1#include <malloc.h>
2#include <string.h>
3#include <stdlib.h>
4#include <stdbool.h>
5
6#include "utils.h"
7
8#define MAX_LEN 8192
9#define MAX_OFFSET 16
10#define MIN_REDZONE 128
11#define BUFLEN (MAX_LEN+MAX_OFFSET+2*MIN_REDZONE)
12#define POISON 0xa5
13
14unsigned long COPY_LOOP(void *to, const void *from, unsigned long size);
15
16static void do_one(char *src, char *dst, unsigned long src_off,
17		   unsigned long dst_off, unsigned long len, void *redzone,
18		   void *fill)
19{
20	char *srcp, *dstp;
21	unsigned long ret;
22	unsigned long i;
23
24	srcp = src + MIN_REDZONE + src_off;
25	dstp = dst + MIN_REDZONE + dst_off;
26
27	memset(src, POISON, BUFLEN);
28	memset(dst, POISON, BUFLEN);
29	memcpy(srcp, fill, len);
30
31	ret = COPY_LOOP(dstp, srcp, len);
32	if (ret && ret != (unsigned long)dstp) {
33		printf("(%p,%p,%ld) returned %ld\n", dstp, srcp, len, ret);
34		abort();
35	}
36
37	if (memcmp(dstp, srcp, len)) {
38		printf("(%p,%p,%ld) miscompare\n", dstp, srcp, len);
39		printf("src: ");
40		for (i = 0; i < len; i++)
41			printf("%02x ", srcp[i]);
42		printf("\ndst: ");
43		for (i = 0; i < len; i++)
44			printf("%02x ", dstp[i]);
45		printf("\n");
46		abort();
47	}
48
49	if (memcmp(dst, redzone, dstp - dst)) {
50		printf("(%p,%p,%ld) redzone before corrupted\n",
51		       dstp, srcp, len);
52		abort();
53	}
54
55	if (memcmp(dstp+len, redzone, dst+BUFLEN-(dstp+len))) {
56		printf("(%p,%p,%ld) redzone after corrupted\n",
57		       dstp, srcp, len);
58		abort();
59	}
60}
61
62int test_copy_loop(void)
63{
64	char *src, *dst, *redzone, *fill;
65	unsigned long len, src_off, dst_off;
66	unsigned long i;
67
68	src = memalign(BUFLEN, BUFLEN);
69	dst = memalign(BUFLEN, BUFLEN);
70	redzone = malloc(BUFLEN);
71	fill = malloc(BUFLEN);
72
73	if (!src || !dst || !redzone || !fill) {
74		fprintf(stderr, "malloc failed\n");
75		exit(1);
76	}
77
78	memset(redzone, POISON, BUFLEN);
79
80	/* Fill with sequential bytes */
81	for (i = 0; i < BUFLEN; i++)
82		fill[i] = i & 0xff;
83
84	for (len = 1; len < MAX_LEN; len++) {
85		for (src_off = 0; src_off < MAX_OFFSET; src_off++) {
86			for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {
87				do_one(src, dst, src_off, dst_off, len,
88				       redzone, fill);
89			}
90		}
91	}
92
93	return 0;
94}
95
96int main(void)
97{
98	return test_harness(test_copy_loop, str(COPY_LOOP));
99}
100