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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2015-12-13 14:24:55 -0500
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2015-12-13 15:00:30 -0500
commite3cc7fc45b395416462200e61af6877966488ea0 (patch)
treebe0f4d5698f9218986d77f9b50005b8e29df459d /src/journal/test-compress.c
parentd487b8151319a19313786feeba3af610bfb1a45f (diff)
journal: add "xfail" test for partial lz4 decompression
Add a test that LZ4_decompress_safe_partial does (not) work as expected, so that if it starts to work at some point, we'll catch this and adjust our code.
Diffstat (limited to 'src/journal/test-compress.c')
-rw-r--r--src/journal/test-compress.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/src/journal/test-compress.c b/src/journal/test-compress.c
index 62b5a508be..026fb173bc 100644
--- a/src/journal/test-compress.c
+++ b/src/journal/test-compress.c
@@ -17,6 +17,10 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#ifdef HAVE_LZ4
+#include <lz4.h>
+#endif
+
#include "alloc-util.h"
#include "compress.h"
#include "fd-util.h"
@@ -197,6 +201,42 @@ static void test_compress_stream(int compression,
assert_se(unlink(pattern2) == 0);
}
+#ifdef HAVE_LZ4
+static void test_lz4_decompress_partial(void) {
+ char buf[20000];
+ size_t buf_size = sizeof(buf), compressed;
+ int r;
+
+ char huge[4096*1024];
+ memset(huge, 'x', sizeof(huge));
+ memcpy(huge, "HUGE=", 5);
+
+ r = LZ4_compress_limitedOutput(huge, buf, sizeof(huge), buf_size);
+ assert_se(r >= 0);
+ compressed = r;
+ log_info("Compressed %zu → %zu", sizeof(huge), compressed);
+
+ r = LZ4_decompress_safe(buf, huge, r, sizeof(huge));
+ assert_se(r >= 0);
+ log_info("Decompressed → %i", r);
+
+ r = LZ4_decompress_safe_partial(buf, huge,
+ compressed,
+ 12, (int) sizeof(huge));
+ assert_se(r >= 0);
+ log_info("Decompressed partial %i/%zu → %i", 12, sizeof(huge), r);
+
+ /* We expect this to fail, because that's how current lz4 works. If this
+ * call succeeds, then lz4 has been fixed, and we need to change our code.
+ */
+ r = LZ4_decompress_safe_partial(buf, huge,
+ compressed,
+ 12, (int) sizeof(huge) - 1);
+ assert_se(r < 0);
+ log_info("Decompressed partial %i/%zu → %i", 12, sizeof(huge), r);
+}
+#endif
+
int main(int argc, char *argv[]) {
const char text[] =
"text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
@@ -239,6 +279,8 @@ int main(int argc, char *argv[]) {
test_compress_stream(OBJECT_COMPRESSED_LZ4, "lz4cat",
compress_stream_lz4, decompress_stream_lz4, argv[0]);
+
+ test_lz4_decompress_partial();
#else
log_info("/* LZ4 test skipped */");
#endif