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selftests: futex: Test sys_futex_waitv() wouldblock 

Test if futex_waitv() returns -EWOULDBLOCK correctly when the expected
value is different from the actual value for a waiter.

Signed-off-by: André Almeida <andrealmeid@collabora.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210923171111.300673-22-andrealmeid@collabora.com
This commit is contained in:
André Almeida 2021-09-23 14:11:10 -03:00 committed by Peter Zijlstra
parent 02e56ccbae
commit 9d57f7c797
1 changed files with 37 additions and 4 deletions
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41
tools/testing/selftests/futex/functional/futex_wait_wouldblock.c
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@ -22,6 +22,7 @@
#include <string.h>
#include <time.h>
#include "futextest.h"
#include "futex2test.h"
#include "logging.h"
#define TEST_NAME "futex-wait-wouldblock"
@ -42,6 +43,12 @@ int main(int argc, char *argv[])
futex_t f1 = FUTEX_INITIALIZER;
int res, ret = RET_PASS;
int c;
struct futex_waitv waitv = {
.uaddr = (uintptr_t)&f1,
.val = f1+1,
.flags = FUTEX_32,
.__reserved = 0
};
while ((c = getopt(argc, argv, "cht:v:")) != -1) {
switch (c) {
@ -61,18 +68,44 @@ int main(int argc, char *argv[])
}
ksft_print_header();
ksft_set_plan(1);
ksft_set_plan(2);
ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",
basename(argv[0]));
info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
if (!res || errno != EWOULDBLOCK) {
fail("futex_wait returned: %d %s\n",
res ? errno : res, res ? strerror(errno) : "");
ksft_test_result_fail("futex_wait returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_wait\n");
}
print_result(TEST_NAME, ret);
if (clock_gettime(CLOCK_MONOTONIC, &to)) {
error("clock_gettime failed\n", errno);
return errno;
}
to.tv_nsec += timeout_ns;
if (to.tv_nsec >= 1000000000) {
to.tv_sec++;
to.tv_nsec -= 1000000000;
}
info("Calling futex_waitv on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC);
if (!res || errno != EWOULDBLOCK) {
ksft_test_result_pass("futex_waitv returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv\n");
}
ksft_print_cnts();
return ret;
}