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-rw-r--r--src/test/test_bt_cl.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/test/test_bt_cl.c b/src/test/test_bt_cl.c
new file mode 100644
index 000000000..9ac9823dc
--- /dev/null
+++ b/src/test/test_bt_cl.c
@@ -0,0 +1,110 @@
+/* Copyright (c) 2012-2013, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "orconfig.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "or.h"
+#include "util.h"
+#include "backtrace.h"
+#include "torlog.h"
+
+
+/* -1: no crash.
+ * 0: crash with a segmentation fault.
+ * 1x: crash with an assertion failure. */
+static int crashtype = 0;
+
+#ifdef __GNUC__
+#define NOINLINE __attribute__((noinline))
+#define NORETURN __attribute__((noreturn))
+#endif
+
+int crash(int x) NOINLINE;
+int oh_what(int x) NOINLINE;
+int a_tangled_web(int x) NOINLINE;
+int we_weave(int x) NOINLINE;
+static void abort_handler(int s) NORETURN;
+
+int
+crash(int x)
+{
+ if (crashtype == 0) {
+ *(volatile int *)0 = 0;
+ } else if (crashtype == 1) {
+ tor_assert(1 == 0);
+ } else if (crashtype == -1) {
+ ;
+ }
+
+ crashtype *= x;
+ return crashtype;
+}
+
+int
+oh_what(int x)
+{
+ /* We call crash() twice here, so that the compiler won't try to do a
+ * tail-call optimization. Only the first call will actually happen, but
+ * telling the compiler to maybe do the second call will prevent it from
+ * replacing the first call with a jump. */
+ return crash(x) + crash(x*2);
+}
+
+int
+a_tangled_web(int x)
+{
+ return oh_what(x) * 99 + oh_what(x);
+}
+
+int
+we_weave(int x)
+{
+ return a_tangled_web(x) + a_tangled_web(x+1);
+}
+
+static void
+abort_handler(int s)
+{
+ (void)s;
+ exit(0);
+}
+
+int
+main(int argc, char **argv)
+{
+ log_severity_list_t severity;
+
+ if (argc < 2) {
+ puts("I take an argument. It should be \"assert\" or \"crash\" or "
+ "\"none\"");
+ return 1;
+ }
+ if (!strcmp(argv[1], "assert")) {
+ crashtype = 1;
+ } else if (!strcmp(argv[1], "crash")) {
+ crashtype = 0;
+ } else if (!strcmp(argv[1], "none")) {
+ crashtype = -1;
+ } else {
+ puts("Argument should be \"assert\" or \"crash\" or \"none\"");
+ return 1;
+ }
+
+ init_logging();
+ set_log_severity_config(LOG_WARN, LOG_ERR, &severity);
+ add_stream_log(&severity, "stdout", STDOUT_FILENO);
+ tor_log_update_sigsafe_err_fds();
+
+ configure_backtrace_handler(NULL);
+
+ signal(SIGABRT, abort_handler);
+
+ printf("%d\n", we_weave(2));
+
+ clean_up_backtrace_handler();
+
+ return 0;
+}
+