[qemu.git] / tests / test-mmap.c

/*
 * Small test program to verify simulated mmap behaviour.
 *
 * When running qemu-linux-user with the -p flag, you may need to tell
 * this test program about the pagesize because getpagesize() will not reflect
 * the -p choice. Simply pass one argument beeing the pagesize.
 *
 * Copyright (c) 2007 AXIS Communications AB
 * Written by Edgar E. Iglesias.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>

#include <sys/mman.h>

#define D(x)

#define fail_unless(x)                                         \
do                                                             \
{                                                              \
  if (!(x)) {                                                  \
    fprintf (stderr, "FAILED at %s:%d\n", __FILE__, __LINE__); \
    exit (EXIT_FAILURE);                                       \
  }                                                            \
} while (0);

unsigned char *dummybuf;
static unsigned int pagesize;
static unsigned int pagemask;
int test_fd;
size_t test_fsize;

void check_aligned_anonymous_unfixed_mmaps(void)
{
	void *p1;
	void *p2;
	void *p3;
	void *p4;
	void *p5;
	uintptr_t p;
	int i;

	fprintf (stderr, "%s", __func__);
	for (i = 0; i < 0x1fff; i++)
	{
		size_t len;

		len = pagesize + (pagesize * i & 7);
		p1 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
		p2 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
		p3 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
		p4 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
		p5 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

		/* Make sure we get pages aligned with the pagesize. The
		   target expects this.  */
		fail_unless (p1 != MAP_FAILED);
		fail_unless (p2 != MAP_FAILED);
		fail_unless (p3 != MAP_FAILED);
		fail_unless (p4 != MAP_FAILED);
		fail_unless (p5 != MAP_FAILED);
		p = (uintptr_t) p1;
		D(printf ("p=%x\n", p));
		fail_unless ((p & pagemask) == 0);
		p = (uintptr_t) p2;
		fail_unless ((p & pagemask) == 0);
		p = (uintptr_t) p3;
		fail_unless ((p & pagemask) == 0);
		p = (uintptr_t) p4;
		fail_unless ((p & pagemask) == 0);
		p = (uintptr_t) p5;
		fail_unless ((p & pagemask) == 0);

		/* Make sure we can read from the entire area.  */
		memcpy (dummybuf, p1, pagesize);
		memcpy (dummybuf, p2, pagesize);
		memcpy (dummybuf, p3, pagesize);
		memcpy (dummybuf, p4, pagesize);
		memcpy (dummybuf, p5, pagesize);

		munmap (p1, len);
		munmap (p2, len);
		munmap (p3, len);
		munmap (p4, len);
		munmap (p5, len);
	}
	fprintf (stderr, " passed\n");
}

void check_large_anonymous_unfixed_mmap(void)
{
	void *p1;
	uintptr_t p;
	size_t len;

	fprintf (stderr, "%s", __func__);

	len = 0x02000000;
	p1 = mmap(NULL, len, PROT_READ, 
		  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

	/* Make sure we get pages aligned with the pagesize. The
	   target expects this.  */
	fail_unless (p1 != MAP_FAILED);
	p = (uintptr_t) p1;
	fail_unless ((p & pagemask) == 0);
	
	/* Make sure we can read from the entire area.  */
	memcpy (dummybuf, p1, pagesize);
	munmap (p1, len);
	fprintf (stderr, " passed\n");
}

void check_aligned_anonymous_unfixed_colliding_mmaps(void)
{
	char *p1;
	char *p2;
	char *p3;
	uintptr_t p;
	int i;

	fprintf (stderr, "%s", __func__);
	for (i = 0; i < 0x2fff; i++)
	{
		int nlen;
		p1 = mmap(NULL, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
		fail_unless (p1 != MAP_FAILED);
		p = (uintptr_t) p1;
		fail_unless ((p & pagemask) == 0);
		memcpy (dummybuf, p1, pagesize);

		p2 = mmap(NULL, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
		fail_unless (p2 != MAP_FAILED);
		p = (uintptr_t) p2;
		fail_unless ((p & pagemask) == 0);
		memcpy (dummybuf, p2, pagesize);


		munmap (p1, pagesize);
		nlen = pagesize * 8;
		p3 = mmap(NULL, nlen, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

