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Several tests for buffer allocation

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This commit is contained in:
Nick Mathewson 2014-01-05 22:27:37 -05:00
parent f425cf8338
commit d379fc6e0f
1 changed files with 45 additions and 1 deletions
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46
src/test/test_buffers.c
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@ -451,10 +451,13 @@ test_buffer_ext_or_cmd(void *arg)
static void
test_buffer_allocation_tracking(void *arg)
{
char *junk = tor_malloc(16384);
buf_t *buf1 = NULL, *buf2 = NULL;
int i;
(void)arg;
crypto_rand(junk, 16384);
tt_int_op(buf_get_total_allocation(), ==, 0);
buf1 = buf_new();
@ -462,8 +465,49 @@ test_buffer_allocation_tracking(void *arg)
buf2 = buf_new();
tt_assert(buf2);
//xXXXXXX buf_add
tt_int_op(buf_allocation(buf1), ==, 0);
tt_int_op(buf_get_total_allocation(), ==, 0);
write_to_buf(junk, 4000, buf1);
write_to_buf(junk, 4000, buf1);
write_to_buf(junk, 4000, buf1);
write_to_buf(junk, 4000, buf1);
tt_int_op(buf_allocation(buf1), ==, 16384);
fetch_from_buf(junk, 100, buf1);
tt_int_op(buf_allocation(buf1), ==, 16384); /* still 4 4k chunks */
tt_int_op(buf_get_total_allocation(), ==, 16384);
fetch_from_buf(junk, 4096, buf1); /* drop a 1k chunk... */
tt_int_op(buf_allocation(buf1), ==, 3*4096); /* now 3 4k chunks */
tt_int_op(buf_get_total_allocation(), ==, 16384); /* that chunk went onto
the freelist. */
write_to_buf(junk, 4000, buf2);
tt_int_op(buf_allocation(buf2), ==, 4096); /* another 4k chunk. */
tt_int_op(buf_get_total_allocation(), ==, 16384); /* that chunk came from
the freelist. */
write_to_buf(junk, 4000, buf2);
tt_int_op(buf_allocation(buf2), ==, 8192); /* another 4k chunk. */
tt_int_op(buf_get_total_allocation(), ==, 5*4096); /* that chunk was new. */
/* Make a really huge buffer */
for (i = 0; i < 1000; ++i) {
write_to_buf(junk, 4000, buf2);
}
tt_int_op(buf_allocation(buf2), >=, 4008000);
tt_int_op(buf_get_total_allocation(), >=, 4008000);
buf_free(buf2);
buf2 = NULL;
tt_int_op(buf_get_total_allocation(), <, 4008000);
buf_shrink_freelists(1);
tt_int_op(buf_get_total_allocation(), ==, buf_allocation(buf1));
buf_free(buf1);
buf1 = NULL;
buf_shrink_freelists(1);
tt_int_op(buf_get_total_allocation(), ==, 0);
done: