mergegcc9

1 files changed, 73 insertions, 0 deletions

diff --git a/usr/src/test/libc-tests/tests/stdio/ftello_12768.c b/usr/src/test/libc-tests/tests/stdio/ftello_12768.c
new file mode 100644
index 0000000000..014f207876
--- /dev/null
+++ b/usr/src/test/libc-tests/tests/stdio/ftello_12768.c
@@ -0,0 +1,73 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright 2020 Oxide Computer Company
+ */
+
+/*
+ * Regression test for 12768 '12392 regressed ftello64 behavior'. The heart of
+ * the problem was a bad cast that resulted in us not properly transmitting that
+ * size.
+ */
+
+#include <stdio.h>
+#include <err.h>
+#include <stdlib.h>
+#include <sys/sysmacros.h>
+
+int
+main(void)
+{
+	FILE *f;
+	size_t i;
+	int ret = EXIT_SUCCESS;
+	static off_t offsets[] = {
+		23,
+		0xa0000,	/* 64 KiB */
+		0x100000,	/* 1 MiB */
+		0x7fffffffULL,	/* 2 GiB - 1 */
+		0xc0000000ULL,	/* 3 GiB */
+		0x200005432ULL	/* 8 GiB + misc */
+	};
+
+	f = tmpfile();
+	if (f == NULL) {
+		err(EXIT_FAILURE, "TEST FAILED: failed to create "
+		    "temporary file");
+	}
+
+	for (i = 0; i < ARRAY_SIZE(offsets); i++) {
+		off_t ftret;
+
+		if (fseeko(f, offsets[i], SEEK_SET) != 0) {
+			warn("TEST FAILED: failed to seek to %lld",
+			    (long long)offsets[i]);
+			ret = EXIT_FAILURE;
+		}
+
+		ftret = ftello(f);
+		if (ftret == -1) {
+			warn("TEST FAILED: failed to get stream position at "
+			    "%lld", (long long)offsets[i]);
+			ret = EXIT_FAILURE;
+		}
+
+		if (ftret != offsets[i]) {
+			warnx("TEST FAILED: stream position mismatch: expected "
+			    "%lld, found %lld", (long long)offsets[i],
+			    (long long)ftret);
+			ret = EXIT_FAILURE;
+		}
+	}
+
+	return (ret);
+}