		/* Check if the mmaped areas collide.  */
		if (p3 < p2 
		    && (p3 + nlen) > p2)
			fail_unless (0);

		memcpy (dummybuf, p3, pagesize);

		/* Make sure we get pages aligned with the pagesize. The
		   target expects this.  */
		fail_unless (p3 != MAP_FAILED);
		p = (uintptr_t) p3;
		fail_unless ((p & pagemask) == 0);
		munmap (p2, pagesize);
		munmap (p3, nlen);
	}
	fprintf (stderr, " passed\n");
}

void check_aligned_anonymous_fixed_mmaps(void)
{
	char *addr;
	void *p1;
	uintptr_t p;
	int i;

	/* Find a suitable address to start with.  */
	addr = mmap(NULL, pagesize * 40, PROT_READ | PROT_WRITE, 
		    MAP_PRIVATE | MAP_ANONYMOUS,
		    -1, 0);
	fprintf (stderr, "%s addr=%p", __func__, addr);
	fail_unless (addr != MAP_FAILED);

	for (i = 0; i < 40; i++)
	{
		/* Create submaps within our unfixed map.  */
		p1 = mmap(addr, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
			  -1, 0);
		/* Make sure we get pages aligned with the pagesize. 
		   The target expects this.  */
		p = (uintptr_t) p1;
		fail_unless (p1 == addr);
		fail_unless ((p & pagemask) == 0);		
		memcpy (dummybuf, p1, pagesize);
		munmap (p1, pagesize);
		addr += pagesize;
	}
	fprintf (stderr, " passed\n");
}

void check_aligned_anonymous_fixed_mmaps_collide_with_host(void)
{
	char *addr;
	void *p1;
	uintptr_t p;
	int i;

	/* Find a suitable address to start with.  Right were the x86 hosts
	 stack is.  */
	addr = ((void *)0x80000000);
	fprintf (stderr, "%s addr=%p", __func__, addr);
	fprintf (stderr, "FIXME: QEMU fails to track pages used by the host.");

	for (i = 0; i < 20; i++)
	{
		/* Create submaps within our unfixed map.  */
		p1 = mmap(addr, pagesize, PROT_READ | PROT_WRITE, 
			  MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
			  -1, 0);
		/* Make sure we get pages aligned with the pagesize. 
		   The target expects this.  */
		p = (uintptr_t) p1;
		fail_unless (p1 == addr);
		fail_unless ((p & pagemask) == 0);		
		memcpy (p1, dummybuf, pagesize);
		munmap (p1, pagesize);
		addr += pagesize;
	}
	fprintf (stderr, " passed\n");
}

void check_file_unfixed_mmaps(void)
{
	unsigned int *p1, *p2, *p3;
	uintptr_t p;
	int i;

	fprintf (stderr, "%s", __func__);
	for (i = 0; i < 0x10; i++)
	{
		size_t len;

		len = pagesize;
		p1 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE, 
			  test_fd, 0);
		p2 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE, 
			  test_fd, pagesize);
		p3 = mmap(NULL, len, PROT_READ, 
			  MAP_PRIVATE, 
			  test_fd, pagesize * 2);

		fail_unless (p1 != MAP_FAILED);
		fail_unless (p2 != MAP_FAILED);
		fail_unless (p3 != MAP_FAILED);

		/* Make sure we get pages aligned with the pagesize. The
		   target expects this.  */
		p = (uintptr_t) p1;
		fail_unless ((p & pagemask) == 0);
		p = (uintptr_t) p2;
		fail_unless ((p & pagemask) == 0);
		p = (uintptr_t) p3;
		fail_unless ((p & pagemask) == 0);

