DataFlowSanitizer; compiler-rt changes.

DataFlowSanitizer is a generalised dynamic data flow analysis.

Unlike other Sanitizer tools, this tool is not designed to detect a
specific class of bugs on its own.  Instead, it provides a generic
dynamic data flow analysis framework to be used by clients to help
detect application-specific issues within their own code.

Differential Revision: http://llvm-reviews.chandlerc.com/D967

llvm-svn: 187924

1 files changed, 17 insertions, 0 deletions

diff --git a/compiler-rt/lib/dfsan/lit_tests/basic.c b/compiler-rt/lib/dfsan/lit_tests/basic.c
new file mode 100644
index 00000000000..db1acb71208
--- /dev/null
+++ b/compiler-rt/lib/dfsan/lit_tests/basic.c
@@ -0,0 +1,17 @@
+// RUN: %clang_dfsan -m64 %s -o %t && %t
+
+// Tests that labels are propagated through loads and stores.
+
+#include <sanitizer/dfsan_interface.h>
+#include <assert.h>
+
+int main(void) {
+  int i = 1;
+  dfsan_label i_label = dfsan_create_label("i", 0);
+  dfsan_set_label(i_label, &i, sizeof(i));
+
+  dfsan_label new_label = dfsan_get_label(i);
+  assert(i_label == new_label);
+
+  return 0;
+}