* Copyright 2024, Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <OS.h>
static int gTestFD = -1;
static const size_t kFileSize = B_PAGE_SIZE * 2 + (B_PAGE_SIZE / 2);
int
map_negative_offset_test()
{
void* ptr = mmap(NULL, B_PAGE_SIZE, PROT_READ, MAP_PRIVATE, gTestFD, -4096);
if (ptr != MAP_FAILED) {
printf("map-negative-offset unexpectedly succeeded!\n");
return -1;
}
return 0;
}
int
resize_mapping_test()
{
void* ptr = mmap(NULL, B_PAGE_SIZE, PROT_READ, MAP_SHARED, gTestFD, 0);
if (ptr == MAP_FAILED)
return -1;
area_id area = area_for(ptr);
if (area < B_OK)
return -1;
if (resize_area(area, B_PAGE_SIZE * 2) == B_OK) {
printf("resize area unexpectedly succeeded!\n");
return -1;
}
if (delete_area(area) != B_OK)
return -1;
return 0;
}
int
map_past_end_test()
{
void* ptr = mmap(NULL, B_PAGE_SIZE, PROT_READ, MAP_PRIVATE, gTestFD, B_PAGE_SIZE * 4);
if (ptr == MAP_FAILED) {
printf("map-past end 1 unexpectedly failed!\n");
return -1;
}
ptr = mmap(NULL, B_PAGE_SIZE, PROT_READ, MAP_SHARED, gTestFD, B_PAGE_SIZE * 4);
if (ptr != MAP_FAILED) {
printf("map-past end 2 unexpectedly succeeded!\n");
return -1;
}
return 0;
}
int
main()
{
const char* fileName = "/tmp/mmap-invalid-test-file";
gTestFD = open(fileName, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (gTestFD < 0) {
fprintf(stderr, "Failed to open \"%s\": %s\n", fileName,
strerror(errno));
return 1;
}
char buffer[2048];
memset(buffer, 0xdd, sizeof(buffer));
size_t written = 0;
while (written < kFileSize) {
if (write(gTestFD, buffer, sizeof(buffer)) != (ssize_t)sizeof(buffer)) {
fprintf(stderr, "Failed to write to file!\n");
return 1;
}
written += sizeof(buffer);
}
int status;
if ((status = map_negative_offset_test()) != 0)
return status;
if ((status = resize_mapping_test()) != 0)
return status;
if ((status = map_past_end_test()) != 0)
return status;
unlink(fileName);
return 0;
}