		/* Verify that the file maps was made correctly.  */
		D(printf ("p1=%d p2=%d p3=%d\n", *p1, *p2, *p3));
		fail_unless (*p1 == 0);
		fail_unless (*p2 == (pagesize / sizeof *p2));
		fail_unless (*p3 == ((pagesize * 2) / sizeof *p3));

		memcpy (dummybuf, p1, pagesize);
		memcpy (dummybuf, p2, pagesize);
		memcpy (dummybuf, p3, pagesize);
		munmap (p1, len);
		munmap (p2, len);
		munmap (p3, len);
	}
	fprintf (stderr, " passed\n");
}

void check_file_unfixed_eof_mmaps(void)
{
	char *cp;
	unsigned int *p1;
	uintptr_t p;
	int i;

	fprintf (stderr, "%s", __func__);
	for (i = 0; i < 0x10; i++)
	{
		p1 = mmap(NULL, pagesize, PROT_READ, 
			  MAP_PRIVATE, 
			  test_fd, 
			  (test_fsize - sizeof *p1) & ~pagemask);

		fail_unless (p1 != MAP_FAILED);

		/* Make sure we get pages aligned with the pagesize. The
		   target expects this.  */
		p = (uintptr_t) p1;
		fail_unless ((p & pagemask) == 0);
		/* Verify that the file maps was made correctly.  */
		fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1]
			     == ((test_fsize - sizeof *p1) / sizeof *p1));

		/* Verify that the end of page is accessable and zeroed.  */
		cp = (void *) p1;
		fail_unless (cp[pagesize - 4] == 0);
		munmap (p1, pagesize);
	}
	fprintf (stderr, " passed\n");
}

void check_file_fixed_eof_mmaps(void)
{
	char *addr;
	char *cp;
	unsigned int *p1;
	uintptr_t p;
	int i;

	/* Find a suitable address to start with.  */
	addr = mmap(NULL, pagesize * 44, PROT_READ, 
		    MAP_PRIVATE | MAP_ANONYMOUS,
		    -1, 0);

	fprintf (stderr, "%s addr=%p", __func__, (void *)addr);
	fail_unless (addr != MAP_FAILED);

	for (i = 0; i < 0x10; i++)
	{
		/* Create submaps within our unfixed map.  */
		p1 = mmap(addr, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_FIXED, 
			  test_fd, 
			  (test_fsize - sizeof *p1) & ~pagemask);

		fail_unless (p1 != MAP_FAILED);

		/* Make sure we get pages aligned with the pagesize. The
		   target expects this.  */
		p = (uintptr_t) p1;
		fail_unless ((p & pagemask) == 0);

		/* Verify that the file maps was made correctly.  */
		fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1]
			     == ((test_fsize - sizeof *p1) / sizeof *p1));

		/* Verify that the end of page is accessable and zeroed.  */
		cp = (void *)p1;
		fail_unless (cp[pagesize - 4] == 0);
		munmap (p1, pagesize);
		addr += pagesize;
	}
	fprintf (stderr, " passed\n");
}

void check_file_fixed_mmaps(void)
{
	unsigned char *addr;
	unsigned int *p1, *p2, *p3, *p4;
	int i;

	/* Find a suitable address to start with.  */
	addr = mmap(NULL, pagesize * 40 * 4, PROT_READ, 
		    MAP_PRIVATE | MAP_ANONYMOUS,
		    -1, 0);
	fprintf (stderr, "%s addr=%p", __func__, (void *)addr);
	fail_unless (addr != MAP_FAILED);

	for (i = 0; i < 40; i++)
	{
		p1 = mmap(addr, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_FIXED,
			  test_fd, 0);
		p2 = mmap(addr + pagesize, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_FIXED,
			  test_fd, pagesize);
		p3 = mmap(addr + pagesize * 2, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_FIXED,
			  test_fd, pagesize * 2);
		p4 = mmap(addr + pagesize * 3, pagesize, PROT_READ, 
			  MAP_PRIVATE | MAP_FIXED,
			  test_fd, pagesize * 3);

		/* Make sure we get pages aligned with the pagesize. 
		   The target expects this.  */
		fail_unless (p1 == (void *)addr);
		fail_unless (p2 == (void *)addr + pagesize);
		fail_unless (p3 == (void *)addr + pagesize * 2);
		fail_unless (p4 == (void *)addr + pagesize * 3);

