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-rw-r--r--src/test/test-sigbus.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/src/test/test-sigbus.c b/src/test/test-sigbus.c
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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/mman.h>
+
+#include "util.h"
+#include "sigbus.h"
+
+int main(int argc, char *argv[]) {
+ _cleanup_close_ int fd = -1;
+ char template[] = "/tmp/sigbus-test-XXXXXX";
+ void *addr = NULL;
+ uint8_t *p;
+
+ sigbus_install();
+
+ assert(sigbus_pop(&addr) == 0);
+
+ assert_se((fd = mkostemp(template, O_RDWR|O_CREAT|O_EXCL)) >= 0);
+ assert_se(unlink(template) >= 0);
+ assert_se(fallocate(fd, 0, 0, page_size() * 8) >= 0);
+
+ p = mmap(NULL, page_size() * 16, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ assert_se(p != MAP_FAILED);
+
+ assert_se(sigbus_pop(&addr) == 0);
+
+ p[0] = 0xFF;
+ assert_se(sigbus_pop(&addr) == 0);
+
+ p[page_size()] = 0xFF;
+ assert_se(sigbus_pop(&addr) == 0);
+
+ p[page_size()*8] = 0xFF;
+ p[page_size()*8+1] = 0xFF;
+ p[page_size()*10] = 0xFF;
+ assert_se(sigbus_pop(&addr) > 0);
+ assert_se(addr == p + page_size() * 8);
+ assert_se(sigbus_pop(&addr) > 0);
+ assert_se(addr == p + page_size() * 10);
+ assert_se(sigbus_pop(&addr) == 0);
+
+ sigbus_reset();
+}