1 files changed, 114 insertions, 0 deletions
diff --git a/lib/libc/tests/gen/glob2_test.c b/lib/libc/tests/gen/glob2_test.c
new file mode 100644
index 0000000000000..dfcce0eed3da2
--- /dev/null
+++ b/lib/libc/tests/gen/glob2_test.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2017 Dell EMC Isilon
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <glob.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <atf-c.h>
+
+/*
+ * Derived from Russ Cox' pathological case test program used for the
+ * https://research.swtch.com/glob article.
+ */
+ATF_TC_WITHOUT_HEAD(glob_pathological_test);
+ATF_TC_BODY(glob_pathological_test, tc)
+{
+	struct timespec t, t2;
+	glob_t g;
+	const char *longname = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+	    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+	char pattern[1000], *p;
+	double dt;
+	unsigned i, j, k, mul;
+	int fd, rc;
+
+	fd = open(longname, O_CREAT | O_RDWR, 0666);
+	ATF_REQUIRE(fd >= 0);
+
+	/*
+	 * Test up to 100 a* groups.  Exponential implementations typically go
+	 * bang at i=7 or 8.
+	 */
+	for (i = 0; i < 100; i++) {
+		/*
+		 * Create a*...b pattern with i 'a*' groups.
+		 */
+		p = pattern;
+		for (k = 0; k < i; k++) {
+			*p++ = 'a';
+			*p++ = '*';
+		}
+		*p++ = 'b';
+		*p = '\0';
+
+		clock_gettime(CLOCK_REALTIME, &t);
+		for (j = 0; j < mul; j++) {
+			memset(&g, 0, sizeof g);
+			rc = glob(pattern, 0, 0, &g);
+			if (rc == GLOB_NOSPACE || rc == GLOB_ABORTED) {
+				ATF_REQUIRE_MSG(rc == GLOB_NOMATCH,
+				    "an unexpected error occurred: "
+				    "rc=%d errno=%d", rc, errno);
+				/* NORETURN */
+			}
+
+			ATF_CHECK_MSG(rc == GLOB_NOMATCH,
+			    "A bogus match occurred: '%s' ~ '%s'", pattern,
+			    g.gl_pathv[0]);
+			globfree(&g);
+		}
+		clock_gettime(CLOCK_REALTIME, &t2);
+
+		t2.tv_sec -= t.tv_sec;
+		t2.tv_nsec -= t.tv_nsec;
+		dt = t2.tv_sec + (double)t2.tv_nsec/1e9;
+		dt /= mul;
+
+		ATF_CHECK_MSG(dt < 1, "glob(3) took far too long: %d %.9f", i,
+		    dt);
+
+		if (dt >= 0.0001)
+			mul = 1;
+	}
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+	ATF_TP_ADD_TC(tp, glob_pathological_test);
+
+	return (atf_no_error());
+}