		/* Verify that the file maps was made correctly.  */
		fail_unless (*p1 == 0);
		fail_unless (*p2 == (pagesize / sizeof *p2));
		fail_unless (*p3 == ((pagesize * 2) / sizeof *p3));
		fail_unless (*p4 == ((pagesize * 3) / sizeof *p4));

		memcpy (dummybuf, p1, pagesize);
		memcpy (dummybuf, p2, pagesize);
		memcpy (dummybuf, p3, pagesize);
		memcpy (dummybuf, p4, pagesize);

		munmap (p1, pagesize);
		munmap (p2, pagesize);
		munmap (p3, pagesize);
		munmap (p4, pagesize);
		addr += pagesize * 4;
	}
	fprintf (stderr, " passed\n");
}

int main(int argc, char **argv)
{
	char tempname[] = "/tmp/.cmmapXXXXXX";
	unsigned int i;

	/* Trust the first argument, otherwise probe the system for our
	   pagesize.  */
	if (argc > 1)
		pagesize = strtoul(argv[1], NULL, 0);
	else
		pagesize = sysconf(_SC_PAGESIZE);

	/* Assume pagesize is a power of two.  */
	pagemask = pagesize - 1;
	dummybuf = malloc (pagesize);
	printf ("pagesize=%u pagemask=%x\n", pagesize, pagemask);

	test_fd = mkstemp(tempname);
	unlink(tempname);

	/* Fill the file with int's counting from zero and up.  */
	for (i = 0; i < (pagesize * 4) / sizeof i; i++)
		write (test_fd, &i, sizeof i);
	/* Append a few extra writes to make the file end at non 
	   page boundary.  */
	write (test_fd, &i, sizeof i); i++;
	write (test_fd, &i, sizeof i); i++;
	write (test_fd, &i, sizeof i); i++;

	test_fsize = lseek(test_fd, 0, SEEK_CUR);

	/* Run the tests.  */
	check_aligned_anonymous_unfixed_mmaps();
	check_aligned_anonymous_unfixed_colliding_mmaps();
	check_aligned_anonymous_fixed_mmaps();
	check_file_unfixed_mmaps();
	check_file_fixed_mmaps();
	check_file_fixed_eof_mmaps();
	check_file_unfixed_eof_mmaps();

	/* Fails at the moment.  */
	/* check_aligned_anonymous_fixed_mmaps_collide_with_host(); */

	return EXIT_SUCCESS;
}
Commit	Line	Data
e1ffb0f1 EI	1	/*
	2	* Small test program to verify simulated mmap behaviour.
	3	*
	4	* When running qemu-linux-user with the -p flag, you may need to tell
	5	* this test program about the pagesize because getpagesize() will not reflect
	6	* the -p choice. Simply pass one argument beeing the pagesize.
	7	*
	8	* Copyright (c) 2007 AXIS Communications AB
	9	* Written by Edgar E. Iglesias.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
8167ee88	22	* along with this program; if not, see <http://www.gnu.org/licenses/>.
e1ffb0f1 EI	23	*/
	24
	25	#include <stdio.h>
	26	#include <stdlib.h>
	27	#include <stdint.h>
	28	#include <string.h>
	29	#include <unistd.h>
	30
	31	#include <sys/mman.h>
	32
	33	#define D(x)
	34
	35	#define fail_unless(x) \
	36	do \
	37	{ \
	38	if (!(x)) { \
	39	fprintf (stderr, "FAILED at %s:%d\n", __FILE__, __LINE__); \
	40	exit (EXIT_FAILURE); \
	41	} \
	42	} while (0);
	43
	44	unsigned char *dummybuf;
	45	static unsigned int pagesize;
	46	static unsigned int pagemask;
	47	int test_fd;
	48	size_t test_fsize;
	49
	50	void check_aligned_anonymous_unfixed_mmaps(void)
	51	{
	52	void *p1;
	53	void *p2;
	54	void *p3;
	55	void *p4;
	56	void *p5;
	57	uintptr_t p;
	58	int i;
	59
	60	fprintf (stderr, "%s", __func__);
	61	for (i = 0; i < 0x1fff; i++)
	62	{
	63	size_t len;
	64
	65	len = pagesize + (pagesize * i & 7);
	66	p1 = mmap(NULL, len, PROT_READ,
	67	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	68	p2 = mmap(NULL, len, PROT_READ,
	69	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	70	p3 = mmap(NULL, len, PROT_READ,
	71	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	72	p4 = mmap(NULL, len, PROT_READ,
	73	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	74	p5 = mmap(NULL, len, PROT_READ,
	75	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
	76
	77	/* Make sure we get pages aligned with the pagesize. The
	78	target expects this. */
	79	fail_unless (p1 != MAP_FAILED);
	80	fail_unless (p2 != MAP_FAILED);
	81	fail_unless (p3 != MAP_FAILED);
	82	fail_unless (p4 != MAP_FAILED);
	83	fail_unless (p5 != MAP_FAILED);
	84	p = (uintptr_t) p1;
	85	D(printf ("p=%x\n", p));
	86	fail_unless ((p & pagemask) == 0);
87	p = (uintptr_t) p2;
88	fail_unless ((p & pagemask) == 0);
89	p = (uintptr_t) p3;
90	fail_unless ((p & pagemask) == 0);
91	p = (uintptr_t) p4;
92	fail_unless ((p & pagemask) == 0);
93	p = (uintptr_t) p5;
94	fail_unless ((p & pagemask) == 0);
95
96	/* Make sure we can read from the entire area. */
97	memcpy (dummybuf, p1, pagesize);
98	memcpy (dummybuf, p2, pagesize);
99	memcpy (dummybuf, p3, pagesize);
100	memcpy (dummybuf, p4, pagesize);
101	memcpy (dummybuf, p5, pagesize);
102
103	munmap (p1, len);
104	munmap (p2, len);
105	munmap (p3, len);
106	munmap (p4, len);
107	munmap (p5, len);
108	}
109	fprintf (stderr, " passed\n");
110	}
111
112	void check_large_anonymous_unfixed_mmap(void)
113	{
114	void *p1;
115	uintptr_t p;
116	size_t len;
117
118	fprintf (stderr, "%s", __func__);
119
120	len = 0x02000000;
121	p1 = mmap(NULL, len, PROT_READ,
122	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
123
124	/* Make sure we get pages aligned with the pagesize. The
125	target expects this. */
126	fail_unless (p1 != MAP_FAILED);
127	p = (uintptr_t) p1;
