ap, const char *);
printf(", ");
if (((1 << i) == ARG3) || ((1 << i) == ARG6) ||
(((1 << i) == ARG4) && timeout_is_val2))
printf(fmt, (unsigned) args[i]);
else
printf(fmt, args[i]);
}
}
va_end(ap);
errno = saved_errno;
printf(") = -1 ENOSYS (%m)\n");
}
# define CHECK_INVALID_CLOCKRT(op, ...) \
do { \
invalid_op(uaddr, FUTEX_CLOCK_REALTIME | (op), __VA_ARGS__); \
invalid_op(uaddr, FUTEX_CLOCK_REALTIME | FUTEX_PRIVATE_FLAG | \
(op), __VA_ARGS__); \
} while (0)
/* Value which differs from one stored in int *val */
# define VAL ((unsigned long) 0xbadda7a0facefeedLLU)
# define VAL_PR ((unsigned) VAL)
# define VAL2 ((unsigned long) 0xbadda7a0ca7b100dLLU)
# define VAL2_PR ((unsigned) VAL2)
# define VAL3 ((unsigned long) 0xbadda7a09caffee1LLU)
# define VAL3_PR ((unsigned) VAL3)
int
main(int argc, char *argv[])
{
TAIL_ALLOC_OBJECT_CONST_PTR(int, uaddr);
TAIL_ALLOC_OBJECT_CONST_PTR(int, uaddr2);
int rc;
unsigned i;
unsigned j;
uaddr[0] = 0x1deadead;
uaddr2[0] = 0xbadf00d;
TAIL_ALLOC_OBJECT_CONST_PTR(struct timespec, tmout);
tmout->tv_sec = 123;
tmout->tv_nsec = 0xbadc0de;
/* FUTEX_WAIT - check whether uaddr == val and sleep
* Possible flags: PRIVATE, CLOCK_RT (since 4.5)
* 1. uaddr - futex address
* 2. op - FUTEX_WAIT
* 3. val - expected value
* 4. timeout - address to timespec with timeout
* 5. uaddr2 - not used
* 6. val3 - not used
*/
/* uaddr is NULL */
CHECK_FUTEX(NULL, FUTEX_WAIT, VAL, tmout, uaddr2, VAL3,
(rc == -1) && (errno == EFAULT));
printf("futex(NULL, FUTEX_WAIT, %u, {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
/* uaddr is faulty */
CHECK_FUTEX(uaddr + 1, FUTEX_WAIT, VAL, tmout, uaddr2, VAL3,
(rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_WAIT, %u, {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
uaddr + 1, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
/* timeout is faulty */
CHECK_FUTEX(uaddr, FUTEX_WAIT, VAL, tmout + 1, uaddr2, VAL3,
(rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_WAIT, %u, %p) = %s\n",
uaddr, 0xfacefeed, tmout + 1, sprintrc(rc));
/* timeout is invalid */
tmout->tv_sec = 0xdeadbeefU;
tmout->tv_nsec = 0xfacefeedU;
CHECK_FUTEX(uaddr, FUTEX_WAIT, VAL, tmout, uaddr2, VAL3,
(rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_WAIT, %u, {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
tmout->tv_sec = (time_t) 0xcafef00ddeadbeefLL;
tmout->tv_nsec = (long) 0xbadc0dedfacefeedLL;
CHECK_FUTEX(uaddr, FUTEX_WAIT, VAL, tmout, uaddr2, VAL3,
(rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_WAIT, %u, {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
tmout->tv_sec = 123;
tmout->tv_nsec = 0xbadc0de;
/* uaddr is not as provided; uaddr2 is faulty but ignored */
CHECK_FUTEX(uaddr, FUTEX_WAIT, VAL, tmout, uaddr2 + 1, VAL3,
(rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT, %u, {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
/* uaddr is not as provided; uaddr2 is faulty but ignored */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_WAIT, VAL, tmout,
uaddr2 + 1, VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_PRIVATE, %u, {tv_sec=%lld, tv_nsec=%llu})"
" = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
/* Next 2 tests are with CLOCKRT bit set */
/* Valid after v4.4-rc2-27-g337f130 */
CHECK_FUTEX_ENOSYS(uaddr,
FUTEX_CLOCK_REALTIME | FUTEX_WAIT,
VAL, tmout, uaddr2, VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT|FUTEX_CLOCK_REALTIME, %u"
", {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr,
FUTEX_CLOCK_REALTIME | FUTEX_PRIVATE_FLAG | FUTEX_WAIT,
VAL, tmout, uaddr2, 0, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_PRIVATE|FUTEX_CLOCK_REALTIME, %u"
", {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
/* FUTEX_WAIT_BITSET - FUTEX_WAIT which provides additional bitmask
* which should be matched at least in one bit with
* wake mask in order to wake.
* Possible flags: PRIVATE, CLOCKRT
* 1. uaddr - futex address
* 2. op - FUTEX_TRYLOCK_PI
* 3. val - expected value stored in uaddr
* 4. timeout - timeout
* 5. uaddr2 - not used
* 6. val3 - bitmask
*/
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_WAIT_BITSET, VAL, tmout, uaddr2 + 1,
VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_BITSET, %u, {tv_sec=%lld, tv_nsec=%llu}"
", %#x) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), VAL3_PR,
sprintrc(rc));
/* val3 of 0 is invalid */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_WAIT_BITSET, VAL, tmout, uaddr2 + 1, 0,
(rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_WAIT_BITSET, %u, {tv_sec=%lld, tv_nsec=%llu}"
", %#x) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), 0, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_WAIT_BITSET, VAL,
tmout, uaddr2 + 1, VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_BITSET_PRIVATE, %u"
", {tv_sec=%lld, tv_nsec=%llu}, %#x) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), VAL3_PR,
sprintrc(rc));
/* Next 3 tests are with CLOCKRT bit set */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_CLOCK_REALTIME | FUTEX_WAIT_BITSET, VAL,
tmout, uaddr2 + 1, VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, %u"
", {tv_sec=%lld, tv_nsec=%llu}, %#x) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), VAL3_PR,
sprintrc(rc));
/* val3 of 0 is invalid */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_CLOCK_REALTIME | FUTEX_WAIT_BITSET, VAL,
tmout, uaddr2 + 1, 0, (rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, %u"
", {tv_sec=%lld, tv_nsec=%llu}, %#x) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), 0, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_CLOCK_REALTIME | FUTEX_PRIVATE_FLAG |
FUTEX_WAIT_BITSET, VAL, tmout, uaddr2 + 1, VAL3,
(rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, %u"
", {tv_sec=%lld, tv_nsec=%llu}, %#x) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), VAL3_PR,
sprintrc(rc));
/* FUTEX_WAKE - wake val processes waiting for uaddr
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_WAKE
* 3. val - how many processes to wake
* 4. timeout - not used
* 5. uaddr2 - not used
* 6. val3 - not used
*/
/* Zero processes to wake is not a good idea, but it should return 0 */
CHECK_FUTEX(uaddr, FUTEX_WAKE, 0, NULL, NULL, 0, (rc == 0));
printf("futex(%p, FUTEX_WAKE, %u) = %s\n", uaddr, 0, sprintrc(rc));
/* Trying to wake some processes, but there's nothing to wake */
CHECK_FUTEX(uaddr, FUTEX_WAKE, 10, NULL, NULL, 0, (rc == 0));
printf("futex(%p, FUTEX_WAKE, %u) = %s\n", uaddr, 10, sprintrc(rc));
/* Trying to wake some processes, but there's nothing to wake */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_WAKE, 10, NULL,
NULL, 0, (rc == 0));
printf("futex(%p, FUTEX_WAKE_PRIVATE, %u) = %s\n", uaddr, 10,
sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_WAKE, ARG3, "%u");
/* FUTEX_WAKE_BITSET - wake val processes waiting for uaddr which has at
* least one common bit with bitset provided in
* val3.
