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-rw-r--r--src/test/test_buffers.c265
1 files changed, 262 insertions, 3 deletions
diff --git a/src/test/test_buffers.c b/src/test/test_buffers.c
index a009faa0b..a410770b0 100644
--- a/src/test/test_buffers.c
+++ b/src/test/test_buffers.c
@@ -193,7 +193,120 @@ test_buffers_basic(void *arg)
buf_free(buf);
if (buf2)
buf_free(buf2);
+ buf_shrink_freelists(1);
}
+
+static void
+test_buffer_pullup(void *arg)
+{
+ buf_t *buf;
+ char *stuff, *tmp;
+ const char *cp;
+ size_t sz;
+ (void)arg;
+ stuff = tor_malloc(16384);
+ tmp = tor_malloc(16384);
+
+ /* Note: this test doesn't check the nulterminate argument to buf_pullup,
+ since nothing actually uses it. We should remove it some time. */
+
+ buf = buf_new_with_capacity(3000); /* rounds up to next power of 2. */
+
+ tt_assert(buf);
+ tt_int_op(buf_get_default_chunk_size(buf), ==, 4096);
+
+ tt_int_op(buf_get_total_allocation(), ==, 0);
+
+ /* There are a bunch of cases for pullup. One is the trivial case. Let's
+ mess around with an empty buffer. */
+ buf_pullup(buf, 16, 1);
+ buf_get_first_chunk_data(buf, &cp, &sz);
+ tt_ptr_op(cp, ==, NULL);
+ tt_ptr_op(sz, ==, 0);
+
+ /* Let's make sure nothing got allocated */
+ tt_int_op(buf_get_total_allocation(), ==, 0);
+
+ /* Case 1: everything puts into the first chunk with some moving. */
+
+ /* Let's add some data. */
+ crypto_rand(stuff, 16384);
+ write_to_buf(stuff, 3000, buf);
+ write_to_buf(stuff+3000, 3000, buf);
+ buf_get_first_chunk_data(buf, &cp, &sz);
+ tt_ptr_op(cp, !=, NULL);
+ tt_int_op(sz, <=, 4096);
+
+ /* Make room for 3000 bytes in the first chunk, so that the pullup-move code
+ * can get tested. */
+ tt_int_op(fetch_from_buf(tmp, 3000, buf), ==, 3000);
+ test_memeq(tmp, stuff, 3000);
+ buf_pullup(buf, 2048, 0);
+ assert_buf_ok(buf);
+ buf_get_first_chunk_data(buf, &cp, &sz);
+ tt_ptr_op(cp, !=, NULL);
+ tt_int_op(sz, >=, 2048);
+ test_memeq(cp, stuff+3000, 2048);
+ tt_int_op(3000, ==, buf_datalen(buf));
+ tt_int_op(fetch_from_buf(tmp, 3000, buf), ==, 0);
+ test_memeq(tmp, stuff+3000, 2048);
+
+ buf_free(buf);
+
+ /* Now try the large-chunk case. */
+ buf = buf_new_with_capacity(3000); /* rounds up to next power of 2. */
+ write_to_buf(stuff, 4000, buf);
+ write_to_buf(stuff+4000, 4000, buf);
+ write_to_buf(stuff+8000, 4000, buf);
+ write_to_buf(stuff+12000, 4000, buf);
+ tt_int_op(buf_datalen(buf), ==, 16000);
+ buf_get_first_chunk_data(buf, &cp, &sz);
+ tt_ptr_op(cp, !=, NULL);
+ tt_int_op(sz, <=, 4096);
+
+ buf_pullup(buf, 12500, 0);
+ assert_buf_ok(buf);
+ buf_get_first_chunk_data(buf, &cp, &sz);
+ tt_ptr_op(cp, !=, NULL);
+ tt_int_op(sz, >=, 12500);
+ test_memeq(cp, stuff, 12500);
+ tt_int_op(buf_datalen(buf), ==, 16000);
+
+ fetch_from_buf(tmp, 12400, buf);
+ test_memeq(tmp, stuff, 12400);
+ tt_int_op(buf_datalen(buf), ==, 3600);
+ fetch_from_buf(tmp, 3500, buf);
+ test_memeq(tmp, stuff+12400, 3500);
+ fetch_from_buf(tmp, 100, buf);
+ test_memeq(tmp, stuff+15900, 10);
+
+ buf_free(buf);
+
+ /* Make sure that the pull-up-whole-buffer case works */
+ buf = buf_new_with_capacity(3000); /* rounds up to next power of 2. */
+ write_to_buf(stuff, 4000, buf);
+ write_to_buf(stuff+4000, 4000, buf);
+ fetch_from_buf(tmp, 100, buf); /* dump 100 bytes from first chunk */
+ buf_pullup(buf, 16000, 0); /* Way too much. */
+ assert_buf_ok(buf);
+ buf_get_first_chunk_data(buf, &cp, &sz);
+ tt_ptr_op(cp, !=, NULL);
+ tt_int_op(sz, ==, 7900);
+ test_memeq(cp, stuff+100, 7900);
+
+ buf_free(buf);
+ buf = NULL;
+
+ buf_shrink_freelists(1);
+
+ tt_int_op(buf_get_total_allocation(), ==, 0);
+ done:
+ buf_free(buf);
+ buf_shrink_freelists(1);