128	fail_unless ((p & pagemask) == 0);
129
130	/* Make sure we can read from the entire area. */
131	memcpy (dummybuf, p1, pagesize);
132	munmap (p1, len);
133	fprintf (stderr, " passed\n");
134	}
135
136	void check_aligned_anonymous_unfixed_colliding_mmaps(void)
137	{
138	char *p1;
139	char *p2;
140	char *p3;
141	uintptr_t p;
142	int i;
143
144	fprintf (stderr, "%s", __func__);
145	for (i = 0; i < 0x2fff; i++)
146	{
147	int nlen;
148	p1 = mmap(NULL, pagesize, PROT_READ,
149	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
150	fail_unless (p1 != MAP_FAILED);
151	p = (uintptr_t) p1;
152	fail_unless ((p & pagemask) == 0);
153	memcpy (dummybuf, p1, pagesize);
154
155	p2 = mmap(NULL, pagesize, PROT_READ,
156	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
157	fail_unless (p2 != MAP_FAILED);
158	p = (uintptr_t) p2;
159	fail_unless ((p & pagemask) == 0);
160	memcpy (dummybuf, p2, pagesize);
161
162
163	munmap (p1, pagesize);
164	nlen = pagesize * 8;
165	p3 = mmap(NULL, nlen, PROT_READ,
166	MAP_PRIVATE \| MAP_ANONYMOUS, -1, 0);
167
168	/* Check if the mmaped areas collide. */
169	if (p3 < p2
170	&& (p3 + nlen) > p2)
171	fail_unless (0);
172
173	memcpy (dummybuf, p3, pagesize);
174
175	/* Make sure we get pages aligned with the pagesize. The
176	target expects this. */
177	fail_unless (p3 != MAP_FAILED);
178	p = (uintptr_t) p3;
179	fail_unless ((p & pagemask) == 0);
180	munmap (p2, pagesize);
181	munmap (p3, nlen);
182	}
183	fprintf (stderr, " passed\n");
184	}
185
186	void check_aligned_anonymous_fixed_mmaps(void)
187	{
188	char *addr;
189	void *p1;
190	uintptr_t p;
191	int i;
192
193	/* Find a suitable address to start with. */
194	addr = mmap(NULL, pagesize * 40, PROT_READ \| PROT_WRITE,
195	MAP_PRIVATE \| MAP_ANONYMOUS,
196	-1, 0);
197	fprintf (stderr, "%s addr=%p", __func__, addr);
198	fail_unless (addr != MAP_FAILED);
199
200	for (i = 0; i < 40; i++)
201	{
202	/* Create submaps within our unfixed map. */
203	p1 = mmap(addr, pagesize, PROT_READ,
204	MAP_PRIVATE \| MAP_ANONYMOUS \| MAP_FIXED,
205	-1, 0);
206	/* Make sure we get pages aligned with the pagesize.
207	The target expects this. */
208	p = (uintptr_t) p1;
209	fail_unless (p1 == addr);
210	fail_unless ((p & pagemask) == 0);
211	memcpy (dummybuf, p1, pagesize);
212	munmap (p1, pagesize);
213	addr += pagesize;
214	}
215	fprintf (stderr, " passed\n");
216	}
217
218	void check_aligned_anonymous_fixed_mmaps_collide_with_host(void)
219	{
220	char *addr;
221	void *p1;
222	uintptr_t p;
223	int i;
224
225	/* Find a suitable address to start with. Right were the x86 hosts
226	stack is. */
227	addr = ((void *)0x80000000);
228	fprintf (stderr, "%s addr=%p", __func__, addr);
229	fprintf (stderr, "FIXME: QEMU fails to track pages used by the host.");
230
231	for (i = 0; i < 20; i++)
232	{
233	/* Create submaps within our unfixed map. */
234	p1 = mmap(addr, pagesize, PROT_READ \| PROT_WRITE,
235	MAP_PRIVATE \| MAP_ANONYMOUS \| MAP_FIXED,
236	-1, 0);
237	/* Make sure we get pages aligned with the pagesize.
238	The target expects this. */
239	p = (uintptr_t) p1;
240	fail_unless (p1 == addr);
241	fail_unless ((p & pagemask) == 0);
242	memcpy (p1, dummybuf, pagesize);
243	munmap (p1, pagesize);
244	addr += pagesize;
245	}
246	fprintf (stderr, " passed\n");
247	}
248
249	void check_file_unfixed_mmaps(void)
