1 files changed, 68 insertions, 0 deletions
diff --git a/src/libsystemd/sd-journal/test-mmap-cache.c b/src/libsystemd/sd-journal/test-mmap-cache.c
new file mode 100644
index 0000000..ce5ea12
--- /dev/null
+++ b/src/libsystemd/sd-journal/test-mmap-cache.c
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "fd-util.h"
+#include "macro.h"
+#include "mmap-cache.h"
+#include "tests.h"
+#include "tmpfile-util.h"
+
+int main(int argc, char *argv[]) {
+        MMapFileDescriptor *fx;
+        int x, y, z, r;
+        char px[] = "/tmp/testmmapXXXXXXX", py[] = "/tmp/testmmapYXXXXXX", pz[] = "/tmp/testmmapZXXXXXX";
+        MMapCache *m;
+        void *p, *q;
+
+        test_setup_logging(LOG_DEBUG);
+
+        assert_se(m = mmap_cache_new());
+
+        x = mkostemp_safe(px);
+        assert_se(x >= 0);
+        (void) unlink(px);
+
+        assert_se(mmap_cache_add_fd(m, x, PROT_READ, &fx) > 0);
+
+        y = mkostemp_safe(py);
+        assert_se(y >= 0);
+        (void) unlink(py);
+
+        z = mkostemp_safe(pz);
+        assert_se(z >= 0);
+        (void) unlink(pz);
+
+        r = mmap_cache_fd_get(fx, 0, false, 1, 2, NULL, &p);
+        assert_se(r >= 0);
+
+        r = mmap_cache_fd_get(fx, 0, false, 2, 2, NULL, &q);
+        assert_se(r >= 0);
+
+        assert_se((uint8_t*) p + 1 == (uint8_t*) q);
+
+        r = mmap_cache_fd_get(fx, 1, false, 3, 2, NULL, &q);
+        assert_se(r >= 0);
+
+        assert_se((uint8_t*) p + 2 == (uint8_t*) q);
+
+        r = mmap_cache_fd_get(fx, 0, false, 16ULL*1024ULL*1024ULL, 2, NULL, &p);
+        assert_se(r >= 0);
+
+        r = mmap_cache_fd_get(fx, 1, false, 16ULL*1024ULL*1024ULL+1, 2, NULL, &q);
+        assert_se(r >= 0);
+
+        assert_se((uint8_t*) p + 1 == (uint8_t*) q);
+
+        mmap_cache_fd_free(fx);
+        mmap_cache_unref(m);
+
+        safe_close(x);
+        safe_close(y);
+        safe_close(z);
+
+        return 0;
+}