Attachment 870847 Details for Bug 1217225

simple code to reproduce issue.

a.c (text/plain), 1.56 KB, created by WEI GAO on 2023-11-20 02:47:33 UTC

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Creator: WEI GAO

Created: 2023-11-20 02:47:33 UTC

Size: 1.56 KB

patch

obsolete

>/* #include <time.h> */
>#include <unistd.h>
>#include <stdint.h>
>#include <stdio.h>
>#include <errno.h>
>#include <stdlib.h>
>#include <string.h>
>
>
>#define __NR_futex_waitv 449
>#define CLOCK_MONOTONIC 1
>#define FUTEX_32                2
>#define FUTEX_PRIVATE_FLAG      128
>
>/**
> * struct futex_waitv - A waiter for vectorized wait
> * @val:        Expected value at uaddr
> * @uaddr:      User address to wait on
> * @flags:      Flags for this waiter
> * @__reserved: Reserved member to preserve data alignment. Should be 0.
> */
>struct futex_waitv {
>        uint64_t val;
>        uint64_t uaddr;
>        uint32_t flags;
>        uint32_t __reserved;
>};
>
>static uint32_t *futex;
>static struct futex_waitv *waitv;
>
>static void setup(void)
>{
>	futex = malloc(sizeof(uint32_t));
>	waitv = malloc(sizeof(struct futex_waitv));
>	printf("futex is %p\n", futex);
>	*futex = 0;
>}
>
>static void init_timeout(struct timespec *to)
>{
>	to->tv_sec = 1000;
>	to->tv_nsec= 1;
>}
>
>static void init_waitv(void)
>{
>	waitv->uaddr = (uintptr_t)futex;
>	waitv->flags = FUTEX_32 | FUTEX_PRIVATE_FLAG;
>	waitv->val = 0;
>}
>
>static void test_null_address(void)
>{
>	struct timespec to;
>	init_waitv();
>	init_timeout(&to);
>	waitv->uaddr = 0x00000000;
>
>	int ret;
>	ret = syscall(__NR_futex_waitv, waitv, 1, 0, &to, CLOCK_MONOTONIC);
>	printf("!!! ret is %d\n", ret);
>	printf("!!! errno is %d\n", errno);
>	printf("!!! Error message: %s\n", strerror(errno));
>	if (errno == EFAULT) {
>		printf("Case pass\n");
>
>	} else if (errno == EINVAL) {
>		printf("Case failed, expect EFAULT, but encounter EINVAL\n");
>	} 
>}
>
>main() {
>	setup();
>	test_null_address();
>}

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Attachments on bug 1217225: 870847