[wasm] Initial signal handler

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index 74a0b56e4f7a5ab9232061ed744818e630e1546f..d23c796d9fb97bba8973d1439d7e7996c8ee9670 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -34,6 +34,7 @@
 #include "src/msan.h"
 #include "src/objects-inl.h"
 #include "src/snapshot/natives.h"
+#include "src/trap-handler/trap-handler.h"
 #include "src/utils.h"
 #include "src/v8.h"
 
@@ -2992,6 +2993,10 @@ int Shell::Main(int argc, char* argv[]) {
     create_params.add_histogram_sample_callback = AddHistogramSample;
   }
 
+  if (i::FLAG_wasm_trap_handler) {
+    v8::V8::RegisterDefaultSignalHandler();
+  }
+
   Isolate* isolate = Isolate::New(create_params);
   {
     Isolate::Scope scope(isolate);