[wasm] Initial signal handler

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 8c05ff8bdd3e07349b54771eed2d323b41614d74..8ca7cbe83e3d4edf7e951b85a1f23b78e97af110 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -13862,6 +13862,12 @@ void Code::InvalidateEmbeddedObjects() {
 
 
 void Code::Relocate(intptr_t delta) {
+  if (trap_handler::EnableTrapHandler() && is_wasm_code()) {
+    const int index = trap_handler_index()->value();
+    if (index >= 0) {
+      trap_handler::UpdateCodePointer(index, instruction_start());
+    }
+  }
   for (RelocIterator it(this, RelocInfo::kApplyMask); !it.done(); it.next()) {
     it.rinfo()->apply(delta);
   }