1 files changed, 62 insertions, 0 deletions
diff --git a/src/lib/kStuff/kProfiler2/tstlongjmp.c b/src/lib/kStuff/kProfiler2/tstlongjmp.c
new file mode 100644
index 0000000..d6e2b49
--- /dev/null
+++ b/src/lib/kStuff/kProfiler2/tstlongjmp.c
@@ -0,0 +1,62 @@
+
+#include <setjmp.h>
+#include <time.h>
+
+/* just try trick the compiler into not optimizing stuff by
+   making it "uncertain" which path to take. */
+int always_true(void)
+{
+    time_t t = time(NULL);
+    if (t == time(NULL))
+        return 1;
+    if (t != time(NULL))
+        return 1;
+    if (t == time(NULL))
+        return 1;
+    if (t != time(NULL))
+        return 1;
+    return 0;
+}
+
+jmp_buf g_JmpBuf;
+
+int onelevel(void)
+{
+    if (always_true())
+        longjmp(g_JmpBuf, 1);
+    return 0;
+}
+
+
+int twolevels_inner(void)
+{
+    if (always_true())
+        longjmp(g_JmpBuf, 1);
+    return 0;
+}
+
+int twolevels_outer(void)
+{
+    int rc;
+    always_true();
+    rc = twolevels_inner();
+    always_true();
+    return rc;
+}
+
+
+int main()
+{
+    int rc = 1;
+
+    /* first */
+    if (!setjmp(g_JmpBuf))
+        rc = onelevel();
+
+    /* second */
+    if (!setjmp(g_JmpBuf))
+        rc = twolevels_outer();
+
+    return rc != 1;
+}
+