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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
new file mode 100644
index 0000000..299463c
--- /dev/null
+++ b/src/test/test-sigbus.c
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#if HAVE_VALGRIND_VALGRIND_H
+# include <valgrind/valgrind.h>
+#endif
+
+#include "fd-util.h"
+#include "fs-util.h"
+#include "memory-util.h"
+#include "sigbus.h"
+#include "tests.h"
+
+int main(int argc, char *argv[]) {
+ _cleanup_close_ int fd = -EBADF;
+ char template[] = "/tmp/sigbus-test-XXXXXX";
+ void *addr = NULL;
+ uint8_t *p;
+
+ test_setup_logging(LOG_INFO);
+
+#if HAS_FEATURE_ADDRESS_SANITIZER
+ return log_tests_skipped("address-sanitizer is enabled");
+#endif
+#if HAVE_VALGRIND_VALGRIND_H
+ if (RUNNING_ON_VALGRIND)
+ return log_tests_skipped("This test cannot run on valgrind");
+#endif
+
+ sigbus_install();
+
+ assert_se(sigbus_pop(&addr) == 0);
+
+ assert_se((fd = mkostemp(template, O_RDWR|O_CREAT|O_EXCL)) >= 0);
+ assert_se(unlink(template) >= 0);
+ assert_se(posix_fallocate_loop(fd, 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();
+}