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_WAKE
* 3. val - how many processes to wake
* 4. timeout - not used
* 5. uaddr2 - not used
* 6. val3 - bitmask
*/
/* Trying to wake some processes, but there's nothing to wake */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_WAKE_BITSET, 10, NULL, NULL,
VAL3, (rc == 0));
printf("futex(%p, FUTEX_WAKE_BITSET, %u, %#x) = %s\n", uaddr, 10,
VAL3_PR, sprintrc(rc));
/* bitset 0 is invalid */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_WAKE_BITSET, 10, NULL, NULL, 0,
(rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_WAKE_BITSET, %u, %#x) = %s\n", uaddr, 10, 0,
sprintrc(rc));
/* Trying to wake some processes, but there's nothing to wake */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_WAKE_BITSET, 10,
NULL, NULL, VAL3, (rc == 0));
printf("futex(%p, FUTEX_WAKE_BITSET_PRIVATE, %u, %#x) = %s\n", uaddr,
10, VAL3_PR, sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_WAKE_BITSET, ARG3 | ARG6, "%u", "%#x");
/* FUTEX_FD - deprecated
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_FD
* 3. val - signal number
* 4. timeout - not used
* 5. uaddr2 - not used
* 6. val3 - not used
*/
/* FUTEX_FD is not implemented since 2.6.26 */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_FD, VAL, NULL, NULL, VAL3,
(rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_FD, %u) = %s\n", uaddr, VAL_PR, sprintrc(rc));
/* FUTEX_FD is not implemented since 2.6.26 */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_FD, VAL, NULL,
NULL, VAL3, (rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_FD|FUTEX_PRIVATE_FLAG, %u) = %s\n", uaddr,
VAL_PR, sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_FD, ARG3, "%u");
/* FUTEX_REQUEUE - wake val processes and re-queue rest on uaddr2
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_REQUEUE
* 3. val - how many processes to wake
* 4. val2 - amount of processes to re-queue on uadr2
* 5. uaddr2 - another futex address, to re-queue waiting processes on
* 6. val3 - not used
*/
/* Trying to re-queue some processes but there's nothing to re-queue */
CHECK_FUTEX(uaddr, FUTEX_REQUEUE, VAL, VAL2, uaddr2, VAL3,
(rc == 0));
printf("futex(%p, FUTEX_REQUEUE, %u, %u, %p) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, sprintrc(rc));
/* Trying to re-queue some processes but there's nothing to re-queue */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_REQUEUE, VAL, VAL2,
uaddr2, VAL3, (rc == 0));
printf("futex(%p, FUTEX_REQUEUE_PRIVATE, %u, %u, %p) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_REQUEUE, ARG3 | ARG4 | ARG5, "%u", "%u",
"%#lx");
/* FUTEX_CMP_REQUEUE - wake val processes and re-queue rest on uaddr2
* if uaddr has value val3
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_CMP_REQUEUE
* 3. val - how many processes to wake
* 4. val2 - amount of processes to re-queue on uadr2
* 5. uaddr2 - another futex address, to re-queue waiting processes on
* 6. val3 - expected value stored in uaddr
*/
/* Comparison re-queue with wrong val value */
CHECK_FUTEX(uaddr, FUTEX_CMP_REQUEUE, VAL, VAL2, uaddr2, VAL3,
(rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_CMP_REQUEUE, %u, %u, %p, %u) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, VAL3_PR, sprintrc(rc));
/* Successful comparison re-queue */
CHECK_FUTEX(uaddr, FUTEX_CMP_REQUEUE, VAL, VAL2, uaddr2, *uaddr,
(rc == 0));
printf("futex(%p, FUTEX_CMP_REQUEUE, %u, %u, %p, %u) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, *uaddr, sprintrc(rc));
/* Successful comparison re-queue */
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_CMP_REQUEUE, VAL,
VAL2, uaddr2, *uaddr, (rc == 0));
printf("futex(%p, FUTEX_CMP_REQUEUE_PRIVATE, %u, %u, %p, %u) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, *uaddr, sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_CMP_REQUEUE, ARG3 | ARG4 | ARG5 | ARG6,
"%u", "%u", "%#lx", "%u");
/* FUTEX_WAKE_OP - wake val processes waiting for uaddr, additionally
* wake val2 processes waiting for uaddr2 in case
* operation encoded in val3 (change of value at uaddr2
* and comparison of previous value against provided
* constant) succeedes with value at uaddr2. Operation
* result is written to value of uaddr2 (in any case).
* 1. uaddr - futex address
* 2. op - FUTEX_WAKE_OP
* 3. val - how many processes to wake
* 4. val2 - amount of processes to wake in case operation encoded in
* val3 returns true
* 5. uaddr2 - another futex address, for conditional wake of
* additional processes
* 6. val3 - encoded operation:
* 1. bit 31 - if 1 then value stored in field field 4
* should be interpreted as power of 2.
* 2. 28..30 - arithmetic operation which should be
* applied to previous value stored in
* uaddr2. Values available (from 2005 up to
* 2016): SET. ADD, OR, ANDN, XOR.
* 3. 24..29 - comparison operation which should be
* applied to the old value stored in uaddr2
* (before arithmetic operation is applied).
* Possible values: EQ, NE, LT, LE, GT, GE.
