[LTP] [PATCH] new syscall test:fork14

[Madper X. <cx...@re...>]

Signed-off-by: Madper Xie <cx...@re...>
---
 testcases/kernel/syscalls/fork/fork14.c | 102 ++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 testcases/kernel/syscalls/fork/fork14.c

diff --git a/testcases/kernel/syscalls/fork/fork14.c b/testcases/kernel/syscalls/fork/fork14.c
new file mode 100644
index 0000000..5046e67
--- /dev/null
+++ b/testcases/kernel/syscalls/fork/fork14.c
@@ -0,0 +1,102 @@
+/*********************************************************************
+ * Copyright (C) 2012  Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it
+ * is free of the rightful claim of any third person regarding
+ * infringement or the like.  Any license provided herein, whether
+ * implied or otherwise, applies only to this software file.  Patent
+ * licenses, if any, provided herein do not apply to combinations of
+ * this program with other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * Description: This test is for kernel commit:
+ *              7edc8b0ac16cbaed7cb4ea4c6b95ce98d2997e84
+ *		Since vma length in dup_mmap is calculated and stored
+ *              in a unsigned int, it will overflow when length > 16
+ *              TB. The commit above fixed it. This case is to verify
+ *              whether that patch is added.
+ ********************************************************************/
+
+#include <sys/mman.h>
+#include <sys/wait.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "test.h"
+#include "usctest.h"
+
+char *TCID = "fork14";
+
+#define GIG (1024 * 1024 * 1024L)
+#define EXTENT 16393
+
+/*
+ * If The vma length in dup_mmap is
+ * calculated and stored in a unsigned int,
+ * will overflow when length > 16TB.
+ */
+#define LARGE  16383
+
+static void setup();
+static void cleanup();
+
+int main(int argc, char *argv[])
+{
+	int i, r, lc;
+	void *m;
+
+/*
+ * I test this case on ppc64/x86_64/i386/s390x
+ * Only ppc64 x86_64 s390x can run it.
+ * So, I think it's only for 64bit system
+ * The fork will always successed on 32bit.
+ */
+#if __WORDSIZE == 32
+	tst_brkm(TCONF, NULL, "This test is only for 64bit.");
+#endif
+	setup();
+	for (lc = 0; TEST_LOOPING(lc); lc++){	
+		for (i = 0; i < EXTENT; i++) {
+			m = mmap(NULL, (size_t) 1 * GIG, PROT_READ | PROT_WRITE,
+				MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
+			switch (fork()){
+			case -1:
+				break;
+			case 0 :
+				exit(0);
+			default:
+				if (waitpid(-1, NULL, 0) == -1)
+					tst_brkm(TBROK|TERRNO,
+						cleanup, "waitpid");
+				if (i >= LARGE) 
+					tst_brkm(TFAIL, NULL,
+						"Fork succeed unexpect:%d", i);
+			}
+		}
+	}
+	
+	cleanup();
+	tst_exit();
+}
+
+static void setup(void)
+{
+	tst_sig(FORK, DEF_HANDLER, cleanup);
+	TEST_PAUSE;
+}
+
+static void cleanup(void)
+{
+	TEST_CLEANUP;
+}
-- 
1.7.12