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test_checksums: test with guard page

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This commit is contained in:
Eric Biggers 2018-12-23 12:34:50 -06:00
parent a5a4822e2a
commit dfd839df4e
1 changed files with 19 additions and 6 deletions
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25
programs/test_checksums.c
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@ -111,17 +111,26 @@ test_adler32(const void *buffer, size_t size, u32 initial_value)
libdeflate_adler32, zlib_adler32, initial_value);
}
static void test_random_buffers(u8 *buffer, size_t limit, u32 num_iter)
static void test_random_buffers(u8 *buffer, u8 *guarded_buf_end,
size_t limit, u32 num_iter)
{
for (u32 i = 0; i < num_iter; i++) {
size_t start = rand() % limit;
size_t len = rand() % (limit - start);
u32 a0 = select_initial_adler();
u32 c0 = select_initial_crc();
for (size_t j = start; j < start + len; j++)
buffer[j] = rand();
test_adler32(&buffer[start], len, select_initial_adler());
test_crc32(&buffer[start], len, select_initial_crc());
/* Test with chosen size and alignment */
test_adler32(&buffer[start], len, a0);
test_crc32(&buffer[start], len, c0);
/* Test with chosen size, with guard page after input buffer */
memcpy(guarded_buf_end - len, &buffer[start], len);
test_adler32(guarded_buf_end - len, len, a0);
test_crc32(guarded_buf_end - len, len, c0);
}
}
@ -129,9 +138,12 @@ int
tmain(int argc, tchar *argv[])
{
u8 *buffer = xmalloc(32768);
u8 *guarded_buf_start, *guarded_buf_end;
program_invocation_name = get_filename(argv[0]);
alloc_guarded_buffer(32768, &guarded_buf_start, &guarded_buf_end);
rng_seed = time(NULL);
srand(rng_seed);
@ -141,9 +153,9 @@ tmain(int argc, tchar *argv[])
test_initial_values(zlib_crc32, 0);
/* Test different buffer sizes and alignments */
test_random_buffers(buffer, 256, 5000);
test_random_buffers(buffer, 1024, 500);
test_random_buffers(buffer, 32768, 50);
test_random_buffers(buffer, guarded_buf_end, 256, 5000);
test_random_buffers(buffer, guarded_buf_end, 1024, 500);
test_random_buffers(buffer, guarded_buf_end, 32768, 50);
/*
* Test Adler-32 overflow cases. For example, given all 0xFF bytes and
@ -170,5 +182,6 @@ tmain(int argc, tchar *argv[])
printf("Adler-32 and CRC-32 checksum tests passed!\n");
free(buffer);
free_guarded_buffer(guarded_buf_start, guarded_buf_end);
return 0;
}