* 4. 12..23 - Second operand for arithmetic operation.
* If bit 31 is set, it is interpreted as
* power of 2.
* 5. 00..11 - Value against which old value stored in
* uaddr2 is compared.
*/
static const struct {
uint32_t val;
const char *str;
/*
* Peculiar semantics:
* * err == 0 and err2 != 0 => expect both either the absence
* of error or presence of err2
* * err != 0 and err2 == 0 => expect err only, no success
* expected.
*/
int err;
int err2;
} wake_ops[] = {
{ 0x00000000, "FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_EQ<<24|0" },
{ 0x00fff000, "FUTEX_OP_SET<<28|0xfff<<12|FUTEX_OP_CMP_EQ<<24|"
"0" },
{ 0x00000fff, "FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_EQ<<24|"
"0xfff" },
{ 0x00ffffff, "FUTEX_OP_SET<<28|0xfff<<12|FUTEX_OP_CMP_EQ<<24|"
"0xfff" },
{ 0x10000000, "FUTEX_OP_ADD<<28|0<<12|FUTEX_OP_CMP_EQ<<24|0" },
{ 0x20000000, "FUTEX_OP_OR<<28|0<<12|FUTEX_OP_CMP_EQ<<24|0" },
{ 0x30000000, "FUTEX_OP_ANDN<<28|0<<12|FUTEX_OP_CMP_EQ<<24|0" },
{ 0x40000000, "FUTEX_OP_XOR<<28|0<<12|FUTEX_OP_CMP_EQ<<24|0" },
{ 0x50000000, "0x5<<28 /* FUTEX_OP_??? */|0<<12|"
"FUTEX_OP_CMP_EQ<<24|0", ENOSYS },
{ 0x70000000, "0x7<<28 /* FUTEX_OP_??? */|0<<12|"
"FUTEX_OP_CMP_EQ<<24|0", ENOSYS },
{ 0x80000000, "FUTEX_OP_OPARG_SHIFT<<28|FUTEX_OP_SET<<28|0<<12|"
"FUTEX_OP_CMP_EQ<<24|0" },
{ 0xa0caffee, "FUTEX_OP_OPARG_SHIFT<<28|FUTEX_OP_OR<<28|"
"0xcaf<<12|FUTEX_OP_CMP_EQ<<24|0xfee", 0, EINVAL },
{ 0x01000000, "FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_NE<<24|0" },
{ 0x01234567, "FUTEX_OP_SET<<28|0x234<<12|FUTEX_OP_CMP_NE<<24|"
"0x567" },
{ 0x02000000, "FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_LT<<24|0" },
{ 0x03000000, "FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_LE<<24|0" },
{ 0x04000000, "FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GT<<24|0" },
{ 0x05000000, "FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GE<<24|0" },
{ 0x06000000, "FUTEX_OP_SET<<28|0<<12|"
"0x6<<24 /* FUTEX_OP_CMP_??? */|0", ENOSYS },
{ 0x07000000, "FUTEX_OP_SET<<28|0<<12|"
"0x7<<24 /* FUTEX_OP_CMP_??? */|0", ENOSYS },
{ 0x08000000, "FUTEX_OP_SET<<28|0<<12|"
"0x8<<24 /* FUTEX_OP_CMP_??? */|0", ENOSYS },
{ 0x0f000000, "FUTEX_OP_SET<<28|0<<12|"
"0xf<<24 /* FUTEX_OP_CMP_??? */|0", ENOSYS },
{ 0xbadfaced, "FUTEX_OP_OPARG_SHIFT<<28|FUTEX_OP_ANDN<<28|"
"0xdfa<<12|0xa<<24 /* FUTEX_OP_CMP_??? */|0xced",
ENOSYS, EINVAL },
{ 0xffffffff, "FUTEX_OP_OPARG_SHIFT<<28|"
"0x7<<28 /* FUTEX_OP_??? */|0xfff<<12|"
"0xf<<24 /* FUTEX_OP_CMP_??? */|0xfff",
ENOSYS, EINVAL },
};
for (i = 0; i < ARRAY_SIZE(wake_ops); i++) {
for (j = 0; j < 2; j++) {
CHECK_FUTEX_ENOSYS(uaddr,
j ? FUTEX_WAKE_OP_PRIVATE : FUTEX_WAKE_OP,
VAL, i, uaddr2, wake_ops[i].val,
/*
* Either one of errs is 0 or rc == 0 is not
* allowed.
