1 files changed, 67 insertions, 0 deletions
diff --git a/libvtv/testsuite/temp_deriv.cc b/libvtv/testsuite/temp_deriv.cc
new file mode 100644
index 00000000000..ca360c0bc91
--- /dev/null
+++ b/libvtv/testsuite/temp_deriv.cc
@@ -0,0 +1,67 @@
+// Compile with /home/llozano/local2/proj/vtable/gcc-root/usr/local/bin/g++ -m32 -fvtable-verify=std -fpic -rdynamic -Wl,-R,/home/llozano/local2/proj/vtable/gcc-root/usr/local/lib32:./lib32 -I/home/llozano/local2/proj/vtable/vt2/gcc-4_6-mobile-vtable-security//libstdc++-v3/libsupc++ temp_deriv.cc -O0 -ldl -lpthread -Wl,--whole-archive,-lvtv_init,--no-whole-archive,-z,relro -DTPID=0 -g
+// Look at assembly with: objdump -drl a.out
+
+#include <dlfcn.h>
+#include <assert.h>
+
+extern "C" int printf(const char *, ...);
+
+static int counter = 0;
+
+template <int i> struct base
+{
+  virtual void inc() { counter += i; }
+};
+
+template <int i> struct derived: base<i>
+{
+  virtual void inc() { counter += (10*i); }
+};
+
+// We don't use this class. It is just here so that the
+// compiler does not devirtualize calls to derived::inc()
+template <int i> struct derived2: derived<i>
+{
+  virtual void inc() { counter += (20*i); }
+};
+
+static base<TPID> * bp = new base<TPID>();
+static derived<TPID> * dp = new derived<TPID>();
+static base<TPID> * dbp = new derived<TPID>();
+
+// Given 2 pointers to C++ objects (non PODs), exchange the pointers to vtable
+void exchange_vtptr(void * object1_ptr, void * object2_ptr)
+{
+  void ** object1_vtptr_ptr = (void **)object1_ptr;
+  void ** object2_vtptr_ptr = (void **)object2_ptr;
+  void * object1_vtptr = *object1_vtptr_ptr;
+  void * object2_vtptr = *object2_vtptr_ptr;
+  *object1_vtptr_ptr = object2_vtptr;
+  *object2_vtptr_ptr = object1_vtptr;
+}
+
+main()
+{
+  int prev_counter;
+
+  exchange_vtptr(bp, dp);
+  exchange_vtptr(bp, dp);
+  exchange_vtptr(bp, dbp);
+  exchange_vtptr(bp, dbp);
+
+  counter = 0;
+  bp->inc();
+  dp->inc();
+  dbp->inc();
+  assert(counter == (TPID + 10*TPID + 10*TPID));
+
+  prev_counter = counter;
+  exchange_vtptr(bp, dp);
+  bp->inc(); // This one should succeed but it is calling the wrong member
+  assert(counter == (prev_counter + 10*TPID));
+  printf("Pass first attack!\n");
+  dp->inc();
+  printf("TPDI=%d counter %d\n", TPID, counter);
+  printf("Pass second attack!\n");
+
+}