250	{
251	unsigned int p1, p2, *p3;
252	uintptr_t p;
253	int i;
254
255	fprintf (stderr, "%s", __func__);
256	for (i = 0; i < 0x10; i++)
257	{
258	size_t len;
259
260	len = pagesize;
261	p1 = mmap(NULL, len, PROT_READ,
262	MAP_PRIVATE,
263	test_fd, 0);
264	p2 = mmap(NULL, len, PROT_READ,
265	MAP_PRIVATE,
266	test_fd, pagesize);
267	p3 = mmap(NULL, len, PROT_READ,
268	MAP_PRIVATE,
269	test_fd, pagesize * 2);
270
271	fail_unless (p1 != MAP_FAILED);
272	fail_unless (p2 != MAP_FAILED);
273	fail_unless (p3 != MAP_FAILED);
274
275	/* Make sure we get pages aligned with the pagesize. The
276	target expects this. */
277	p = (uintptr_t) p1;
278	fail_unless ((p & pagemask) == 0);
279	p = (uintptr_t) p2;
280	fail_unless ((p & pagemask) == 0);
281	p = (uintptr_t) p3;
282	fail_unless ((p & pagemask) == 0);
283
284	/* Verify that the file maps was made correctly. */
285	D(printf ("p1=%d p2=%d p3=%d\n", p1, p2, *p3));
286	fail_unless (*p1 == 0);
287	fail_unless (p2 == (pagesize / sizeof p2));
288	fail_unless (p3 == ((pagesize 2) / sizeof *p3));
289
290	memcpy (dummybuf, p1, pagesize);
291	memcpy (dummybuf, p2, pagesize);
292	memcpy (dummybuf, p3, pagesize);
293	munmap (p1, len);
294	munmap (p2, len);
295	munmap (p3, len);
296	}
297	fprintf (stderr, " passed\n");
298	}
299
300	void check_file_unfixed_eof_mmaps(void)
301	{
302	char *cp;
303	unsigned int *p1;
304	uintptr_t p;
305	int i;
306
307	fprintf (stderr, "%s", __func__);
308	for (i = 0; i < 0x10; i++)
309	{
310	p1 = mmap(NULL, pagesize, PROT_READ,
311	MAP_PRIVATE,
312	test_fd,
313	(test_fsize - sizeof *p1) & ~pagemask);
314
315	fail_unless (p1 != MAP_FAILED);
316
317	/* Make sure we get pages aligned with the pagesize. The
318	target expects this. */
319	p = (uintptr_t) p1;
320	fail_unless ((p & pagemask) == 0);
321	/* Verify that the file maps was made correctly. */
322	fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1]
323	== ((test_fsize - sizeof p1) / sizeof p1));
324
325	/* Verify that the end of page is accessable and zeroed. */
326	cp = (void *) p1;
327	fail_unless (cp[pagesize - 4] == 0);
328	munmap (p1, pagesize);
329	}
330	fprintf (stderr, " passed\n");
331	}
332
333	void check_file_fixed_eof_mmaps(void)
334	{
335	char *addr;
336	char *cp;
337	unsigned int *p1;
338	uintptr_t p;
339	int i;
340
341	/* Find a suitable address to start with. */
342	addr = mmap(NULL, pagesize * 44, PROT_READ,
343	MAP_PRIVATE \| MAP_ANONYMOUS,
344	-1, 0);
345
346	fprintf (stderr, "%s addr=%p", __func__, (void *)addr);
347	fail_unless (addr != MAP_FAILED);
348
349	for (i = 0; i < 0x10; i++)
350	{
351	/* Create submaps within our unfixed map. */
352	p1 = mmap(addr, pagesize, PROT_READ,
353	MAP_PRIVATE \| MAP_FIXED,
354	test_fd,
355	(test_fsize - sizeof *p1) & ~pagemask);
356
357	fail_unless (p1 != MAP_FAILED);
358
359	/* Make sure we get pages aligned with the pagesize. The
360	target expects this. */
361	p = (uintptr_t) p1;
362	fail_unless ((p & pagemask) == 0);
363
364	/* Verify that the file maps was made correctly. */
365	fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1]
366	== ((test_fsize - sizeof p1) / sizeof p1));
367
368	/* Verify that the end of page is accessable and zeroed. */
369	cp = (void *)p1;
370	fail_unless (cp[pagesize - 4] == 0);
371	munmap (p1, pagesize);
372	addr += pagesize;
373	}
374	fprintf (stderr, " passed\n");
375	}
376
377	void check_file_fixed_mmaps(void)
378	{
7dd7c987	379	unsigned char *addr;
e1ffb0f1 EI	380	unsigned int p1, p2, p3, p4;
	381	int i;
	382
	383	/* Find a suitable address to start with. */
7dd7c987	384	addr = mmap(NULL, pagesize * 40 * 4, PROT_READ,
e1ffb0f1 EI	385	MAP_PRIVATE \| MAP_ANONYMOUS,
	386	-1, 0);
	387	fprintf (stderr, "%s addr=%p", __func__, (void *)addr);
	388	fail_unless (addr != MAP_FAILED);
	389
	390	for (i = 0; i < 40; i++)
	391	{
	392	p1 = mmap(addr, pagesize, PROT_READ,
	393	MAP_PRIVATE \| MAP_FIXED,
	394	test_fd, 0);
	395	p2 = mmap(addr + pagesize, pagesize, PROT_READ,
	396	MAP_PRIVATE \| MAP_FIXED,
	397	test_fd, pagesize);
	398	p3 = mmap(addr + pagesize * 2, pagesize, PROT_READ,
	399	MAP_PRIVATE \| MAP_FIXED,
	400	test_fd, pagesize * 2);
	401	p4 = mmap(addr + pagesize * 3, pagesize, PROT_READ,
	402	MAP_PRIVATE \| MAP_FIXED,
	403	test_fd, pagesize * 3);
	404
	405	/* Make sure we get pages aligned with the pagesize.
	406	The target expects this. */
7dd7c987 EI	407	fail_unless (p1 == (void *)addr);
	408	fail_unless (p2 == (void *)addr + pagesize);
	409	fail_unless (p3 == (void )addr + pagesize 2);
	410	fail_unless (p4 == (void )addr + pagesize 3);
e1ffb0f1 EI	411
	412	/* Verify that the file maps was made correctly. */
	413	fail_unless (*p1 == 0);
	414	fail_unless (p2 == (pagesize / sizeof p2));
	415	fail_unless (p3 == ((pagesize 2) / sizeof *p3));
	416	fail_unless (p4 == ((pagesize 3) / sizeof *p4));
	417
	418	memcpy (dummybuf, p1, pagesize);
	419	memcpy (dummybuf, p2, pagesize);
	420	memcpy (dummybuf, p3, pagesize);
	421	memcpy (dummybuf, p4, pagesize);
	422
	423	munmap (p1, pagesize);
	424	munmap (p2, pagesize);
	425	munmap (p3, pagesize);
	426	munmap (p4, pagesize);
7dd7c987	427	addr += pagesize * 4;
e1ffb0f1 EI	428	}
	429	fprintf (stderr, " passed\n");
	430	}
	431
	432	int main(int argc, char **argv)
	433	{
	434	char tempname[] = "/tmp/.cmmapXXXXXX";
	435	unsigned int i;
	436
	437	/* Trust the first argument, otherwise probe the system for our
	438	pagesize. */
	439	if (argc > 1)
	440	pagesize = strtoul(argv[1], NULL, 0);
	441	else
	442	pagesize = sysconf(_SC_PAGESIZE);
	443
	444	/* Assume pagesize is a power of two. */
	445	pagemask = pagesize - 1;
	446	dummybuf = malloc (pagesize);
	447	printf ("pagesize=%u pagemask=%x\n", pagesize, pagemask);
	448
	449	test_fd = mkstemp(tempname);
	450	unlink(tempname);
	451
	452	/* Fill the file with int's counting from zero and up. */
	453	for (i = 0; i < (pagesize * 4) / sizeof i; i++)
	454	write (test_fd, &i, sizeof i);
	455	/* Append a few extra writes to make the file end at non
	456	page boundary. */
	457	write (test_fd, &i, sizeof i); i++;
	458	write (test_fd, &i, sizeof i); i++;
	459	write (test_fd, &i, sizeof i); i++;
	460
	461	test_fsize = lseek(test_fd, 0, SEEK_CUR);
	462
	463	/* Run the tests. */
	464	check_aligned_anonymous_unfixed_mmaps();
	465	check_aligned_anonymous_unfixed_colliding_mmaps();
	466	check_aligned_anonymous_fixed_mmaps();
	467	check_file_unfixed_mmaps();
	468	check_file_fixed_mmaps();
	469	check_file_fixed_eof_mmaps();
	470	check_file_unfixed_eof_mmaps();
	471
	472	/* Fails at the moment. */
	473	/* check_aligned_anonymous_fixed_mmaps_collide_with_host(); */
	474
	475	return EXIT_SUCCESS;
	476	}