*/
((!wake_ops[i].err || !wake_ops[i].err2 ||
(rc != 0)) &&
((!wake_ops[i].err && (rc == 0)) ||
(wake_ops[i].err && (rc == -1) &&
(errno == wake_ops[i].err)) ||
(wake_ops[i].err2 && (rc == -1) &&
(errno == wake_ops[i].err2)))));
printf("futex(%p, FUTEX_WAKE_OP%s, %u, %u, %p, %s)"
" = %s\n", uaddr, j ? "_PRIVATE" : "", VAL_PR,
i, uaddr2, wake_ops[i].str, sprintrc(rc));
}
}
CHECK_INVALID_CLOCKRT(FUTEX_WAKE_OP, ARG3 | ARG4 | ARG5 | ARG6,
"%u", "%u", "%#lx",
/* Decoding of the 0xdeadbee4 value */
"FUTEX_OP_OPARG_SHIFT<<28|0x5<<28 /* FUTEX_OP_??? */|0xadb<<12|"
"0xe<<24 /* FUTEX_OP_CMP_??? */|0xee4");
/* FUTEX_LOCK_PI - slow path for mutex lock with process inheritance
* support. Expect that futex has 0 in unlocked case and
* TID of owning process in locked case. Value can also
* contain FUTEX_WAITERS bit signalling the presence of
* waiters queue.
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_LOCK_PI
* 3. val - not used
* 4. timeout - timeout
* 5. uaddr2 - not used
* 6. val3 - not used
*/
*uaddr = getpid();
CHECK_FUTEX_ENOSYS(uaddr + 1, FUTEX_LOCK_PI, VAL, tmout, uaddr2 + 1,
VAL3, (rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_LOCK_PI, {tv_sec=%lld, tv_nsec=%llu}) = %s\n",
uaddr + 1, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr + 1, FUTEX_PRIVATE_FLAG | FUTEX_LOCK_PI, VAL,
tmout, uaddr2 + 1, VAL3, (rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_LOCK_PI_PRIVATE, {tv_sec=%lld, tv_nsec=%llu})"
" = %s\n",
uaddr + 1, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), sprintrc(rc));
/* NULL is passed by invalid_op() in cases valid timeout address is
* needed */
CHECK_INVALID_CLOCKRT(FUTEX_LOCK_PI, ARG4, "NULL");
/* FUTEX_UNLOCK_PI - slow path for mutex unlock with process inheritance
* support. Expected to be called by process in case
* it failed to execute fast path (it usually means
* that FUTEX_WAITERS flag had been set while the lock
* has been held).
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_UNLOCK_PI
* 3. val - not used
* 4. timeout - not used
* 5. uaddr2 - not used
* 6. val3 - not used
*/
CHECK_FUTEX_ENOSYS(uaddr + 1, FUTEX_UNLOCK_PI, VAL, tmout, uaddr2 + 1,
VAL3, (rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_UNLOCK_PI) = %s\n", uaddr + 1, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr + 1, FUTEX_PRIVATE_FLAG | FUTEX_UNLOCK_PI, VAL,
tmout, uaddr2 + 1, VAL3, (rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_UNLOCK_PI_PRIVATE) = %s\n", uaddr + 1,
sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_UNLOCK_PI, 0);
/* FUTEX_TRYLOCK_PI - slow path for mutex trylock with process
* inheritance support.
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_TRYLOCK_PI
* 3. val - not used
* 4. timeout - not used
* 5. uaddr2 - not used
* 6. val3 - not used
*/
CHECK_FUTEX_ENOSYS(uaddr + 1, FUTEX_TRYLOCK_PI, VAL, tmout, uaddr2 + 1,
VAL3, (rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_TRYLOCK_PI) = %s\n", uaddr + 1, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr + 1, FUTEX_PRIVATE_FLAG | FUTEX_TRYLOCK_PI,
VAL, tmout, uaddr2 + 1, VAL3, (rc == -1) && (errno == EFAULT));
printf("futex(%p, FUTEX_TRYLOCK_PI_PRIVATE) = %s\n", uaddr + 1,
sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_TRYLOCK_PI, 0);
/* FUTEX_WAIT_REQUEUE_PI - kernel-side handling of special case when
* processes should be re-queued on PI-aware
* futexes. This is so special since PI futexes
* utilize rt_mutex and it should be at no time
* left free with a wait queue, so this should
* be performed atomically in-kernel.
