[wasm] Initial signal handler

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index d3fbd4fe253960db46df8b1452634ff2330f56dd..43c2da85de4cdf7ccac8d7a81fa0584185a9a851 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -13698,6 +13698,12 @@ void Code::InvalidateEmbeddedObjects() {
 
 
 void Code::Relocate(intptr_t delta) {
+  if (trap_handler::ShouldEnableTrapHandler() && 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);
   }