+ tor_free(stuff);
+ tor_free(tmp);
+}
+
static void
test_buffer_copy(void *arg)
{
@@ -257,6 +370,7 @@ test_buffer_copy(void *arg)
generic_buffer_free(buf);
if (buf2)
generic_buffer_free(buf2);
+ buf_shrink_freelists(1);
}
static void
@@ -331,12 +445,157 @@ test_buffer_ext_or_cmd(void *arg)
ext_or_cmd_free(cmd);
generic_buffer_free(buf);
tor_free(tmp);
+ buf_shrink_freelists(1);
+}
+
+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();
+ tt_assert(buf1);
+ buf2 = buf_new();
+ tt_assert(buf2);
+
+ 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:
+ buf_free(buf1);
+ buf_free(buf2);
+ buf_shrink_freelists(1);
+}
+
+static void
+test_buffer_time_tracking(void *arg)
+{
+ buf_t *buf=NULL, *buf2=NULL;
+ struct timeval tv0;
+ const time_t START = 1389288246;
+ const uint32_t START_MSEC = (uint32_t) ((uint64_t)START * 1000);
+ int i;
+ char tmp[4096];
+ (void)arg;
+
+ crypto_rand(tmp, sizeof(tmp));
+
+ tv0.tv_sec = START;
+ tv0.tv_usec = 0;
+
+ buf = buf_new_with_capacity(3000); /* rounds up to next power of 2. */
+ tt_assert(buf);
+
+ /* Empty buffer means the timestamp is 0. */
+ tt_int_op(0, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC));
+ tt_int_op(0, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+1000));
+
+ tor_gettimeofday_cache_set(&tv0);
+ write_to_buf("ABCDEFG", 7, buf);
+ tt_int_op(1000, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+1000));
+
+ buf2 = buf_copy(buf);
+ tt_assert(buf2);
+ tt_int_op(1234, ==, buf_get_oldest_chunk_timestamp(buf2, START_MSEC+1234));
+
+ /* Now add more bytes; enough to overflow the first chunk. */
+ tv0.tv_usec += 123 * 1000;
+ tor_gettimeofday_cache_set(&tv0);
+ for (i = 0; i < 600; ++i)
+ write_to_buf("ABCDEFG", 7, buf);
+ tt_int_op(4207, ==, buf_datalen(buf));
+
+ /* The oldest bytes are still in the front. */
+ tt_int_op(2000, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+2000));
+
+ /* Once those bytes are dropped, the chunk is still on the first
+ * timestamp. */
+ fetch_from_buf(tmp, 100, buf);
+ tt_int_op(2000, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+2000));
+
+ /* But once we discard the whole first chunk, we get the data in the second
+ * chunk. */
+ fetch_from_buf(tmp, 4000, buf);
+ tt_int_op(107, ==, buf_datalen(buf));
+ tt_int_op(2000, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+2123));
+
+ /* This time we'll be grabbing a chunk from the freelist, and making sure
+ its time gets updated */
+ tv0.tv_sec += 5;
+ tv0.tv_usec = 617*1000;
+ tor_gettimeofday_cache_set(&tv0);
+ for (i = 0; i < 600; ++i)
+ write_to_buf("ABCDEFG", 7, buf);
+ tt_int_op(4307, ==, buf_datalen(buf));
+
+ tt_int_op(2000, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+2123));
+ fetch_from_buf(tmp, 4000, buf);
+ fetch_from_buf(tmp, 306, buf);
+ tt_int_op(0, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+5617));
+ tt_int_op(383, ==, buf_get_oldest_chunk_timestamp(buf, START_MSEC+6000));
+
+ done:
+ buf_free(buf);
+ buf_free(buf2);
}
struct testcase_t buffer_tests[] = {
- { "basic", test_buffers_basic, 0, NULL, NULL },
- { "copy", test_buffer_copy, 0, NULL, NULL },
- { "ext_or_cmd", test_buffer_ext_or_cmd, 0, NULL, NULL },
+ { "basic", test_buffers_basic, TT_FORK, NULL, NULL },
+ { "copy", test_buffer_copy, TT_FORK, NULL, NULL },
+ { "pullup", test_buffer_pullup, TT_FORK, NULL, NULL },
+ { "ext_or_cmd", test_buffer_ext_or_cmd, TT_FORK, NULL, NULL },
+ { "allocation_tracking", test_buffer_allocation_tracking, TT_FORK,
+ NULL, NULL },
+ { "time_tracking", test_buffer_time_tracking, TT_FORK, NULL, NULL },
END_OF_TESTCASES
};
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