To satisfy ASAN, use stub instead of & operator to get C++ stack pointer.

runtime/vm/simulator_mips.cc

Index: runtime/vm/simulator_mips.cc
===================================================================
--- runtime/vm/simulator_mips.cc	(revision 43859)
+++ runtime/vm/simulator_mips.cc	(working copy)
@@ -55,7 +55,7 @@
     link_ = sim->last_setjmp_buffer();
     sim->set_last_setjmp_buffer(this);
     sp_ = static_cast<uword>(sim->get_register(SP));
-    native_sp_ = reinterpret_cast<uword>(&sim);  // Current C++ stack pointer.
+    native_sp_ = Isolate::GetCurrentStackPointer();
   }
 
   ~SimulatorSetjmpBuffer() {
@@ -1241,7 +1241,7 @@
           (redirection->call_kind() == kBootstrapNativeCall) ||
           (redirection->call_kind() == kNativeCall)) {
         // Set the top_exit_frame_info of this simulator to the native stack.
-        set_top_exit_frame_info(reinterpret_cast<uword>(&buffer));
+        set_top_exit_frame_info(Isolate::GetCurrentStackPointer());
       }
       if (redirection->call_kind() == kRuntimeCall) {
         NativeArguments arguments;