* Possible flags: PRIVATE, CLOCKRT
* 1. uaddr - futex address
* 2. op - FUTEX_WAIT_REQUEUE_PI
* 3. val - expected value stored in uaddr
* 4. timeout - timeout
* 5. uaddr2 - (PI-aware) futex address to requeue process on
* 6. val3 - not used (in kernel, it always initialized to
* FUTEX_BITSET_MATCH_ANY and passed to
* futex_wait_requeue_pi())
*/
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_WAIT_REQUEUE_PI, VAL, tmout, uaddr2,
VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_REQUEUE_PI, %u"
", {tv_sec=%lld, tv_nsec=%llu}, %p) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), uaddr2, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_WAIT_REQUEUE_PI,
VAL, tmout, uaddr2, VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_REQUEUE_PI_PRIVATE, %u"
", {tv_sec=%lld, tv_nsec=%llu}, %p) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), uaddr2, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_CLOCK_REALTIME | FUTEX_WAIT_REQUEUE_PI,
VAL, tmout, uaddr2, VAL3, (rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_REQUEUE_PI|FUTEX_CLOCK_REALTIME, %u"
", {tv_sec=%lld, tv_nsec=%llu}, %p) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), uaddr2, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_CLOCK_REALTIME | FUTEX_PRIVATE_FLAG |
FUTEX_WAIT_REQUEUE_PI, VAL, tmout, uaddr2, VAL3,
(rc == -1) && (errno == EAGAIN));
printf("futex(%p, FUTEX_WAIT_REQUEUE_PI_PRIVATE|FUTEX_CLOCK_REALTIME"
", %u, {tv_sec=%lld, tv_nsec=%llu}, %p) = %s\n",
uaddr, VAL_PR, (long long) tmout->tv_sec,
zero_extend_signed_to_ull(tmout->tv_nsec), uaddr2, sprintrc(rc));
/* FUTEX_CMP_REQUEUE_PI - version of FUTEX_CMP_REQUEUE which re-queues
* on PI-aware futex.
* Possible flags: PRIVATE
* 1. uaddr - futex address
* 2. op - FUTEX_CMP_REQUEUE
* 3. val - how many processes to wake
* 4. val2 - amount of processes to re-queue on uadr2
* 5. uaddr2 - (PI-aware) futex address, to re-queue waiting processes
* on
* 6. val3 - expected value stored in uaddr
*/
/* All these should fail with EINVAL since we try to re-queue to non-PI
* futex.
*/
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_CMP_REQUEUE_PI, VAL, VAL2, uaddr2, VAL3,
(rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_CMP_REQUEUE_PI, %u, %u, %p, %u) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, VAL3_PR, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_CMP_REQUEUE_PI, VAL, VAL2, uaddr2,
*uaddr, (rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_CMP_REQUEUE_PI, %u, %u, %p, %u) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, *uaddr, sprintrc(rc));
CHECK_FUTEX_ENOSYS(uaddr, FUTEX_PRIVATE_FLAG | FUTEX_CMP_REQUEUE_PI,
VAL, VAL2, uaddr2, *uaddr, (rc == -1) && (errno == EINVAL));
printf("futex(%p, FUTEX_CMP_REQUEUE_PI_PRIVATE, %u, %u, %p, %u) = %s\n",
uaddr, VAL_PR, VAL2_PR, uaddr2, *uaddr, sprintrc(rc));
CHECK_INVALID_CLOCKRT(FUTEX_CMP_REQUEUE_PI, ARG3 | ARG4 | ARG5 | ARG6,
"%u", "%u", "%#lx", "%u");
/*
* Unknown commands
*/
CHECK_FUTEX(uaddr, 0xd, VAL, tmout + 1, uaddr2 + 1, VAL3,
(rc == -1) && (errno == ENOSYS));
printf("futex(%p, 0xd /* FUTEX_??? */, %u, %p, %p, %#x) = %s\n",
uaddr, VAL_PR, tmout + 1, uaddr2 + 1, VAL3_PR, sprintrc(rc));
CHECK_FUTEX(uaddr, 0xbefeeded, VAL, tmout + 1, uaddr2, VAL3,
(rc == -1) && (errno == ENOSYS));
printf("futex(%p, 0xbefeeded /* FUTEX_??? */, %u, %p, %p, %#x) = %s\n",
uaddr, VAL_PR, tmout + 1, uaddr2, VAL3_PR, sprintrc(rc));
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_futex")
#endif
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