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/*
* Check decoding of move_pages syscall.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2016-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <asm/unistd.h>
#ifdef __NR_move_pages
# include <errno.h>
# include <stdio.h>
# include <unistd.h>
# define MAX_STRLEN 3
static void
print_page_array(const void **const pages,
const unsigned long count,
const unsigned int offset)
{
if (!count) {
printf("%s", pages ? "[]" : "NULL");
return;
}
if (count <= offset) {
printf("%p", pages);
return;
}
printf("[");
unsigned long i;
for (i = 0; i < count; ++i) {
if (i)
printf(", ");
if (i + offset < count) {
if (i >= MAX_STRLEN) {
printf("...");
break;
}
} else {
printf("... /* %p */", pages + i);
break;
}
const void *const addr = pages[i];
if (addr)
printf("%p", addr);
else
printf("NULL");
}
printf("]");
}
static void
print_node_array(const int *const nodes,
const unsigned long count,
const unsigned int offset)
{
if (!count) {
printf("%s", nodes ? "[]" : "NULL");
return;
}
if (count <= offset) {
printf("%p", nodes);
return;
}
printf("[");
unsigned long i;
for (i = 0; i < count; ++i) {
if (i)
printf(", ");
if (i + offset < count) {
if (i >= MAX_STRLEN) {
printf("...");
break;
}
} else {
printf("... /* %p */", nodes + i);
break;
}
printf("%d", nodes[i]);
}
printf("]");
}
static void
print_status_array(const int *const status, const unsigned long count)
{
if (!count) {
printf("%s", status ? "[]" : "NULL");
return;
}
printf("[");
unsigned long i;
for (i = 0; i < count; ++i) {
if (i)
printf(", ");
if (i >= MAX_STRLEN) {
printf("...");
break;
}
if (status[i] >= 0) {
printf("%d", status[i]);
} else {
errno = -status[i];
printf("-%s", errno2name());
}
}
printf("]");
}
static void
print_stat_pages(const unsigned long pid, const unsigned long count,
const void **const pages, int *const status)
{
const unsigned long flags = (unsigned long) 0xfacefeed00000002ULL;
long rc = syscall(__NR_move_pages,
pid, count, pages, NULL, status, flags);
const char *errstr = sprintrc(rc);
printf("move_pages(%d, %lu, ", (int) pid, count);
print_page_array(pages, count, 0);
printf(", NULL, ");
if (rc) {
if (count)
printf("%p", status);
else
printf("[]");
} else {
print_status_array(status, count);
}
printf(", MPOL_MF_MOVE) = %s\n", errstr);
}
static void
print_move_pages(const unsigned long pid,
unsigned long count,
const unsigned int offset,
const void **const pages,
int *const nodes,
int *const status)
{
const unsigned long flags = (unsigned long) 0xfacefeed00000004ULL;
count += offset;
long rc = syscall(__NR_move_pages,
pid, count, pages, nodes, status, flags);
const char *errstr = sprintrc(rc);
printf("move_pages(%d, %lu, ", (int) pid, count);
print_page_array(pages, count, offset);
printf(", ");
print_node_array(nodes, count, offset);
printf(", ");
if (count)
printf("%p", status);
else
printf("[]");
printf(", MPOL_MF_MOVE_ALL) = %s\n", errstr);
}
int
main(void)
{
const unsigned long pid =
(unsigned long) 0xfacefeed00000000ULL | getpid();
unsigned long count = 1;
const unsigned page_size = get_page_size();
const void *const page = tail_alloc(page_size);
const void *const efault = page + page_size;
TAIL_ALLOC_OBJECT_VAR_PTR(const void *, pages);
TAIL_ALLOC_OBJECT_VAR_PTR(int, nodes);
TAIL_ALLOC_OBJECT_VAR_PTR(int, status);
print_stat_pages(pid, 0, pages, status);
print_move_pages(pid, 0, 0, pages, nodes, status);
print_move_pages(pid, 0, 1, pages + 1, nodes + 1, status + 1);
*pages = page;
print_stat_pages(pid, count, pages, status);
*nodes = 0xdeadbee1;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
++count;
--status;
*(--pages) = efault;
print_stat_pages(pid, count, pages, status);
*(--nodes) = 0xdeadbee2;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
++count;
--status;
*(--pages) = nodes;
print_stat_pages(pid, count, pages, status);
*(--nodes) = 0xdeadbee3;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
++count;
--status;
*(--pages) = status;
print_stat_pages(pid, count, pages, status);
*(--nodes) = 0xdeadbee4;
print_move_pages(pid, count, 0, pages, nodes, status);
print_move_pages(pid, count, 1, pages, nodes, status);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_move_pages")
#endif
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